This adds support for the PWM controller in the AO domain.
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(+)
--
2.11.0
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