sd: fix sd boot up issue

1. add supports-emmc for sd card reboot fail issue
2. pull high maskrom rlease pin to detect emmc at sd boot up device

Change-Id: I94a1e78ff1321a2a8666136d20bbab60b9c9cd03

Author: Andy3Kuo

arch/arm/boot/dts/rk3288-tinker-board.dts

@@ -148,6 +148,13 @@
 		};
 	};
 
+	sdmmc_pwrseq: sdmmc-pwrseq {
+		compatible = "mmc-pwrseq-emmc";
+		pinctrl-0 = <&sdmmc_reset>;
+		pinctrl-names = "default";
+		reset-gpios = <&gpio6 RK_PA7 GPIO_ACTIVE_HIGH>;
+	};
+
 	sdio_pwrseq: sdio-pwrseq {
 		compatible = "mmc-pwrseq-simple";
 		clocks = <&rk808 1>;

arch/arm/boot/dts/rk3288-tinker-board.dtsi

@@ -230,7 +230,6 @@
 };
 
 &sdmmc {
-	supports-sd;
 	bus-width = <4>;
 	cap-mmc-highspeed;
 	sd-uhs-sdr12;
@@ -247,6 +246,8 @@
 	vmmc-supply = <&vcc33_sd>;
 	vqmmc-supply = <&vccio_sd>;
 	supports-sd;
+	supports-emmc;
+	mmc-pwrseq = <&sdmmc_pwrseq>;
 };
 
 &edp {
@@ -439,6 +440,12 @@
 		};
 	};
 
+	sdmmc-pwrseq {
+		sdmmc_reset: sdmmc-reset {
+			rockchip,pins = <6 7 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
 	sdio-pwrseq {
 		wifi_enable_h: wifi-enable-h {
 			rockchip,pins = <4 28 RK_FUNC_GPIO &pcfg_pull_none>;

drivers/mmc/core/pwrseq_emmc.c

@@ -27,9 +27,10 @@ struct mmc_pwrseq_emmc {
 
 static void __mmc_pwrseq_emmc_reset(struct mmc_pwrseq_emmc *pwrseq)
 {
-	gpiod_set_value(pwrseq->reset_gpio, 1);
-	udelay(1);
+	printk("%s: Enter\n", __func__);
 	gpiod_set_value(pwrseq->reset_gpio, 0);
+	udelay(1);
+	gpiod_set_value(pwrseq->reset_gpio, 1);
 	udelay(200);
 }