From: prabhu annabathula <prabhu.annabathula@motorola.com>
Date: Mon, 25 Oct 2010 18:31:59 +0000 (-0500)
Subject: [ARM] tegra: stingray: pull up on TEGRA_PINGROUP_SDIO1 (UARTE)
X-Git-Tag: firefly_0821_release~9834^2~403
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d51b8bb6dec3b18821d688889f2657502b8f5d3f;p=firefly-linux-kernel-4.4.55.git

[ARM] tegra: stingray: pull up on TEGRA_PINGROUP_SDIO1 (UARTE)

UARTE used by GPS is changed to  4-wire connect between
Broadcom chip and Tegra from P3 hardwares.
uart5_cts_n is not connected in hardware versions < P3, pull down
on cts line pin to keep it low in hardware versions < P3.

Signed-off-by: prabhu annabathula <prabhu.annabathula@motorola.com>
---

diff --git a/arch/arm/mach-tegra/board-stingray-gps.c b/arch/arm/mach-tegra/board-stingray-gps.c
index abad68d8fe16..80c8811638db 100755
--- a/arch/arm/mach-tegra/board-stingray-gps.c
+++ b/arch/arm/mach-tegra/board-stingray-gps.c
@@ -20,10 +20,12 @@
 #include <linux/gps-gpio-brcm4750.h>
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
+#include "board-stingray.h"
 #include "gpio-names.h"
 
 #define STINGRAY_GPS_RESET	TEGRA_GPIO_PH0
 #define STINGRAY_GPS_STANDBY  TEGRA_GPIO_PH1
+#define STINGRAY_GPS_UART_CTS  TEGRA_GPIO_PY6
 
 static void stingray_gps_reset_gpio(unsigned int gpio_val)
 {
@@ -52,6 +54,13 @@ static void stingray_gps_gpio_init(void)
 	tegra_gpio_enable(STINGRAY_GPS_STANDBY);
 	gpio_request(STINGRAY_GPS_STANDBY, "gps_stdby");
 	gpio_direction_output(STINGRAY_GPS_STANDBY, 0);
+
+	if (stingray_revision() < STINGRAY_REVISION_P3) {
+		tegra_gpio_enable(STINGRAY_GPS_UART_CTS);
+		gpio_request(STINGRAY_GPS_UART_CTS, "uarte_cts");
+		gpio_direction_output(STINGRAY_GPS_UART_CTS, 0);
+		gpio_set_value(STINGRAY_GPS_UART_CTS, 0);
+	}
 }
 
 struct gps_gpio_brcm4750_platform_data stingray_gps_gpio_data = {
diff --git a/arch/arm/mach-tegra/board-stingray-pinmux.c b/arch/arm/mach-tegra/board-stingray-pinmux.c
index 70f38d15c7fc..d3437bf68739 100644
--- a/arch/arm/mach-tegra/board-stingray-pinmux.c
+++ b/arch/arm/mach-tegra/board-stingray-pinmux.c
@@ -109,7 +109,7 @@ static __initdata struct tegra_pingroup_config stingray_pinmux[] = {
 	{TEGRA_PINGROUP_SDB,   TEGRA_MUX_SDIO3,         TEGRA_PUPD_NORMAL,    TEGRA_TRI_NORMAL},
 	{TEGRA_PINGROUP_SDC,   TEGRA_MUX_SDIO3,         TEGRA_PUPD_PULL_UP,   TEGRA_TRI_NORMAL},
 	{TEGRA_PINGROUP_SDD,   TEGRA_MUX_SDIO3,         TEGRA_PUPD_PULL_UP,   TEGRA_TRI_NORMAL},
-	{TEGRA_PINGROUP_SDIO1, TEGRA_MUX_UARTE,         TEGRA_PUPD_PULL_DOWN, TEGRA_TRI_NORMAL},
+	{TEGRA_PINGROUP_SDIO1, TEGRA_MUX_UARTE,         TEGRA_PUPD_PULL_UP,   TEGRA_TRI_NORMAL},
 	{TEGRA_PINGROUP_SLXA,  TEGRA_MUX_SAFE,          TEGRA_PUPD_NORMAL,    TEGRA_TRI_NORMAL},
 	{TEGRA_PINGROUP_SLXC,  TEGRA_MUX_SAFE,          TEGRA_PUPD_NORMAL,    TEGRA_TRI_NORMAL},
 	{TEGRA_PINGROUP_SLXD,  TEGRA_MUX_SPDIF,         TEGRA_PUPD_NORMAL,    TEGRA_TRI_NORMAL},