diff options
| author | Roger Quadros <rogerq@ti.com> | 2015-08-04 18:34:59 +0300 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2015-08-05 13:58:27 +0300 |
| commit | 50336f5127640b1cc6a84c2a7853774a11e1e3c2 (patch) | |
| tree | 19c8b336a6a79487a809d5a9258fe528baf514a5 /arch/arm/boot/dts/am437x-gp-evm.dts | |
| parent | 92814c4a2cae0f9668bc6521cb51453a81a39299 (diff) | |
| download | linux-50336f5127640b1cc6a84c2a7853774a11e1e3c2.tar.xz | |
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>
Diffstat (limited to 'arch/arm/boot/dts/am437x-gp-evm.dts')
| -rw-r--r-- | arch/arm/boot/dts/am437x-gp-evm.dts | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/arch/arm/boot/dts/am437x-gp-evm.dts b/arch/arm/boot/dts/am437x-gp-evm.dts index 58cfad28f483..3c5985848eff 100644 --- a/arch/arm/boot/dts/am437x-gp-evm.dts +++ b/arch/arm/boot/dts/am437x-gp-evm.dts @@ -231,7 +231,6 @@ nand_flash_x8: nand_flash_x8 { pinctrl-single,pins = < - 0x26c(PIN_OUTPUT_PULLDOWN | MUX_MODE7) /* spi2_cs0.gpio/eMMCorNANDsel */ 0x0 (PIN_INPUT | MUX_MODE0) /* gpmc_ad0.gpmc_ad0 */ 0x4 (PIN_INPUT | MUX_MODE0) /* gpmc_ad1.gpmc_ad1 */ 0x8 (PIN_INPUT | MUX_MODE0) /* gpmc_ad2.gpmc_ad2 */ @@ -441,6 +440,12 @@ 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 { @@ -587,7 +592,23 @@ }; &gpio0 { + pinctrl-names = "default"; + pinctrl-0 = <&gpio0_pins>; 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 { |