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![Guenter Roeck](/assets/img/avatar_default.png)
Add support for Texas Instruments TMP464 and TMP468 temperature sensor ICs. TI's TMP464 is an I2C temperature sensor chip. This chip is similar to TI's TMP421 chip, but with 16bit-wide registers (instead of 8bit-wide registers). The chip has one local sensor and four remote sensors. TMP468 is similar to TMP464 but has one local and eight remote sensors. Originally-from: Agathe Porte <agathe.porte@nokia.com> Cc: Agathe Porte <agathe.porte@nokia.com> Cc: Krzysztof Adamski <krzysztof.adamski@nokia.com> Tested-by: Agathe Porte <agathe.porte@nokia.com> Link: https://lore.kernel.org/r/20220222223610.23098-2-linux@roeck-us.net Signed-off-by: Guenter Roeck <linux@roeck-us.net>
712 lines
18 KiB
C
712 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* Driver for the Texas Instruments TMP464 SMBus temperature sensor IC.
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* Supported models: TMP464, TMP468
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* Copyright (C) 2022 Agathe Porte <agathe.porte@nokia.com>
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* Preliminary support by:
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* Lionel Pouliquen <lionel.lp.pouliquen@nokia.com>
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*/
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#include <linux/err.h>
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#include <linux/hwmon.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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/* Addresses to scan */
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static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, I2C_CLIENT_END };
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#define TMP464_NUM_CHANNELS 5 /* chan 0 is internal, 1-4 are remote */
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#define TMP468_NUM_CHANNELS 9 /* chan 0 is internal, 1-8 are remote */
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#define MAX_CHANNELS 9
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#define TMP464_TEMP_REG(channel) (channel)
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#define TMP464_TEMP_OFFSET_REG(channel) (0x40 + ((channel) - 1) * 8)
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#define TMP464_N_FACTOR_REG(channel) (0x41 + ((channel) - 1) * 8)
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static const u8 TMP464_THERM_LIMIT[MAX_CHANNELS] = {
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0x39, 0x42, 0x4A, 0x52, 0x5A, 0x62, 0x6a, 0x72, 0x7a };
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static const u8 TMP464_THERM2_LIMIT[MAX_CHANNELS] = {
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0x3A, 0x43, 0x4B, 0x53, 0x5B, 0x63, 0x6b, 0x73, 0x7b };
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#define TMP464_THERM_STATUS_REG 0x21
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#define TMP464_THERM2_STATUS_REG 0x22
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#define TMP464_REMOTE_OPEN_REG 0x23
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#define TMP464_CONFIG_REG 0x30
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#define TMP464_TEMP_HYST_REG 0x38
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#define TMP464_LOCK_REG 0xc4
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/* Identification */
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#define TMP464_MANUFACTURER_ID_REG 0xFE
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#define TMP464_DEVICE_ID_REG 0xFF
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/* Flags */
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#define TMP464_CONFIG_SHUTDOWN BIT(5)
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#define TMP464_CONFIG_RANGE 0x04
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#define TMP464_CONFIG_REG_REN(x) (BIT(7 + (x)))
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#define TMP464_CONFIG_REG_REN_MASK GENMASK(15, 7)
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#define TMP464_CONFIG_CONVERSION_RATE_B0 2
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#define TMP464_CONFIG_CONVERSION_RATE_B2 4
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#define TMP464_CONFIG_CONVERSION_RATE_MASK GENMASK(TMP464_CONFIG_CONVERSION_RATE_B2, \
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TMP464_CONFIG_CONVERSION_RATE_B0)
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#define TMP464_UNLOCK_VAL 0xeb19
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#define TMP464_LOCK_VAL 0x5ca6
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#define TMP464_LOCKED 0x8000
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/* Manufacturer / Device ID's */
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#define TMP464_MANUFACTURER_ID 0x5449
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#define TMP464_DEVICE_ID 0x1468
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#define TMP468_DEVICE_ID 0x0468
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static const struct i2c_device_id tmp464_id[] = {
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{ "tmp464", TMP464_NUM_CHANNELS },
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{ "tmp468", TMP468_NUM_CHANNELS },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, tmp464_id);
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static const struct of_device_id __maybe_unused tmp464_of_match[] = {
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{
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.compatible = "ti,tmp464",
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.data = (void *)TMP464_NUM_CHANNELS
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},
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{
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.compatible = "ti,tmp468",
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.data = (void *)TMP468_NUM_CHANNELS
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, tmp464_of_match);
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struct tmp464_channel {
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const char *label;
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bool enabled;
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};
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struct tmp464_data {
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struct regmap *regmap;
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struct mutex update_lock;
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int channels;
