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David S. Miller ea84c84290 Merge branch 'net-ethernet-ti-k3-introduce-common-platform-time-sync-driver-cpts' 
Grygorii Strashko says:

====================
net: ethernet: ti: k3: introduce common platform time sync driver - cpts

This series introduced support for significantly upgraded TI A65x/J721E Common
platform time sync (CPTS) modules which are part of AM65xx Time Synchronization
Architecture [1].
The TI A65x/J721E now contain more than one CPTS instance:
- MCU CPSW CPTS (IEEE 1588 compliant)
- Main NAVSS CPTS (central)
- PCIe CPTS(s) (PTM  compliant)
- J721E: Main CPSW9g CPTS (IEEE 1588 compliant)
which can work as separately as interact to each other through Time Sync Router
(TSR) and Compare Event Router (CER). In addition there are also ICSS-G IEP
blocks which can perform similar timsync functions, but require FW support.
More info also available in TRM [2][3]. Not all above modules are available
to the Linux by as of now as some of them are reserved for RTOS/FW purposes.

The scope of this submission is TI A65x/J721E CPSW CPTS and Main NAVSS CPTS,
and TSR was used for testing purposes.
                                                                       +---------------------------+
                                                                       | MCU CPSW                  |
+-------------------+           +------------------------+             |                TS         |
| Main Navss CPTS   |           | Time Sync Router (TSR) |             |          +-------------+  |
|                   |           |                        |             |          |             |  |
|            HW1_TS +<----------+                        |             | +--------v-----+    +--+--+
|                   |           |                        |             | |        CPTS  |    |Port |
|              ...  |           |                        |           X+-->HW1_TS        |    |     |
|            HW8_TS <------------<---------+             |           X|-->HW2_TS        |    +--^--+
|                   |           |          |             +--------------->HW3_TS        |       |  |
|                   |           |          |             +--------------->HW4_TS        |       |  |
|                   |           |          |             |             | |              |       |  |
|                   |           |          |             |             | |              |       |  |
|            Genf0  +----------->          (A)---------+ +<--------------+Genf0         |       |  |
|                   |           |          |             |             | |              |       |  |
|              ...  |           |          +-----------> <---------------+Genf1     ESTf+-------+  |
|                   |           |                        |             | |              |          |
|                   |           |                        |             | +--------------+          |
|            Genf8  +---------->+                        |             |                           |
|                   |           |    SYNC0 ...    SYNC3  |             |                           |
+-------------------+           +------+------------+----+             +---------------------------+
                                       +            +
                                       X            X
(A) shows possible routing path for MCU CPSW CPTS Genf0 signal as an example.

Main features of the new TI A65x/J721E CPTS modules are:
- 64-bit timestamp/counter mode support in ns by using add_val
- implemented in HW PPM and nudge adjustment.
- control of time sync events via interrupt or polling
- selection of multiple external reference clock sources
- hardware timestamp of ext. inputs events (HWx_TS_PUSH)
- periodic generator function outputs (TS_GENFx)
- (CPSW only) Ethernet Enhanced Scheduled Traffic Operations (CPTS_ESTFn),
  which drives TSN schedule
- timestamping of all RX packets bypassing CPTS FIFO

Patch 1 - DT bindings
Patch 2 - the AM65x/J721E driver
Patch 3 - enables packet timestamping support in TI AM65x/J721E MCU CPSW driver.
Patches 4-7 - DT updates.

=== PTP Testing:

phc2sys -s CLOCK_REALTIME -c eth0 -m -O 0 -u30
phc2sys[627.331]: eth0 rms 409912446712787392 max 1587584079521858304 freq  -6665 +/- 35040 delay   832 +/-  27
phc2sys[657.335]: eth0 rms   33 max   66 freq     -0 +/-  28 delay   820 +/-  30
phc2sys[687.339]: eth0 rms   37 max   70 freq     -1 +/-  32 delay   830 +/-  29
phc2sys[717.343]: eth0 rms   33 max   71 freq     -0 +/-  29 delay   828 +/-  23
phc2sys[747.346]: eth0 rms   35 max   75 freq     -0 +/-  31 delay   829 +/-  26
phc2sys[777.350]: eth0 rms   37 max   68 freq     -1 +/-  32 delay   825 +/-  25
phc2sys[807.354]: eth0 rms   28 max   57 freq     -1 +/-  25 delay   824 +/-  21
phc2sys[837.358]: eth0 rms   43 max   81 freq     -1 +/-  37 delay   836 +/-  23
phc2sys[867.361]: eth0 rms   33 max   74 freq     +0 +/-  29 delay   828 +/-  24
phc2sys[897.365]: eth0 rms   35 max   77 freq     -2 +/-  30 delay   824 +/-  25
phc2sys[927.369]: eth0 rms   28 max   50 freq     +0 +/-  25 delay   825 +/-  25

ptp4l -P -2 -H -i eth0 -l 6 -m -q -p /dev/ptp1 -f ptp.cfg -s
ptp4l[22095.754]: port 1: MASTER to UNCALIBRATED on RS_SLAVE
ptp4l[22097.754]: port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED
ptp4l[22159.757]: rms  317 max 1418 freq    +79 +/- 186 delay   410 +/-   1
ptp4l[22223.760]: rms    9 max   24 freq    +42 +/-  12 delay   409 +/-   1
ptp4l[22287.763]: rms   10 max   28 freq    +41 +/-  11 delay   410 +/-   1
ptp4l[22351.767]: rms   10 max   26 freq    +34 +/-  12 delay   410 +/-   1
ptp4l[22415.770]: rms   10 max   26 freq    +49 +/-  14 delay   410 +/-   1

