hwmon: (tmp401) Simplification and cleanup
Use two-dimensional array pointing to registers Merge temperature and limit access functions into a single function Return error codes from I2C reads Use DIV_ROUND_CLOSEST for rounding operations and improve rounding Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Родитель
b4e665c780
Коммит
14f2a6654d
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@ -58,21 +58,32 @@ enum chips { tmp401, tmp411, tmp431 };
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#define TMP401_MANUFACTURER_ID_REG 0xFE
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#define TMP401_DEVICE_ID_REG 0xFF
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static const u8 TMP401_TEMP_MSB[2] = { 0x00, 0x01 };
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static const u8 TMP401_TEMP_LSB[2] = { 0x15, 0x10 };
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static const u8 TMP401_TEMP_LOW_LIMIT_MSB_READ[2] = { 0x06, 0x08 };
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static const u8 TMP401_TEMP_LOW_LIMIT_MSB_WRITE[2] = { 0x0C, 0x0E };
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static const u8 TMP401_TEMP_LOW_LIMIT_LSB[2] = { 0x17, 0x14 };
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static const u8 TMP401_TEMP_HIGH_LIMIT_MSB_READ[2] = { 0x05, 0x07 };
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static const u8 TMP401_TEMP_HIGH_LIMIT_MSB_WRITE[2] = { 0x0B, 0x0D };
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static const u8 TMP401_TEMP_HIGH_LIMIT_LSB[2] = { 0x16, 0x13 };
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/* These are called the THERM limit / hysteresis / mask in the datasheet */
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static const u8 TMP401_TEMP_CRIT_LIMIT[2] = { 0x20, 0x19 };
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static const u8 TMP401_TEMP_MSB_READ[6][2] = {
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{ 0x00, 0x01 }, /* temp */
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{ 0x06, 0x08 }, /* low limit */
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{ 0x05, 0x07 }, /* high limit */
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{ 0x20, 0x19 }, /* therm (crit) limit */
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{ 0x30, 0x34 }, /* lowest */
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{ 0x32, 0x36 }, /* highest */
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};
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static const u8 TMP411_TEMP_LOWEST_MSB[2] = { 0x30, 0x34 };
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static const u8 TMP411_TEMP_LOWEST_LSB[2] = { 0x31, 0x35 };
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static const u8 TMP411_TEMP_HIGHEST_MSB[2] = { 0x32, 0x36 };
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static const u8 TMP411_TEMP_HIGHEST_LSB[2] = { 0x33, 0x37 };
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static const u8 TMP401_TEMP_MSB_WRITE[6][2] = {
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{ 0, 0 }, /* temp (unused) */
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{ 0x0C, 0x0E }, /* low limit */
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{ 0x0B, 0x0D }, /* high limit */
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{ 0x20, 0x19 }, /* therm (crit) limit */
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{ 0x30, 0x34 }, /* lowest */
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{ 0x32, 0x36 }, /* highest */
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};
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static const u8 TMP401_TEMP_LSB[6][2] = {
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{ 0x15, 0x10 }, /* temp */
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{ 0x17, 0x14 }, /* low limit */
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{ 0x16, 0x13 }, /* high limit */
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{ 0, 0 }, /* therm (crit) limit (unused) */
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{ 0x31, 0x35 }, /* lowest */
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{ 0x33, 0x37 }, /* highest */
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};
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/* Flags */
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#define TMP401_CONFIG_RANGE BIT(2)
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@ -119,13 +130,8 @@ struct tmp401_data {
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/* register values */
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u8 status;
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u8 config;
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u16 temp[2];
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u16 temp_low[2];
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u16 temp_high[2];
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u8 temp_crit[2];
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u16 temp[6][2];
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u8 temp_crit_hyst;
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u16 temp_lowest[2];
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u16 temp_highest[2];
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};
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/*
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@ -139,10 +145,10 @@ static int tmp401_register_to_temp(u16 reg, u8 config)
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if (config & TMP401_CONFIG_RANGE)
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temp -= 64 * 256;
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return (temp * 625 + 80) / 160;
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return DIV_ROUND_CLOSEST(temp * 125, 32);
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}
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static u16 tmp401_temp_to_register(long temp, u8 config)
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static u16 tmp401_temp_to_register(long temp, u8 config, int zbits)
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{
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if (config & TMP401_CONFIG_RANGE) {
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temp = clamp_val(temp, -64000, 191000);
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@ -150,134 +156,93 @@ static u16 tmp401_temp_to_register(long temp, u8 config)
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} else
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temp = clamp_val(temp, 0, 127000);
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return (temp * 160 + 312) / 625;
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return DIV_ROUND_CLOSEST(temp * (1 << (8 - zbits)), 1000) << zbits;
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}
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static int tmp401_crit_register_to_temp(u8 reg, u8 config)
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static int tmp401_update_device_reg16(struct i2c_client *client,
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struct tmp401_data *data)
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{
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int temp = reg;
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int i, j, val;
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int num_regs = data->kind == tmp411 ? 6 : 4;
