* [PATCH] arm64: dts: imx8qm-apalis: add pwm used by the backlight
@ 2025-10-31 12:55 max.oss.09
2025-11-16 12:13 ` Shawn Guo
0 siblings, 1 reply; 2+ messages in thread
From: max.oss.09 @ 2025-10-31 12:55 UTC (permalink / raw)
To: Max Krummenacher
Cc: Conor Dooley, Fabio Estevam, Krzysztof Kozlowski,
Pengutronix Kernel Team, Rob Herring, Sascha Hauer, Shawn Guo,
devicetree, imx, linux-arm-kernel, linux-kernel
From: Max Krummenacher <max.krummenacher@toradex.com>
Add pwm node used by the backlight output pin BKL1_PWM and
reference it from the pwm-backlight node.
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
---
arch/arm64/boot/dts/freescale/imx8-apalis-eval.dtsi | 5 ++++-
arch/arm64/boot/dts/freescale/imx8-apalis-ixora-v1.1.dtsi | 5 ++++-
arch/arm64/boot/dts/freescale/imx8-apalis-ixora-v1.2.dtsi | 5 ++++-
arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi | 7 +++++--
4 files changed, 17 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8-apalis-eval.dtsi b/arch/arm64/boot/dts/freescale/imx8-apalis-eval.dtsi
index 311d4950793c..06790255a764 100644
--- a/arch/arm64/boot/dts/freescale/imx8-apalis-eval.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8-apalis-eval.dtsi
@@ -109,7 +109,10 @@ &pciea {
status = "okay";
};
-/* TODO: Apalis BKL1_PWM */
+/* Apalis BKL1_PWM */
+&pwm_lvds1 {
+ status = "okay";
+};
/* Apalis DAP1 */
&sai1 {
diff --git a/arch/arm64/boot/dts/freescale/imx8-apalis-ixora-v1.1.dtsi b/arch/arm64/boot/dts/freescale/imx8-apalis-ixora-v1.1.dtsi
index 3d8731504ce1..7022de46b8bf 100644
--- a/arch/arm64/boot/dts/freescale/imx8-apalis-ixora-v1.1.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8-apalis-ixora-v1.1.dtsi
@@ -196,7 +196,10 @@ &pciea {
status = "okay";
};
-/* TODO: Apalis BKL1_PWM */
+/* Apalis BKL1_PWM */
+&pwm_lvds1 {
+ status = "okay";
+};
/* Apalis DAP1 */
&sai1 {
diff --git a/arch/arm64/boot/dts/freescale/imx8-apalis-ixora-v1.2.dtsi b/arch/arm64/boot/dts/freescale/imx8-apalis-ixora-v1.2.dtsi
index 106e802a68ba..12732ed7f811 100644
--- a/arch/arm64/boot/dts/freescale/imx8-apalis-ixora-v1.2.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8-apalis-ixora-v1.2.dtsi
@@ -245,7 +245,10 @@ &pciea {
status = "okay";
};
-/* TODO: Apalis BKL1_PWM */
+/* Apalis BKL1_PWM */
+&pwm_lvds1 {
+ status = "okay";
+};
/* Apalis DAP1 */
&sai1 {
diff --git a/arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi b/arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi
index 86d018f470c1..66261c0286d6 100644
--- a/arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi
@@ -18,7 +18,7 @@ backlight: backlight {
brightness-levels = <0 45 63 88 119 158 203 255>;
default-brightness-level = <4>;
enable-gpios = <&lsio_gpio1 4 GPIO_ACTIVE_HIGH>; /* Apalis BKL1_ON */
- /* TODO: hook-up to Apalis BKL1_PWM */
+ pwms = <&pwm_lvds1 0 6666667 PWM_POLARITY_INVERTED>;
status = "disabled";
};
@@ -799,7 +799,10 @@ &phyx2_lpcg {
<&hsio_refa_clk>, <&hsio_per_clk>;
};
-/* TODO: Apalis BKL1_PWM */
+&pwm_lvds1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_pwm_bkl>;
+};
/* Apalis DAP1 */
&sai1 {
--
2.42.0
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] arm64: dts: imx8qm-apalis: add pwm used by the backlight
2025-10-31 12:55 [PATCH] arm64: dts: imx8qm-apalis: add pwm used by the backlight max.oss.09
@ 2025-11-16 12:13 ` Shawn Guo
0 siblings, 0 replies; 2+ messages in thread
From: Shawn Guo @ 2025-11-16 12:13 UTC (permalink / raw)
To: max.oss.09
Cc: Max Krummenacher, Conor Dooley, Fabio Estevam,
Krzysztof Kozlowski, Pengutronix Kernel Team, Rob Herring,
Sascha Hauer, Shawn Guo, devicetree, imx, linux-arm-kernel,
linux-kernel
On Fri, Oct 31, 2025 at 01:55:07PM +0100, max.oss.09@gmail.com wrote:
> From: Max Krummenacher <max.krummenacher@toradex.com>
>
> Add pwm node used by the backlight output pin BKL1_PWM and
> reference it from the pwm-backlight node.
>
> Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Applied, thanks!
^ permalink raw reply [flat|nested] 2+ messages in thread
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2025-11-16 12:13 ` Shawn Guo
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