Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx> writes:
> This adds support for the pwm_ao_b pin. Unfortunately the registers for
> the pwm_ao pins are not documented at all. The source for the pwm_ao_b
> pin from this patch is the Khadas VIM GPL kernel source, which sets bit
> 3 and unsets bits 4 and 31 to enable the PWM LEDs.
>
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
> ---
> drivers/pinctrl/meson/pinctrl-meson-gxl.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/pinctrl/meson/pinctrl-meson-gxl.c b/drivers/pinctrl/meson/pinctrl-meson-gxl.c
> index 25694f7094c7..6ff321a7366d 100644
> --- a/drivers/pinctrl/meson/pinctrl-meson-gxl.c
> +++ b/drivers/pinctrl/meson/pinctrl-meson-gxl.c
> @@ -222,6 +222,8 @@ static const unsigned int uart_rts_ao_b_pins[] = { PIN(GPIOAO_3, 0) };
>
> static const unsigned int remote_input_ao_pins[] = {PIN(GPIOAO_7, 0) };
>
> +static const unsigned int pwm_ao_b_pins[] = { PIN(GPIOAO_9, 0) };
> +
Hmm, the S905 public data sheet[1] shows this as GPIOAO_13.
> static struct meson_pmx_group meson_gxl_periphs_groups[] = {
> GPIO_GROUP(GPIOZ_0, EE_OFF),
> GPIO_GROUP(GPIOZ_1, EE_OFF),
> @@ -418,6 +420,7 @@ static struct meson_pmx_group meson_gxl_aobus_groups[] = {
> GROUP(uart_cts_ao_b, 0, 8),
> GROUP(uart_rts_ao_b, 0, 7),
> GROUP(remote_input_ao, 0, 0),
> + GROUP(pwm_ao_b, 0, 3),
> };
but it does show as ao_reg[3].
Kevin
[1] http://dn.odroid.com/S905/DataSheet/S905_Public_Datasheet_V1.1.4.pdf
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