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author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-06 19:56:51 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-06 19:56:51 -0700 |
commit | 7aefd944f038c7469571adb37769cb6f3924ecfa (patch) | |
tree | f0a8dc23633b6bbbc4f0bff932f332e847fb6c1b /drivers/hwmon/max6650.c | |
parent | Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip (diff) | |
parent | hwmon: (lm75) Add support for TMP75B (diff) | |
download | linux-dev-7aefd944f038c7469571adb37769cb6f3924ecfa.tar.xz linux-dev-7aefd944f038c7469571adb37769cb6f3924ecfa.zip |
Merge tag 'hwmon-for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon updates from Guenter Roeck:
- Add driver for Intersil ISL68137 PWM Controller
- Add driver for Lochnagar 2
- Add driver for Infineon IR38064 Voltage Regulator
- Add support for TMP75B to lm75 driver
- Convert documentation to ReST format
- Use request_muxed_region for Super-IO accesses in several drivers
- Add 'samples' attribute to ABI, and start using it
- Add support for custom sysfs attributes to pmbus drivers (used in
ISL68137 driver)
- Introduce HWMON_CHANNEL_INFO macro
- Automated changes:
- Use permission specific [SENSOR_][DEVICE_]ATTR variants
- Fix build warnings due to unused of_device_id structures
- Use HWMON_CHANNEL_INFO macro
- Various minor improvements and fixes
* tag 'hwmon-for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (125 commits)
hwmon: (lm75) Add support for TMP75B
dt-bindings: hwmon: Add tmp75b to lm75.txt
hwmon: (s3c) Use dev_get_drvdata()
hwmon: (max6650) Drop call to thermal_cdev_update
docs: hwmon: remove the extension from .rst files
docs: hwmon: convert three docs to ReST format
hwmon: (max6650) add thermal cooling device capability
hwmon: (ina3221) Add voltage conversion time settings
hwmon: (ina3221) Do not read-back to cache reg_config
docs: hwmon: Add an index file and rename docs to *.rst
docs: hwmon: convert remaining files to ReST format
docs: hwmon: misc files: convert to ReST format
docs: hwmon: pmbus files: convert to ReST format
docs: hwmon: k8temp, w83793: convert to ReST format
docs: hwmon: da9052, da9055: convert to ReST format
docs: hwmon: wm831x, wm8350: convert to ReST format
docs: hwmon: dme1737, vt1211: convert to ReST format
docs: hwmon: ads1015: convert to ReST format
docs: hwmon: asc7621: convert to ReST format
docs: hwmon: ibmpowernv: convert to ReST format
...
Diffstat (limited to 'drivers/hwmon/max6650.c')
-rw-r--r-- | drivers/hwmon/max6650.c | 90 |
1 files changed, 88 insertions, 2 deletions
diff --git a/drivers/hwmon/max6650.c b/drivers/hwmon/max6650.c index 61135a2d0cff..939953240827 100644 --- a/drivers/hwmon/max6650.c +++ b/drivers/hwmon/max6650.c @@ -40,6 +40,7 @@ #include <linux/hwmon-sysfs.h> #include <linux/err.h> #include <linux/of_device.h> +#include <linux/thermal.h> /* * Insmod parameters @@ -113,6 +114,7 @@ module_param(clock, int, 0444); struct max6650_data { struct i2c_client *client; const struct attribute_group *groups[3]; + struct thermal_cooling_device *cooling_dev; struct mutex update_lock; int nr_fans; char valid; /* zero until following fields are valid */ @@ -125,6 +127,7 @@ struct max6650_data { u8 count; u8 dac; u8 alarm; + unsigned long cooling_dev_state; }; static const u8 tach_reg[] = { @@ -134,7 +137,7 @@ static const u8 tach_reg[] = { MAX6650_REG_TACH3, }; -static const struct of_device_id max6650_dt_match[] = { +static const struct of_device_id __maybe_unused max6650_dt_match[] = { { .compatible = "maxim,max6650", .data = (void *)1 @@ -694,6 +697,63 @@ static int max6650_init_client(struct max6650_data *data, return 0; } +#if IS_ENABLED(CONFIG_THERMAL) + +static int max6650_get_max_state(struct thermal_cooling_device *cdev, + unsigned long *state) +{ + *state = 255; + + return 0; +} + +static int max6650_get_cur_state(struct thermal_cooling_device *cdev, + unsigned long *state) +{ + struct max6650_data *data = cdev->devdata; + + *state = data->cooling_dev_state; + + return 0; +} + +static int max6650_set_cur_state(struct thermal_cooling_device *cdev, + unsigned long state) +{ + struct max6650_data *data = cdev->devdata; + struct i2c_client *client = data->client; + int err; + + state = clamp_val(state, 0, 255); + + mutex_lock(&data->update_lock); + + if (data->config & MAX6650_CFG_V12) + data->dac = 180 - (180 * state)/255; + else + data->dac = 76 - (76 * state)/255; + + err = i2c_smbus_write_byte_data(client, MAX6650_REG_DAC, data->dac); + + if (!err) { + max6650_set_operating_mode(data, state ? + MAX6650_CFG_MODE_OPEN_LOOP : + MAX6650_CFG_MODE_OFF); + data->cooling_dev_state = state; + } + + mutex_unlock(&data->update_lock); + + return err < 0 ? err : 0; +} + +static const struct thermal_cooling_device_ops max6650_cooling_ops = { + .get_max_state = max6650_get_max_state, + .get_cur_state = max6650_get_cur_state, + .set_cur_state = max6650_set_cur_state, +}; +#endif + static int max6650_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -709,6 +769,7 @@ static int max6650_probe(struct i2c_client *client, return -ENOMEM; data->client = client; + i2c_set_clientdata(client, data); mutex_init(&data->update_lock); data->nr_fans = of_id ? (int)(uintptr_t)of_id->data : id->driver_data; @@ -727,7 +788,31 @@ static int max6650_probe(struct i2c_client *client, hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, data, data->groups); - return PTR_ERR_OR_ZERO(hwmon_dev); + err = PTR_ERR_OR_ZERO(hwmon_dev); + if (err) + return err; + +#if IS_ENABLED(CONFIG_THERMAL) + data->cooling_dev = + thermal_of_cooling_device_register(client->dev.of_node, + client->name, data, + &max6650_cooling_ops); + if (IS_ERR(data->cooling_dev)) + dev_warn(&client->dev, + "thermal cooling device register failed: %ld\n", + PTR_ERR(data->cooling_dev)); +#endif + return 0; +} + +static int max6650_remove(struct i2c_client *client) +{ + struct max6650_data *data = i2c_get_clientdata(client); + + if (!IS_ERR(data->cooling_dev)) + thermal_cooling_device_unregister(data->cooling_dev); + + return 0; } static const struct i2c_device_id max6650_id[] = { @@ -743,6 +828,7 @@ static struct i2c_driver max6650_driver = { .of_match_table = of_match_ptr(max6650_dt_match), }, .probe = max6650_probe, + .remove = max6650_remove, .id_table = max6650_id, }; |