Re: [PATCH v2] ACPI: LPSS: Add pwm_lookup_table entry for second PWM on CHT/BSW devices

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On Tue, May 09, 2023 at 02:41:00PM +0200, Hans de Goede wrote:
> BSW PWM2 is used for backlight control for fixed (etched into the glass)
> touch controls on some models.
> 
> Add an entry for the second PWM controller to bsw_pwm_lookup,
> so that drivers can use pwm_get() to get a reference to it.
> 
> These touch-controls have specialized drivers which bind to different
> devices on different models, so the consumer-device-name in the lookup
> table entry is set to NULL, so that only con-id matching is used.
> 
> The con-id is set to "pwm_soc_lpss_2" which describes the PWM controller
> rather than the usual approach of describing its function.
> The specialized (model specific) drivers which need access to the PWM
> controller know they need the "pwm_soc_lpss_2" con-id.
> 
> Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
> Acked-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>

Reviewed-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>



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