10.12.2021 17:38, Thierry Reding пишет:
> On Thu, Dec 09, 2021 at 10:13:56PM +0300, Dmitry Osipenko wrote:
>> 09.12.2021 20:33, Thierry Reding пишет:
>>> From: Thierry Reding <treding@xxxxxxxxxx>
>>>
>>> The "pwm-" prefix currently matches the DT schema for PWM controllers
>>> and throws an error in that case. This is something that should be fixed
>>> in the PWM DT schema, but in this case we can also preempt any such
>>> conflict by naming the nodes after the pins like we do for many others
>>> of these nodes.
>>>
>>> Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
>>> ---
>>> arch/arm/boot/dts/tegra20-colibri-eval-v3.dts | 4 ++--
>>> arch/arm/boot/dts/tegra20-colibri-iris.dts | 4 ++--
>>> arch/arm/boot/dts/tegra20-colibri.dtsi | 4 ++--
>>> 3 files changed, 6 insertions(+), 6 deletions(-)
>>>
>>> diff --git a/arch/arm/boot/dts/tegra20-colibri-eval-v3.dts b/arch/arm/boot/dts/tegra20-colibri-eval-v3.dts
>>> index a05fb3853da8..d2a3bf9d28bd 100644
>>> --- a/arch/arm/boot/dts/tegra20-colibri-eval-v3.dts
>>> +++ b/arch/arm/boot/dts/tegra20-colibri-eval-v3.dts
>>> @@ -70,11 +70,11 @@ mmccd {
>>> nvidia,tristate = <TEGRA_PIN_DISABLE>;
>>> };
>>>
>>> - pwm-a-b {
>>> + sdc {
>>> nvidia,tristate = <TEGRA_PIN_DISABLE>;
>>> };
>>>
>>> - pwm-c-d {
>>> + sdb_sdd {
>>> nvidia,tristate = <TEGRA_PIN_DISABLE>;
>>> };
>>>
>>> diff --git a/arch/arm/boot/dts/tegra20-colibri-iris.dts b/arch/arm/boot/dts/tegra20-colibri-iris.dts
>>> index 425494b9ed54..00ecbbd5e9e1 100644
>>> --- a/arch/arm/boot/dts/tegra20-colibri-iris.dts
>>> +++ b/arch/arm/boot/dts/tegra20-colibri-iris.dts
>>> @@ -70,11 +70,11 @@ mmccd {
>>> nvidia,tristate = <TEGRA_PIN_DISABLE>;
>>> };
>>>
>>> - pwm-a-b {
>>> + sdc {
>>> nvidia,tristate = <TEGRA_PIN_DISABLE>;
>>> };
>>>
>>> - pwm-c-d {
>>> + sdb_sdd {
>>> nvidia,tristate = <TEGRA_PIN_DISABLE>;
>>> };
>>>
>>> diff --git a/arch/arm/boot/dts/tegra20-colibri.dtsi b/arch/arm/boot/dts/tegra20-colibri.dtsi
>>> index 80e439003a6d..2350fda3be6a 100644
>>> --- a/arch/arm/boot/dts/tegra20-colibri.dtsi
>>> +++ b/arch/arm/boot/dts/tegra20-colibri.dtsi
>>> @@ -113,7 +113,7 @@ bl-on {
>>> };
>>>
>>> /* Colibri Backlight PWM<A>, PWM<B> */
>>> - pwm-a-b {
>>> + sdc {
>>> nvidia,pins = "sdc";
>>> nvidia,function = "pwm";
>>> nvidia,tristate = <TEGRA_PIN_ENABLE>;
>>> @@ -242,7 +242,7 @@ cif {
>>> };
>>>
>>> /* Colibri PWM<C>, PWM<D> */
>>> - pwm-c-d {
>>> + sdb_sdd {
>>> nvidia,pins = "sdb", "sdd";
>>> nvidia,function = "pwm";
>>> nvidia,tristate = <TEGRA_PIN_ENABLE>;
>>>
>>
>> Should be a bit nicer to add the 'pin-' prefix, like I suggested to
>> David [1] sometime ago.
>
> We don't use the pin- prefix anywhere else, so it would just look out of
> place. We've used this kind of notation where the node name is composed
> of the concatenation of the pins defined within elsewhere, so I prefer
> that.
I borrowed idea to use the 'pin-' prefix from device-trees
of other vendors. To me it's a good practice to have nodes with
meaningful names.
