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Merge branch 'pm-cpufreq' 

* pm-cpufreq: (23 commits)
  cpufreq: Register drivers only after CPU devices have been registered
  cpufreq: Add NULL checks to show() and store() methods of cpufreq
  cpufreq: intel_pstate: Fix plain int as pointer warning from sparse
  cpufreq: sun50i: Fix CPU speed bin detection
  cpufreq: powernv: fix stack bloat and hard limit on number of CPUs
  cpufreq: Clarify the comment in cpufreq_set_policy()
  cpufreq: vexpress-spc: find and skip duplicates when merging frequencies
  cpufreq: vexpress-spc: use macros instead of hardcoded values for cluster ids
  cpufreq: s3c64xx: Remove pointless NULL check in s3c64xx_cpufreq_driver_init
  cpufreq: imx-cpufreq-dt: Correct i.MX8MN's default speed grade value
  cpufreq: vexpress-spc: fix some coding style issues
  cpufreq: vexpress-spc: remove lots of debug messages
  cpufreq: vexpress-spc: drop unnessary cpufreq_arm_bL_ops abstraction
  cpufreq: merge arm_big_little and vexpress-spc
  cpufreq: scpi: remove stale/outdated comment about the driver
  ARM: dts: Add OPP-V2 table for AM3517
  cpufreq: ti-cpufreq: Add support for AM3517
  ARM: dts: omap36xx: using OPP1G needs to control the abb_ldo
  cpufreq: ti-cpufreq: omap36xx use "cpu0","vbb" if run in multi_regulator mode
  ARM: dts: omap3: bulk convert compatible to be explicitly ti,omap3430 or ti,omap3630 or ti,am3517
  ...
This commit is contained in:
Rafael J. Wysocki 2019-11-26 10:27:01 +01:00
parent 6221403952 46770be0cf
commit c48b90f84a
58 changed files with 949 additions and 874 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
Documentation/devicetree/bindings/arm/omap/omap.txt
View File

@ -43,7 +43,7 @@ SoC Families:
- OMAP2 generic - defaults to OMAP2420
compatible = "ti,omap2"
- OMAP3 generic - defaults to OMAP3430
- OMAP3 generic
compatible = "ti,omap3"
- OMAP4 generic - defaults to OMAP4430
compatible = "ti,omap4"
@ -51,6 +51,8 @@ SoC Families:
compatible = "ti,omap5"
- DRA7 generic - defaults to DRA742
compatible = "ti,dra7"
- AM33x generic
compatible = "ti,am33xx"
- AM43x generic - defaults to AM4372
compatible = "ti,am43"
@ -63,12 +65,14 @@ SoCs:
- OMAP3430
compatible = "ti,omap3430", "ti,omap3"
legacy: "ti,omap34xx" - please do not use any more
- AM3517
compatible = "ti,am3517", "ti,omap3"
- OMAP3630
compatible = "ti,omap36xx", "ti,omap3"
- AM33xx
compatible = "ti,am33xx", "ti,omap3"
compatible = "ti,omap3630", "ti,omap3"
legacy: "ti,omap36xx" - please do not use any more
- AM335x
compatible = "ti,am33xx"
- OMAP4430
compatible = "ti,omap4430", "ti,omap4"
@ -110,19 +114,19 @@ SoCs:
- AM4372
compatible = "ti,am4372", "ti,am43"
Boards:
Boards (incomplete list of examples):
- OMAP3 BeagleBoard : Low cost community board
compatible = "ti,omap3-beagle", "ti,omap3"
compatible = "ti,omap3-beagle", "ti,omap3430", "ti,omap3"
- OMAP3 Tobi with Overo : Commercial expansion board with daughter board
compatible = "gumstix,omap3-overo-tobi", "gumstix,omap3-overo", "ti,omap3"
compatible = "gumstix,omap3-overo-tobi", "gumstix,omap3-overo", "ti,omap3430", "ti,omap3"
- OMAP4 SDP : Software Development Board
compatible = "ti,omap4-sdp", "ti,omap4430"
compatible = "ti,omap4-sdp", "ti,omap4430", "ti,omap4"
- OMAP4 PandaBoard : Low cost community board
compatible = "ti,omap4-panda", "ti,omap4430"
compatible = "ti,omap4-panda", "ti,omap4430", "ti,omap4"
- OMAP4 DuoVero with Parlor : Commercial expansion board with daughter board
compatible = "gumstix,omap4-duovero-parlor", "gumstix,omap4-duovero", "ti,omap4430", "ti,omap4";
@ -134,16 +138,16 @@ Boards:
compatible = "variscite,var-dvk-om44", "variscite,var-som-om44", "ti,omap4460", "ti,omap4";
- OMAP3 EVM : Software Development Board for OMAP35x, AM/DM37x
compatible = "ti,omap3-evm", "ti,omap3"
compatible = "ti,omap3-evm", "ti,omap3630", "ti,omap3"
- AM335X EVM : Software Development Board for AM335x
compatible = "ti,am335x-evm", "ti,am33xx", "ti,omap3"
compatible = "ti,am335x-evm", "ti,am33xx"
- AM335X Bone : Low cost community board
compatible = "ti,am335x-bone", "ti,am33xx", "ti,omap3"
compatible = "ti,am335x-bone", "ti,am33xx"
- AM3359 ICEv2 : Low cost Industrial Communication Engine EVM.
compatible = "ti,am3359-icev2", "ti,am33xx", "ti,omap3"
compatible = "ti,am3359-icev2", "ti,am33xx"
- AM335X OrionLXm : Substation Automation Platform
compatible = "novatech,am335x-lxm", "ti,am33xx"

6
Documentation/devicetree/bindings/cpufreq/ti-cpufreq.txt
View File

@ -15,12 +15,16 @@ In 'cpus' nodes:
In 'operating-points-v2' table:
- compatible: Should be
- 'operating-points-v2-ti-cpu' for am335x, am43xx, and dra7xx/am57xx SoCs
- 'operating-points-v2-ti-cpu' for am335x, am43xx, and dra7xx/am57xx,
omap34xx, omap36xx and am3517 SoCs
- syscon: A phandle pointing to a syscon node representing the control module
register space of the SoC.
Optional properties:
--------------------
- "vdd-supply", "vbb-supply": to define two regulators for dra7xx
- "cpu0-supply", "vbb-supply": to define two regulators for omap36xx
For each opp entry in 'operating-points-v2' table:
- opp-supported-hw: Two bitfields indicating:
1. Which revision of the SoC the OPP is supported by

5
MAINTAINERS
View File

@ -4269,14 +4269,13 @@ F: include/linux/cpufreq.h
F: include/linux/sched/cpufreq.h
F: tools/testing/selftests/cpufreq/
CPU FREQUENCY DRIVERS - ARM BIG LITTLE
CPU FREQUENCY DRIVERS - VEXPRESS SPC ARM BIG LITTLE
M: Viresh Kumar <viresh.kumar@linaro.org>
M: Sudeep Holla <sudeep.holla@arm.com>
L: linux-pm@vger.kernel.org
W: http://www.arm.com/products/processors/technologies/biglittleprocessing.php
S: Maintained
F: drivers/cpufreq/arm_big_little.h
F: drivers/cpufreq/arm_big_little.c
F: drivers/cpufreq/vexpress-spc-cpufreq.c
CPU POWER MONITORING SUBSYSTEM
M: Thomas Renninger <trenn@suse.com>

31
arch/arm/boot/dts/am3517.dtsi
View File

@ -16,6 +16,37 @@
can = &hecc;
};
cpus {
cpu: cpu@0 {
/* Based on OMAP3630 variants OPP50 and OPP100 */
operating-points-v2 = <&cpu0_opp_table>;
clock-latency = <300000>; /* From legacy driver */
};
};
cpu0_opp_table: opp-table {
compatible = "operating-points-v2-ti-cpu";
syscon = <&scm_conf>;
/*
* AM3517 TRM only lists 600MHz @ 1.2V, but omap36xx
* appear to operate at 300MHz as well. Since AM3517 only
* lists one operating voltage, it will remain fixed at 1.2V
*/
opp50-300000000 {
opp-hz = /bits/ 64 <300000000>;
opp-microvolt = <1200000>;
opp-supported-hw = <0xffffffff 0xffffffff>;
opp-suspend;
};
opp100-600000000 {
opp-hz = /bits/ 64 <600000000>;
opp-microvolt = <1200000>;
opp-supported-hw = <0xffffffff 0xffffffff>;
};
};
ocp@68000000 {
am35x_otg_hs: am35x_otg_hs@5c040000 {
compatible = "ti,omap3-musb";

2
arch/arm/boot/dts/am3517_mt_ventoux.dts
View File

@ -8,7 +8,7 @@
/ {
model = "TeeJet Mt.Ventoux";
compatible = "teejet,mt_ventoux", "ti,omap3";
compatible = "teejet,mt_ventoux", "ti,am3517", "ti,omap3";
memory@80000000 {
device_type = "memory";

2
arch/arm/boot/dts/logicpd-som-lv-35xx-devkit.dts
View File

@ -9,5 +9,5 @@
/ {
model = "LogicPD Zoom OMAP35xx SOM-LV Development Kit";
compatible = "logicpd,dm3730-som-lv-devkit", "ti,omap3";
compatible = "logicpd,dm3730-som-lv-devkit", "ti,omap3430", "ti,omap3";
};

2
arch/arm/boot/dts/logicpd-torpedo-35xx-devkit.dts
View File

@ -9,5 +9,5 @@
/ {
model = "LogicPD Zoom OMAP35xx Torpedo Development Kit";
compatible = "logicpd,dm3730-torpedo-devkit", "ti,omap3";
compatible = "logicpd,dm3730-torpedo-devkit", "ti,omap3430", "ti,omap3";
};

2
arch/arm/boot/dts/omap3-beagle-xm.dts
View File

@ -8,7 +8,7 @@
/ {
model = "TI OMAP3 BeagleBoard xM";
compatible = "ti,omap3-beagle-xm", "ti,omap36xx", "ti,omap3";
compatible = "ti,omap3-beagle-xm", "ti,omap3630", "ti,omap36xx", "ti,omap3";
cpus {
cpu@0 {

2
arch/arm/boot/dts/omap3-beagle.dts
View File

@ -8,7 +8,7 @@
/ {
model = "TI OMAP3 BeagleBoard";
compatible = "ti,omap3-beagle", "ti,omap3";
compatible = "ti,omap3-beagle", "ti,omap3430", "ti,omap3";
cpus {
cpu@0 {

2
arch/arm/boot/dts/omap3-cm-t3530.dts
View File

@ -9,7 +9,7 @@
/ {
model = "CompuLab CM-T3530";
compatible = "compulab,omap3-cm-t3530", "ti,omap34xx", "ti,omap3";
compatible = "compulab,omap3-cm-t3530", "ti,omap3430", "ti,omap34xx", "ti,omap3";
/* Regulator to trigger the reset signal of the Wifi module */
mmc2_sdio_reset: regulator-mmc2-sdio-reset {

2
arch/arm/boot/dts/omap3-cm-t3730.dts
View File

@ -9,7 +9,7 @@
/ {
model = "CompuLab CM-T3730";
compatible = "compulab,omap3-cm-t3730", "ti,omap36xx", "ti,omap3";
compatible = "compulab,omap3-cm-t3730", "ti,omap3630", "ti,omap36xx", "ti,omap3";
wl12xx_vmmc2: wl12xx_vmmc2 {
compatible = "regulator-fixed";

