@@ -229,6 +229,14 @@
power-supply = <&fet6>;
backlight = <&backlight>;
};
+
+ mmc3_pwrseq: mmc3_pwrseq {
+ compatible = "mmc-pwrseq-simple";
+ reset-gpios = <&gpx0 2 GPIO_ACTIVE_LOW>, /* WIFI_RSTn */
+ <&gpx0 1 GPIO_ACTIVE_LOW>; /* WIFI_EN */
+ clocks = <&max77686 MAX77686_CLK_PMIC>;
+ clock-names = "ext_clock";
+ };
};
&dp {
@@ -536,12 +544,27 @@
samsung,dw-mshc-sdr-timing = <2 3>;
samsung,dw-mshc-ddr-timing = <1 2>;
pinctrl-names = "default";
- pinctrl-0 = <&sd3_clk &sd3_cmd &sd3_bus4>;
+ pinctrl-0 = <&sd3_clk &sd3_cmd &sd3_bus4 &wifi_en &wifi_rst>;
bus-width = <4>;
cap-sd-highspeed;
+ mmc-pwrseq = <&mmc3_pwrseq>;
};
&pinctrl_0 {
+ wifi_en: wifi-en {
+ samsung,pins = "gpx0-1";
+ samsung,pin-function = <1>;
+ samsung,pin-pud = <0>;
+ samsung,pin-drv = <0>;
+ };
+
+ wifi_rst: wifi-rst {
+ samsung,pins = "gpx0-2";
+ samsung,pin-function = <1>;
+ samsung,pin-pud = <0>;
+ samsung,pin-drv = <0>;
+ };
+
power_key_irq: power-key-irq {
samsung,pins = "gpx1-3";
samsung,pin-function = <0xf>;
The Snow board has a MMC/SDIO wifi chip that is always powered but it needs a power sequence involving a reset (active low) and an enable (active high) pins. Both pins are marked as active low since the MMC simple power sequence driver asserts the pins prior to the card power up procedure and de-asserts the pins after the card has been powered. So the reset line will be left de-asserted and the enable pin will be left asserted. The chip also needs an external 32kHz reference clock to be operational that is by the MAX77686 PMIC clock. Add a simple MMC power sequence provider for the wifi MMC/SDIO slot. Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk> --- Changes since v2: None. Changes since v1: - Remove cap-sdio-irq from mmc3 dev node since is a separate change. Suggested by Arend van Spriel. --- arch/arm/boot/dts/exynos5250-snow.dts | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-)