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Message-ID: <1393932664-13319-2-git-send-email-wni@nvidia.com>
Date: Tue, 4 Mar 2014 19:31:02 +0800
From: Wei Ni <wni@...dia.com>
To: <khali@...ux-fr.org>, <linux@...ck-us.net>, <swarren@...dotorg.org>
CC: <linux-kernel@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
<lm-sensors@...sensors.org>, Wei Ni <wni@...dia.com>
Subject: [PATCH v2 1/3] hwmon: (lm90) split set&show temp as common codes
Split set&show temp codes as common functions, so we can use it
directly when implement linux thermal framework.
And handle error return value for the lm90_select_remote_channel
and write_tempx, then set_temp8 and set_temp11 could return it
to user-space.
Change-Id: Id7178f680718fd54b9ba953118d91052b59b692e
Signed-off-by: Wei Ni <wni@...dia.com>
Signed-off-by: Jean Delvare <khali@...ux-fr.org>
---
drivers/hwmon/lm90.c | 164 +++++++++++++++++++++++++++++++++-----------------
1 file changed, 109 insertions(+), 55 deletions(-)
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index c9ff08d..cb33dcf 100644
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -473,20 +473,23 @@ static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, u16 *value)
* various registers have different meanings as a result of selecting a
* non-default remote channel.
*/
-static inline void lm90_select_remote_channel(struct i2c_client *client,
- struct lm90_data *data,
- int channel)
+static inline int lm90_select_remote_channel(struct i2c_client *client,
+ struct lm90_data *data,
+ int channel)
{
u8 config;
+ int err = 0;
if (data->kind == max6696) {
lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
config &= ~0x08;
if (channel)
config |= 0x08;
- i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
- config);
+ err = i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
+ config);
}
+
+ return err;
}
/*
@@ -759,29 +762,34 @@ static u16 temp_to_u16_adt7461(struct lm90_data *data, long val)
* Sysfs stuff
*/
-static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
- char *buf)
+static int read_temp8(struct device *dev, int index)
{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct lm90_data *data = lm90_update_device(dev);
int temp;
if (data->kind == adt7461 || data->kind == tmp451)
- temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
+ temp = temp_from_u8_adt7461(data, data->temp8[index]);
else if (data->kind == max6646)
- temp = temp_from_u8(data->temp8[attr->index]);
+ temp = temp_from_u8(data->temp8[index]);
else
- temp = temp_from_s8(data->temp8[attr->index]);
+ temp = temp_from_s8(data->temp8[index]);
/* +16 degrees offset for temp2 for the LM99 */
- if (data->kind == lm99 && attr->index == 3)
+ if (data->kind == lm99 && index == 3)
temp += 16000;
- return sprintf(buf, "%d\n", temp);
+ return temp;
}
-static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
- const char *buf, size_t count)
+static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+
+ return sprintf(buf, "%d\n", read_temp8(dev, attr->index));
+}
+
+static int write_temp8(struct device *dev, int index, long val)
{
static const u8 reg[TEMP8_REG_NUM] = {
LM90_REG_W_LOCAL_LOW,
@@ -794,60 +802,79 @@ static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
MAX6659_REG_W_REMOTE_EMERG,
};
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct lm90_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
- int nr = attr->index;
- long val;
int err;
- err = kstrtol(buf, 10, &val);
- if (err < 0)
- return err;
-
/* +16 degrees offset for temp2 for the LM99 */
- if (data->kind == lm99 && attr->index == 3)
+ if (data->kind == lm99 && index == 3)
val -= 16000;
mutex_lock(&data->update_lock);
if (data->kind == adt7461 || data->kind == tmp451)
- data->temp8[nr] = temp_to_u8_adt7461(data, val);
+ data->temp8[index] = temp_to_u8_adt7461(data, val);
else if (data->kind == max6646)
- data->temp8[nr] = temp_to_u8(val);