2
arch/arm/boot/dts/omap3-devkit8000-lcd43.dts
View File

@ -11,7 +11,7 @@
#include "omap3-devkit8000-lcd-common.dtsi"
/ {
model = "TimLL OMAP3 Devkit8000 with 4.3'' LCD panel";
compatible = "timll,omap3-devkit8000", "ti,omap3";
compatible = "timll,omap3-devkit8000", "ti,omap3430", "ti,omap3";
lcd0: display {
panel-timing {

2
arch/arm/boot/dts/omap3-devkit8000-lcd70.dts
View File

@ -11,7 +11,7 @@
#include "omap3-devkit8000-lcd-common.dtsi"
/ {
model = "TimLL OMAP3 Devkit8000 with 7.0'' LCD panel";
compatible = "timll,omap3-devkit8000", "ti,omap3";
compatible = "timll,omap3-devkit8000", "ti,omap3430", "ti,omap3";
lcd0: display {
panel-timing {

2
arch/arm/boot/dts/omap3-devkit8000.dts
View File

@ -7,7 +7,7 @@
#include "omap3-devkit8000-common.dtsi"
/ {
model = "TimLL OMAP3 Devkit8000";
compatible = "timll,omap3-devkit8000", "ti,omap3";
compatible = "timll,omap3-devkit8000", "ti,omap3430", "ti,omap3";
aliases {
display1 = &dvi0;

2
arch/arm/boot/dts/omap3-gta04.dtsi
View File

@ -11,7 +11,7 @@
/ {
model = "OMAP3 GTA04";
compatible = "ti,omap3-gta04", "ti,omap36xx", "ti,omap3";
compatible = "ti,omap3-gta04", "ti,omap3630", "ti,omap36xx", "ti,omap3";
cpus {
cpu@0 {

2
arch/arm/boot/dts/omap3-ha-lcd.dts
View File

@ -8,7 +8,7 @@
/ {
model = "TI OMAP3 HEAD acoustics LCD-baseboard with TAO3530 SOM";
compatible = "headacoustics,omap3-ha-lcd", "technexion,omap3-tao3530", "ti,omap34xx", "ti,omap3";
compatible = "headacoustics,omap3-ha-lcd", "technexion,omap3-tao3530", "ti,omap3430", "ti,omap34xx", "ti,omap3";
};
&omap3_pmx_core {

2
arch/arm/boot/dts/omap3-ha.dts
View File

@ -8,7 +8,7 @@
/ {
model = "TI OMAP3 HEAD acoustics baseboard with TAO3530 SOM";
compatible = "headacoustics,omap3-ha", "technexion,omap3-tao3530", "ti,omap34xx", "ti,omap3";
compatible = "headacoustics,omap3-ha", "technexion,omap3-tao3530", "ti,omap3430", "ti,omap34xx", "ti,omap3";
};
&omap3_pmx_core {

2
arch/arm/boot/dts/omap3-igep0020-rev-f.dts
View File

@ -10,7 +10,7 @@
/ {
model = "IGEPv2 Rev. F (TI OMAP AM/DM37x)";
compatible = "isee,omap3-igep0020-rev-f", "ti,omap36xx", "ti,omap3";
compatible = "isee,omap3-igep0020-rev-f", "ti,omap3630", "ti,omap36xx", "ti,omap3";
/* Regulator to trigger the WL_EN signal of the Wifi module */
lbep5clwmc_wlen: regulator-lbep5clwmc-wlen {

2
arch/arm/boot/dts/omap3-igep0020.dts
View File

@ -10,7 +10,7 @@
/ {
model = "IGEPv2 Rev. C (TI OMAP AM/DM37x)";
compatible = "isee,omap3-igep0020", "ti,omap36xx", "ti,omap3";
compatible = "isee,omap3-igep0020", "ti,omap3630", "ti,omap36xx", "ti,omap3";
vmmcsdio_fixed: fixedregulator-mmcsdio {
compatible = "regulator-fixed";

2
arch/arm/boot/dts/omap3-igep0030-rev-g.dts
View File

@ -10,7 +10,7 @@
/ {
model = "IGEP COM MODULE Rev. G (TI OMAP AM/DM37x)";
compatible = "isee,omap3-igep0030-rev-g", "ti,omap36xx", "ti,omap3";
compatible = "isee,omap3-igep0030-rev-g", "ti,omap3630", "ti,omap36xx", "ti,omap3";
/* Regulator to trigger the WL_EN signal of the Wifi module */
lbep5clwmc_wlen: regulator-lbep5clwmc-wlen {

2
arch/arm/boot/dts/omap3-igep0030.dts
View File

@ -10,7 +10,7 @@
/ {
model = "IGEP COM MODULE Rev. E (TI OMAP AM/DM37x)";
compatible = "isee,omap3-igep0030", "ti,omap36xx", "ti,omap3";
compatible = "isee,omap3-igep0030", "ti,omap3630", "ti,omap36xx", "ti,omap3";
vmmcsdio_fixed: fixedregulator-mmcsdio {
compatible = "regulator-fixed";

2
arch/arm/boot/dts/omap3-ldp.dts
View File

@ -10,7 +10,7 @@
/ {
model = "TI OMAP3430 LDP (Zoom1 Labrador)";
compatible = "ti,omap3-ldp", "ti,omap3";
compatible = "ti,omap3-ldp", "ti,omap3430", "ti,omap3";
memory@80000000 {
device_type = "memory";

2
arch/arm/boot/dts/omap3-lilly-a83x.dtsi
View File

@ -7,7 +7,7 @@
/ {
model = "INCOstartec LILLY-A83X module (DM3730)";
compatible = "incostartec,omap3-lilly-a83x", "ti,omap36xx", "ti,omap3";
compatible = "incostartec,omap3-lilly-a83x", "ti,omap3630", "ti,omap36xx", "ti,omap3";
chosen {
bootargs = "console=ttyO0,115200n8 vt.global_cursor_default=0 consoleblank=0";

2
arch/arm/boot/dts/omap3-lilly-dbb056.dts
View File

@ -8,7 +8,7 @@
/ {
model = "INCOstartec LILLY-DBB056 (DM3730)";
compatible = "incostartec,omap3-lilly-dbb056", "incostartec,omap3-lilly-a83x", "ti,omap36xx", "ti,omap3";
compatible = "incostartec,omap3-lilly-dbb056", "incostartec,omap3-lilly-a83x", "ti,omap3630", "ti,omap36xx", "ti,omap3";
};
&twl {

2
arch/arm/boot/dts/omap3-n9.dts
View File

@ -12,7 +12,7 @@
/ {
model = "Nokia N9";
compatible = "nokia,omap3-n9", "ti,omap36xx", "ti,omap3";
compatible = "nokia,omap3-n9", "ti,omap3630", "ti,omap36xx", "ti,omap3";
};
&i2c2 {

7
arch/arm/boot/dts/omap3-n950-n9.dtsi
View File

@ -11,13 +11,6 @@
cpus {
cpu@0 {
cpu0-supply = <&vcc>;
operating-points = <
/* kHz uV */
300000 1012500
600000 1200000
800000 1325000
1000000 1375000
>;
};
};

2
arch/arm/boot/dts/omap3-n950.dts
View File

@ -12,7 +12,7 @@
/ {
model = "Nokia N950";
compatible = "nokia,omap3-n950", "ti,omap36xx", "ti,omap3";
compatible = "nokia,omap3-n950", "ti,omap3630", "ti,omap36xx", "ti,omap3";
keys {
compatible = "gpio-keys";

2
arch/arm/boot/dts/omap3-overo-storm-alto35.dts
View File

@ -14,5 +14,5 @@
/ {
model = "OMAP36xx/AM37xx/DM37xx Gumstix Overo on Alto35";
compatible = "gumstix,omap3-overo-alto35", "gumstix,omap3-overo", "ti,omap36xx", "ti,omap3";
compatible = "gumstix,omap3-overo-alto35", "gumstix,omap3-overo", "ti,omap3630", "ti,omap36xx", "ti,omap3";
};

2
arch/arm/boot/dts/omap3-overo-storm-chestnut43.dts
View File

@ -14,7 +14,7 @@
/ {
model = "OMAP36xx/AM37xx/DM37xx Gumstix Overo on Chestnut43";
compatible = "gumstix,omap3-overo-chestnut43", "gumstix,omap3-overo", "ti,omap36xx", "ti,omap3";
compatible = "gumstix,omap3-overo-chestnut43", "gumstix,omap3-overo", "ti,omap3630", "ti,omap36xx", "ti,omap3";
};
&omap3_pmx_core2 {

2
arch/arm/boot/dts/omap3-overo-storm-gallop43.dts
View File

@ -14,7 +14,7 @@
/ {
model = "OMAP36xx/AM37xx/DM37xx Gumstix Overo on Gallop43";
compatible = "gumstix,omap3-overo-gallop43", "gumstix,omap3-overo", "ti,omap36xx", "ti,omap3";
compatible = "gumstix,omap3-overo-gallop43", "gumstix,omap3-overo", "ti,omap3630", "ti,omap36xx", "ti,omap3";
};
&omap3_pmx_core2 {

2
arch/arm/boot/dts/omap3-overo-storm-palo35.dts
View File

@ -14,7 +14,7 @@
/ {
model = "OMAP36xx/AM37xx/DM37xx Gumstix Overo on Palo35";
compatible = "gumstix,omap3-overo-palo35", "gumstix,omap3-overo", "ti,omap36xx", "ti,omap3";
compatible = "gumstix,omap3-overo-palo35", "gumstix,omap3-overo", "ti,omap3630", "ti,omap36xx", "ti,omap3";
};
&omap3_pmx_core2 {

2
arch/arm/boot/dts/omap3-overo-storm-palo43.dts
View File

@ -14,7 +14,7 @@
/ {
model = "OMAP36xx/AM37xx/DM37xx Gumstix Overo on Palo43";
compatible = "gumstix,omap3-overo-palo43", "gumstix,omap3-overo", "ti,omap36xx", "ti,omap3";
compatible = "gumstix,omap3-overo-palo43", "gumstix,omap3-overo", "ti,omap3630", "ti,omap36xx", "ti,omap3";
};
&omap3_pmx_core2 {

2
arch/arm/boot/dts/omap3-overo-storm-summit.dts
View File

@ -14,7 +14,7 @@
/ {
model = "OMAP36xx/AM37xx/DM37xx Gumstix Overo on Summit";
compatible = "gumstix,omap3-overo-summit", "gumstix,omap3-overo", "ti,omap36xx", "ti,omap3";
compatible = "gumstix,omap3-overo-summit", "gumstix,omap3-overo", "ti,omap3630", "ti,omap36xx", "ti,omap3";
};
&omap3_pmx_core2 {

2
arch/arm/boot/dts/omap3-overo-storm-tobi.dts
View File

@ -14,6 +14,6 @@
/ {
model = "OMAP36xx/AM37xx/DM37xx Gumstix Overo on Tobi";
compatible = "gumstix,omap3-overo-tobi", "gumstix,omap3-overo", "ti,omap36xx", "ti,omap3";
compatible = "gumstix,omap3-overo-tobi", "gumstix,omap3-overo", "ti,omap3630", "ti,omap36xx", "ti,omap3";
};

2
arch/arm/boot/dts/omap3-overo-storm-tobiduo.dts
View File

@ -14,5 +14,5 @@
/ {
model = "OMAP36xx/AM37xx/DM37xx Gumstix Overo on TobiDuo";
compatible = "gumstix,omap3-overo-tobiduo", "gumstix,omap3-overo", "ti,omap36xx", "ti,omap3";
compatible = "gumstix,omap3-overo-tobiduo", "gumstix,omap3-overo", "ti,omap3630", "ti,omap36xx", "ti,omap3";
};

