Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223// SPDX-License-Identifier: GPL-2.0-or-later/* * Texas Instruments TMP103 SMBus temperature sensor driver * Copyright (C) 2014 Heiko Schocher <hs@denx.de> * * Based on: * Texas Instruments TMP102 SMBus temperature sensor driver * * Copyright (C) 2010 Steven King <sfking@fdwdc.com> */
#include <linux/module.h>#include <linux/init.h>#include <linux/slab.h>#include <linux/i2c.h>#include <linux/hwmon.h>#include <linux/err.h>#include <linux/device.h>#include <linux/regmap.h>
#define TMP103_TEMP_REG 0x00#define TMP103_CONF_REG 0x01#define TMP103_TLOW_REG 0x02#define TMP103_THIGH_REG 0x03
#define TMP103_CONF_M0 0x01#define TMP103_CONF_M1 0x02#define TMP103_CONF_LC 0x04#define TMP103_CONF_FL 0x08#define TMP103_CONF_FH 0x10#define TMP103_CONF_CR0 0x20#define TMP103_CONF_CR1 0x40#define TMP103_CONF_ID 0x80#define TMP103_CONF_SD (TMP103_CONF_M1)#define TMP103_CONF_SD_MASK (TMP103_CONF_M0 | TMP103_CONF_M1)
#define TMP103_CONFIG (TMP103_CONF_CR1 | TMP103_CONF_M1)#define TMP103_CONFIG_MASK (TMP103_CONF_CR0 | TMP103_CONF_CR1 | \ TMP103_CONF_M0 | TMP103_CONF_M1)
static inline int tmp103_reg_to_mc(s8 val){ return val * 1000;}
static inline u8 tmp103_mc_to_reg(int val){ return DIV_ROUND_CLOSEST(val, 1000);}
static int tmp103_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *temp){ struct regmap *regmap = dev_get_drvdata(dev); unsigned int regval; int err, reg;
switch (attr) { case hwmon_temp_input: reg = TMP103_TEMP_REG; break; case hwmon_temp_min: reg = TMP103_TLOW_REG; break; case hwmon_temp_max: reg = TMP103_THIGH_REG; break; default: return -EOPNOTSUPP; }
err = regmap_read(regmap, reg, ®val); if (err < 0) return err;
*temp = tmp103_reg_to_mc(regval);
return 0;}
static int tmp103_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long temp){ struct regmap *regmap = dev_get_drvdata(dev); int reg;
switch (attr) { case hwmon_temp_min: reg = TMP103_TLOW_REG; break; case hwmon_temp_max: reg = TMP103_THIGH_REG; break; default: return -EOPNOTSUPP; }
temp = clamp_val(temp, -55000, 127000); return regmap_write(regmap, reg, tmp103_mc_to_reg(temp));}
static umode_t tmp103_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, int channel){ if (type != hwmon_temp) return 0;
switch (attr) { case hwmon_temp_input: return 0444; case hwmon_temp_min: case hwmon_temp_max: return 0644; default: return 0; }}
static const struct hwmon_channel_info * const tmp103_info[] = { HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ), HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MIN), NULL};
static const struct hwmon_ops tmp103_hwmon_ops = { .is_visible = tmp103_is_visible, .read = tmp103_read, .write = tmp103_write,};
static const struct hwmon_chip_info tmp103_chip_info = { .ops = &tmp103_hwmon_ops, .info = tmp103_info,};
static bool tmp103_regmap_is_volatile(struct device *dev, unsigned int reg){ return reg == TMP103_TEMP_REG;}
static const struct regmap_config tmp103_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = TMP103_THIGH_REG, .volatile_reg = tmp103_regmap_is_volatile,};
static int tmp103_probe(struct i2c_client *client){ struct device *dev = &client->dev; struct device *hwmon_dev; struct regmap *regmap; int ret;
regmap = devm_regmap_init_i2c(client, &tmp103_regmap_config); if (IS_ERR(regmap)) { dev_err(dev, "failed to allocate register map\n"); return PTR_ERR(regmap); }
ret = regmap_update_bits(regmap, TMP103_CONF_REG, TMP103_CONFIG_MASK, TMP103_CONFIG); if (ret < 0) { dev_err(&client->dev, "error writing config register\n"); return ret; }
i2c_set_clientdata(client, regmap); hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, regmap, &tmp103_chip_info, NULL); return PTR_ERR_OR_ZERO(hwmon_dev);}
static int tmp103_suspend(struct device *dev){ struct regmap *regmap = dev_get_drvdata(dev);
return regmap_update_bits(regmap, TMP103_CONF_REG, TMP103_CONF_SD_MASK, 0);}
static int tmp103_resume(struct device *dev){ struct regmap *regmap = dev_get_drvdata(dev);
return regmap_update_bits(regmap, TMP103_CONF_REG, TMP103_CONF_SD_MASK, TMP103_CONF_SD);}
static DEFINE_SIMPLE_DEV_PM_OPS(tmp103_dev_pm_ops, tmp103_suspend, tmp103_resume);
static const struct i2c_device_id tmp103_id[] = { { .name = "tmp103" }, { }};MODULE_DEVICE_TABLE(i2c, tmp103_id);
static const struct of_device_id __maybe_unused tmp103_of_match[] = { { .compatible = "ti,tmp103" }, { },};MODULE_DEVICE_TABLE(of, tmp103_of_match);
static struct i2c_driver tmp103_driver = { .driver = { .name = "tmp103", .of_match_table = of_match_ptr(tmp103_of_match), .pm = pm_sleep_ptr(&tmp103_dev_pm_ops), }, .probe = tmp103_probe, .id_table = tmp103_id,};
module_i2c_driver(tmp103_driver);
MODULE_AUTHOR("Heiko Schocher <hs@denx.de>");MODULE_DESCRIPTION("Texas Instruments TMP103 temperature sensor driver");MODULE_LICENSE("GPL");