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dt-bindings: devfreq: rk3399_dmc: improve binding documentation. 

There are several typos, references to non existent files, grammar and
punctuation mistakes in the rk3399_dmc.txt binding. This patch tries
to improve the binding documentation and fix these mistakes.

Signed-off-by: Nick Milner <nick.milner@collabora.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Rob Herring <robh@kernel.org>
- [1/5] Fix some attributes to match with the code s/_disb/_dis/
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
This commit is contained in:
Nick Milner 2018-05-09 14:57:43 +02:00 committed by MyungJoo Ham
parent 2d803dc8f7
commit 2d2894c94a
1 changed files with 96 additions and 93 deletions
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189
Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt
View File

@ -1,14 +1,14 @@
* Rockchip rk3399 DMC(Dynamic Memory Controller) device
* Rockchip rk3399 DMC (Dynamic Memory Controller) device
Required properties:
- compatible: Must be "rockchip,rk3399-dmc".
- devfreq-events: Node to get DDR loading, Refer to
Documentation/devicetree/bindings/devfreq/
Documentation/devicetree/bindings/devfreq/event/
rockchip-dfi.txt
- interrupts: The interrupt number to the CPU. The interrupt
specifier format depends on the interrupt controller.
It should be DCF interrupts, when DDR dvfs finish,
it will happen.
- interrupts: The CPU interrupt number. The interrupt specifier
format depends on the interrupt controller.
It should be a DCF interrupt. When DDR DVFS finishes
a DCF interrupt is triggered.
- clocks: Phandles for clock specified in "clock-names" property
- clock-names : The name of clock used by the DFI, must be
"pclk_ddr_mon";
@ -17,139 +17,142 @@ Required properties:
- center-supply: DMC supply node.
- status: Marks the node enabled/disabled.
Following properties are ddr timing:
Following properties relate to DDR timing:
- rockchip,dram_speed_bin : Value reference include/dt-bindings/clock/ddr.h,
it select ddr3 cl-trp-trcd type, default value
"DDR3_DEFAULT".it must selected according to
"Speed Bin" in ddr3 datasheet, DO NOT use
smaller "Speed Bin" than ddr3 exactly is.
it selects the DDR3 cl-trp-trcd type. It must be
set according to "Speed Bin" in DDR3 datasheet,
DO NOT use a smaller "Speed Bin" than specified
for the DDR3 being used.
- rockchip,pd_idle : Config the PD_IDLE value, defined the power-down
idle period, memories are places into power-down
mode if bus is idle for PD_IDLE DFI clocks.
- rockchip,pd_idle : Configure the PD_IDLE value. Defines the
power-down idle period in which memories are
placed into power-down mode if bus is idle
for PD_IDLE DFI clock cycles.
- rockchip,sr_idle : Configure the SR_IDLE value, defined the
selfrefresh idle period, memories are places
into self-refresh mode if bus is idle for
SR_IDLE*1024 DFI clocks (DFI clocks freq is
half of dram's clocks), defaule value is "0".
- rockchip,sr_idle : Configure the SR_IDLE value. Defines the
self-refresh idle period in which memories are
placed into self-refresh mode if bus is idle
for SR_IDLE * 1024 DFI clock cycles (DFI
clocks freq is half of DRAM clock), default
value is "0".
- rockchip,sr_mc_gate_idle : Defined the self-refresh with memory and
controller clock gating idle period, memories
are places into self-refresh mode and memory
controller clock arg gating if bus is idle for
sr_mc_gate_idle*1024 DFI clocks.
- rockchip,sr_mc_gate_idle : Defines the memory self-refresh and controller
clock gating idle period. Memories are placed
into self-refresh mode and memory controller
clock arg gating started if bus is idle for
sr_mc_gate_idle*1024 DFI clock cycles.
- rockchip,srpd_lite_idle : Defined the self-refresh power down idle
period, memories are places into self-refresh
power down mode if bus is idle for
srpd_lite_idle*1024 DFI clocks. This parameter
is for LPDDR4 only.
- rockchip,srpd_lite_idle : Defines the self-refresh power down idle
period in which memories are placed into
self-refresh power down mode if bus is idle
for srpd_lite_idle * 1024 DFI clock cycles.
This parameter is for LPDDR4 only.
- rockchip,standby_idle : Defined the standby idle period, memories are
places into self-refresh than controller, pi,
phy and dram clock will gating if bus is idle
for standby_idle * DFI clocks.