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if (config & TMP401_CONFIG_RANGE)
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temp -= 64;
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return temp * 1000;
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}
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static u8 tmp401_crit_temp_to_register(long temp, u8 config)
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{
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if (config & TMP401_CONFIG_RANGE) {
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temp = clamp_val(temp, -64000, 191000);
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temp += 64000;
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} else
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temp = clamp_val(temp, 0, 127000);
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return (temp + 500) / 1000;
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}
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static struct tmp401_data *tmp401_update_device_reg16(
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struct i2c_client *client, struct tmp401_data *data)
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{
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int i;
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for (i = 0; i < 2; i++) {
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for (i = 0; i < 2; i++) { /* local / rem1 */
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for (j = 0; j < num_regs; j++) { /* temp / low / ... */
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/*
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* High byte must be read first immediately followed
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* by the low byte
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*/
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data->temp[i] = i2c_smbus_read_byte_data(client,
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TMP401_TEMP_MSB[i]) << 8;
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data->temp[i] |= i2c_smbus_read_byte_data(client,
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TMP401_TEMP_LSB[i]);
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data->temp_low[i] = i2c_smbus_read_byte_data(client,
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TMP401_TEMP_LOW_LIMIT_MSB_READ[i]) << 8;
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data->temp_low[i] |= i2c_smbus_read_byte_data(client,
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TMP401_TEMP_LOW_LIMIT_LSB[i]);
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data->temp_high[i] = i2c_smbus_read_byte_data(client,
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TMP401_TEMP_HIGH_LIMIT_MSB_READ[i]) << 8;
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data->temp_high[i] |= i2c_smbus_read_byte_data(client,
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TMP401_TEMP_HIGH_LIMIT_LSB[i]);
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data->temp_crit[i] = i2c_smbus_read_byte_data(client,
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TMP401_TEMP_CRIT_LIMIT[i]);
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if (data->kind == tmp411) {
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data->temp_lowest[i] = i2c_smbus_read_byte_data(client,
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TMP411_TEMP_LOWEST_MSB[i]) << 8;
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data->temp_lowest[i] |= i2c_smbus_read_byte_data(
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client, TMP411_TEMP_LOWEST_LSB[i]);
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data->temp_highest[i] = i2c_smbus_read_byte_data(
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client, TMP411_TEMP_HIGHEST_MSB[i]) << 8;
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data->temp_highest[i] |= i2c_smbus_read_byte_data(
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client, TMP411_TEMP_HIGHEST_LSB[i]);
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val = i2c_smbus_read_byte_data(client,
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TMP401_TEMP_MSB_READ[j][i]);
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if (val < 0)
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return val;
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data->temp[j][i] = val << 8;
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if (j == 3) /* crit is msb only */
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continue;
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val = i2c_smbus_read_byte_data(client,
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TMP401_TEMP_LSB[j][i]);
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if (val < 0)
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return val;
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data->temp[j][i] |= val;
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}
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}
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return data;
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return 0;
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}
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static struct tmp401_data *tmp401_update_device(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct tmp401_data *data = i2c_get_clientdata(client);
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struct tmp401_data *ret = data;
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int val;
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mutex_lock(&data->update_lock);
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if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
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data->status = i2c_smbus_read_byte_data(client, TMP401_STATUS);
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data->config = i2c_smbus_read_byte_data(client,
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TMP401_CONFIG_READ);
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tmp401_update_device_reg16(client, data);
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data->temp_crit_hyst = i2c_smbus_read_byte_data(client,
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TMP401_TEMP_CRIT_HYST);
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val = i2c_smbus_read_byte_data(client, TMP401_STATUS);
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if (val < 0) {
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ret = ERR_PTR(val);
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goto abort;
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}
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data->status = val;
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val = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
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if (val < 0) {
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ret = ERR_PTR(val);
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goto abort;
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}
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data->config = val;
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val = tmp401_update_device_reg16(client, data);
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if (val < 0) {
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ret = ERR_PTR(val);
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goto abort;