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s16 config_orig;
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u16 open_reg;
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unsigned long last_updated;
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bool valid;
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int update_interval;
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struct tmp464_channel channel[MAX_CHANNELS];
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};
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static int temp_from_reg(s16 reg)
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{
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return DIV_ROUND_CLOSEST((reg >> 3) * 625, 10);
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}
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static s16 temp_to_limit_reg(long temp)
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{
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return DIV_ROUND_CLOSEST(temp, 500) << 6;
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}
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static s16 temp_to_offset_reg(long temp)
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{
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return DIV_ROUND_CLOSEST(temp * 10, 625) << 3;
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}
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static int tmp464_enable_channels(struct tmp464_data *data)
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{
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struct regmap *regmap = data->regmap;
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u16 enable = 0;
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int i;
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for (i = 0; i < data->channels; i++)
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if (data->channel[i].enabled)
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enable |= TMP464_CONFIG_REG_REN(i);
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return regmap_update_bits(regmap, TMP464_CONFIG_REG, TMP464_CONFIG_REG_REN_MASK, enable);
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}
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static int tmp464_chip_read(struct device *dev, u32 attr, int channel, long *val)
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{
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struct tmp464_data *data = dev_get_drvdata(dev);
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switch (attr) {
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case hwmon_chip_update_interval:
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*val = data->update_interval;
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return 0;
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default:
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return -EOPNOTSUPP;
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}
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}
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static int tmp464_temp_read(struct device *dev, u32 attr, int channel, long *val)
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{
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struct tmp464_data *data = dev_get_drvdata(dev);
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struct regmap *regmap = data->regmap;
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unsigned int regval, regval2;
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int err = 0;
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mutex_lock(&data->update_lock);
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switch (attr) {
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case hwmon_temp_max_alarm:
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err = regmap_read(regmap, TMP464_THERM_STATUS_REG, ®val);
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if (err < 0)
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break;
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*val = !!(regval & BIT(channel + 7));
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break;
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case hwmon_temp_crit_alarm:
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err = regmap_read(regmap, TMP464_THERM2_STATUS_REG, ®val);
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if (err < 0)
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break;
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*val = !!(regval & BIT(channel + 7));
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break;
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case hwmon_temp_fault:
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/*
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* The chip clears TMP464_REMOTE_OPEN_REG after it is read
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* and only updates it after the next measurement cycle is
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* complete. That means we have to cache the value internally
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* for one measurement cycle and report the cached value.
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*/
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if (!data->valid || time_after(jiffies, data->last_updated +
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msecs_to_jiffies(data->update_interval))) {
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err = regmap_read(regmap, TMP464_REMOTE_OPEN_REG, ®val);
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if (err < 0)
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break;
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data->open_reg = regval;
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data->last_updated = jiffies;
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data->valid = true;
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}
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*val = !!(data->open_reg & BIT(channel + 7));
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break;
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case hwmon_temp_max_hyst:
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err = regmap_read(regmap, TMP464_THERM_LIMIT[channel], ®val);
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if (err < 0)
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break;
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err = regmap_read(regmap, TMP464_TEMP_HYST_REG, ®val2);
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if (err < 0)
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break;