+ data->temp8[index] = temp_to_u8(val);
else
- data->temp8[nr] = temp_to_s8(val);
-
- lm90_select_remote_channel(client, data, nr >= 6);
- i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]);
- lm90_select_remote_channel(client, data, 0);
+ data->temp8[index] = temp_to_s8(val);
+ if ((err = lm90_select_remote_channel(client, data, index >= 6)) ||
+ (err = i2c_smbus_write_byte_data(client, reg[index],
+ data->temp8[index])) ||
+ (err = lm90_select_remote_channel(client, data, 0)))
+ dev_err(dev, "write_temp8 failed, err %d\n", err);
mutex_unlock(&data->update_lock);
+
+ return err;
+}
+
+static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ int index = attr->index;
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err < 0)
+ return err;
+
+ err = write_temp8(dev, index, val);
+ if (err < 0)
+ return err;
+
return count;
}
-static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
- char *buf)
+static int read_temp11(struct device *dev, int index)
{
- struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
struct lm90_data *data = lm90_update_device(dev);
int temp;
if (data->kind == adt7461 || data->kind == tmp451)
- temp = temp_from_u16_adt7461(data, data->temp11[attr->index]);
+ temp = temp_from_u16_adt7461(data, data->temp11[index]);
else if (data->kind == max6646)
- temp = temp_from_u16(data->temp11[attr->index]);
+ temp = temp_from_u16(data->temp11[index]);
else
- temp = temp_from_s16(data->temp11[attr->index]);
+ temp = temp_from_s16(data->temp11[index]);
/* +16 degrees offset for temp2 for the LM99 */
- if (data->kind == lm99 && attr->index <= 2)
+ if (data->kind == lm99 && index <= 2)
temp += 16000;
- return sprintf(buf, "%d\n", temp);
+ return temp;
}
-static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
- const char *buf, size_t count)
+static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
+
+ return sprintf(buf, "%d\n", read_temp11(dev, attr->index));
+}
+
+static int write_temp11(struct device *dev, int nr, int index, long val)
{
struct {
u8 high;
@@ -861,18 +888,10 @@ static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
{ LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 1 }
};
- struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
struct lm90_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
- int nr = attr->nr;
- int index = attr->index;
- long val;
int err;
- err = kstrtol(buf, 10, &val);
- if (err < 0)
- return err;
-
/* +16 degrees offset for temp2 for the LM99 */
if (data->kind == lm99 && index <= 2)
val -= 16000;
@@ -887,15 +906,50 @@ static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
else
data->temp11[index] = temp_to_s8(val) << 8;
- lm90_select_remote_channel(client, data, reg[nr].channel);
- i2c_smbus_write_byte_data(client, reg[nr].high,
- data->temp11[index] >> 8);
- if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
- i2c_smbus_write_byte_data(client, reg[nr].low,
- data->temp11[index] & 0xff);
- lm90_select_remote_channel(client, data, 0);
+ err = lm90_select_remote_channel(client, data, reg[nr].channel);
+ if (err)
+ goto error;
+
+ err = i2c_smbus_write_byte_data(client, reg[nr].high,
+ data->temp11[index] >> 8);
+ if (err)
+ goto error;
+
+ if (data->flags & LM90_HAVE_REM_LIMIT_EXT) {
+ err = i2c_smbus_write_byte_data(client, reg[nr].low,
+ data->temp11[index] & 0xff);
+ if (err)
+ goto error;
+ }
+
+ err = lm90_select_remote_channel(client, data, 0);
+
+error:
+ if (err)
+ dev_err(dev, "write_temp11 failed, err %d\n", err);
mutex_unlock(&data->update_lock);
+
+ return err;
+}
+
+static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
+ int nr = attr->nr;
+ int index = attr->index;
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err < 0)
+ return err;
+
+ err = write_temp11(dev, nr, index, val);
+ if (err < 0)
+ return err;
+
return count;
}
--
1.7.9.5
--
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