[PATCH 3/3] hwmon: tmp108: Update driver to use hwmon_chip_info.

John Muir
2016-11-27T05:16:40Z

Move the tmp108 driver from hwmon attribute groups to
hwmon_chip_info.

Signed-off-by: John Muir <john@jmuir.com>
---
drivers/hwmon/tmp108.c | 142 +++++++++++++++++++++++++------------------------
1 file changed, 73 insertions(+), 69 deletions(-)

diff --git a/drivers/hwmon/tmp108.c b/drivers/hwmon/tmp108.c
index b13d652..29ddc2e 100644
--- a/drivers/hwmon/tmp108.c
+++ b/drivers/hwmon/tmp108.c
@@ -25,7 +25,6 @@
#include <linux/device.h>
#include <linux/jiffies.h>
#include <linux/regmap.h>
-#include <linux/thermal.h>
#include <linux/of.h>

#define DRIVER_NAME "tmp108"
@@ -87,12 +86,6 @@ struct tmp108 {
unsigned long ready_time;
};

-static const u8 tmp108_temp_reg[TMP108_TEMP_REG_COUNT] = {
- TMP108_REG_TEMP,
- TMP108_REG_TLOW,
- TMP108_REG_THIGH,
-};
-
/* convert 12-bit TMP108 register value to milliCelsius */
static inline int tmp108_temp_reg_to_mC(s16 val)
{
@@ -105,23 +98,28 @@ static inline u16 tmp108_mC_to_temp_reg(int val)
return (val * 256) / 1000;
}

-static int tmp108_read_reg_temp(struct device *dev, int reg, int *temp)
+static int tmp108_read(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long *temp)
{
struct tmp108 *tmp108 = dev_get_drvdata(dev);
unsigned int regval;
- int err;
+ int err, reg;

- switch (reg) {
- case TMP108_REG_TEMP:
+ switch (attr) {
+ case hwmon_temp_input:
/* Is it too early to return a conversion ? */
if (time_before(jiffies, tmp108->ready_time)) {
dev_dbg(dev, "%s: Conversion not ready yet..\n",
__func__);
return -EAGAIN;
}
+ reg = TMP108_REG_TEMP;
+ break;
+ case hwmon_temp_min:
+ reg = TMP108_REG_TLOW;
break;
- case TMP108_REG_TLOW:
- case TMP108_REG_THIGH:
+ case hwmon_temp_max:
+ reg = TMP108_REG_THIGH;
break;
default:
return -EOPNOTSUPP;
@@ -135,68 +133,79 @@ static int tmp108_read_reg_temp(struct device *dev, int reg, int *temp)
return 0;
}

-static ssize_t tmp108_show_temp(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static int tmp108_write(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long temp)
{
- struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
- int temp;
- int err;
-
- if (sda->index >= ARRAY_SIZE(tmp108_temp_reg))
- return -EINVAL;
+ struct tmp108 *tmp108 = dev_get_drvdata(dev);
+ int reg;

- err = tmp108_read_reg_temp(dev, tmp108_temp_reg[sda->index], &temp);
- if (err)
- return err;
+ switch (attr) {
+ case hwmon_temp_min:
+ reg = TMP108_REG_TLOW;
+ break;
+ case hwmon_temp_max:
+ reg = TMP108_REG_THIGH;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }

- return snprintf(buf, PAGE_SIZE, "%d\n", temp);
+ temp = clamp_val(temp, TMP108_TEMP_MIN_MC, TMP108_TEMP_MAX_MC);
+ return regmap_write(tmp108->regmap, reg, tmp108_mC_to_temp_reg(temp));
}