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regval -= regval2;
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*val = temp_from_reg(regval);
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break;
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case hwmon_temp_max:
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err = regmap_read(regmap, TMP464_THERM_LIMIT[channel], ®val);
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if (err < 0)
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break;
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*val = temp_from_reg(regval);
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break;
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case hwmon_temp_crit_hyst:
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err = regmap_read(regmap, TMP464_THERM2_LIMIT[channel], ®val);
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if (err < 0)
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break;
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err = regmap_read(regmap, TMP464_TEMP_HYST_REG, ®val2);
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if (err < 0)
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break;
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regval -= regval2;
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*val = temp_from_reg(regval);
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break;
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case hwmon_temp_crit:
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err = regmap_read(regmap, TMP464_THERM2_LIMIT[channel], ®val);
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if (err < 0)
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break;
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*val = temp_from_reg(regval);
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break;
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case hwmon_temp_offset:
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err = regmap_read(regmap, TMP464_TEMP_OFFSET_REG(channel), ®val);
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if (err < 0)
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break;
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*val = temp_from_reg(regval);
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break;
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case hwmon_temp_input:
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if (!data->channel[channel].enabled) {
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err = -ENODATA;
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break;
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}
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err = regmap_read(regmap, TMP464_TEMP_REG(channel), ®val);
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if (err < 0)
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break;
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*val = temp_from_reg(regval);
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break;
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case hwmon_temp_enable:
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*val = data->channel[channel].enabled;
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break;
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default:
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err = -EOPNOTSUPP;
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break;
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}
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mutex_unlock(&data->update_lock);
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return err;
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}
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static int tmp464_read(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, long *val)
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{
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switch (type) {
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case hwmon_chip:
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return tmp464_chip_read(dev, attr, channel, val);
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case hwmon_temp:
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return tmp464_temp_read(dev, attr, channel, val);
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default:
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return -EOPNOTSUPP;
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}
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}
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static int tmp464_read_string(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, const char **str)
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{
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struct tmp464_data *data = dev_get_drvdata(dev);
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*str = data->channel[channel].label;
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return 0;
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}
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static int tmp464_set_convrate(struct tmp464_data *data, long interval)
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{
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int rate;
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/*
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* For valid rates, interval in milli-seconds can be calculated as
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* interval = 125 << (7 - rate);
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* or
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* interval = (1 << (7 - rate)) * 125;
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* The rate is therefore
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* rate = 7 - __fls(interval / 125);
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* and the rounded rate is
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* rate = 7 - __fls(interval * 4 / (125 * 3));
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* Use clamp_val() to avoid overflows, and to ensure valid input
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* for __fls.
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*/
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interval = clamp_val(interval, 125, 16000);
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rate = 7 - __fls(interval * 4 / (125 * 3));
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data->update_interval = 125 << (7 - rate);