2
arch/arm/boot/dts/omap3-pandora-1ghz.dts
View File

@ -16,7 +16,7 @@
/ {
model = "Pandora Handheld Console 1GHz";
compatible = "openpandora,omap3-pandora-1ghz", "ti,omap36xx", "ti,omap3";
compatible = "openpandora,omap3-pandora-1ghz", "ti,omap3630", "ti,omap36xx", "ti,omap3";
};
&omap3_pmx_core2 {

2
arch/arm/boot/dts/omap3-sbc-t3530.dts
View File

@ -8,7 +8,7 @@
/ {
model = "CompuLab SBC-T3530 with CM-T3530";
compatible = "compulab,omap3-sbc-t3530", "compulab,omap3-cm-t3530", "ti,omap34xx", "ti,omap3";
compatible = "compulab,omap3-sbc-t3530", "compulab,omap3-cm-t3530", "ti,omap3430", "ti,omap34xx", "ti,omap3";
aliases {
display0 = &dvi0;

2
arch/arm/boot/dts/omap3-sbc-t3730.dts
View File

@ -8,7 +8,7 @@
/ {
model = "CompuLab SBC-T3730 with CM-T3730";
compatible = "compulab,omap3-sbc-t3730", "compulab,omap3-cm-t3730", "ti,omap36xx", "ti,omap3";
compatible = "compulab,omap3-sbc-t3730", "compulab,omap3-cm-t3730", "ti,omap3630", "ti,omap36xx", "ti,omap3";
aliases {
display0 = &dvi0;

2
arch/arm/boot/dts/omap3-sniper.dts
View File

@ -9,7 +9,7 @@
/ {
model = "LG Optimus Black";
compatible = "lg,omap3-sniper", "ti,omap36xx", "ti,omap3";
compatible = "lg,omap3-sniper", "ti,omap3630", "ti,omap36xx", "ti,omap3";
cpus {
cpu@0 {

2
arch/arm/boot/dts/omap3-thunder.dts
View File

@ -8,7 +8,7 @@
/ {
model = "TI OMAP3 Thunder baseboard with TAO3530 SOM";
compatible = "technexion,omap3-thunder", "technexion,omap3-tao3530", "ti,omap34xx", "ti,omap3";
compatible = "technexion,omap3-thunder", "technexion,omap3-tao3530", "ti,omap3430", "ti,omap34xx", "ti,omap3";
};
&omap3_pmx_core {

2
arch/arm/boot/dts/omap3-zoom3.dts
View File

@ -9,7 +9,7 @@
/ {
model = "TI Zoom3";
compatible = "ti,omap3-zoom3", "ti,omap36xx", "ti,omap3";
compatible = "ti,omap3-zoom3", "ti,omap3630", "ti,omap36xx", "ti,omap3";
cpus {
cpu@0 {

2
arch/arm/boot/dts/omap3430-sdp.dts
View File

@ -8,7 +8,7 @@
/ {
model = "TI OMAP3430 SDP";
compatible = "ti,omap3430-sdp", "ti,omap3";
compatible = "ti,omap3430-sdp", "ti,omap3430", "ti,omap3";
memory@80000000 {
device_type = "memory";

66
arch/arm/boot/dts/omap34xx.dtsi
View File

@ -16,19 +16,67 @@
/ {
cpus {
cpu: cpu@0 {
/* OMAP343x/OMAP35xx variants OPP1-5 */
operating-points = <
/* kHz uV */
125000 975000
250000 1075000
500000 1200000
550000 1270000
600000 1350000
>;
/* OMAP343x/OMAP35xx variants OPP1-6 */
operating-points-v2 = <&cpu0_opp_table>;
clock-latency = <300000>; /* From legacy driver */
};
};
/* see Documentation/devicetree/bindings/opp/opp.txt */
cpu0_opp_table: opp-table {
compatible = "operating-points-v2-ti-cpu";
syscon = <&scm_conf>;
opp1-125000000 {
opp-hz = /bits/ 64 <125000000>;
/*
* we currently only select the max voltage from table
* Table 3-3 of the omap3530 Data sheet (SPRS507F).
* Format is: <target min max>
*/
opp-microvolt = <975000 975000 975000>;
/*
* first value is silicon revision bit mask
* second one 720MHz Device Identification bit mask
*/
opp-supported-hw = <0xffffffff 3>;
};
opp2-250000000 {
opp-hz = /bits/ 64 <250000000>;
opp-microvolt = <1075000 1075000 1075000>;
opp-supported-hw = <0xffffffff 3>;
opp-suspend;
};
opp3-500000000 {
opp-hz = /bits/ 64 <500000000>;
opp-microvolt = <1200000 1200000 1200000>;
opp-supported-hw = <0xffffffff 3>;
};
opp4-550000000 {
opp-hz = /bits/ 64 <550000000>;
opp-microvolt = <1275000 1275000 1275000>;
opp-supported-hw = <0xffffffff 3>;
};
opp5-600000000 {
opp-hz = /bits/ 64 <600000000>;
opp-microvolt = <1350000 1350000 1350000>;
opp-supported-hw = <0xffffffff 3>;
};
opp6-720000000 {
opp-hz = /bits/ 64 <720000000>;
opp-microvolt = <1350000 1350000 1350000>;
/* only high-speed grade omap3530 devices */
opp-supported-hw = <0xffffffff 2>;
turbo-mode;
};
};
ocp@68000000 {
omap3_pmx_core2: pinmux@480025d8 {
compatible = "ti,omap3-padconf", "pinctrl-single";

65
arch/arm/boot/dts/omap36xx.dtsi
View File

@ -19,18 +19,67 @@
};
cpus {
/* OMAP3630/OMAP37xx 'standard device' variants OPP50 to OPP130 */
/* OMAP3630/OMAP37xx variants OPP50 to OPP130 and OPP1G */
cpu: cpu@0 {
operating-points = <
/* kHz uV */
300000 1012500
600000 1200000
800000 1325000
>;
clock-latency = <300000>; /* From legacy driver */
operating-points-v2 = <&cpu0_opp_table>;
vbb-supply = <&abb_mpu_iva>;
clock-latency = <300000>; /* From omap-cpufreq driver */
};
};
/* see Documentation/devicetree/bindings/opp/opp.txt */
cpu0_opp_table: opp-table {
compatible = "operating-points-v2-ti-cpu";
syscon = <&scm_conf>;
opp50-300000000 {
opp-hz = /bits/ 64 <300000000>;
/*
* we currently only select the max voltage from table
* Table 4-19 of the DM3730 Data sheet (SPRS685B)
* Format is: cpu0-supply: <target min max>
* vbb-supply: <target min max>
*/
opp-microvolt = <1012500 1012500 1012500>,
<1012500 1012500 1012500>;
/*
* first value is silicon revision bit mask
* second one is "speed binned" bit mask
*/
opp-supported-hw = <0xffffffff 3>;
opp-suspend;
};
opp100-600000000 {
opp-hz = /bits/ 64 <600000000>;
opp-microvolt = <1200000 1200000 1200000>,
<1200000 1200000 1200000>;
opp-supported-hw = <0xffffffff 3>;
};
opp130-800000000 {
opp-hz = /bits/ 64 <800000000>;
opp-microvolt = <1325000 1325000 1325000>,
<1325000 1325000 1325000>;
opp-supported-hw = <0xffffffff 3>;
};
opp1g-1000000000 {
opp-hz = /bits/ 64 <1000000000>;
opp-microvolt = <1375000 1375000 1375000>,
<1375000 1375000 1375000>;
/* only on am/dm37x with speed-binned bit set */
opp-supported-hw = <0xffffffff 2>;
turbo-mode;
};
};
opp_supply_mpu_iva: opp_supply {
compatible = "ti,omap-opp-supply";
ti,absolute-max-voltage-uv = <1375000>;
};
ocp@68000000 {
uart4: serial@49042000 {
compatible = "ti,omap3-uart";

12
drivers/cpufreq/Kconfig.arm
View File

@ -49,14 +49,6 @@ config ARM_ARMADA_8K_CPUFREQ
If in doubt, say N.
# big LITTLE core layer and glue drivers
config ARM_BIG_LITTLE_CPUFREQ
tristate "Generic ARM big LITTLE CPUfreq driver"
depends on ARM_CPU_TOPOLOGY && HAVE_CLK
select PM_OPP
help
This enables the Generic CPUfreq driver for ARM big.LITTLE platforms.
config ARM_SCPI_CPUFREQ
tristate "SCPI based CPUfreq driver"
depends on ARM_SCPI_PROTOCOL && COMMON_CLK_SCPI
@ -69,7 +61,9 @@ config ARM_SCPI_CPUFREQ
config ARM_VEXPRESS_SPC_CPUFREQ
tristate "Versatile Express SPC based CPUfreq driver"
depends on ARM_BIG_LITTLE_CPUFREQ && ARCH_VEXPRESS_SPC
depends on ARM_CPU_TOPOLOGY && HAVE_CLK
depends on ARCH_VEXPRESS_SPC
select PM_OPP
help
This add the CPUfreq driver support for Versatile Express
big.LITTLE platforms using SPC for power management.

2
drivers/cpufreq/Makefile
View File

@ -47,8 +47,6 @@ obj-$(CONFIG_X86_SFI_CPUFREQ) += sfi-cpufreq.o
##################################################################################
# ARM SoC drivers
obj-$(CONFIG_ARM_BIG_LITTLE_CPUFREQ) += arm_big_little.o
obj-$(CONFIG_ARM_ARMADA_37XX_CPUFREQ) += armada-37xx-cpufreq.o
obj-$(CONFIG_ARM_ARMADA_8K_CPUFREQ) += armada-8k-cpufreq.o
obj-$(CONFIG_ARM_BRCMSTB_AVS_CPUFREQ) += brcmstb-avs-cpufreq.o