- rockchip,standby_idle : Defines the standby idle period in which
memories are placed into self-refresh mode.
The controller, pi, PHY and DRAM clock will
be gated if bus is idle for standby_idle * DFI
clock cycles.
- rockchip,dram_dll_disb_freq : It's defined the DDR3 dll bypass frequency in
MHz, when ddr freq less than DRAM_DLL_DISB_FREQ,
ddr3 dll will bypssed note: if dll was bypassed,
the odt also stop working.
- rockchip,dram_dll_dis_freq : Defines the DDR3 DLL bypass frequency in MHz.
When DDR frequency is less than DRAM_DLL_DISB_FREQ,
DDR3 DLL will be bypassed. Note: if DLL was bypassed,
the odt will also stop working.
- rockchip,phy_dll_disb_freq : Defined the PHY dll bypass frequency in
MHz (Mega Hz), when ddr freq less than
DRAM_DLL_DISB_FREQ, phy dll will bypssed.
note: phy dll and phy odt are independent.
- rockchip,phy_dll_dis_freq : Defines the PHY dll bypass frequency in
MHz (Mega Hz). When DDR frequency is less than
DRAM_DLL_DISB_FREQ, PHY DLL will be bypassed.
Note: PHY DLL and PHY ODT are independent.
- rockchip,ddr3_odt_disb_freq : When dram type is DDR3, this parameter defined
the odt disable frequency in MHz (Mega Hz),
when ddr frequency less then ddr3_odt_disb_freq,
the odt on dram side and controller side are
- rockchip,ddr3_odt_dis_freq : When the DRAM type is DDR3, this parameter defines
the ODT disable frequency in MHz (Mega Hz).
when the DDR frequency is less then ddr3_odt_dis_freq,
the ODT on the DRAM side and controller side are
both disabled.
- rockchip,ddr3_drv : When dram type is DDR3, this parameter define
the dram side driver stength in ohm, default
- rockchip,ddr3_drv : When the DRAM type is DDR3, this parameter defines
the DRAM side driver strength in ohms. Default
value is DDR3_DS_40ohm.
- rockchip,ddr3_odt : When dram type is DDR3, this parameter define
the dram side ODT stength in ohm, default value
- rockchip,ddr3_odt : When the DRAM type is DDR3, this parameter defines
the DRAM side ODT strength in ohms. Default value
is DDR3_ODT_120ohm.
- rockchip,phy_ddr3_ca_drv : When dram type is DDR3, this parameter define
the phy side CA line(incluing command line,
- rockchip,phy_ddr3_ca_drv : When the DRAM type is DDR3, this parameter defines
the phy side CA line (incluing command line,
address line and clock line) driver strength.
Default value is PHY_DRV_ODT_40.
- rockchip,phy_ddr3_dq_drv : When dram type is DDR3, this parameter define
the phy side DQ line(incluing DQS/DQ/DM line)
driver strength. default value is PHY_DRV_ODT_40.
- rockchip,phy_ddr3_dq_drv : When the DRAM type is DDR3, this parameter defines
the PHY side DQ line (including DQS/DQ/DM line)
driver strength. Default value is PHY_DRV_ODT_40.
- rockchip,phy_ddr3_odt : When dram type is DDR3, this parameter define the
phy side odt strength, default value is
- rockchip,phy_ddr3_odt : When the DRAM type is DDR3, this parameter defines
the PHY side ODT strength. Default value is
PHY_DRV_ODT_240.
- rockchip,lpddr3_odt_disb_freq : When dram type is LPDDR3, this parameter defined
then odt disable frequency in MHz (Mega Hz),
when ddr frequency less then ddr3_odt_disb_freq,
the odt on dram side and controller side are
- rockchip,lpddr3_odt_dis_freq : When the DRAM type is LPDDR3, this parameter defines
then ODT disable frequency in MHz (Mega Hz).
When DDR frequency is less then ddr3_odt_dis_freq,
the ODT on the DRAM side and controller side are
both disabled.
- rockchip,lpddr3_drv : When dram type is LPDDR3, this parameter define
the dram side driver stength in ohm, default
- rockchip,lpddr3_drv : When the DRAM type is LPDDR3, this parameter defines
the DRAM side driver strength in ohms. Default
value is LP3_DS_34ohm.
