linux/arch/arm/boot/dts/omap3-igep0020.dts
Javier Martinez Canillas fd7e118c80 ARM: dts: omap3-igep0020: Use MMC pwrseq to init SDIO WiFi
When the WiFi support was added to the IGEP0020 board, the MMC subsystem
did not provide a mechanism to define power sequence providers. So a DT
hack was used to toggle the WiFi chip reset and power down pins by using
fake fixed regulators whose enable GPIO was the GPIOs connected to these
pins.

But now the simple MMC power sequence provider can be used for this and
the workaround removed.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Enric Balletbo Serra <enric.balletbo@collabora.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-12-07 16:11:10 -08:00

51 lines
1.5 KiB
Plaintext

/*
* Device Tree Source for IGEPv2 Rev. C (TI OMAP AM/DM37x)
*
* Copyright (C) 2012 Javier Martinez Canillas <javier@osg.samsung.com>
* Copyright (C) 2012 Enric Balletbo i Serra <eballetbo@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include "omap3-igep0020-common.dtsi"
/ {
model = "IGEPv2 Rev. C (TI OMAP AM/DM37x)";
compatible = "isee,omap3-igep0020", "ti,omap36xx", "ti,omap3";
vmmcsdio_fixed: fixedregulator-mmcsdio {
compatible = "regulator-fixed";
regulator-name = "vmmcsdio_fixed";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
};
mmc2_pwrseq: mmc2_pwrseq {
compatible = "mmc-pwrseq-simple";
reset-gpios = <&gpio5 11 GPIO_ACTIVE_LOW>, /* gpio_139 - RESET_N_W */
<&gpio5 10 GPIO_ACTIVE_LOW>; /* gpio_138 - WIFI_PDN */
};
};
&omap3_pmx_core {
lbee1usjyc_pins: pinmux_lbee1usjyc_pins {
pinctrl-single,pins = <
OMAP3_CORE1_IOPAD(0x2166, PIN_OUTPUT | MUX_MODE4) /* sdmmc2_dat5.gpio_137 - RESET_N_W */
OMAP3_CORE1_IOPAD(0x2168, PIN_OUTPUT | MUX_MODE4) /* sdmmc2_dat6.gpio_138 - WIFI_PDN */
OMAP3_CORE1_IOPAD(0x216a, PIN_OUTPUT | MUX_MODE4) /* sdmmc2_dat7.gpio_139 - RST_N_B */
>;
};
};
/* On board Wifi module */
&mmc2 {
pinctrl-names = "default";
pinctrl-0 = <&mmc2_pins &lbee1usjyc_pins>;
vmmc-supply = <&vmmcsdio_fixed>;
mmc-pwrseq = <&mmc2_pwrseq>;
bus-width = <4>;
non-removable;
};