diff mbox

[V1,07/11] ARM: dts: imx6qdl-sabrelite: add pwms for backlights

Message ID 1386899355-17379-8-git-send-email-troy.kisky@boundarydevices.com (mailing list archive)
State New, archived
Headers show

Commit Message

Troy Kisky Dec. 13, 2013, 1:49 a.m. UTC 
add pwm1 for lcd backlight
add pwm4 for lvds backlight
add pwm3 for ov5640 mipi clock

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
---
 arch/arm/boot/dts/imx6qdl-sabrelite.dtsi | 54 ++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)

Comments

Marek Vasut Dec. 13, 2013, 11:53 a.m. UTC | #1 
On Friday, December 13, 2013 at 02:49:11 AM, Troy Kisky wrote:
> add pwm1 for lcd backlight
> add pwm4 for lvds backlight
> add pwm3 for ov5640 mipi clock

The camera needs a PWM ? I am a little surprised by such a design, but I might 
just be lacking knowledge.

Best regards,
Marek Vasut
Eric Nelson Dec. 13, 2013, 2:09 p.m. UTC | #2 
Hi Marek,

On 12/13/2013 04:53 AM, Marek Vasut wrote:
> On Friday, December 13, 2013 at 02:49:11 AM, Troy Kisky wrote:
>> add pwm1 for lcd backlight
>> add pwm4 for lvds backlight
>> add pwm3 for ov5640 mipi clock
>
> The camera needs a PWM ? I am a little surprised by such a design, but I might
> just be lacking knowledge.
>

The PWM is used to provide a clock to the camera (with a constant
50% duty cycle).

We do the same with our parallel camera interface, avoiding
external oscillators.

Regards,


Eric
diff mbox

Patch

diff --git a/arch/arm/boot/dts/imx6qdl-sabrelite.dtsi b/arch/arm/boot/dts/imx6qdl-sabrelite.dtsi
index fa10ded..ac33d94 100644
--- a/arch/arm/boot/dts/imx6qdl-sabrelite.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-sabrelite.dtsi
@@ -103,6 +103,24 @@ 
 		mux-int-port = <1>;
 		mux-ext-port = <4>;
 	};
+
+	backlight_lcd {
+		compatible = "pwm-backlight";
+		pwms = <&pwm1 0 5000000>;
+		brightness-levels = <0 4 8 16 32 64 128 255>;
+		default-brightness-level = <7>;
+		power-supply = <&reg_3p3v>;
+		status = "okay";
+	};
+
+	backlight_lvds {
+		compatible = "pwm-backlight";
+		pwms = <&pwm4 0 5000000>;
+		brightness-levels = <0 4 8 16 32 64 128 255>;
+		default-brightness-level = <7>;
+		power-supply = <&reg_3p3v>;
+		status = "okay";
+	};
 };
 
 &audmux {
@@ -187,6 +205,24 @@ 
 			fsl,pins = <MX6QDL_I2C1_PINGRP1>;
 		};
 
+		pinctrl_pwm1: pwm1grp {
+			fsl,pins = <
+				MX6QDL_PAD_SD1_DAT3__PWM1_OUT 0x1b0b1
+			>;
+		};
+
+		pinctrl_pwm3: pwm3grp {
+			fsl,pins = <
+				MX6QDL_PAD_SD1_DAT1__PWM3_OUT 0x1b0b1
+			>;
+		};
+
+		pinctrl_pwm4: pwm4grp {
+			fsl,pins = <
+				MX6QDL_PAD_SD1_CMD__PWM4_OUT 0x1b0b1
+			>;
+		};
+
 		pinctrl_uart1: uart1grp {
 			fsl,pins = <MX6QDL_UART1_PINGRP2>;
 		};
@@ -234,6 +270,24 @@ 
 	};
 };
 
+&pwm1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pwm1>;
+	status = "okay";
+};
+
+&pwm3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pwm3>;
+	status = "okay";
+};
+
+&pwm4 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pwm4>;
+	status = "okay";
+};
+
 &ssi1 {
 	fsl,mode = "i2s-slave";
 	status = "okay";