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authorPeter Ujfalusi <peter.ujfalusi@ti.com>2015-07-02 17:06:19 +0300
committerTony Lindgren <tony@atomide.com>2015-07-14 04:25:04 -0700
commit56fd3dc793e9f53acf36411f5c9814997e587b3e (patch)
tree2d75174be4af03bf5eccda39da82cbb17cc1ee77 /arch/arm
parent20746c508b3a8e76e251806f8bd50c4624ca1782 (diff)
ARM: dts: am43xx-epos-evm: Add gpio-hog for configuring the display/audio mux
GPIO2_1 is used as a mux switch between LCD and HDMI displays. This mux affects audio routing as well since in LCD mode HDMI audio is not possible and when HDMI is selected analog audio is not working. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/boot/dts/am43x-epos-evm.dts27
1 files changed, 15 insertions, 12 deletions
diff --git a/arch/arm/boot/dts/am43x-epos-evm.dts b/arch/arm/boot/dts/am43x-epos-evm.dts
index 795d68af6df9..77919c570fe1 100644
--- a/arch/arm/boot/dts/am43x-epos-evm.dts
+++ b/arch/arm/boot/dts/am43x-epos-evm.dts
@@ -35,17 +35,6 @@
compatible = "osddisplays,osd057T0559-34ts", "panel-dpi";
label = "lcd";
- pinctrl-names = "default";
- pinctrl-0 = <&lcd_pins>;
-
- /*
- * SelLCDorHDMI, LOW to select HDMI. This is not really the
- * panel's enable GPIO, but we don't have HDMI driver support nor
- * support to switch between two displays, so using this gpio as
- * panel's enable should be safe.
- */
- enable-gpios = <&gpio2 1 GPIO_ACTIVE_HIGH>;
-
panel-timing {
clock-frequency = <33000000>;
hactive = <800>;
@@ -278,7 +267,7 @@
>;
};
- lcd_pins: lcd_pins {
+ display_mux_pins: display_mux_pins {
pinctrl-single,pins = <
/* GPMC CLK -> GPIO 2_1 to select LCD / HDMI */
0x08C (PIN_OUTPUT_PULLUP | MUX_MODE7)
@@ -458,7 +447,21 @@
};
&gpio2 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&display_mux_pins>;
status = "okay";
+
+ p1 {
+ /*
+ * SelLCDorHDMI selects between display and audio paths:
+ * Low: HDMI display with audio via HDMI
+ * High: LCD display with analog audio via aic3111 codec
+ */
+ gpio-hog;
+ gpios = <1 GPIO_ACTIVE_HIGH>;
+ output-high;
+ line-name = "SelLCDorHDMI";
+ };
};
&gpio3 {