658
drivers/cpufreq/arm_big_little.c
View File

@ -1,658 +0,0 @@
/*
* ARM big.LITTLE Platforms CPUFreq support
*
* Copyright (C) 2013 ARM Ltd.
* Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
*
* Copyright (C) 2013 Linaro.
* Viresh Kumar <viresh.kumar@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/clk.h>
#include <linux/cpu.h>
#include <linux/cpufreq.h>
#include <linux/cpumask.h>
#include <linux/cpu_cooling.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of_platform.h>
#include <linux/pm_opp.h>
#include <linux/slab.h>
#include <linux/topology.h>
#include <linux/types.h>
#include "arm_big_little.h"
/* Currently we support only two clusters */
#define A15_CLUSTER 0
#define A7_CLUSTER 1
#define MAX_CLUSTERS 2
#ifdef CONFIG_BL_SWITCHER
#include <asm/bL_switcher.h>
static bool bL_switching_enabled;
#define is_bL_switching_enabled() bL_switching_enabled
#define set_switching_enabled(x) (bL_switching_enabled = (x))
#else
#define is_bL_switching_enabled() false
#define set_switching_enabled(x) do { } while (0)
#define bL_switch_request(...) do { } while (0)
#define bL_switcher_put_enabled() do { } while (0)
#define bL_switcher_get_enabled() do { } while (0)
#endif
#define ACTUAL_FREQ(cluster, freq) ((cluster == A7_CLUSTER) ? freq << 1 : freq)
#define VIRT_FREQ(cluster, freq) ((cluster == A7_CLUSTER) ? freq >> 1 : freq)
static struct thermal_cooling_device *cdev[MAX_CLUSTERS];
static const struct cpufreq_arm_bL_ops *arm_bL_ops;
static struct clk *clk[MAX_CLUSTERS];
static struct cpufreq_frequency_table *freq_table[MAX_CLUSTERS + 1];
static atomic_t cluster_usage[MAX_CLUSTERS + 1];
static unsigned int clk_big_min; /* (Big) clock frequencies */
static unsigned int clk_little_max; /* Maximum clock frequency (Little) */
static DEFINE_PER_CPU(unsigned int, physical_cluster);
static DEFINE_PER_CPU(unsigned int, cpu_last_req_freq);
static struct mutex cluster_lock[MAX_CLUSTERS];
static inline int raw_cpu_to_cluster(int cpu)
{
return topology_physical_package_id(cpu);
}
static inline int cpu_to_cluster(int cpu)
{
return is_bL_switching_enabled() ?
MAX_CLUSTERS : raw_cpu_to_cluster(cpu);
}
static unsigned int find_cluster_maxfreq(int cluster)
{
int j;
u32 max_freq = 0, cpu_freq;
for_each_online_cpu(j) {
cpu_freq = per_cpu(cpu_last_req_freq, j);
if ((cluster == per_cpu(physical_cluster, j)) &&
(max_freq < cpu_freq))
max_freq = cpu_freq;
}
pr_debug("%s: cluster: %d, max freq: %d\n", __func__, cluster,
max_freq);
return max_freq;
}
static unsigned int clk_get_cpu_rate(unsigned int cpu)
{
u32 cur_cluster = per_cpu(physical_cluster, cpu);
u32 rate = clk_get_rate(clk[cur_cluster]) / 1000;
/* For switcher we use virtual A7 clock rates */
if (is_bL_switching_enabled())
rate = VIRT_FREQ(cur_cluster, rate);
pr_debug("%s: cpu: %d, cluster: %d, freq: %u\n", __func__, cpu,
cur_cluster, rate);
return rate;
}
static unsigned int bL_cpufreq_get_rate(unsigned int cpu)
{
if (is_bL_switching_enabled()) {
pr_debug("%s: freq: %d\n", __func__, per_cpu(cpu_last_req_freq,
cpu));
return per_cpu(cpu_last_req_freq, cpu);
} else {
return clk_get_cpu_rate(cpu);
}
}
static unsigned int
bL_cpufreq_set_rate(u32 cpu, u32 old_cluster, u32 new_cluster, u32 rate)
{
u32 new_rate, prev_rate;
int ret;
bool bLs = is_bL_switching_enabled();
mutex_lock(&cluster_lock[new_cluster]);
if (bLs) {
prev_rate = per_cpu(cpu_last_req_freq, cpu);
per_cpu(cpu_last_req_freq, cpu) = rate;
per_cpu(physical_cluster, cpu) = new_cluster;
new_rate = find_cluster_maxfreq(new_cluster);
new_rate = ACTUAL_FREQ(new_cluster, new_rate);
} else {
new_rate = rate;
}
pr_debug("%s: cpu: %d, old cluster: %d, new cluster: %d, freq: %d\n",
__func__, cpu, old_cluster, new_cluster, new_rate);
ret = clk_set_rate(clk[new_cluster], new_rate * 1000);
if (!ret) {
/*
* FIXME: clk_set_rate hasn't returned an error here however it
* may be that clk_change_rate failed due to hardware or
* firmware issues and wasn't able to report that due to the
* current design of the clk core layer. To work around this
* problem we will read back the clock rate and check it is
* correct. This needs to be removed once clk core is fixed.
*/
if (clk_get_rate(clk[new_cluster]) != new_rate * 1000)
ret = -EIO;
}
if (WARN_ON(ret)) {
pr_err("clk_set_rate failed: %d, new cluster: %d\n", ret,
new_cluster);
if (bLs) {
per_cpu(cpu_last_req_freq, cpu) = prev_rate;
per_cpu(physical_cluster, cpu) = old_cluster;
}
mutex_unlock(&cluster_lock[new_cluster]);
return ret;
}
mutex_unlock(&cluster_lock[new_cluster]);
/* Recalc freq for old cluster when switching clusters */
if (old_cluster != new_cluster) {
pr_debug("%s: cpu: %d, old cluster: %d, new cluster: %d\n",
__func__, cpu, old_cluster, new_cluster);
/* Switch cluster */
bL_switch_request(cpu, new_cluster);
mutex_lock(&cluster_lock[old_cluster]);
/* Set freq of old cluster if there are cpus left on it */
new_rate = find_cluster_maxfreq(old_cluster);
new_rate = ACTUAL_FREQ(old_cluster, new_rate);
if (new_rate) {
pr_debug("%s: Updating rate of old cluster: %d, to freq: %d\n",
__func__, old_cluster, new_rate);
if (clk_set_rate(clk[old_cluster], new_rate * 1000))
pr_err("%s: clk_set_rate failed: %d, old cluster: %d\n",
__func__, ret, old_cluster);
}
mutex_unlock(&cluster_lock[old_cluster]);
}
return 0;
}
/* Set clock frequency */
static int bL_cpufreq_set_target(struct cpufreq_policy *policy,
unsigned int index)
{
u32 cpu = policy->cpu, cur_cluster, new_cluster, actual_cluster;
unsigned int freqs_new;
int ret;
cur_cluster = cpu_to_cluster(cpu);
new_cluster = actual_cluster = per_cpu(physical_cluster, cpu);
freqs_new = freq_table[cur_cluster][index].frequency;
if (is_bL_switching_enabled()) {
if ((actual_cluster == A15_CLUSTER) &&
(freqs_new < clk_big_min)) {
new_cluster = A7_CLUSTER;
} else if ((actual_cluster == A7_CLUSTER) &&
(freqs_new > clk_little_max)) {
new_cluster = A15_CLUSTER;
}
}
ret = bL_cpufreq_set_rate(cpu, actual_cluster, new_cluster, freqs_new);
if (!ret) {
arch_set_freq_scale(policy->related_cpus, freqs_new,
policy->cpuinfo.max_freq);
}
return ret;
}
static inline u32 get_table_count(struct cpufreq_frequency_table *table)
{
int count;
for (count = 0; table[count].frequency != CPUFREQ_TABLE_END; count++)
;
return count;
}
/* get the minimum frequency in the cpufreq_frequency_table */
static inline u32 get_table_min(struct cpufreq_frequency_table *table)
{
struct cpufreq_frequency_table *pos;
uint32_t min_freq = ~0;
cpufreq_for_each_entry(pos, table)
if (pos->frequency < min_freq)
min_freq = pos->frequency;
return min_freq;
}
/* get the maximum frequency in the cpufreq_frequency_table */
static inline u32 get_table_max(struct cpufreq_frequency_table *table)
{
struct cpufreq_frequency_table *pos;
uint32_t max_freq = 0;
cpufreq_for_each_entry(pos, table)
if (pos->frequency > max_freq)
max_freq = pos->frequency;
return max_freq;
}
static int merge_cluster_tables(void)
{
int i, j, k = 0, count = 1;
struct cpufreq_frequency_table *table;
for (i = 0; i < MAX_CLUSTERS; i++)
count += get_table_count(freq_table[i]);
table = kcalloc(count, sizeof(*table), GFP_KERNEL);
if (!table)
return -ENOMEM;
freq_table[MAX_CLUSTERS] = table;
/* Add in reverse order to get freqs in increasing order */
for (i = MAX_CLUSTERS - 1; i >= 0; i--) {
for (j = 0; freq_table[i][j].frequency != CPUFREQ_TABLE_END;
j++) {
table[k].frequency = VIRT_FREQ(i,
freq_table[i][j].frequency);
pr_debug("%s: index: %d, freq: %d\n", __func__, k,
table[k].frequency);
k++;
}
}
table[k].driver_data = k;
table[k].frequency = CPUFREQ_TABLE_END;
pr_debug("%s: End, table: %p, count: %d\n", __func__, table, k);
return 0;
}
static void _put_cluster_clk_and_freq_table(struct device *cpu_dev,
const struct cpumask *cpumask)
{
u32 cluster = raw_cpu_to_cluster(cpu_dev->id);
if (!freq_table[cluster])
return;
clk_put(clk[cluster]);
dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table[cluster]);
if (arm_bL_ops->free_opp_table)
arm_bL_ops->free_opp_table(cpumask);
dev_dbg(cpu_dev, "%s: cluster: %d\n", __func__, cluster);
}
static void put_cluster_clk_and_freq_table(struct device *cpu_dev,
const struct cpumask *cpumask)
{
u32 cluster = cpu_to_cluster(cpu_dev->id);
int i;
if (atomic_dec_return(&cluster_usage[cluster]))
return;
if (cluster < MAX_CLUSTERS)
return _put_cluster_clk_and_freq_table(cpu_dev, cpumask);
for_each_present_cpu(i) {
struct device *cdev = get_cpu_device(i);
if (!cdev) {
pr_err("%s: failed to get cpu%d device\n", __func__, i);
return;
}
_put_cluster_clk_and_freq_table(cdev, cpumask);
}
/* free virtual table */
kfree(freq_table[cluster]);
}
static int _get_cluster_clk_and_freq_table(struct device *cpu_dev,
const struct cpumask *cpumask)
{
u32 cluster = raw_cpu_to_cluster(cpu_dev->id);
int ret;
if (freq_table[cluster])
return 0;
ret = arm_bL_ops->init_opp_table(cpumask);
if (ret) {
dev_err(cpu_dev, "%s: init_opp_table failed, cpu: %d, err: %d\n",
__func__, cpu_dev->id, ret);
goto out;
}
ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table[cluster]);
if (ret) {
dev_err(cpu_dev, "%s: failed to init cpufreq table, cpu: %d, err: %d\n",
__func__, cpu_dev->id, ret);
goto free_opp_table;
}
clk[cluster] = clk_get(cpu_dev, NULL);
if (!IS_ERR(clk[cluster])) {
dev_dbg(cpu_dev, "%s: clk: %p & freq table: %p, cluster: %d\n",
__func__, clk[cluster], freq_table[cluster],
cluster);
return 0;
}
dev_err(cpu_dev, "%s: Failed to get clk for cpu: %d, cluster: %d\n",
__func__, cpu_dev->id, cluster);
ret = PTR_ERR(clk[cluster]);
dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table[cluster]);
free_opp_table:
if (arm_bL_ops->free_opp_table)
arm_bL_ops->free_opp_table(cpumask);
out:
dev_err(cpu_dev, "%s: Failed to get data for cluster: %d\n", __func__,
cluster);
return ret;
}
static int get_cluster_clk_and_freq_table(struct device *cpu_dev,
const struct cpumask *cpumask)
{
u32 cluster = cpu_to_cluster(cpu_dev->id);
int i, ret;
if (atomic_inc_return(&cluster_usage[cluster]) != 1)
return 0;
if (cluster < MAX_CLUSTERS) {
ret = _get_cluster_clk_and_freq_table(cpu_dev, cpumask);
if (ret)
atomic_dec(&cluster_usage[cluster]);
return ret;
}
/*
* Get data for all clusters and fill virtual cluster with a merge of
* both
*/
for_each_present_cpu(i) {
struct device *cdev = get_cpu_device(i);
if (!cdev) {
pr_err("%s: failed to get cpu%d device\n", __func__, i);
return -ENODEV;
}
ret = _get_cluster_clk_and_freq_table(cdev, cpumask);
if (ret)
goto put_clusters;
}
ret = merge_cluster_tables();
if (ret)
goto put_clusters;
/* Assuming 2 cluster, set clk_big_min and clk_little_max */
clk_big_min = get_table_min(freq_table[0]);
clk_little_max = VIRT_FREQ(1, get_table_max(freq_table[1]));
pr_debug("%s: cluster: %d, clk_big_min: %d, clk_little_max: %d\n",
__func__, cluster, clk_big_min, clk_little_max);
return 0;
put_clusters:
for_each_present_cpu(i) {
struct device *cdev = get_cpu_device(i);
if (!cdev) {
pr_err("%s: failed to get cpu%d device\n", __func__, i);
return -ENODEV;
}
_put_cluster_clk_and_freq_table(cdev, cpumask);
}
atomic_dec(&cluster_usage[cluster]);
return ret;
}
/* Per-CPU initialization */
static int bL_cpufreq_init(struct cpufreq_policy *policy)
{
u32 cur_cluster = cpu_to_cluster(policy->cpu);
struct device *cpu_dev;
int ret;
cpu_dev = get_cpu_device(policy->cpu);
if (!cpu_dev) {
pr_err("%s: failed to get cpu%d device\n", __func__,
policy->cpu);
return -ENODEV;
}
if (cur_cluster < MAX_CLUSTERS) {
int cpu;
cpumask_copy(policy->cpus, topology_core_cpumask(policy->cpu));
for_each_cpu(cpu, policy->cpus)
per_cpu(physical_cluster, cpu) = cur_cluster;
} else {
/* Assumption: during init, we are always running on A15 */
per_cpu(physical_cluster, policy->cpu) = A15_CLUSTER;
}
ret = get_cluster_clk_and_freq_table(cpu_dev, policy->cpus);
if (ret)
return ret;
policy->freq_table = freq_table[cur_cluster];
policy->cpuinfo.transition_latency =
arm_bL_ops->get_transition_latency(cpu_dev);
dev_pm_opp_of_register_em(policy->cpus);
if (is_bL_switching_enabled())
per_cpu(cpu_last_req_freq, policy->cpu) = clk_get_cpu_rate(policy->cpu);
dev_info(cpu_dev, "%s: CPU %d initialized\n", __func__, policy->cpu);
return 0;
}
static int bL_cpufreq_exit(struct cpufreq_policy *policy)
{
struct device *cpu_dev;
int cur_cluster = cpu_to_cluster(policy->cpu);
if (cur_cluster < MAX_CLUSTERS) {
cpufreq_cooling_unregister(cdev[cur_cluster]);
cdev[cur_cluster] = NULL;
}
cpu_dev = get_cpu_device(policy->cpu);
if (!cpu_dev) {
pr_err("%s: failed to get cpu%d device\n", __func__,
policy->cpu);
return -ENODEV;
}
put_cluster_clk_and_freq_table(cpu_dev, policy->related_cpus);
dev_dbg(cpu_dev, "%s: Exited, cpu: %d\n", __func__, policy->cpu);
return 0;
}
static void bL_cpufreq_ready(struct cpufreq_policy *policy)
{
int cur_cluster = cpu_to_cluster(policy->cpu);
/* Do not register a cpu_cooling device if we are in IKS mode */
if (cur_cluster >= MAX_CLUSTERS)
return;
cdev[cur_cluster] = of_cpufreq_cooling_register(policy);
}
static struct cpufreq_driver bL_cpufreq_driver = {
.name = "arm-big-little",
.flags = CPUFREQ_STICKY |
CPUFREQ_HAVE_GOVERNOR_PER_POLICY |
CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = bL_cpufreq_set_target,
.get = bL_cpufreq_get_rate,
.init = bL_cpufreq_init,
.exit = bL_cpufreq_exit,
.ready = bL_cpufreq_ready,
.attr = cpufreq_generic_attr,
};
#ifdef CONFIG_BL_SWITCHER
static int bL_cpufreq_switcher_notifier(struct notifier_block *nfb,
unsigned long action, void *_arg)
{
pr_debug("%s: action: %ld\n", __func__, action);
switch (action) {
case BL_NOTIFY_PRE_ENABLE:
case BL_NOTIFY_PRE_DISABLE:
cpufreq_unregister_driver(&bL_cpufreq_driver);
break;
case BL_NOTIFY_POST_ENABLE:
set_switching_enabled(true);
cpufreq_register_driver(&bL_cpufreq_driver);
break;
case BL_NOTIFY_POST_DISABLE:
set_switching_enabled(false);
cpufreq_register_driver(&bL_cpufreq_driver);
break;
default:
return NOTIFY_DONE;
}
return NOTIFY_OK;
}
static struct notifier_block bL_switcher_notifier = {
.notifier_call = bL_cpufreq_switcher_notifier,
};
static int __bLs_register_notifier(void)
{
return bL_switcher_register_notifier(&bL_switcher_notifier);
}
static int __bLs_unregister_notifier(void)
{
return bL_switcher_unregister_notifier(&bL_switcher_notifier);
}
#else
static int __bLs_register_notifier(void) { return 0; }
static int __bLs_unregister_notifier(void) { return 0; }
#endif
int bL_cpufreq_register(const struct cpufreq_arm_bL_ops *ops)
{
int ret, i;
if (arm_bL_ops) {
pr_debug("%s: Already registered: %s, exiting\n", __func__,
arm_bL_ops->name);
return -EBUSY;
}
if (!ops || !strlen(ops->name) || !ops->init_opp_table ||
!ops->get_transition_latency) {
pr_err("%s: Invalid arm_bL_ops, exiting\n", __func__);
return -ENODEV;
}
arm_bL_ops = ops;
set_switching_enabled(bL_switcher_get_enabled());
for (i = 0; i < MAX_CLUSTERS; i++)
mutex_init(&cluster_lock[i]);
ret = cpufreq_register_driver(&bL_cpufreq_driver);
if (ret) {
pr_info("%s: Failed registering platform driver: %s, err: %d\n",
__func__, ops->name, ret);
arm_bL_ops = NULL;
} else {
ret = __bLs_register_notifier();
if (ret) {
cpufreq_unregister_driver(&bL_cpufreq_driver);
arm_bL_ops = NULL;
} else {
pr_info("%s: Registered platform driver: %s\n",
__func__, ops->name);
}
}
bL_switcher_put_enabled();
return ret;
}
EXPORT_SYMBOL_GPL(bL_cpufreq_register);
void bL_cpufreq_unregister(const struct cpufreq_arm_bL_ops *ops)
{
if (arm_bL_ops != ops) {
pr_err("%s: Registered with: %s, can't unregister, exiting\n",
__func__, arm_bL_ops->name);
return;
}
bL_switcher_get_enabled();
__bLs_unregister_notifier();
cpufreq_unregister_driver(&bL_cpufreq_driver);
bL_switcher_put_enabled();
pr_info("%s: Un-registered platform driver: %s\n", __func__,
arm_bL_ops->name);
arm_bL_ops = NULL;
}
EXPORT_SYMBOL_GPL(bL_cpufreq_unregister);
MODULE_AUTHOR("Viresh Kumar <viresh.kumar@linaro.org>");
MODULE_DESCRIPTION("Generic ARM big LITTLE cpufreq driver");
MODULE_LICENSE("GPL v2");

