On 19/05/20 9:16 pm, Richard Cochran wrote:
> On Tue, May 19, 2020 at 11:41:45AM +, Geva, Erez wrote:
>> From a quick look.
>> It seems that it is 'pwmchip%d' for a long time.
>>
>> https://elixir.bootlin.com/linux/v4.0/source/drivers/pwm/sysfs.c#L314
>
> Looks like my v4.19.25-rt16 kernel
vel@lists.sourceforge.net;
e-ru...@ti.com
Subject: Re: [Linuxptp-devel] [RFC PATCH v2 2/3] pwm: Add helper apis to
control pwm
On Sat, May 16, 2020 at 11:53:57PM +0530, Lokesh Vutla wrote:
> +#define PWM_CHAN_EXPORT "/sys/class/pwm/pwmchip%d/export"
> +#define PWM_CHAN_ENABLE
On Tue, May 19, 2020 at 11:41:45AM +, Geva, Erez wrote:
> From a quick look.
> It seems that it is 'pwmchip%d' for a long time.
>
> https://elixir.bootlin.com/linux/v4.0/source/drivers/pwm/sysfs.c#L314
Looks like my v4.19.25-rt16 kernel has a bad commit with a regression.
The documentation,
On Sat, May 16, 2020 at 11:53:57PM +0530, Lokesh Vutla wrote:
> +#define PWM_CHAN_EXPORT "/sys/class/pwm/pwmchip%d/export"
> +#define PWM_CHAN_ENABLE "/sys/class/pwm/pwmchip%d/pwm%d/enable"
> +#define PWM_CHAN_PERIOD "/sys/class/pwm/pwmchip%d/pwm%d/period"
Add pwm helper api calls to control PWM using /sys/class entries.
Following apis are supported:
- pwm_chan_enable
- pwm_chan_disable
- pwm_chan_set_period
- pwm_chan_set_duty_cycle
- pwm_chan_create
Signed-off-by: Lokesh Vutla
---
makefile | 2 +-
pwm.c| 223
