ARM: dts: am335x-evmsk: enable display and lcd panel support

Add the necessary nodes to enable the LCD controller and the
LCD panel that is attached to the Texas Instruments AM335x
EVMSK platform.  Also setup the necessary pin mux within the
DT file to drive the LCD connector and add the correct
pinmux settings for the lcd pins to be configured to when
the SoC goes into sleep state for the minimum power
consumption.

For the sleep mode LCD pin settings, MUX_MODE7 is chosen as
this corresponds to switching the pins into input GPIO's with
an internal pulldown.  Which has been determined to offer the
lowest power solution vs leaving the pins configured in LCD
mode.

Signed-off-by: Darren Etheridge <detheridge@ti.com>
Acked-by: Wolfram Sang <wsa@sang-engineering.com>
Tested-by: Felipe Balbi <balbi@ti.com>
Acked-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/boot/dts/am335x-evmsk.dts b/arch/arm/boot/dts/am335x-evmsk.dts
index ab9a34c..59766e2 100644 (file)
--- a/arch/arm/boot/dts/am335x-evmsk.dts
+++ b/arch/arm/boot/dts/am335x-evmsk.dts
@@ -149,12 +149,113 @@
                        "Headphone Jack",       "HPLOUT",
                        "Headphone Jack",       "HPROUT";
        };
+
+       panel {
+               compatible = "ti,tilcdc,panel";
+               pinctrl-names = "default", "sleep";
+               pinctrl-0 = <&lcd_pins_default>;
+               pinctrl-1 = <&lcd_pins_sleep>;
+               status = "okay";
+               panel-info {
+                       ac-bias           = <255>;
+                       ac-bias-intrpt    = <0>;
+                       dma-burst-sz      = <16>;
+                       bpp               = <32>;
+                       fdd               = <0x80>;
+                       sync-edge         = <0>;
+                       sync-ctrl         = <1>;
+                       raster-order      = <0>;
+                       fifo-th           = <0>;
+               };
+               display-timings {
+                       480x272 {
+                               hactive         = <480>;
+                               vactive         = <272>;
+                               hback-porch     = <43>;
+                               hfront-porch    = <8>;
+                               hsync-len       = <4>;
+                               vback-porch     = <12>;
+                               vfront-porch    = <4>;
+                               vsync-len       = <10>;
+                               clock-frequency = <9000000>;
+                               hsync-active    = <0>;
+                               vsync-active    = <0>;
+                       };
+               };
+       };
 };
 
 &am33xx_pinmux {
        pinctrl-names = "default";
        pinctrl-0 = <&gpio_keys_s0 &clkout2_pin>;
 
