Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx> writes:
> This adds support for the PWM controller in the AO domain.
Patches 1,3 applied to Amlogic v4.11/dt64 branch.
Kevin
> pinctrl support for GXBB already exists (in both, pinctrl-meson-gxbb.c
> and meson-gxbb.dtsi). This patch adds at least the pwm_ao_b pin for
> GXL and GXM - these are not documented in Amlogic's kernel, so I had
> to borrow the magic numbers from the Khadas VIM kernel (released under
> the GPL): [0]
>
> The bits for pwm_AO_a_pins are unknown at the time of writing, but these
> can still be added later.
>
> I have successfully tested this on my GXL S905X based Khadas VIM board
> with the following .dts snippets (the PWM LED can simply be dimmed
> through sysfs):
> &pwm_AO_ab {
> status = "okay";
> pinctrl-0 = <&pwm_ao_b_pins>;
> pinctrl-names = "default";
> clocks = <&clkc CLKID_FCLK_DIV4>;
> clock-names = "clkin0";
> };
>
> pwmleds {
> compatible = "pwm-leds";
>
> power {
> label = "vim:red:power";
> pwms = <&pwm_AO_ab 1 7812500 0>;
> max-brightness = <255>;
> };
> };
>
> (if anyone is interested in more of my Khadas VIM patches - these are
> still work-in-progress, which is why I have not sent them yet - can
> take a look at this: [1])
>
> NOTE: The .dts changes from this series are based on top of my SAR ADC
> patches.
>
> [0] https://github.com/khadas/linux/blob/94602ef5562978a8d8b5c7770c113074a714dbdb/drivers/amlogic/led/led_trigger_breathe.c#L75
> [1] https://github.com/xdarklight/linux/commits/meson-gx-integration-4.11-20170122
>
> Martin Blumenstingl (3):
> ARM64: dts: meson-gx: add the missing pwm_AO_ab node
> pinctrl: meson: meson-gxl: add the pwm_ao_b pin
> ARM64: dts: meson-gxl: add the pwm_ao_b pin
>
> arch/arm64/boot/dts/amlogic/meson-gx.dtsi | 7 +++++++
> arch/arm64/boot/dts/amlogic/meson-gxl.dtsi | 7 +++++++
> drivers/pinctrl/meson/pinctrl-meson-gxl.c | 8 ++++++++
> 3 files changed, 22 insertions(+)
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