=== Ext. HW_TS and Genf testing:

For testing purposes Time Sync Router (TSR) can be modeled in DT as pin controller
+       timesync_router: timesync_router@A40000 {
+               compatible = "pinctrl-single";
+               reg = <0x0 0xA40000 0x0 0x800>;
+               #address-cells = <1>;
+               #size-cells = <0>;
+               #pinctrl-cells = <1>;
+               pinctrl-single,register-width = <32>;
+               pinctrl-single,function-mask = <0x800007ff>;
+       };

then signals routing can be done in board file, for example:
+#define TS_OFFSET(pa, val)     (0x4+(pa)*4) (0x80000000 | val)
+
+&timesync_router {
+       pinctrl-names = "default";
+       pinctrl-0 = <&mcu_cpts>;
+
+       /* Example of the timesync routing */
+       mcu_cpts: mcu_cpts {
+               pinctrl-single,pins = <
+                       /* [cpts genf1] in13 -> out25 [cpts hw4_push] */
+                       TS_OFFSET(25, 13)
+                       /* [cpts genf1] in13 -> out0 [main cpts hw1_push] */
+                       TS_OFFSET(0, 13)
+                       /* [main cpts genf0] in4 -> out1 [main cpts hw2_push] */
+                       TS_OFFSET(1, 4)
+                       /* [main cpts genf0] in4 -> out24 [cpts hw3_push] */
+                       TS_OFFSET(24, 4)
+               >;
+       };
+};

will create link:
    cpsw cpts Genf1 -> main cpts hw1_push
                    -> cpsw cpts hw4_push

    main cpts Genf0 -> main cpts hw2_push
                    -> cpsw cpts hw3_push

 testptp -d /dev/ptp0 -i 0 -p 1000000000
 periodic output request okay
 testptp -d /dev/ptp0 -i 1 -e 5
 external time stamp request okay
 event index 1 at 22583.000000025
 event index 1 at 22584.000000025
 event index 1 at 22585.000000025
 event index 1 at 22586.000000025
 event index 1 at 22587.000000025
 testptp -d /dev/ptp1 -i 2 -e 5
 external time stamp request okay
 event index 2 at 1587606764.249304554
 event index 2 at 1587606765.249304467
 event index 2 at 1587606766.249304380
 event index 2 at 1587606767.249304293
 event index 2 at 1587606768.249304206

[1] https://www.ti.com/lit/pdf/spracp7
[2] https://www.ti.com/lit/pdf/sprz452
[3] https://www.ti.com/lit/pdf/spruil1
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
 		2020-05-04 12:02:03 -07:00
Documentation dt-binding: ti: am65x: document common platform time sync cpts module 2020-05-04 12:02:02 -07:00
LICENSES LICENSES: Rename other to deprecated 2019-05-03 06:34:32 -06:00
arch arm64: dts: ti: j721e-main: add main navss cpts node 2020-05-04 12:02:03 -07:00
block blk-iocost: Fix error on iocost_ioc_vrate_adj 2020-04-21 09:49:36 -06:00
certs .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2020-04-01 14:47:40 -07:00
drivers net: ethernet: ti: am65-cpsw-nuss: enable packet timestamping support 2020-05-04 12:02:03 -07:00
fs Merge branch 'work.sysctl' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-04-28 21:23:38 +02:00
include net_sched: sch_fq: add horizon attribute 2020-05-04 11:56:17 -07:00
init Kbuild updates for v5.7 (2nd) 2020-04-11 09:46:12 -07:00
ipc sysctl: pass kernel pointers to ->proc_handler 2020-04-27 02:07:40 -04:00
kernel bpf: Fix use-after-free of bpf_link when priming half-fails 2020-05-01 15:13:05 -07:00
lib netlink: factor out policy range helpers 2020-04-30 17:51:42 -07:00
mm Merge branch 'work.sysctl' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-04-28 21:23:38 +02:00
net devlink: let kernel allocate region snapshot id 2020-05-04 11:58:31 -07:00
samples docs: networking: convert pktgen.txt to ReST 2020-04-30 12:56:37 -07:00
scripts Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-04-25 20:18:53 -07:00
security Merge branch 'work.sysctl' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-04-28 21:23:38 +02:00
sound sound fixes for 5.7-rc3 2020-04-24 10:27:43 -07:00
tools devlink: let kernel allocate region snapshot id 2020-05-04 11:58:31 -07:00
usr kbuild: fix comment about missing include guard detection 2020-04-11 12:09:48 +09:00
virt KVM: Pass kvm_init()'s opaque param to additional arch funcs 2020-03-31 10:48:03 -04:00
.clang-format clang-format: Update with the latest for_each macro list 2020-04-18 13:49:33 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
.mailmap mailmap: Add Sedat Dilek (replacement for expired email address) 2020-04-11 09:28:34 -07:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Hand MIPS over to Thomas 2020-02-24 22:43:18 -08:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig docs: kbuild: convert docs to ReST and rename to *.rst 2019-06-14 14:21:21 -06:00
MAINTAINERS docs: networking: device drivers: convert toshiba/spider_net.txt to ReST 2020-05-01 12:24:43 -07:00
Makefile Linux 5.7-rc2 2020-04-19 14:35:30 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.