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}
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val = i2c_smbus_read_byte_data(client, TMP401_TEMP_CRIT_HYST);
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if (val < 0) {
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ret = ERR_PTR(val);
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goto abort;
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}
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data->temp_crit_hyst = val;
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data->last_updated = jiffies;
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data->valid = 1;
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}
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abort:
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mutex_unlock(&data->update_lock);
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return data;
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return ret;
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}
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static ssize_t show_temp_value(struct device *dev,
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static ssize_t show_temp(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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int nr = to_sensor_dev_attr_2(devattr)->nr;
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int index = to_sensor_dev_attr_2(devattr)->index;
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struct tmp401_data *data = tmp401_update_device(dev);
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return sprintf(buf, "%d\n",
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tmp401_register_to_temp(data->temp[index], data->config));
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}
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static ssize_t show_temp_min(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct tmp401_data *data = tmp401_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n",
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tmp401_register_to_temp(data->temp_low[index], data->config));
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}
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static ssize_t show_temp_max(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct tmp401_data *data = tmp401_update_device(dev);
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return sprintf(buf, "%d\n",
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tmp401_register_to_temp(data->temp_high[index], data->config));
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}
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static ssize_t show_temp_crit(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct tmp401_data *data = tmp401_update_device(dev);
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return sprintf(buf, "%d\n",
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tmp401_crit_register_to_temp(data->temp_crit[index],
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data->config));
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tmp401_register_to_temp(data->temp[nr][index], data->config));
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}
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static ssize_t show_temp_crit_hyst(struct device *dev,
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@ -286,122 +251,58 @@ static ssize_t show_temp_crit_hyst(struct device *dev,
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int temp, index = to_sensor_dev_attr(devattr)->index;
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struct tmp401_data *data = tmp401_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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mutex_lock(&data->update_lock);
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temp = tmp401_crit_register_to_temp(data->temp_crit[index],
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data->config);
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temp = tmp401_register_to_temp(data->temp[3][index], data->config);
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temp -= data->temp_crit_hyst * 1000;
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mutex_unlock(&data->update_lock);
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return sprintf(buf, "%d\n", temp);
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}
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static ssize_t show_temp_lowest(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct tmp401_data *data = tmp401_update_device(dev);
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return sprintf(buf, "%d\n",
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tmp401_register_to_temp(data->temp_lowest[index],
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data->config));
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}
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static ssize_t show_temp_highest(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct tmp401_data *data = tmp401_update_device(dev);
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return sprintf(buf, "%d\n",
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tmp401_register_to_temp(data->temp_highest[index],
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data->config));
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}
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static ssize_t show_status(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int mask = to_sensor_dev_attr(devattr)->index;
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struct tmp401_data *data = tmp401_update_device(dev);
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if (data->status & mask)
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return sprintf(buf, "1\n");
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else
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return sprintf(buf, "0\n");
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", !!(data->status & mask));
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}
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static ssize_t store_temp_min(struct device *dev, struct device_attribute
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*devattr, const char *buf, size_t count)
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static ssize_t store_temp(struct device *dev, struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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int nr = to_sensor_dev_attr_2(devattr)->nr;
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int index = to_sensor_dev_attr_2(devattr)->index;
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struct i2c_client *client = to_i2c_client(dev);
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struct tmp401_data *data = tmp401_update_device(dev);
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long val;
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u16 reg;
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if (kstrtol(buf, 10, &val))
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return -EINVAL;
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reg = tmp401_temp_to_register(val, data->config);
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mutex_lock(&data->update_lock);
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i2c_smbus_write_byte_data(to_i2c_client(dev),