43
drivers/cpufreq/arm_big_little.h
View File

@ -1,43 +0,0 @@
/*
* ARM big.LITTLE platform's CPUFreq header file
*
* Copyright (C) 2013 ARM Ltd.
* Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
*
* Copyright (C) 2013 Linaro.
* Viresh Kumar <viresh.kumar@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef CPUFREQ_ARM_BIG_LITTLE_H
#define CPUFREQ_ARM_BIG_LITTLE_H
#include <linux/cpufreq.h>
#include <linux/device.h>
#include <linux/types.h>
struct cpufreq_arm_bL_ops {
char name[CPUFREQ_NAME_LEN];
/*
* This must set opp table for cpu_dev in a similar way as done by
* dev_pm_opp_of_add_table().
*/
int (*init_opp_table)(const struct cpumask *cpumask);
/* Optional */
int (*get_transition_latency)(struct device *cpu_dev);
void (*free_opp_table)(const struct cpumask *cpumask);
};
int bL_cpufreq_register(const struct cpufreq_arm_bL_ops *ops);
void bL_cpufreq_unregister(const struct cpufreq_arm_bL_ops *ops);
#endif /* CPUFREQ_ARM_BIG_LITTLE_H */

2
drivers/cpufreq/cpufreq-dt-platdev.c
View File

@ -86,7 +86,6 @@ static const struct of_device_id whitelist[] __initconst = {
{ .compatible = "st-ericsson,u9540", },
{ .compatible = "ti,omap2", },
{ .compatible = "ti,omap3", },
{ .compatible = "ti,omap4", },
{ .compatible = "ti,omap5", },
@ -137,6 +136,7 @@ static const struct of_device_id blacklist[] __initconst = {
{ .compatible = "ti,am33xx", },
{ .compatible = "ti,am43", },
{ .compatible = "ti,dra7", },
{ .compatible = "ti,omap3", },
{ }
};

18
drivers/cpufreq/cpufreq.c
View File

@ -933,6 +933,9 @@ static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf)
struct freq_attr *fattr = to_attr(attr);
ssize_t ret;
if (!fattr->show)
return -EIO;
down_read(&policy->rwsem);
ret = fattr->show(policy, buf);
up_read(&policy->rwsem);
@ -947,6 +950,9 @@ static ssize_t store(struct kobject *kobj, struct attribute *attr,
struct freq_attr *fattr = to_attr(attr);
ssize_t ret = -EINVAL;
if (!fattr->store)
return -EIO;
/*
* cpus_read_trylock() is used here to work around a circular lock
* dependency problem with respect to the cpufreq_register_driver().
@ -2385,7 +2391,10 @@ int cpufreq_set_policy(struct cpufreq_policy *policy,
new_policy->min = freq_qos_read_value(&policy->constraints, FREQ_QOS_MIN);
new_policy->max = freq_qos_read_value(&policy->constraints, FREQ_QOS_MAX);
/* verify the cpu speed can be set within this limit */
/*
* Verify that the CPU speed can be set within these limits and make sure
* that min <= max.
*/
ret = cpufreq_driver->verify(new_policy);
if (ret)
return ret;
@ -2628,6 +2637,13 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
if (cpufreq_disabled())
return -ENODEV;
/*
* The cpufreq core depends heavily on the availability of device
* structure, make sure they are available before proceeding further.
*/
if (!get_cpu_device(0))
return -EPROBE_DEFER;
if (!driver_data || !driver_data->verify || !driver_data->init ||
!(driver_data->setpolicy || driver_data->target_index ||
driver_data->target) ||

18
drivers/cpufreq/imx-cpufreq-dt.c
View File

@ -44,19 +44,19 @@ static int imx_cpufreq_dt_probe(struct platform_device *pdev)
mkt_segment = (cell_value & OCOTP_CFG3_MKT_SEGMENT_MASK) >> OCOTP_CFG3_MKT_SEGMENT_SHIFT;
/*
* Early samples without fuses written report "0 0" which means
* consumer segment and minimum speed grading.
*
* According to datasheet minimum speed grading is not supported for
* consumer parts so clamp to 1 to avoid warning for "no OPPs"
* Early samples without fuses written report "0 0" which may NOT
* match any OPP defined in DT. So clamp to minimum OPP defined in
* DT to avoid warning for "no OPPs".
*
* Applies to i.MX8M series SoCs.
*/
if (mkt_segment == 0 && speed_grade == 0 && (
of_machine_is_compatible("fsl,imx8mm") ||
of_machine_is_compatible("fsl,imx8mn") ||
of_machine_is_compatible("fsl,imx8mq")))
if (mkt_segment == 0 && speed_grade == 0) {
if (of_machine_is_compatible("fsl,imx8mm") ||
of_machine_is_compatible("fsl,imx8mq"))
speed_grade = 1;
if (of_machine_is_compatible("fsl,imx8mn"))
speed_grade = 0xb;
}
supported_hw[0] = BIT(speed_grade);
supported_hw[1] = BIT(mkt_segment);