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return regmap_update_bits(data->regmap, TMP464_CONFIG_REG,
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TMP464_CONFIG_CONVERSION_RATE_MASK,
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rate << TMP464_CONFIG_CONVERSION_RATE_B0);
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}
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static int tmp464_chip_write(struct tmp464_data *data, u32 attr, int channel, long val)
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{
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switch (attr) {
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case hwmon_chip_update_interval:
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return tmp464_set_convrate(data, val);
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default:
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return -EOPNOTSUPP;
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}
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}
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static int tmp464_temp_write(struct tmp464_data *data, u32 attr, int channel, long val)
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{
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struct regmap *regmap = data->regmap;
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unsigned int regval;
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int err = 0;
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switch (attr) {
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case hwmon_temp_max_hyst:
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err = regmap_read(regmap, TMP464_THERM_LIMIT[0], ®val);
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if (err < 0)
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break;
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val = clamp_val(val, -256000, 256000); /* prevent overflow/underflow */
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val = clamp_val(temp_from_reg(regval) - val, 0, 255000);
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err = regmap_write(regmap, TMP464_TEMP_HYST_REG,
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DIV_ROUND_CLOSEST(val, 1000) << 7);
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break;
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case hwmon_temp_max:
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val = temp_to_limit_reg(clamp_val(val, -255000, 255500));
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err = regmap_write(regmap, TMP464_THERM_LIMIT[channel], val);
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break;
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case hwmon_temp_crit:
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val = temp_to_limit_reg(clamp_val(val, -255000, 255500));
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err = regmap_write(regmap, TMP464_THERM2_LIMIT[channel], val);
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break;
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case hwmon_temp_offset:
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val = temp_to_offset_reg(clamp_val(val, -128000, 127937));
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err = regmap_write(regmap, TMP464_TEMP_OFFSET_REG(channel), val);
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break;
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case hwmon_temp_enable:
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data->channel[channel].enabled = !!val;
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err = tmp464_enable_channels(data);
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break;
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default:
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err = -EOPNOTSUPP;
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break;
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}
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return err;
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}
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static int tmp464_write(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, long val)
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{
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struct tmp464_data *data = dev_get_drvdata(dev);
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int err;
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mutex_lock(&data->update_lock);
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switch (type) {
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case hwmon_chip:
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err = tmp464_chip_write(data, attr, channel, val);
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break;
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case hwmon_temp:
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err = tmp464_temp_write(data, attr, channel, val);
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break;
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default:
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err = -EOPNOTSUPP;
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break;
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}
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mutex_unlock(&data->update_lock);
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return err;
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}
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static umode_t tmp464_is_visible(const void *_data, enum hwmon_sensor_types type,
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u32 attr, int channel)
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{
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const struct tmp464_data *data = _data;
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if (channel >= data->channels)
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return 0;
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if (type == hwmon_chip) {
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if (attr == hwmon_chip_update_interval)
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return 0644;
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return 0;
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}
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switch (attr) {
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case hwmon_temp_input:
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case hwmon_temp_max_alarm:
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case hwmon_temp_crit_alarm:
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case hwmon_temp_crit_hyst:
