[PATCH v2 4/4] Exynos4 NURI: support for NTC thermistor

MyungJoo Ham
2011-06-21T02:07:24Z

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
---
arch/arm/mach-exynos4/mach-nuri.c | 46 +++++++++++++++++++++++++++++++++++++
1 files changed, 46 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-exynos4/mach-nuri.c b/arch/arm/mach-exynos4/mach-nuri.c
index 51f55b4..dc6fc36 100644
--- a/arch/arm/mach-exynos4/mach-nuri.c
+++ b/arch/arm/mach-exynos4/mach-nuri.c
@@ -16,6 +16,7 @@
#include <linux/i2c-gpio.h>
#include <linux/gpio_keys.h>
#include <linux/gpio.h>
+#include <linux/platform_data/ntc_thermistor.h>
#include <linux/power/max17042_battery.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/fixed.h>
@@ -1006,6 +1007,50 @@ static void __init nuri_ehci_init(void)
s5p_ehci_set_platdata(pdata);
}

+/* NTC Thermistor */
+static struct platform_device nuri_ncp15wb473_thermistor;
+static int read_thermistor_uV(void)
+{
+ static struct s3c_adc_client *adc;
+ int val;
+ s64 converted;
+
+ if (!adc) {
+ adc = s3c_adc_register(&nuri_ncp15wb473_thermistor,
+ NULL, NULL, 0);
+ if (IS_ERR_OR_NULL(adc)) {
+ pr_err("%s: Cannot get adc.\n", __func__);
+ return adc ? PTR_ERR(adc) : -ENODEV;
+ }
+ }
+
+ if (IS_ERR_OR_NULL(adc))
+ return adc ? PTR_ERR(adc) : -ENODEV;
+
+ val = s3c_adc_read(adc, 6);
+
+ converted = 3300000LL * (s64) val;
+ converted >>= 12;
+
+ pr_emerg("%s: %d -> %llduV\n", __func__, val, converted);
+ return converted;
+}
+
+static struct ntc_thermistor_platform_data ncp15wb473_pdata = {
+ .read_uV = read_thermistor_uV,
+ .pullup_uV = 3300000, /* VADC_3.3V_C210 */
+ .pullup_ohm = 100000, /* R613 in SLP 7 0105 */
+ .pulldown_ohm = 100000, /* R615 in SLP 7 0105 */
+ .connect = NTC_CONNECTED_GROUND,
+};
+
+static struct platform_device nuri_ncp15wb473_thermistor = {
+ .name = "ncp15wb473",
+ .dev = {
+ .platform_data = &ncp15wb473_pdata,
+ },
+};
+
static struct platform_device *nuri_devices[] __initdata = {
/* Samsung Platform Devices */
&emmc_fixed_voltage,
@@ -1024,6 +1069,7 @@ static struct platform_device *nuri_devices[] __initdata = {
&nuri_gpio_keys,
&nuri_lcd_device,
&nuri_backlight_device,
+ &nuri_ncp15wb473_thermistor,
};

static void __init nuri_map_io(void)
--
1.7.4.1