30
drivers/cpufreq/intel_pstate.c
View File

@ -2662,21 +2662,21 @@ enum {
/* Hardware vendor-specific info that has its own power management modes */
static struct acpi_platform_list plat_info[] __initdata = {
{"HP ", "ProLiant", 0, ACPI_SIG_FADT, all_versions, 0, PSS},
{"ORACLE", "X4-2 ", 0, ACPI_SIG_FADT, all_versions, 0, PPC},
{"ORACLE", "X4-2L ", 0, ACPI_SIG_FADT, all_versions, 0, PPC},
{"ORACLE", "X4-2B ", 0, ACPI_SIG_FADT, all_versions, 0, PPC},
{"ORACLE", "X3-2 ", 0, ACPI_SIG_FADT, all_versions, 0, PPC},
{"ORACLE", "X3-2L ", 0, ACPI_SIG_FADT, all_versions, 0, PPC},
{"ORACLE", "X3-2B ", 0, ACPI_SIG_FADT, all_versions, 0, PPC},
{"ORACLE", "X4470M2 ", 0, ACPI_SIG_FADT, all_versions, 0, PPC},
{"ORACLE", "X4270M3 ", 0, ACPI_SIG_FADT, all_versions, 0, PPC},
{"ORACLE", "X4270M2 ", 0, ACPI_SIG_FADT, all_versions, 0, PPC},
{"ORACLE", "X4170M2 ", 0, ACPI_SIG_FADT, all_versions, 0, PPC},
{"ORACLE", "X4170 M3", 0, ACPI_SIG_FADT, all_versions, 0, PPC},
{"ORACLE", "X4275 M3", 0, ACPI_SIG_FADT, all_versions, 0, PPC},
{"ORACLE", "X6-2 ", 0, ACPI_SIG_FADT, all_versions, 0, PPC},
{"ORACLE", "Sudbury ", 0, ACPI_SIG_FADT, all_versions, 0, PPC},
{"HP ", "ProLiant", 0, ACPI_SIG_FADT, all_versions, NULL, PSS},
{"ORACLE", "X4-2 ", 0, ACPI_SIG_FADT, all_versions, NULL, PPC},
{"ORACLE", "X4-2L ", 0, ACPI_SIG_FADT, all_versions, NULL, PPC},
{"ORACLE", "X4-2B ", 0, ACPI_SIG_FADT, all_versions, NULL, PPC},
{"ORACLE", "X3-2 ", 0, ACPI_SIG_FADT, all_versions, NULL, PPC},
{"ORACLE", "X3-2L ", 0, ACPI_SIG_FADT, all_versions, NULL, PPC},
{"ORACLE", "X3-2B ", 0, ACPI_SIG_FADT, all_versions, NULL, PPC},
{"ORACLE", "X4470M2 ", 0, ACPI_SIG_FADT, all_versions, NULL, PPC},
{"ORACLE", "X4270M3 ", 0, ACPI_SIG_FADT, all_versions, NULL, PPC},
{"ORACLE", "X4270M2 ", 0, ACPI_SIG_FADT, all_versions, NULL, PPC},
{"ORACLE", "X4170M2 ", 0, ACPI_SIG_FADT, all_versions, NULL, PPC},
{"ORACLE", "X4170 M3", 0, ACPI_SIG_FADT, all_versions, NULL, PPC},
{"ORACLE", "X4275 M3", 0, ACPI_SIG_FADT, all_versions, NULL, PPC},
{"ORACLE", "X6-2 ", 0, ACPI_SIG_FADT, all_versions, NULL, PPC},
{"ORACLE", "Sudbury ", 0, ACPI_SIG_FADT, all_versions, NULL, PPC},
{ } /* End */
};

17
drivers/cpufreq/powernv-cpufreq.c
View File

@ -1041,9 +1041,14 @@ static struct cpufreq_driver powernv_cpufreq_driver = {
static int init_chip_info(void)
{
unsigned int chip[256];
unsigned int *chip;
unsigned int cpu, i;
unsigned int prev_chip_id = UINT_MAX;
int ret = 0;
chip = kcalloc(num_possible_cpus(), sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
for_each_possible_cpu(cpu) {
unsigned int id = cpu_to_chip_id(cpu);
@ -1055,8 +1060,10 @@ static int init_chip_info(void)
}
chips = kcalloc(nr_chips, sizeof(struct chip), GFP_KERNEL);
if (!chips)
return -ENOMEM;
if (!chips) {
ret = -ENOMEM;
goto free_and_return;
}
for (i = 0; i < nr_chips; i++) {
chips[i].id = chip[i];
@ -1066,7 +1073,9 @@ static int init_chip_info(void)
per_cpu(chip_info, cpu) = &chips[i];
}
return 0;
free_and_return:
kfree(chip);
return ret;
}
static inline void clean_chip_info(void)

7
drivers/cpufreq/s3c64xx-cpufreq.c
View File

@ -19,7 +19,6 @@
static struct regulator *vddarm;
static unsigned long regulator_latency;
#ifdef CONFIG_CPU_S3C6410
struct s3c64xx_dvfs {
unsigned int vddarm_min;
unsigned int vddarm_max;
@ -48,7 +47,6 @@ static struct cpufreq_frequency_table s3c64xx_freq_table[] = {
{ 0, 4, 800000 },
{ 0, 0, CPUFREQ_TABLE_END },
};
#endif
static int s3c64xx_cpufreq_set_target(struct cpufreq_policy *policy,
unsigned int index)
@ -149,11 +147,6 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
if (policy->cpu != 0)
return -EINVAL;
if (s3c64xx_freq_table == NULL) {
pr_err("No frequency information for this CPU\n");
return -ENODEV;
}
policy->clk = clk_get(NULL, "armclk");
if (IS_ERR(policy->clk)) {
pr_err("Unable to obtain ARMCLK: %ld\n",

2
drivers/cpufreq/scpi-cpufreq.c
View File

@ -1,8 +1,6 @@
/*
* System Control and Power Interface (SCPI) based CPUFreq Interface driver
*
* It provides necessary ops to arm_big_little cpufreq driver.
*
* Copyright (C) 2015 ARM Ltd.
* Sudeep Holla <sudeep.holla@arm.com>
*

21
drivers/cpufreq/sun50i-cpufreq-nvmem.c
View File

@ -25,7 +25,7 @@
static struct platform_device *cpufreq_dt_pdev, *sun50i_cpufreq_pdev;
/**
* sun50i_cpufreq_get_efuse() - Parse and return efuse value present on SoC
* sun50i_cpufreq_get_efuse() - Determine speed grade from efuse value
* @versions: Set to the value parsed from efuse
*
* Returns 0 if success.
@ -69,21 +69,16 @@ static int sun50i_cpufreq_get_efuse(u32 *versions)
return PTR_ERR(speedbin);
efuse_value = (*speedbin >> NVMEM_SHIFT) & NVMEM_MASK;
switch (efuse_value) {
case 0b0001:
*versions = 1;
break;
case 0b0011:
*versions = 2;
break;
default:
/*
* For other situations, we treat it as bin0.
* This vf table can be run for any good cpu.
* We treat unexpected efuse values as if the SoC was from
* the slowest bin. Expected efuse values are 1-3, slowest
* to fastest.
*/
if (efuse_value >= 1 && efuse_value <= 3)
*versions = efuse_value - 1;
else
*versions = 0;
break;
}
kfree(speedbin);
return 0;

