ARM: dts: am335x-sl50: update backlight nodes

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>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/boot/dts/am335x-sl50.dts b/arch/arm/boot/dts/am335x-sl50.dts
index 1bcc60424ecd1eeb7134e7eb973dfc64f3bb9edf..dedf54d358ae49b11d8ec2d248e7c63ad79404fe 100644 (file)
--- a/arch/arm/boot/dts/am335x-sl50.dts
+++ b/arch/arm/boot/dts/am335x-sl50.dts
@@ -8,6 +8,7 @@
 /dts-v1/;
 
 #include "am33xx.dtsi"
+#include <dt-bindings/pwm/pwm.h>
 
 / {
        model = "Toby Churchill SL50 Series";
@@ -60,16 +61,44 @@ led3 {
 
        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 {
@@ -108,6 +137,14 @@ emmc_pwrseq: pwrseq@0 {
                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";
@@ -120,6 +157,18 @@ &am33xx_pinmux {
        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 */