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return 0444;
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case hwmon_temp_enable:
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case hwmon_temp_max:
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case hwmon_temp_crit:
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return 0644;
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case hwmon_temp_max_hyst:
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if (!channel)
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return 0644;
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return 0444;
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case hwmon_temp_label:
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if (data->channel[channel].label)
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return 0444;
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return 0;
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case hwmon_temp_fault:
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if (channel)
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return 0444;
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return 0;
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case hwmon_temp_offset:
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if (channel)
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return 0644;
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return 0;
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default:
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return 0;
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}
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}
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static void tmp464_restore_lock(void *regmap)
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{
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regmap_write(regmap, TMP464_LOCK_REG, TMP464_LOCK_VAL);
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}
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static void tmp464_restore_config(void *_data)
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{
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struct tmp464_data *data = _data;
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regmap_write(data->regmap, TMP464_CONFIG_REG, data->config_orig);
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}
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static int tmp464_init_client(struct device *dev, struct tmp464_data *data)
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{
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struct regmap *regmap = data->regmap;
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unsigned int regval;
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int err;
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err = regmap_read(regmap, TMP464_LOCK_REG, ®val);
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if (err)
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return err;
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if (regval == TMP464_LOCKED) {
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/* Explicitly unlock chip if it is locked */
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err = regmap_write(regmap, TMP464_LOCK_REG, TMP464_UNLOCK_VAL);
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if (err)
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return err;
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/* and lock it again when unloading the driver */
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err = devm_add_action_or_reset(dev, tmp464_restore_lock, regmap);
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if (err)
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return err;
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}
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err = regmap_read(regmap, TMP464_CONFIG_REG, ®val);
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if (err)
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return err;
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data->config_orig = regval;
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err = devm_add_action_or_reset(dev, tmp464_restore_config, data);
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if (err)
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return err;
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/* Default to 500 ms update interval */
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err = regmap_update_bits(regmap, TMP464_CONFIG_REG,
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TMP464_CONFIG_CONVERSION_RATE_MASK | TMP464_CONFIG_SHUTDOWN,
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BIT(TMP464_CONFIG_CONVERSION_RATE_B0) |
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BIT(TMP464_CONFIG_CONVERSION_RATE_B2));
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if (err)
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return err;
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data->update_interval = 500;
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return tmp464_enable_channels(data);
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}
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static int tmp464_detect(struct i2c_client *client,
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struct i2c_board_info *info)
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{
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struct i2c_adapter *adapter = client->adapter;
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char *name, *chip;
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int reg;
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
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return -ENODEV;
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reg = i2c_smbus_read_word_swapped(client, TMP464_MANUFACTURER_ID_REG);
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if (reg < 0)
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return reg;
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if (reg != TMP464_MANUFACTURER_ID)
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return -ENODEV;
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/* Check for "always return zero" bits */
|
|
reg = i2c_smbus_read_word_swapped(client, TMP464_THERM_STATUS_REG);
|
|
if (reg < 0)
|
|
return reg;
|
|
if (reg & 0x1f)
|
|
return -ENODEV;
|
|
reg = i2c_smbus_read_word_swapped(client, TMP464_THERM2_STATUS_REG);
|
|
if (reg < 0)
|
|
return reg;
|
|
if (reg & 0x1f)
|
|
return -ENODEV;
|
|
|
|
