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ARM: dts: am437x-gp-evm: Add gpio-hog for configuring eMMC/NAND driver 

On this board either eMMC or NAND can work based on the level of
spi2_cs0.gpio0_23. Add a gpio-hog to enable configuration of this
pin in the device tree.

Move pinmux for spi2_cs0 (SEL_eMMCorNANDn) out of
NAND node into gpio0 so it is initialized with gpio0.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Roger Quadros 2015-08-04 18:34:59 +03:00 committed by Tony Lindgren
parent 92814c4a2c
commit 50336f5127
1 changed files with 22 additions and 1 deletions
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23
arch/arm/boot/dts/am437x-gp-evm.dts
View File

@ -231,7 +231,6 @@
nand_flash_x8: nand_flash_x8 { nand_flash_x8: nand_flash_x8 {
pinctrl-single,pins = < pinctrl-single,pins = <
0x26c(PIN_OUTPUT_PULLDOWN | MUX_MODE7) /* spi2_cs0.gpio/eMMCorNANDsel */
0x0 (PIN_INPUT | MUX_MODE0) /* gpmc_ad0.gpmc_ad0 */ 0x0 (PIN_INPUT | MUX_MODE0) /* gpmc_ad0.gpmc_ad0 */
0x4 (PIN_INPUT | MUX_MODE0) /* gpmc_ad1.gpmc_ad1 */ 0x4 (PIN_INPUT | MUX_MODE0) /* gpmc_ad1.gpmc_ad1 */
0x8 (PIN_INPUT | MUX_MODE0) /* gpmc_ad2.gpmc_ad2 */ 0x8 (PIN_INPUT | MUX_MODE0) /* gpmc_ad2.gpmc_ad2 */
@ -441,6 +440,12 @@
0x144 (PIN_INPUT_PULLDOWN | MUX_MODE7) 0x144 (PIN_INPUT_PULLDOWN | MUX_MODE7)
>; >;
}; };
gpio0_pins: gpio0_pins {
pinctrl-single,pins = <
0x26c (PIN_OUTPUT | MUX_MODE9) /* spi2_cs0.gpio0_23 SEL_eMMCorNANDn */
>;
};
}; };
&i2c0 { &i2c0 {
@ -587,7 +592,23 @@
}; };
&gpio0 { &gpio0 {
pinctrl-names = "default";
pinctrl-0 = <&gpio0_pins>;
status = "okay"; status = "okay";
p23 {
gpio-hog;
gpios = <23 GPIO_ACTIVE_HIGH>;
/* SelEMMCorNAND selects between eMMC and NAND:
* Low: NAND
* High: eMMC
* When changing this line make sure the newly
* selected device node is enabled and the previously
* selected device node is disabled.
*/
output-low;
line-name = "SelEMMCorNAND";
};
}; };
&gpio1 { &gpio1 {