+       lcd_pins_default: lcd_pins_default {
+               pinctrl-single,pins = <
+                       0x20 (PIN_OUTPUT | MUX_MODE1)   /* gpmc_ad8.lcd_data23 */
+                       0x24 (PIN_OUTPUT | MUX_MODE1)   /* gpmc_ad9.lcd_data22 */
+                       0x28 (PIN_OUTPUT | MUX_MODE1)   /* gpmc_ad10.lcd_data21 */
+                       0x2c (PIN_OUTPUT | MUX_MODE1)   /* gpmc_ad11.lcd_data20 */
+                       0x30 (PIN_OUTPUT | MUX_MODE1)   /* gpmc_ad12.lcd_data19 */
+                       0x34 (PIN_OUTPUT | MUX_MODE1)   /* gpmc_ad13.lcd_data18 */
+                       0x38 (PIN_OUTPUT | MUX_MODE1)   /* gpmc_ad14.lcd_data17 */
+                       0x3c (PIN_OUTPUT | MUX_MODE1)   /* gpmc_ad15.lcd_data16 */
+                       0xa0 (PIN_OUTPUT | MUX_MODE0)   /* lcd_data0.lcd_data0 */
+                       0xa4 (PIN_OUTPUT | MUX_MODE0)   /* lcd_data1.lcd_data1 */
+                       0xa8 (PIN_OUTPUT | MUX_MODE0)   /* lcd_data2.lcd_data2 */
+                       0xac (PIN_OUTPUT | MUX_MODE0)   /* lcd_data3.lcd_data3 */
+                       0xb0 (PIN_OUTPUT | MUX_MODE0)   /* lcd_data4.lcd_data4 */
+                       0xb4 (PIN_OUTPUT | MUX_MODE0)   /* lcd_data5.lcd_data5 */
+                       0xb8 (PIN_OUTPUT | MUX_MODE0)   /* lcd_data6.lcd_data6 */
+                       0xbc (PIN_OUTPUT | MUX_MODE0)   /* lcd_data7.lcd_data7 */
+                       0xc0 (PIN_OUTPUT | MUX_MODE0)   /* lcd_data8.lcd_data8 */
+                       0xc4 (PIN_OUTPUT | MUX_MODE0)   /* lcd_data9.lcd_data9 */
+                       0xc8 (PIN_OUTPUT | MUX_MODE0)   /* lcd_data10.lcd_data10 */
+                       0xcc (PIN_OUTPUT | MUX_MODE0)   /* lcd_data11.lcd_data11 */
+                       0xd0 (PIN_OUTPUT | MUX_MODE0)   /* lcd_data12.lcd_data12 */
+                       0xd4 (PIN_OUTPUT | MUX_MODE0)   /* lcd_data13.lcd_data13 */
+                       0xd8 (PIN_OUTPUT | MUX_MODE0)   /* lcd_data14.lcd_data14 */
+                       0xdc (PIN_OUTPUT | MUX_MODE0)   /* lcd_data15.lcd_data15 */
+                       0xe0 (PIN_OUTPUT | MUX_MODE0)   /* lcd_vsync.lcd_vsync */
+                       0xe4 (PIN_OUTPUT | MUX_MODE0)   /* lcd_hsync.lcd_hsync */
+                       0xe8 (PIN_OUTPUT | MUX_MODE0)   /* lcd_pclk.lcd_pclk */
+                       0xec (PIN_OUTPUT | MUX_MODE0)   /* lcd_ac_bias_en.lcd_ac_bias_en */
+               >;
+       };
+
+       lcd_pins_sleep: lcd_pins_sleep {
+               pinctrl-single,pins = <
+                       0x20 (PIN_INPUT_PULLDOWN | MUX_MODE7)   /* gpmc_ad8.lcd_data23 */
+                       0x24 (PIN_INPUT_PULLDOWN | MUX_MODE7)   /* gpmc_ad9.lcd_data22 */
+                       0x28 (PIN_INPUT_PULLDOWN | MUX_MODE7)   /* gpmc_ad10.lcd_data21 */
+                       0x2c (PIN_INPUT_PULLDOWN | MUX_MODE7)   /* gpmc_ad11.lcd_data20 */
+                       0x30 (PIN_INPUT_PULLDOWN | MUX_MODE7)   /* gpmc_ad12.lcd_data19 */
+                       0x34 (PIN_INPUT_PULLDOWN | MUX_MODE7)   /* gpmc_ad13.lcd_data18 */
+                       0x38 (PIN_INPUT_PULLDOWN | MUX_MODE7)   /* gpmc_ad14.lcd_data17 */
+                       0x3c (PIN_INPUT_PULLDOWN | MUX_MODE7)   /* gpmc_ad15.lcd_data16 */
+                       0xa0 (PULL_DISABLE | MUX_MODE7) /* lcd_data0.lcd_data0 */
+                       0xa4 (PULL_DISABLE | MUX_MODE7) /* lcd_data1.lcd_data1 */
+                       0xa8 (PULL_DISABLE | MUX_MODE7) /* lcd_data2.lcd_data2 */
+                       0xac (PULL_DISABLE | MUX_MODE7) /* lcd_data3.lcd_data3 */
+                       0xb0 (PULL_DISABLE | MUX_MODE7) /* lcd_data4.lcd_data4 */
+                       0xb4 (PULL_DISABLE | MUX_MODE7) /* lcd_data5.lcd_data5 */
+                       0xb8 (PULL_DISABLE | MUX_MODE7) /* lcd_data6.lcd_data6 */
+                       0xbc (PULL_DISABLE | MUX_MODE7) /* lcd_data7.lcd_data7 */
+                       0xc0 (PULL_DISABLE | MUX_MODE7) /* lcd_data8.lcd_data8 */
+                       0xc4 (PULL_DISABLE | MUX_MODE7) /* lcd_data9.lcd_data9 */
+                       0xc8 (PULL_DISABLE | MUX_MODE7) /* lcd_data10.lcd_data10 */
+                       0xcc (PULL_DISABLE | MUX_MODE7) /* lcd_data11.lcd_data11 */
+                       0xd0 (PULL_DISABLE | MUX_MODE7) /* lcd_data12.lcd_data12 */
+                       0xd4 (PULL_DISABLE | MUX_MODE7) /* lcd_data13.lcd_data13 */
+                       0xd8 (PULL_DISABLE | MUX_MODE7) /* lcd_data14.lcd_data14 */
+                       0xdc (PULL_DISABLE | MUX_MODE7) /* lcd_data15.lcd_data15 */
+                       0xe0 (PIN_INPUT_PULLDOWN | MUX_MODE7)   /* lcd_vsync.lcd_vsync */
+                       0xe4 (PIN_INPUT_PULLDOWN | MUX_MODE7)   /* lcd_hsync.lcd_hsync */
+                       0xe8 (PIN_INPUT_PULLDOWN | MUX_MODE7)   /* lcd_pclk.lcd_pclk */
+                       0xec (PIN_INPUT_PULLDOWN | MUX_MODE7)   /* lcd_ac_bias_en.lcd_ac_bias_en */
+               >;
+       };
+
+
        user_leds_s0: user_leds_s0 {
                pinctrl-single,pins = <
                        0x10 (PIN_OUTPUT_PULLDOWN | MUX_MODE7)  /* gpmc_ad4.gpio1_4 */
@@ -573,3 +674,7 @@
                ti,wire-config = <0x00 0x11 0x22 0x33>;
        };
 };
+
+&lcdc {
+      status = "okay";
+};