119
drivers/cpufreq/ti-cpufreq.c
View File

@ -31,11 +31,17 @@
#define DRA7_EFUSE_OD_MPU_OPP BIT(1)
#define DRA7_EFUSE_HIGH_MPU_OPP BIT(2)
#define OMAP3_CONTROL_DEVICE_STATUS 0x4800244C
#define OMAP3_CONTROL_IDCODE 0x4830A204
#define OMAP34xx_ProdID_SKUID 0x4830A20C
#define OMAP3_SYSCON_BASE (0x48000000 + 0x2000 + 0x270)
#define VERSION_COUNT 2
struct ti_cpufreq_data;
struct ti_cpufreq_soc_data {
const char * const *reg_names;
unsigned long (*efuse_xlate)(struct ti_cpufreq_data *opp_data,
unsigned long efuse);
unsigned long efuse_fallback;
@ -85,6 +91,13 @@ static unsigned long dra7_efuse_xlate(struct ti_cpufreq_data *opp_data,
return calculated_efuse;
}
static unsigned long omap3_efuse_xlate(struct ti_cpufreq_data *opp_data,
unsigned long efuse)
{
/* OPP enable bit ("Speed Binned") */
return BIT(efuse);
}
static struct ti_cpufreq_soc_data am3x_soc_data = {
.efuse_xlate = amx3_efuse_xlate,
.efuse_fallback = AM33XX_800M_ARM_MPU_MAX_FREQ,
@ -112,6 +125,74 @@ static struct ti_cpufreq_soc_data dra7_soc_data = {
.multi_regulator = true,
};
/*
* OMAP35x TRM (SPRUF98K):
* CONTROL_IDCODE (0x4830 A204) describes Silicon revisions.
* Control OMAP Status Register 15:0 (Address 0x4800 244C)
* to separate between omap3503, omap3515, omap3525, omap3530
* and feature presence.
* There are encodings for versions limited to 400/266MHz
* but we ignore.
* Not clear if this also holds for omap34xx.
* some eFuse values e.g. CONTROL_FUSE_OPP1_VDD1
* are stored in the SYSCON register range
* Register 0x4830A20C [ProdID.SKUID] [0:3]
* 0x0 for normal 600/430MHz device.
* 0x8 for 720/520MHz device.
* Not clear what omap34xx value is.
*/
static struct ti_cpufreq_soc_data omap34xx_soc_data = {
.efuse_xlate = omap3_efuse_xlate,
.efuse_offset = OMAP34xx_ProdID_SKUID - OMAP3_SYSCON_BASE,
.efuse_shift = 3,
.efuse_mask = BIT(3),
.rev_offset = OMAP3_CONTROL_IDCODE - OMAP3_SYSCON_BASE,
.multi_regulator = false,
};
/*
* AM/DM37x TRM (SPRUGN4M)
* CONTROL_IDCODE (0x4830 A204) describes Silicon revisions.
* Control Device Status Register 15:0 (Address 0x4800 244C)
* to separate between am3703, am3715, dm3725, dm3730
* and feature presence.
* Speed Binned = Bit 9
* 0 800/600 MHz
* 1 1000/800 MHz
* some eFuse values e.g. CONTROL_FUSE_OPP 1G_VDD1
* are stored in the SYSCON register range.
* There is no 0x4830A20C [ProdID.SKUID] register (exists but
* seems to always read as 0).
*/
static const char * const omap3_reg_names[] = {"cpu0", "vbb"};
static struct ti_cpufreq_soc_data omap36xx_soc_data = {
.reg_names = omap3_reg_names,
.efuse_xlate = omap3_efuse_xlate,
.efuse_offset = OMAP3_CONTROL_DEVICE_STATUS - OMAP3_SYSCON_BASE,
.efuse_shift = 9,
.efuse_mask = BIT(9),
.rev_offset = OMAP3_CONTROL_IDCODE - OMAP3_SYSCON_BASE,
.multi_regulator = true,
};
/*
* AM3517 is quite similar to AM/DM37x except that it has no
* high speed grade eFuse and no abb ldo
*/
static struct ti_cpufreq_soc_data am3517_soc_data = {
.efuse_xlate = omap3_efuse_xlate,
.efuse_offset = OMAP3_CONTROL_DEVICE_STATUS - OMAP3_SYSCON_BASE,
.efuse_shift = 0,
.efuse_mask = 0,
.rev_offset = OMAP3_CONTROL_IDCODE - OMAP3_SYSCON_BASE,
.multi_regulator = false,
};
/**
* ti_cpufreq_get_efuse() - Parse and return efuse value present on SoC
* @opp_data: pointer to ti_cpufreq_data context
@ -128,7 +209,17 @@ static int ti_cpufreq_get_efuse(struct ti_cpufreq_data *opp_data,
ret = regmap_read(opp_data->syscon, opp_data->soc_data->efuse_offset,
&efuse);
if (ret) {
if (ret == -EIO) {
/* not a syscon register! */
void __iomem *regs = ioremap(OMAP3_SYSCON_BASE +
opp_data->soc_data->efuse_offset, 4);
if (!regs)
return -ENOMEM;
efuse = readl(regs);
iounmap(regs);
}
else if (ret) {
dev_err(dev,
"Failed to read the efuse value from syscon: %d\n",
ret);
@ -159,7 +250,17 @@ static int ti_cpufreq_get_rev(struct ti_cpufreq_data *opp_data,
ret = regmap_read(opp_data->syscon, opp_data->soc_data->rev_offset,
&revision);
if (ret) {
if (ret == -EIO) {
/* not a syscon register! */
void __iomem *regs = ioremap(OMAP3_SYSCON_BASE +
opp_data->soc_data->rev_offset, 4);
if (!regs)
return -ENOMEM;
revision = readl(regs);
iounmap(regs);
}
else if (ret) {
dev_err(dev,
"Failed to read the revision number from syscon: %d\n",
ret);
@ -189,8 +290,14 @@ static int ti_cpufreq_setup_syscon_register(struct ti_cpufreq_data *opp_data)
static const struct of_device_id ti_cpufreq_of_match[] = {
{ .compatible = "ti,am33xx", .data = &am3x_soc_data, },
{ .compatible = "ti,am3517", .data = &am3517_soc_data, },
{ .compatible = "ti,am43", .data = &am4x_soc_data, },
{ .compatible = "ti,dra7", .data = &dra7_soc_data },
{ .compatible = "ti,omap34xx", .data = &omap34xx_soc_data, },
{ .compatible = "ti,omap36xx", .data = &omap36xx_soc_data, },
/* legacy */
{ .compatible = "ti,omap3430", .data = &omap34xx_soc_data, },
{ .compatible = "ti,omap3630", .data = &omap36xx_soc_data, },
{},
};
@ -212,7 +319,7 @@ static int ti_cpufreq_probe(struct platform_device *pdev)
const struct of_device_id *match;
struct opp_table *ti_opp_table;
struct ti_cpufreq_data *opp_data;
const char * const reg_names[] = {"vdd", "vbb"};
const char * const default_reg_names[] = {"vdd", "vbb"};
int ret;
match = dev_get_platdata(&pdev->dev);
@ -268,9 +375,13 @@ static int ti_cpufreq_probe(struct platform_device *pdev)
opp_data->opp_table = ti_opp_table;
if (opp_data->soc_data->multi_regulator) {
const char * const *reg_names = default_reg_names;
if (opp_data->soc_data->reg_names)
reg_names = opp_data->soc_data->reg_names;
ti_opp_table = dev_pm_opp_set_regulators(opp_data->cpu_dev,
reg_names,
ARRAY_SIZE(reg_names));
ARRAY_SIZE(default_reg_names));
if (IS_ERR(ti_opp_table)) {
dev_pm_opp_put_supported_hw(opp_data->opp_table);
ret = PTR_ERR(ti_opp_table);

