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ARM: dts: am437x-gp-evm: Add gpio-hog for configuring the display/audio mux

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GPIO5_8 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>
This commit is contained in:
Peter Ujfalusi 2015-07-02 17:06:24 +03:00 committed by Tony Lindgren
parent 22d7fb57ad
commit 593113e7bc
1 changed files with 15 additions and 12 deletions
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27
arch/arm/boot/dts/am437x-gp-evm.dts
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@ -83,17 +83,6 @@
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 = <&gpio5 8 GPIO_ACTIVE_HIGH>;
panel-timing {
clock-frequency = <33000000>;
hactive = <800>;
@ -270,7 +259,7 @@
>;
};
lcd_pins: lcd_pins {
display_mux_pins: display_mux_pins {
pinctrl-single,pins = <
/* GPIO 5_8 to select LCD / HDMI */
0x238 (PIN_OUTPUT_PULLUP | MUX_MODE7)
@ -558,8 +547,22 @@
};
&gpio5 {
pinctrl-names = "default";
pinctrl-0 = <&display_mux_pins>;
status = "okay";
ti,no-reset-on-init;
p8 {
/*
* 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 = <8 GPIO_ACTIVE_HIGH>;
output-high;
line-name = "SelLCDorHDMI";
};
};
&mmc1 {