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authorTang Yuantian <yuantian.tang@freescale.com>2013-06-19 14:50:20 +0800
committerGuenter Roeck <linux@roeck-us.net>2013-06-27 10:31:42 -0700
commit31e7ad74f6044ffec112fd4975c07b797589d89c (patch)
tree220cacb4384d156c3fc723ce043974aecc36e442 /drivers/hwmon
parent87438c2c5483a7ab445c14a8855fd309ae79b4e6 (diff)
hwmon: (ina2xx) Add device tree support to pass the shunt resistor
Adding another way that is device tree to pass the shunt resistor value to driver except for platform data. Signed-off-by: Tang Yuantian <Yuantian.Tang@freescale.com> [Guenter Roeck: Added missing of.h include] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/ina2xx.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/hwmon/ina2xx.c b/drivers/hwmon/ina2xx.c
index 4958b2f89dce..d917a2d8c30f 100644
--- a/drivers/hwmon/ina2xx.c
+++ b/drivers/hwmon/ina2xx.c
@@ -34,6 +34,7 @@
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/jiffies.h>
+#include <linux/of.h>
#include <linux/platform_data/ina2xx.h>
@@ -221,6 +222,7 @@ static int ina2xx_probe(struct i2c_client *client,
struct ina2xx_data *data;
struct ina2xx_platform_data *pdata;
int ret;
+ u32 val;
long shunt = 10000; /* default shunt value 10mOhms */
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
@@ -234,6 +236,9 @@ static int ina2xx_probe(struct i2c_client *client,
pdata =
(struct ina2xx_platform_data *)client->dev.platform_data;
shunt = pdata->shunt_uohms;
+ } else if (!of_property_read_u32(client->dev.of_node,
+ "shunt-resistor", &val)) {
+ shunt = val;
}
if (shunt <= 0)