582
drivers/cpufreq/vexpress-spc-cpufreq.c
View File

@ -1,61 +1,592 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Versatile Express SPC CPUFreq Interface driver
*
* It provides necessary ops to arm_big_little cpufreq driver.
* Copyright (C) 2013 - 2019 ARM Ltd.
* Sudeep Holla <sudeep.holla@arm.com>
*
* Copyright (C) 2013 ARM Ltd.
* Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* Copyright (C) 2013 Linaro.
* Viresh Kumar <viresh.kumar@linaro.org>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/clk.h>
#include <linux/cpu.h>
#include <linux/cpufreq.h>
#include <linux/cpumask.h>
#include <linux/cpu_cooling.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
#include <linux/slab.h>
#include <linux/topology.h>
#include <linux/types.h>
#include "arm_big_little.h"
/* Currently we support only two clusters */
#define A15_CLUSTER 0
#define A7_CLUSTER 1
#define MAX_CLUSTERS 2
static int ve_spc_init_opp_table(const struct cpumask *cpumask)
#ifdef CONFIG_BL_SWITCHER
#include <asm/bL_switcher.h>
static bool bL_switching_enabled;
#define is_bL_switching_enabled() bL_switching_enabled
#define set_switching_enabled(x) (bL_switching_enabled = (x))
#else
#define is_bL_switching_enabled() false
#define set_switching_enabled(x) do { } while (0)
#define bL_switch_request(...) do { } while (0)
#define bL_switcher_put_enabled() do { } while (0)
#define bL_switcher_get_enabled() do { } while (0)
#endif
#define ACTUAL_FREQ(cluster, freq) ((cluster == A7_CLUSTER) ? freq << 1 : freq)
#define VIRT_FREQ(cluster, freq) ((cluster == A7_CLUSTER) ? freq >> 1 : freq)
static struct thermal_cooling_device *cdev[MAX_CLUSTERS];
static struct clk *clk[MAX_CLUSTERS];
static struct cpufreq_frequency_table *freq_table[MAX_CLUSTERS + 1];
static atomic_t cluster_usage[MAX_CLUSTERS + 1];
static unsigned int clk_big_min; /* (Big) clock frequencies */
static unsigned int clk_little_max; /* Maximum clock frequency (Little) */
static DEFINE_PER_CPU(unsigned int, physical_cluster);
static DEFINE_PER_CPU(unsigned int, cpu_last_req_freq);
static struct mutex cluster_lock[MAX_CLUSTERS];
static inline int raw_cpu_to_cluster(int cpu)
{
struct device *cpu_dev = get_cpu_device(cpumask_first(cpumask));
return topology_physical_package_id(cpu);
}
static inline int cpu_to_cluster(int cpu)
{
return is_bL_switching_enabled() ?
MAX_CLUSTERS : raw_cpu_to_cluster(cpu);
}
static unsigned int find_cluster_maxfreq(int cluster)
{
int j;
u32 max_freq = 0, cpu_freq;
for_each_online_cpu(j) {
cpu_freq = per_cpu(cpu_last_req_freq, j);
if (cluster == per_cpu(physical_cluster, j) &&
max_freq < cpu_freq)
max_freq = cpu_freq;
}
return max_freq;
}
static unsigned int clk_get_cpu_rate(unsigned int cpu)
{
u32 cur_cluster = per_cpu(physical_cluster, cpu);
u32 rate = clk_get_rate(clk[cur_cluster]) / 1000;
/* For switcher we use virtual A7 clock rates */
if (is_bL_switching_enabled())
rate = VIRT_FREQ(cur_cluster, rate);
return rate;
}
static unsigned int ve_spc_cpufreq_get_rate(unsigned int cpu)
{
if (is_bL_switching_enabled())
return per_cpu(cpu_last_req_freq, cpu);
else
return clk_get_cpu_rate(cpu);
}
static unsigned int
ve_spc_cpufreq_set_rate(u32 cpu, u32 old_cluster, u32 new_cluster, u32 rate)
{
u32 new_rate, prev_rate;
int ret;
bool bLs = is_bL_switching_enabled();
mutex_lock(&cluster_lock[new_cluster]);
if (bLs) {
prev_rate = per_cpu(cpu_last_req_freq, cpu);
per_cpu(cpu_last_req_freq, cpu) = rate;
per_cpu(physical_cluster, cpu) = new_cluster;
new_rate = find_cluster_maxfreq(new_cluster);
new_rate = ACTUAL_FREQ(new_cluster, new_rate);
} else {
new_rate = rate;
}
ret = clk_set_rate(clk[new_cluster], new_rate * 1000);
if (!ret) {
/*
* FIXME: clk_set_rate hasn't returned an error here however it
* may be that clk_change_rate failed due to hardware or
* firmware issues and wasn't able to report that due to the
* current design of the clk core layer. To work around this
* problem we will read back the clock rate and check it is
* correct. This needs to be removed once clk core is fixed.
*/
if (clk_get_rate(clk[new_cluster]) != new_rate * 1000)
ret = -EIO;
}
if (WARN_ON(ret)) {
if (bLs) {
per_cpu(cpu_last_req_freq, cpu) = prev_rate;
per_cpu(physical_cluster, cpu) = old_cluster;
}
mutex_unlock(&cluster_lock[new_cluster]);
return ret;
}
mutex_unlock(&cluster_lock[new_cluster]);
/* Recalc freq for old cluster when switching clusters */
if (old_cluster != new_cluster) {
/* Switch cluster */
bL_switch_request(cpu, new_cluster);
mutex_lock(&cluster_lock[old_cluster]);
/* Set freq of old cluster if there are cpus left on it */
new_rate = find_cluster_maxfreq(old_cluster);
new_rate = ACTUAL_FREQ(old_cluster, new_rate);
if (new_rate &&
clk_set_rate(clk[old_cluster], new_rate * 1000)) {
pr_err("%s: clk_set_rate failed: %d, old cluster: %d\n",
__func__, ret, old_cluster);
}
mutex_unlock(&cluster_lock[old_cluster]);
}
return 0;
}
/* Set clock frequency */
static int ve_spc_cpufreq_set_target(struct cpufreq_policy *policy,
unsigned int index)
{
u32 cpu = policy->cpu, cur_cluster, new_cluster, actual_cluster;
unsigned int freqs_new;
int ret;
cur_cluster = cpu_to_cluster(cpu);
new_cluster = actual_cluster = per_cpu(physical_cluster, cpu);
freqs_new = freq_table[cur_cluster][index].frequency;
if (is_bL_switching_enabled()) {
if (actual_cluster == A15_CLUSTER && freqs_new < clk_big_min)
new_cluster = A7_CLUSTER;
else if (actual_cluster == A7_CLUSTER &&
freqs_new > clk_little_max)
new_cluster = A15_CLUSTER;
}
ret = ve_spc_cpufreq_set_rate(cpu, actual_cluster, new_cluster,
freqs_new);
if (!ret) {
arch_set_freq_scale(policy->related_cpus, freqs_new,
policy->cpuinfo.max_freq);
}
return ret;
}
static inline u32 get_table_count(struct cpufreq_frequency_table *table)
{
int count;
for (count = 0; table[count].frequency != CPUFREQ_TABLE_END; count++)
;
return count;
}
/* get the minimum frequency in the cpufreq_frequency_table */
static inline u32 get_table_min(struct cpufreq_frequency_table *table)
{
struct cpufreq_frequency_table *pos;
u32 min_freq = ~0;
cpufreq_for_each_entry(pos, table)
if (pos->frequency < min_freq)
min_freq = pos->frequency;
return min_freq;
}
/* get the maximum frequency in the cpufreq_frequency_table */
static inline u32 get_table_max(struct cpufreq_frequency_table *table)
{
struct cpufreq_frequency_table *pos;
u32 max_freq = 0;
cpufreq_for_each_entry(pos, table)
if (pos->frequency > max_freq)
max_freq = pos->frequency;
return max_freq;
}
static bool search_frequency(struct cpufreq_frequency_table *table, int size,
unsigned int freq)
{
int count;
for (count = 0; count < size; count++) {
if (table[count].frequency == freq)
return true;
}
return false;
}
static int merge_cluster_tables(void)
{
int i, j, k = 0, count = 1;
struct cpufreq_frequency_table *table;
for (i = 0; i < MAX_CLUSTERS; i++)
count += get_table_count(freq_table[i]);
table = kcalloc(count, sizeof(*table), GFP_KERNEL);
if (!table)
return -ENOMEM;
freq_table[MAX_CLUSTERS] = table;
/* Add in reverse order to get freqs in increasing order */
for (i = MAX_CLUSTERS - 1; i >= 0; i--, count = k) {
for (j = 0; freq_table[i][j].frequency != CPUFREQ_TABLE_END;
j++) {
if (i == A15_CLUSTER &&
search_frequency(table, count, freq_table[i][j].frequency))
continue; /* skip duplicates */
table[k++].frequency =
VIRT_FREQ(i, freq_table[i][j].frequency);
}
}
table[k].driver_data = k;
table[k].frequency = CPUFREQ_TABLE_END;
return 0;
}
static void _put_cluster_clk_and_freq_table(struct device *cpu_dev,
const struct cpumask *cpumask)
{
u32 cluster = raw_cpu_to_cluster(cpu_dev->id);
if (!freq_table[cluster])
return;
clk_put(clk[cluster]);
dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table[cluster]);
}
static void put_cluster_clk_and_freq_table(struct device *cpu_dev,
const struct cpumask *cpumask)
{
u32 cluster = cpu_to_cluster(cpu_dev->id);
int i;
if (atomic_dec_return(&cluster_usage[cluster]))
return;
if (cluster < MAX_CLUSTERS)
return _put_cluster_clk_and_freq_table(cpu_dev, cpumask);
for_each_present_cpu(i) {
struct device *cdev = get_cpu_device(i);
if (!cdev)
return;
_put_cluster_clk_and_freq_table(cdev, cpumask);
}
/* free virtual table */
kfree(freq_table[cluster]);
}
static int _get_cluster_clk_and_freq_table(struct device *cpu_dev,
const struct cpumask *cpumask)
{
u32 cluster = raw_cpu_to_cluster(cpu_dev->id);
int ret;
if (freq_table[cluster])
return 0;
/*
* platform specific SPC code must initialise the opp table
* so just check if the OPP count is non-zero
*/
return dev_pm_opp_get_opp_count(cpu_dev) <= 0;
ret = dev_pm_opp_get_opp_count(cpu_dev) <= 0;
if (ret)
goto out;
ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table[cluster]);
if (ret)
goto out;
clk[cluster] = clk_get(cpu_dev, NULL);
if (!IS_ERR(clk[cluster]))
return 0;
dev_err(cpu_dev, "%s: Failed to get clk for cpu: %d, cluster: %d\n",
__func__, cpu_dev->id, cluster);
ret = PTR_ERR(clk[cluster]);
dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table[cluster]);
out:
dev_err(cpu_dev, "%s: Failed to get data for cluster: %d\n", __func__,
cluster);
return ret;
}
static int ve_spc_get_transition_latency(struct device *cpu_dev)
static int get_cluster_clk_and_freq_table(struct device *cpu_dev,
const struct cpumask *cpumask)
{
return 1000000; /* 1 ms */
u32 cluster = cpu_to_cluster(cpu_dev->id);
int i, ret;
if (atomic_inc_return(&cluster_usage[cluster]) != 1)
return 0;
if (cluster < MAX_CLUSTERS) {
ret = _get_cluster_clk_and_freq_table(cpu_dev, cpumask);
if (ret)
atomic_dec(&cluster_usage[cluster]);
return ret;
}
static const struct cpufreq_arm_bL_ops ve_spc_cpufreq_ops = {
/*
* Get data for all clusters and fill virtual cluster with a merge of
* both
*/
for_each_present_cpu(i) {
struct device *cdev = get_cpu_device(i);
if (!cdev)
return -ENODEV;
ret = _get_cluster_clk_and_freq_table(cdev, cpumask);
if (ret)
goto put_clusters;
}
ret = merge_cluster_tables();
if (ret)
goto put_clusters;
/* Assuming 2 cluster, set clk_big_min and clk_little_max */
clk_big_min = get_table_min(freq_table[A15_CLUSTER]);
clk_little_max = VIRT_FREQ(A7_CLUSTER,
get_table_max(freq_table[A7_CLUSTER]));
return 0;
put_clusters:
for_each_present_cpu(i) {
struct device *cdev = get_cpu_device(i);
if (!cdev)
return -ENODEV;
_put_cluster_clk_and_freq_table(cdev, cpumask);
}
atomic_dec(&cluster_usage[cluster]);
return ret;
}
/* Per-CPU initialization */
static int ve_spc_cpufreq_init(struct cpufreq_policy *policy)
{
u32 cur_cluster = cpu_to_cluster(policy->cpu);
struct device *cpu_dev;
int ret;
cpu_dev = get_cpu_device(policy->cpu);
if (!cpu_dev) {
pr_err("%s: failed to get cpu%d device\n", __func__,
policy->cpu);
return -ENODEV;
}
if (cur_cluster < MAX_CLUSTERS) {
int cpu;
cpumask_copy(policy->cpus, topology_core_cpumask(policy->cpu));
for_each_cpu(cpu, policy->cpus)
per_cpu(physical_cluster, cpu) = cur_cluster;
} else {
/* Assumption: during init, we are always running on A15 */
per_cpu(physical_cluster, policy->cpu) = A15_CLUSTER;
}
ret = get_cluster_clk_and_freq_table(cpu_dev, policy->cpus);
if (ret)
return ret;
policy->freq_table = freq_table[cur_cluster];
policy->cpuinfo.transition_latency = 1000000; /* 1 ms */
dev_pm_opp_of_register_em(policy->cpus);
if (is_bL_switching_enabled())
per_cpu(cpu_last_req_freq, policy->cpu) =
clk_get_cpu_rate(policy->cpu);
dev_info(cpu_dev, "%s: CPU %d initialized\n", __func__, policy->cpu);
return 0;
}
static int ve_spc_cpufreq_exit(struct cpufreq_policy *policy)
{
struct device *cpu_dev;
int cur_cluster = cpu_to_cluster(policy->cpu);
if (cur_cluster < MAX_CLUSTERS) {
cpufreq_cooling_unregister(cdev[cur_cluster]);
cdev[cur_cluster] = NULL;
}
cpu_dev = get_cpu_device(policy->cpu);
if (!cpu_dev) {
pr_err("%s: failed to get cpu%d device\n", __func__,
policy->cpu);
return -ENODEV;
}
put_cluster_clk_and_freq_table(cpu_dev, policy->related_cpus);
return 0;
}
static void ve_spc_cpufreq_ready(struct cpufreq_policy *policy)
{
int cur_cluster = cpu_to_cluster(policy->cpu);
/* Do not register a cpu_cooling device if we are in IKS mode */
if (cur_cluster >= MAX_CLUSTERS)
return;
cdev[cur_cluster] = of_cpufreq_cooling_register(policy);
}
static struct cpufreq_driver ve_spc_cpufreq_driver = {
.name = "vexpress-spc",
.get_transition_latency = ve_spc_get_transition_latency,
.init_opp_table = ve_spc_init_opp_table,
.flags = CPUFREQ_STICKY |
CPUFREQ_HAVE_GOVERNOR_PER_POLICY |
CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = ve_spc_cpufreq_set_target,
.get = ve_spc_cpufreq_get_rate,
.init = ve_spc_cpufreq_init,
.exit = ve_spc_cpufreq_exit,
.ready = ve_spc_cpufreq_ready,
.attr = cpufreq_generic_attr,
};
#ifdef CONFIG_BL_SWITCHER
static int bL_cpufreq_switcher_notifier(struct notifier_block *nfb,
unsigned long action, void *_arg)
{
pr_debug("%s: action: %ld\n", __func__, action);
switch (action) {
case BL_NOTIFY_PRE_ENABLE:
case BL_NOTIFY_PRE_DISABLE:
cpufreq_unregister_driver(&ve_spc_cpufreq_driver);
break;
case BL_NOTIFY_POST_ENABLE:
set_switching_enabled(true);
cpufreq_register_driver(&ve_spc_cpufreq_driver);
break;
case BL_NOTIFY_POST_DISABLE:
set_switching_enabled(false);
cpufreq_register_driver(&ve_spc_cpufreq_driver);
break;
default:
return NOTIFY_DONE;
}
return NOTIFY_OK;
}
static struct notifier_block bL_switcher_notifier = {
.notifier_call = bL_cpufreq_switcher_notifier,
};
static int __bLs_register_notifier(void)
{
return bL_switcher_register_notifier(&bL_switcher_notifier);
}
static int __bLs_unregister_notifier(void)
{
return bL_switcher_unregister_notifier(&bL_switcher_notifier);
}
#else
static int __bLs_register_notifier(void) { return 0; }
static int __bLs_unregister_notifier(void) { return 0; }
#endif
static int ve_spc_cpufreq_probe(struct platform_device *pdev)
{
return bL_cpufreq_register(&ve_spc_cpufreq_ops);
int ret, i;
set_switching_enabled(bL_switcher_get_enabled());
for (i = 0; i < MAX_CLUSTERS; i++)
mutex_init(&cluster_lock[i]);
ret = cpufreq_register_driver(&ve_spc_cpufreq_driver);
if (ret) {
pr_info("%s: Failed registering platform driver: %s, err: %d\n",
__func__, ve_spc_cpufreq_driver.name, ret);
} else {
ret = __bLs_register_notifier();
if (ret)
cpufreq_unregister_driver(&ve_spc_cpufreq_driver);
else
pr_info("%s: Registered platform driver: %s\n",
__func__, ve_spc_cpufreq_driver.name);
}
bL_switcher_put_enabled();
return ret;
}
static int ve_spc_cpufreq_remove(struct platform_device *pdev)
{
bL_cpufreq_unregister(&ve_spc_cpufreq_ops);
bL_switcher_get_enabled();
__bLs_unregister_notifier();
cpufreq_unregister_driver(&ve_spc_cpufreq_driver);
bL_switcher_put_enabled();
pr_info("%s: Un-registered platform driver: %s\n", __func__,
ve_spc_cpufreq_driver.name);
return 0;
}
@ -68,4 +599,7 @@ static struct platform_driver ve_spc_cpufreq_platdrv = {
};
module_platform_driver(ve_spc_cpufreq_platdrv);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Viresh Kumar <viresh.kumar@linaro.org>");
MODULE_AUTHOR("Sudeep Holla <sudeep.holla@arm.com>");
MODULE_DESCRIPTION("Vexpress SPC ARM big LITTLE cpufreq driver");
MODULE_LICENSE("GPL v2");