-static ssize_t tmp108_set_temp(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
+static umode_t tmp108_is_visible(const void *data, enum hwmon_sensor_types type,
+ u32 attr, int channel)
{
- struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
- struct tmp108 *tmp108 = dev_get_drvdata(dev);
- long temp;
- int err;
+ if (type != hwmon_temp)
+ return 0;
+
+ switch (attr) {
+ case hwmon_temp_input:
+ return S_IRUGO;
+ case hwmon_temp_min:
+ case hwmon_temp_max:
+ return S_IRUGO | S_IWUSR;
+ default:
+ return 0;
+ }
+}

- if (sda->index >= ARRAY_SIZE(tmp108_temp_reg))
- return -EINVAL;
+static u32 tmp108_chip_config[] = {
+ HWMON_C_REGISTER_TZ,
+ 0
+};

- if (kstrtol(buf, 10, &temp) < 0)
- return -EINVAL;
+static const struct hwmon_channel_info tmp108_chip = {
+ .type = hwmon_chip,
+ .config = tmp108_chip_config,
+};

- temp = clamp_val(temp, TMP108_TEMP_MIN_MC, TMP108_TEMP_MAX_MC);
- err = regmap_write(tmp108->regmap, tmp108_temp_reg[sda->index],
- tmp108_mC_to_temp_reg(temp));
- if (err)
- return err;
- return count;
-}
+static u32 tmp108_temp_config[] = {
+ HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MIN,
+ 0
+};

-static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, tmp108_show_temp, NULL, 0);
-static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, tmp108_show_temp,
- tmp108_set_temp, 1);
-static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, tmp108_show_temp,
- tmp108_set_temp, 2);
+static const struct hwmon_channel_info tmp108_temp = {
+ .type = hwmon_temp,
+ .config = tmp108_temp_config,
+};

-static struct attribute *tmp108_attrs[] = {
- &sensor_dev_attr_temp1_input.dev_attr.attr,
- &sensor_dev_attr_temp1_min.dev_attr.attr,
- &sensor_dev_attr_temp1_max.dev_attr.attr,
+static const struct hwmon_channel_info *tmp108_info[] = {
+ &tmp108_chip,
+ &tmp108_temp,
NULL
};
-ATTRIBUTE_GROUPS(tmp108);

-static int tmp108_get_temp(void *dev, int *temp)
-{
- return tmp108_read_reg_temp(dev, TMP108_REG_TEMP, temp);
-}
+static const struct hwmon_ops tmp108_hwmon_ops = {
+ .is_visible = tmp108_is_visible,
+ .read = tmp108_read,
+ .write = tmp108_write,
+};

-static const struct thermal_zone_of_device_ops tmp108_of_thermal_ops = {
- .get_temp = tmp108_get_temp,
+static const struct hwmon_chip_info tmp108_chip_info = {
+ .ops = &tmp108_hwmon_ops,
+ .info = tmp108_info,
};

static void tmp108_update_ready_time(struct tmp108 *tmp108)
@@ -243,7 +252,6 @@ static int tmp108_probe(struct i2c_client *client,
{
struct device *dev = &client->dev;
struct device *hwmon_dev;
- struct thermal_zone_device *tz;
struct tmp108 *tmp108;
unsigned int regval;
int err;
@@ -352,19 +360,15 @@ static int tmp108_probe(struct i2c_client *client,
if (err)
return err;

- hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
- tmp108,
- tmp108_groups);
+ hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
+ tmp108,
+ &tmp108_chip_info,
+ NULL);
if (IS_ERR(hwmon_dev)) {
dev_dbg(dev, "unable to register hwmon device\n");
return PTR_ERR(hwmon_dev);
}

- tz = devm_thermal_zone_of_sensor_register(hwmon_dev, 0, hwmon_dev,
- &tmp108_of_thermal_ops);
- if (IS_ERR(tz))
- return PTR_ERR(tz);
-
dev_info(dev, "%s, alert: active %s, hyst: %uC, conv: %ucHz\n",
(tmp108->config & TMP108_CONF_TM) != 0 ?
"interrupt" : "comparator",
--
2.8.0.rc3.226.g39d4020