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Subject[PATCH 1/8] ARM: dts: am335x-sl50: update backlight nodes
Date
This patch updates the backlight nodes to improve the support and describe
better how hardware is done. The changes done were:

* Use PWM_POLARITY_INVERTED instead of the hardcoded number.
* Add pinctrl configuration.
* Add the enable gpio definition.
* Add the power supply definition.
* Add more brightness levels.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
---

arch/arm/boot/dts/am335x-sl50.dts | 61 ++++++++++++++++++++++++++++---
1 file changed, 55 insertions(+), 6 deletions(-)

diff --git a/arch/arm/boot/dts/am335x-sl50.dts b/arch/arm/boot/dts/am335x-sl50.dts
index ddfa7192afd5..6d78bf828bbf 100644
--- a/arch/arm/boot/dts/am335x-sl50.dts
+++ b/arch/arm/boot/dts/am335x-sl50.dts
@@ -5,6 +5,7 @@
/dts-v1/;

#include "am33xx.dtsi"
+#include <dt-bindings/pwm/pwm.h>

/ {
model = "Toby Churchill SL50 Series";
@@ -57,16 +58,44 @@

backlight0: disp0 {
compatible = "pwm-backlight";
- pwms = <&ehrpwm1 0 500000 0>;
- brightness-levels = <0 10 20 30 40 50 60 70 80 90 99>;
- default-brightness-level = <6>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&backlight0_pins>;
+ pwms = <&ehrpwm1 0 500000 PWM_POLARITY_INVERTED>;
+ brightness-levels = < 0 1 2 3 4 5 6 7 8 9
+ 10 11 12 13 14 15 16 17 18 19
+ 20 21 22 23 24 25 26 27 28 29
+ 30 31 32 33 34 35 36 37 38 39
+ 40 41 42 43 44 45 46 47 48 49
+ 50 51 52 53 54 55 56 57 58 59
+ 60 61 62 63 64 65 66 67 68 69
+ 70 71 72 73 74 75 76 77 78 79
+ 80 81 82 83 84 85 86 87 88 89
+ 90 91 92 93 94 95 96 97 98 99
+ 100>;
+ default-brightness-level = <50>;
+ enable-gpios = <&gpio2 4 GPIO_ACTIVE_HIGH>;
+ power-supply = <&vdd_sys_reg>;
};

backlight1: disp1 {
compatible = "pwm-backlight";
- pwms = <&ehrpwm1 1 500000 0>;
- brightness-levels = <0 10 20 30 40 50 60 70 80 90 99>;
- default-brightness-level = <6>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&backlight1_pins>;
+ pwms = <&ehrpwm1 1 500000 PWM_POLARITY_INVERTED>;
+ brightness-levels = < 0 1 2 3 4 5 6 7 8 9
+ 10 11 12 13 14 15 16 17 18 19
+ 20 21 22 23 24 25 26 27 28 29
+ 30 31 32 33 34 35 36 37 38 39
+ 40 41 42 43 44 45 46 47 48 49
+ 50 51 52 53 54 55 56 57 58 59
+ 60 61 62 63 64 65 66 67 68 69
+ 70 71 72 73 74 75 76 77 78 79
+ 80 81 82 83 84 85 86 87 88 89
+ 90 91 92 93 94 95 96 97 98 99
+ 100>;
+ default-brightness-level = <50>;
+ enable-gpios = <&gpio0 26 GPIO_ACTIVE_HIGH>;
+ power-supply = <&vdd_sys_reg>;
};

clocks {
@@ -105,6 +134,14 @@
reset-gpios = <&gpio1 20 GPIO_ACTIVE_LOW>;
};

+ vdd_sys_reg: regulator@0 {
+ compatible = "regulator-fixed";
+ regulator-name = "vdd_sys_reg";
+ regulator-min-microvolt = <5000000>;
+ regulator-max-microvolt = <5000000>;
+ regulator-always-on;
+ };
+
vmmcsd_fixed: fixedregulator0 {
compatible = "regulator-fixed";
regulator-name = "vmmcsd_fixed";
@@ -117,6 +154,18 @@
pinctrl-names = "default";
pinctrl-0 = <&lwb_pins>;

+ backlight0_pins: pinmux_backlight0_pins {
+ pinctrl-single,pins = <
+ AM33XX_IOPAD(0x898, PIN_OUTPUT | MUX_MODE7) /* gpmc_wen.gpio2_4 */
+ >;
+ };
+
+ backlight1_pins: pinmux_backlight1_pins {
+ pinctrl-single,pins = <
+ AM33XX_IOPAD(0x828, PIN_OUTPUT | MUX_MODE7) /* gpmc_ad10.gpio0_26 */
+ >;
+ };
+
led_pins: pinmux_led_pins {
pinctrl-single,pins = <
AM33XX_IOPAD(0x854, PIN_OUTPUT | MUX_MODE7) /* gpmc_a5.gpio1_21 */
--
2.17.1
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