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authorMaxime Ripard <maxime.ripard@free-electrons.com>2015-07-22 16:51:33 +0200
committerMaxime Ripard <maxime.ripard@free-electrons.com>2016-11-22 15:33:54 +0100
commitbb1ea8bf1bed9048dc51cb0b9ccacd63fcb0a3a0 (patch)
tree006d699c7d7b350f3ca5da485c669b571b5186f0
parente63604933ec72b268444a59ca357b4e96449480b (diff)
ARM: sun5i: chip: Enable Wi-Fi SDIO chip
The WiFi chip is powered through a GPIO and two regulators in parallel. Since that case is not supported yet, just set them as always on before we rework the regulator framework to deal with those. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Chen-Yu Tsai <wens@csie.org>
-rw-r--r--arch/arm/boot/dts/sun5i-r8-chip.dts41
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/sun5i-r8-chip.dts b/arch/arm/boot/dts/sun5i-r8-chip.dts
index b68a123..e616084 100644
--- a/arch/arm/boot/dts/sun5i-r8-chip.dts
+++ b/arch/arm/boot/dts/sun5i-r8-chip.dts
@@ -74,6 +74,13 @@
default-state = "on";
};
};
+
+ mmc0_pwrseq: mmc0_pwrseq {
+ compatible = "mmc-pwrseq-simple";
+ pinctrl-names = "default";
+ pinctrl-0 = <&chip_wifi_reg_on_pin>;
+ reset-gpios = <&pio 2 19 GPIO_ACTIVE_LOW>; /* PC19 */
+ };
};
&be0 {
@@ -131,10 +138,15 @@
};
};
+&mmc0_pins_a {
+ allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
+};
+
&mmc0 {
pinctrl-names = "default";
pinctrl-0 = <&mmc0_pins_a>;
vmmc-supply = <&reg_vcc3v3>;
+ mmc-pwrseq = <&mmc0_pwrseq>;
bus-width = <4>;
non-removable;
status = "okay";
@@ -156,6 +168,13 @@
allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
};
+ chip_wifi_reg_on_pin: chip_wifi_reg_on_pin@0 {
+ allwinner,pins = "PC19";
+ allwinner,function = "gpio_out";
+ allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+ allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+ };
+
chip_id_det_pin: chip_id_det_pin@0 {
allwinner,pins = "PG2";
allwinner,function = "gpio_in";
@@ -189,6 +208,28 @@
regulator-always-on;
};
+/*
+ * Both LDO3 and LDO4 are used in parallel to power up the WiFi/BT
+ * Chip.
+ *
+ * If those are not enabled, the SDIO part will not enumerate, and
+ * since there's no way currently to pass DT infos to an SDIO device,
+ * we cannot really do better than this ugly hack for now.
+ */
+&reg_ldo3 {
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-name = "vcc-wifi-1";
+ regulator-always-on;
+};
+
+&reg_ldo4 {
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-name = "vcc-wifi-2";
+ regulator-always-on;
+};
+
&reg_ldo5 {
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;