linux-kernel - [PATCH] arm64: dts: imx8qm-apalis: add pwm used by the backlight

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20251031125510.433175-1-max.oss.09@gmail.com>
Date: Fri, 31 Oct 2025 13:55:07 +0100
From: max.oss.09@...il.com
To: Max Krummenacher <max.krummenacher@...adex.com>
Cc: Conor Dooley <conor+dt@...nel.org>,
	Fabio Estevam <festevam@...il.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Rob Herring <robh@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Shawn Guo <shawnguo@...nel.org>,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: imx8qm-apalis: add pwm used by the backlight

From: Max Krummenacher <max.krummenacher@...adex.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@...adex.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