- rockchip,lpddr3_odt : When dram type is LPDDR3, this parameter define
the dram side ODT stength in ohm, default value
- rockchip,lpddr3_odt : When the DRAM type is LPDDR3, this parameter defines
the DRAM side ODT strength in ohms. Default value
is LP3_ODT_240ohm.
- rockchip,phy_lpddr3_ca_drv : When dram type is LPDDR3, this parameter define
the phy side CA line(incluing command line,
- rockchip,phy_lpddr3_ca_drv : When the DRAM type is LPDDR3, this parameter defines
the PHY side CA line (including command line,
address line and clock line) driver strength.
default value is PHY_DRV_ODT_40.
Default value is PHY_DRV_ODT_40.
- rockchip,phy_lpddr3_dq_drv : When dram type is LPDDR3, this parameter define
the phy side DQ line(incluing DQS/DQ/DM line)
driver strength. default value is
- rockchip,phy_lpddr3_dq_drv : When the DRAM type is LPDDR3, this parameter defines
the PHY side DQ line (including DQS/DQ/DM line)
driver strength. Default value is
PHY_DRV_ODT_40.
- rockchip,phy_lpddr3_odt : When dram type is LPDDR3, this parameter define
the phy side odt strength, default value is
PHY_DRV_ODT_240.
- rockchip,lpddr4_odt_disb_freq : When dram type is LPDDR4, this parameter
defined the odt disable frequency in
MHz (Mega Hz), when ddr frequency less then
ddr3_odt_disb_freq, the odt on dram side and
- rockchip,lpddr4_odt_dis_freq : When the DRAM type is LPDDR4, this parameter
defines the ODT disable frequency in
MHz (Mega Hz). When the DDR frequency is less then
ddr3_odt_dis_freq, the ODT on the DRAM side and
controller side are both disabled.
- rockchip,lpddr4_drv : When dram type is LPDDR4, this parameter define
the dram side driver stength in ohm, default
- rockchip,lpddr4_drv : When the DRAM type is LPDDR4, this parameter defines
the DRAM side driver strength in ohms. Default
value is LP4_PDDS_60ohm.
- rockchip,lpddr4_dq_odt : When dram type is LPDDR4, this parameter define
the dram side ODT on dqs/dq line stength in ohm,
default value is LP4_DQ_ODT_40ohm.
- rockchip,lpddr4_dq_odt : When the DRAM type is LPDDR4, this parameter defines
the DRAM side ODT on DQS/DQ line strength in ohms.
Default value is LP4_DQ_ODT_40ohm.
- rockchip,lpddr4_ca_odt : When dram type is LPDDR4, this parameter define
the dram side ODT on ca line stength in ohm,
default value is LP4_CA_ODT_40ohm.
- rockchip,lpddr4_ca_odt : When the DRAM type is LPDDR4, this parameter defines
the DRAM side ODT on CA line strength in ohms.
Default value is LP4_CA_ODT_40ohm.
- rockchip,phy_lpddr4_ca_drv : When dram type is LPDDR4, this parameter define
the phy side CA line(incluing command address
line) driver strength. default value is
- rockchip,phy_lpddr4_ca_drv : When the DRAM type is LPDDR4, this parameter defines
the PHY side CA line (including command address
line) driver strength. Default value is
PHY_DRV_ODT_40.
- rockchip,phy_lpddr4_ck_cs_drv : When dram type is LPDDR4, this parameter define
the phy side clock line and cs line driver
strength. default value is PHY_DRV_ODT_80.
- rockchip,phy_lpddr4_ck_cs_drv : When the DRAM type is LPDDR4, this parameter defines
the PHY side clock line and CS line driver
strength. Default value is PHY_DRV_ODT_80.
- rockchip,phy_lpddr4_dq_drv : When dram type is LPDDR4, this parameter define
the phy side DQ line(incluing DQS/DQ/DM line)
driver strength. default value is PHY_DRV_ODT_80.
- rockchip,phy_lpddr4_dq_drv : When the DRAM type is LPDDR4, this parameter defines
the PHY side DQ line (including DQS/DQ/DM line)
driver strength. Default value is PHY_DRV_ODT_80.
- rockchip,phy_lpddr4_odt : When dram type is LPDDR4, this parameter define
the phy side odt strength, default value is
- rockchip,phy_lpddr4_odt : When the DRAM type is LPDDR4, this parameter defines
the PHY side ODT strength. Default value is
PHY_DRV_ODT_60.
Example: