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dts/zero-sugar: use fixed regulator to manage WIFI_PWR_EN 

Besides WIFI_REG_ON handled by wifi_pwrseq, we need to deal with
WIFI_PWR_EN as well to get BCM43455 WiFi chip powered properly.  This
WIFI_PWR_EN is currently handled in U-Boot.  As we have fixed-regulator
infrastructure in kernel which can handle this nicely, let's use it, so
that we can drop the code from U-Boot.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
pull/10/head
Shawn Guo 2019-08-29 12:32:38 +02:00 committed by Steinar Bakkemo
parent c2ab64fc4e
commit 8ccf9125f6
1 changed files with 20 additions and 0 deletions
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20
arch/arm/boot/dts/zero-sugar.dts
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@ -63,6 +63,18 @@
regulator-max-microvolt = <1800000>;
};
reg_brcm: regulator-brcm {
compatible = "regulator-fixed";
regulator-name = "brcm_reg";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_brcm_reg>;
gpio = <&gpio6 13 GPIO_ACTIVE_HIGH>;
enable-active-high;
};
wifi_pwrseq: wifi_pwrseq {
compatible = "mmc-pwrseq-simple";
pinctrl-names = "default";
@ -512,6 +524,7 @@
pinctrl-0 = <&pinctrl_usdhc2>;
pinctrl-1 = <&pinctrl_usdhc2_100mhz>;
mmc-pwrseq = <&wifi_pwrseq>;
vmmc-supply = <&reg_brcm>;
bus-width = <4>;
non-removable;
keep-power-in-suspend;
@ -727,6 +740,13 @@
>;
};
pinctrl_brcm_reg: brcmreggrp {
fsl,pins = <
/* WIFI_PWR_EN */
MX7D_PAD_SAI1_TX_BCLK__GPIO6_IO13 0x14
>;
};
pinctrl_wifi: wifigrp {
fsl,pins = <
/* WiFi Reg On */