ARM: tegra: stingray: Enable NCT1008 temperature monitor

From Varun Wadekar and Dmitriy Gruzman, plus changes to pass
NCT1008 alarm function from platform data.

Change-Id: I4b625e9278a9c214c71ee8859316bb1a9a9bfd91
Signed-off-by: Todd Poynor <toddpoynor@google.com>

diff --git a/arch/arm/mach-tegra/board-stingray-sensors.c b/arch/arm/mach-tegra/board-stingray-sensors.c
index d0af4637c241be80ce2ee0ddd99c0af5863fed99..5f78bab66e545cd045ba25deea47f6d39346d76c 100755 (executable)
--- a/arch/arm/mach-tegra/board-stingray-sensors.c
+++ b/arch/arm/mach-tegra/board-stingray-sensors.c
@@ -30,10 +30,10 @@
 #include <media/ov5650.h>
 #include <media/soc2030.h>
 #include <linux/platform_device.h>
+#include <linux/gpio.h>
 
 #include <linux/regulator/consumer.h>
-
-#include <mach/gpio.h>
+#include <linux/nct1008.h>
 
 #include "board-stingray.h"
 #include "gpio-names.h"
@@ -49,6 +49,9 @@
 #define SOC2030_RESETN_GPIO    TEGRA_GPIO_PD5
 #define SOC2030_PWRDN_GPIO     TEGRA_GPIO_PBB5
 #define CAP_PROX_IRQ_GPIO      TEGRA_GPIO_PZ3
+#define NCT1008_THERM2_GPIO    TEGRA_GPIO_PQ7
+
+extern void tegra_throttling_enable(bool enable);
 
 static int stingray_ov5650_power_on(void)
 {
@@ -343,6 +346,30 @@ static void stingray_lm3559_init(void)
        #endif
 }
 
+static struct nct1008_platform_data stingray_nct1008_data = {
+       .supported_hwrev = true,
+       .ext_range = true,
+       .conv_rate = 0x08,
+       .offset = 6,
+       .hysteresis = 5,
+       .shutdown_ext_limit = 115,
+       .shutdown_local_limit = 120,
+       .throttling_ext_limit = 90,
+       .alarm_fn = tegra_throttling_enable,
+};
+
+static int stingray_nct1008_init(void)
+{
+       if (stingray_revision() >= STINGRAY_REVISION_P2) {
+               tegra_gpio_enable(NCT1008_THERM2_GPIO);
+               gpio_request(NCT1008_THERM2_GPIO, "nct1008_therm2");
+               gpio_direction_input(NCT1008_THERM2_GPIO);
+       } else {
+               stingray_nct1008_data.supported_hwrev = false;
+       }
+       return 0;
+}
+
 static struct i2c_board_info __initdata stingray_i2c_bus4_sensor_info[] = {
        {
                I2C_BOARD_INFO("akm8975", 0x0C),
@@ -355,6 +382,8 @@ static struct i2c_board_info __initdata stingray_i2c_bus4_sensor_info[] = {
        },
        {
                I2C_BOARD_INFO("nct1008", 0x4C),
+               .platform_data = &stingray_nct1008_data,
+               .irq = TEGRA_GPIO_TO_IRQ(NCT1008_THERM2_GPIO),
        },
        {
                I2C_BOARD_INFO("cap-prox", 0x12),
@@ -414,6 +443,7 @@ int __init stingray_sensors_init(void)
        stingray_ov5650_init();
        stingray_soc2030_init();
        stingray_cap_prox_init();
+       stingray_nct1008_init();
 
        i2c_register_board_info(3, stingray_i2c_bus4_sensor_info,
                ARRAY_SIZE(stingray_i2c_bus4_sensor_info));