reg = i2c_smbus_read_word_swapped(client, TMP464_DEVICE_ID_REG);
|
|
if (reg < 0)
|
|
return reg;
|
|
switch (reg) {
|
|
case TMP464_DEVICE_ID:
|
|
name = "tmp464";
|
|
chip = "TMP464";
|
|
break;
|
|
case TMP468_DEVICE_ID:
|
|
name = "tmp468";
|
|
chip = "TMP468";
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
}
|
|
|
|
strscpy(info->type, name, I2C_NAME_SIZE);
|
|
dev_info(&adapter->dev, "Detected TI %s chip at 0x%02x\n", chip, client->addr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tmp464_probe_child_from_dt(struct device *dev,
|
|
struct device_node *child,
|
|
struct tmp464_data *data)
|
|
|
|
{
|
|
struct regmap *regmap = data->regmap;
|
|
u32 channel;
|
|
s32 nfactor;
|
|
int err;
|
|
|
|
err = of_property_read_u32(child, "reg", &channel);
|
|
if (err) {
|
|
dev_err(dev, "missing reg property of %pOFn\n", child);
|
|
return err;
|
|
}
|
|
|
|
if (channel >= data->channels) {
|
|
dev_err(dev, "invalid reg %d of %pOFn\n", channel, child);
|
|
return -EINVAL;
|
|
}
|
|
|
|
of_property_read_string(child, "label", &data->channel[channel].label);
|
|
|
|
data->channel[channel].enabled = of_device_is_available(child);
|
|
|
|
err = of_property_read_s32(child, "ti,n-factor", &nfactor);
|
|
if (err && err != -EINVAL)
|
|
return err;
|
|
if (!err) {
|
|
if (channel == 0) {
|
|
dev_err(dev, "n-factor can't be set for internal channel\n");
|
|
return -EINVAL;
|
|
}
|
|
if (nfactor > 127 || nfactor < -128) {
|
|
dev_err(dev, "n-factor for channel %d invalid (%d)\n",
|
|
channel, nfactor);
|
|
return -EINVAL;
|
|
}
|
|
err = regmap_write(regmap, TMP464_N_FACTOR_REG(channel),
|
|
(nfactor << 8) & 0xff00);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tmp464_probe_from_dt(struct device *dev, struct tmp464_data *data)
|
|
{
|
|
const struct device_node *np = dev->of_node;
|
|
struct device_node *child;
|
|
int err;
|
|
|
|
for_each_child_of_node(np, child) {
|
|
if (strcmp(child->name, "channel"))
|
|
continue;
|
|
|
|
err = tmp464_probe_child_from_dt(dev, child, data);
|
|
if (err) {
|
|
of_node_put(child);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct hwmon_ops tmp464_ops = {
|
|
.is_visible = tmp464_is_visible,
|
|
.read = tmp464_read,
|
|
.read_string = tmp464_read_string,
|
|
.write = tmp464_write,
|
|
};
|
|
|
|
static const struct hwmon_channel_info *tmp464_info[] = {
|
|
HWMON_CHANNEL_INFO(chip,
|
|
HWMON_C_UPDATE_INTERVAL),
|
|
HWMON_CHANNEL_INFO(temp,
|
|
HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | HWMON_T_CRIT |
|
|
HWMON_T_CRIT_HYST | HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM |
|
|
HWMON_T_LABEL | HWMON_T_ENABLE,
|
|
HWMON_T_INPUT | HWMON_T_OFFSET | HWMON_T_MAX | HWMON_T_MAX_HYST |
|
|
HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MAX_ALARM |
|
|
HWMON_T_CRIT_ALARM | HWMON_T_FAULT | HWMON_T_LABEL | HWMON_T_ENABLE,
|
|
HWMON_T_INPUT | HWMON_T_OFFSET | HWMON_T_MAX | HWMON_T_MAX_HYST |
|
|
HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MAX_ALARM |
|
|
HWMON_T_CRIT_ALARM | HWMON_T_FAULT | HWMON_T_LABEL | HWMON_T_ENABLE,
|
|
HWMON_T_INPUT | HWMON_T_OFFSET | HWMON_T_MAX | HWMON_T_MAX_HYST |
|
|
HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MAX_ALARM |
|
|
HWMON_T_CRIT_ALARM | HWMON_T_FAULT | HWMON_T_LABEL | HWMON_T_ENABLE,
|
|
HWMON_T_INPUT | HWMON_T_OFFSET | HWMON_T_MAX | HWMON_T_MAX_HYST |
|
|
HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MAX_ALARM |
|
|
HWMON_T_CRIT_ALARM | HWMON_T_FAULT | HWMON_T_LABEL | HWMON_T_ENABLE,
|
|
HWMON_T_INPUT | HWMON_T_OFFSET | HWMON_T_MAX | HWMON_T_MAX_HYST |
|
|
HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MAX_ALARM |
|
|
HWMON_T_CRIT_ALARM | HWMON_T_FAULT | HWMON_T_LABEL | HWMON_T_ENABLE,
|
|
HWMON_T_INPUT | HWMON_T_OFFSET | HWMON_T_MAX | HWMON_T_MAX_HYST |
|
|
HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MAX_ALARM |
|
|
HWMON_T_CRIT_ALARM | HWMON_T_FAULT | HWMON_T_LABEL | HWMON_T_ENABLE,
|
|
HWMON_T_INPUT | HWMON_T_OFFSET | HWMON_T_MAX | HWMON_T_MAX_HYST |
|
|
HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MAX_ALARM |
|
|
HWMON_T_CRIT_ALARM | HWMON_T_FAULT | HWMON_T_LABEL | HWMON_T_ENABLE,
|
|
HWMON_T_INPUT | HWMON_T_OFFSET | HWMON_T_MAX | HWMON_T_MAX_HYST |
|
|
HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MAX_ALARM |
|
|
HWMON_T_CRIT_ALARM | HWMON_T_FAULT | HWMON_T_LABEL | HWMON_T_ENABLE),
|
|
NULL
|
|
};
|
|
|
|
static const struct hwmon_chip_info tmp464_chip_info = {
|
|
.ops = &tmp464_ops,
|
|
.info = tmp464_info,
|
|
};
|
|
|
|
/* regmap */
|
|
|
|
static bool tmp464_is_volatile_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
return (reg < TMP464_TEMP_REG(TMP468_NUM_CHANNELS) ||
|
|
reg == TMP464_THERM_STATUS_REG ||
|
|
reg == TMP464_THERM2_STATUS_REG ||
|
|
reg == TMP464_REMOTE_OPEN_REG);
|
|
}
|
|
|
|
static const struct regmap_config tmp464_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 16,
|
|
.max_register = TMP464_DEVICE_ID_REG,
|
|
.volatile_reg = tmp464_is_volatile_reg,
|
|
.val_format_endian = REGMAP_ENDIAN_BIG,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
.use_single_read = true,
|
|
.use_single_write = true,
|
|
};
|
|
|
|
static int tmp464_probe(struct i2c_client *client)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct device *hwmon_dev;
|
|
struct tmp464_data *data;
|
|
int i, err;
|
|
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
|
|
dev_err(&client->dev, "i2c functionality check failed\n");
|
|
return -ENODEV;
|
|
}
|
|
data = devm_kzalloc(dev, sizeof(struct tmp464_data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&data->update_lock);
|
|
|
|
if (dev->of_node)
|
|
data->channels = (int)(unsigned long)of_device_get_match_data(&client->dev);
|
|
else
|
|
data->channels = i2c_match_id(tmp464_id, client)->driver_data;
|
|
|
|
data->regmap = devm_regmap_init_i2c(client, &tmp464_regmap_config);
|
|
if (IS_ERR(data->regmap))
|
|
return PTR_ERR(data->regmap);
|
|
|
|
for (i = 0; i < data->channels; i++)
|
|
data->channel[i].enabled = true;
|
|
|
|
err = tmp464_init_client(dev, data);
|
|
if (err)
|
|
return err;
|
|
|
|
if (dev->of_node) {
|
|
err = tmp464_probe_from_dt(dev, data);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
|
|
data, &tmp464_chip_info, NULL);
|
|
return PTR_ERR_OR_ZERO(hwmon_dev);
|
|
}
|
|
|
|
static struct i2c_driver tmp464_driver = {
|
|
.class = I2C_CLASS_HWMON,
|
|
.driver = {
|
|
.name = "tmp464",
|
|
.of_match_table = of_match_ptr(tmp464_of_match),
|
|
},
|
|
.probe_new = tmp464_probe,
|
|
.id_table = tmp464_id,
|
|
.detect = tmp464_detect,
|
|
.address_list = normal_i2c,
|
|
};
|
|
|
|
module_i2c_driver(tmp464_driver);
|
|
|
|
MODULE_AUTHOR("Agathe Porte <agathe.porte@nokia.com>");
|
|
MODULE_DESCRIPTION("Texas Instruments TMP464 temperature sensor driver");
|
|
MODULE_LICENSE("GPL");
|