2015-02-15 23:31 GMT+01:00 Rob Herring <robherring2@xxxxxxxxx>:
> On Thu, Feb 12, 2015 at 11:45 AM, Maxime Coquelin
> <mcoquelin.stm32@xxxxxxxxx> wrote:
>> This patch adds clocksource support for ARMv7-M's System timer,
>> also known as SysTick.
>>
>> Signed-off-by: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>
>> ---
>> .../devicetree/bindings/arm/system_timer.txt | 15 +++++
>
> Please include v7M in the name. System timer sounds very generic. This
> is the only timer architecturally defined IIRC, so perhaps just
> "armv7m_systick".
Ok, let's go for "armv7m_systick".
>
>> drivers/clocksource/Kconfig | 7 ++
>> drivers/clocksource/Makefile | 1 +
>> drivers/clocksource/arm_system_timer.c | 74 ++++++++++++++++++++++
>
> Same here.
Agree, will be in the v2.
>
>
>> 4 files changed, 97 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/arm/system_timer.txt
>> create mode 100644 drivers/clocksource/arm_system_timer.c
>>
>> diff --git a/Documentation/devicetree/bindings/arm/system_timer.txt b/Documentation/devicetree/bindings/arm/system_timer.txt
>> new file mode 100644
>> index 0000000..35268b7
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/arm/system_timer.txt
>> @@ -0,0 +1,15 @@
>> +* ARM System Timer
>> +
>> +ARMv7-M includes a system timer, known as SysTick. Current driver only
>> +implements the clocksource feature.
>> +
>> +Required properties:
>> +- compatible : Should be "arm,armv7m-systick"
>> +- reg : The address range of the timer
>> +- clocks : The input clock of the timer
>
> You may want to consider supporting "clock-frequency" here too. In
> more simple chips you may just have fixed clocks and may want to run a
> kernel with COMMON_CLK disabled for size savings.
Ok, I will add this option in the v2.
>
>> +
>> +systick: system-timer {
>
> This should be "systick: timer@e000e010".
>
> Same for your dts file.
Right, it will be fixed in the v2.
Thanks for the review,
Maxime
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