| Message ID | 20170608123955.3571-1-jbrunet@baylibre.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Jerome Brunet <jbrunet@baylibre.com> writes: > Use the specific compatible for AO pwms so the pwms input can > be correctly set > > FDIV4 is not present on the pwm A0, so change kadhas vim input > clocks to xtal. > > Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Adding this to fixes v4.13-rc since the PWM driver is now merged. Kevin
diff --git a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi index 436b875060e7..fbaa6b598fca 100644 --- a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi @@ -391,7 +391,7 @@ }; pwm_AO_ab: pwm@550 { - compatible = "amlogic,meson-gx-pwm", "amlogic,meson-gxbb-pwm"; + compatible = "amlogic,meson-gx-ao-pwm", "amlogic,meson-gxbb-ao-pwm"; reg = <0x0 0x00550 0x0 0x10>; #pwm-cells = <3>; status = "disabled"; diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-khadas-vim.dts b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-khadas-vim.dts index 6a81f0168da5..371f43cdd3ab 100644 --- a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-khadas-vim.dts +++ b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-khadas-vim.dts @@ -86,8 +86,8 @@ status = "okay"; pinctrl-0 = <&pwm_ao_a_3_pins>, <&pwm_ao_b_pins>; pinctrl-names = "default"; - clocks = <&clkc CLKID_FCLK_DIV4>; - clock-names = "clkin0"; + clocks = <&xtal> , <&xtal>; + clock-names = "clkin0", "clkin1" ; }; &pwm_ef {
Use the specific compatible for AO pwms so the pwms input can be correctly set FDIV4 is not present on the pwm A0, so change kadhas vim input clocks to xtal. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> --- This patch depends on the pwm patchset available here [0] On the Khadas Vim I chose to replace FDIV4 with the crytal. Only PWM_AO_B is actually used and It is used for led dimming. The frequency, as long as it is high enough, does not matter. Only the duty cycle does. After testing, xtal seems to be fast enough. PWM_AO_A is outputed on the general purpose header, but no usage is defined for it. It might be bit late for that but I wonder why it defined and enabled ? Same goes for the other peripherals activated on this general purpose header. I know that's what shows the schematics but one could choose to do anything else possible with it ? like use in GPIO mode, or another function. In addition, we never which setting will be required ? (eg which clock source ?). Should we keep those ? or remove them ? Resend to correct the typo reported by Neil and update the dependency to the v2 of the pwm series. [0]: https://lkml.kernel.org/r/20170608122416.1993-1-jbrunet@baylibre.com arch/arm64/boot/dts/amlogic/meson-gx.dtsi | 2 +- arch/arm64/boot/dts/amlogic/meson-gxl-s905x-khadas-vim.dts | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-)