From: Caesar Wang <wxt@rock-chips.com>
Date: Fri, 15 Jan 2016 13:49:53 +0000 (+0800)
Subject: ARM: dts: rockchip: add the sdio power sequence for kylin board
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4a9d0b033702566cde2f33ed19ff9c8a90b7fe8f;p=linux-beck.git

ARM: dts: rockchip: add the sdio power sequence for kylin board

This patch adds the sdio power sequence for kylin board.
The WLAN attached to a SDIO interface, wifi/bluetooth have
reset and power been needed to enable.

AFAIK, the simple power sequence provider sets a value for multiple GPIOs.
So the reset and power of WlAN chip can be handled in mmc power sequence.
On the module itself this is one of these, that should can be handled
by reset GPIOs in simple mmc power sequence.

The Bluetooth host wake is high active from bootup, this patch is also
set pinctrl bias as the default to enable the pull up in soc internal.

Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---

diff --git a/arch/arm/boot/dts/rk3036-kylin.dts b/arch/arm/boot/dts/rk3036-kylin.dts
index 905e187da381..6a32b234525a 100644
--- a/arch/arm/boot/dts/rk3036-kylin.dts
+++ b/arch/arm/boot/dts/rk3036-kylin.dts
@@ -46,6 +46,23 @@
 	model = "Rockchip RK3036 KylinBoard";
 	compatible = "rockchip,rk3036-kylin", "rockchip,rk3036";
 
+	sdio_pwrseq: sdio-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		pinctrl-names = "default";
+		pinctrl-0 = <&bt_wake_h>;
+
+		/*
+		 * On the module itself this is one of these (depending
+		 * on the actual card populated):
+		 * - SDIO_RESET_L_WL_REG_ON
+		 * - SDIO_RESET_L_WL_RST
+		 * - SDIO_RESET_L_BT_EN
+		 */
+		reset-gpios = <&gpio0 26 GPIO_ACTIVE_LOW>, /* WL_REG_ON */
+			      <&gpio0 27 GPIO_ACTIVE_LOW>, /* WL_RST */
+			      <&gpio2 9  GPIO_ACTIVE_LOW>; /* BT_EN */
+	};
+
 	sound {
 		compatible = "simple-audio-card";
 		simple-audio-card,format = "i2s";
@@ -303,6 +320,7 @@
 	cap-sdio-irq;
 	default-sample-phase = <90>;
 	keep-power-in-suspend;
+	mmc-pwrseq = <&sdio_pwrseq>;
 	non-removable;
 	num-slots = <1>;
 	pinctrl-names = "default";
@@ -336,6 +354,12 @@
 		};
 	};
 
+	sdio {
+		bt_wake_h: bt-wake-h {
+			rockchip,pins = <2 8 RK_FUNC_GPIO &pcfg_pull_default>;
+		};
+	};
+
 	sleep {
 		global_pwroff: global-pwroff {
 			rockchip,pins = <2 7 RK_FUNC_1 &pcfg_pull_none>;