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TMP401_TEMP_LOW_LIMIT_MSB_WRITE[index], reg >> 8);
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i2c_smbus_write_byte_data(to_i2c_client(dev),
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TMP401_TEMP_LOW_LIMIT_LSB[index], reg & 0xFF);
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data->temp_low[index] = reg;
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t store_temp_max(struct device *dev, struct device_attribute
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*devattr, const char *buf, size_t count)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct tmp401_data *data = tmp401_update_device(dev);
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long val;
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u16 reg;
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if (IS_ERR(data))
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return PTR_ERR(data);
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if (kstrtol(buf, 10, &val))
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return -EINVAL;
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reg = tmp401_temp_to_register(val, data->config);
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reg = tmp401_temp_to_register(val, data->config, nr == 3 ? 8 : 4);
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mutex_lock(&data->update_lock);
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i2c_smbus_write_byte_data(to_i2c_client(dev),
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TMP401_TEMP_HIGH_LIMIT_MSB_WRITE[index], reg >> 8);
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i2c_smbus_write_byte_data(to_i2c_client(dev),
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TMP401_TEMP_HIGH_LIMIT_LSB[index], reg & 0xFF);
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data->temp_high[index] = reg;
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t store_temp_crit(struct device *dev, struct device_attribute
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*devattr, const char *buf, size_t count)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct tmp401_data *data = tmp401_update_device(dev);
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long val;
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u8 reg;
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if (kstrtol(buf, 10, &val))
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return -EINVAL;
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reg = tmp401_crit_temp_to_register(val, data->config);
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mutex_lock(&data->update_lock);
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i2c_smbus_write_byte_data(to_i2c_client(dev),
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TMP401_TEMP_CRIT_LIMIT[index], reg);
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data->temp_crit[index] = reg;
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i2c_smbus_write_byte_data(client,
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TMP401_TEMP_MSB_WRITE[nr][index],
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reg >> 8);
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if (nr != 3) {
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i2c_smbus_write_byte_data(client,
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TMP401_TEMP_LSB[nr][index],
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reg & 0xFF);
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}
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data->temp[nr][index] = reg;
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mutex_unlock(&data->update_lock);
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@ -416,6 +317,9 @@ static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute
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long val;
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u8 reg;
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if (IS_ERR(data))
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return PTR_ERR(data);
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if (kstrtol(buf, 10, &val))
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return -EINVAL;
|
||||
|
||||
|
@ -425,13 +329,12 @@ static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute
|
|||
val = clamp_val(val, 0, 127000);
|
||||
|
||||
mutex_lock(&data->update_lock);
|
||||
temp = tmp401_crit_register_to_temp(data->temp_crit[index],
|
||||
data->config);
|
||||
temp = tmp401_register_to_temp(data->temp[3][index], data->config);
|
||||
val = clamp_val(val, temp - 255000, temp);
|
||||
reg = ((temp - val) + 500) / 1000;
|
||||
|
||||
i2c_smbus_write_byte_data(to_i2c_client(dev),
|
||||
TMP401_TEMP_CRIT_HYST, reg);
|
||||
i2c_smbus_write_byte_data(to_i2c_client(dev), TMP401_TEMP_CRIT_HYST,
|
||||
reg);
|
||||
|
||||
data->temp_crit_hyst = reg;
|
||||
|
||||
|
@ -460,18 +363,18 @@ static ssize_t reset_temp_history(struct device *dev,
|
|||
return -EINVAL;
|
||||
}
|
||||
i2c_smbus_write_byte_data(to_i2c_client(dev),
|
||||
TMP411_TEMP_LOWEST_MSB[0], val);
|
||||
TMP401_TEMP_MSB_WRITE[5][0], val);
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_value, NULL, 0);
|
||||
static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
|
||||
store_temp_min, 0);
|
||||
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
|
||||
store_temp_max, 0);
|
||||
static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_crit,
|
||||
store_temp_crit, 0);
|
||||
static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
|
||||
static SENSOR_DEVICE_ATTR_2(temp1_min, S_IWUSR | S_IRUGO, show_temp,
|
||||
store_temp, 1, 0);
|
||||
static SENSOR_DEVICE_ATTR_2(temp1_max, S_IWUSR | S_IRUGO, show_temp,
|
||||
store_temp, 2, 0);
|
||||
static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IWUSR | S_IRUGO, show_temp,
|
||||
store_temp, 3, 0);
|
||||
static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO,
|
||||
show_temp_crit_hyst, store_temp_crit_hyst, 0);
|
||||
static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_status, NULL,
|
||||
|
@ -480,13 +383,13 @@ static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_status, NULL,
|
|||
TMP401_STATUS_LOCAL_HIGH);
|
||||
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_status, NULL,
|
||||
TMP401_STATUS_LOCAL_CRIT);
|
||||
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_value, NULL, 1);
|
||||
static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
|
||||
store_temp_min, 1);
|
||||
static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
|
||||
store_temp_max, 1);
|
||||
static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp_crit,
|
||||
store_temp_crit, 1);
|
||||
static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0, 1);
|
||||
static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp,
|
||||
store_temp, 1, 1);
|
||||
static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp,
|
||||
store_temp, 2, 1);
|
||||
static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IWUSR | S_IRUGO, show_temp,
|
||||
store_temp, 3, 1);
|
||||
static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temp_crit_hyst,
|
||||
NULL, 1);
|
||||
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_status, NULL,
|
||||
|
@ -532,10 +435,10 @@ static const struct attribute_group tmp401_group = {
|
|||
* minimum and maximum register reset for both the local
|
||||
* and remote channels.
|
||||
*/
|
||||
static SENSOR_DEVICE_ATTR(temp1_highest, S_IRUGO, show_temp_highest, NULL, 0);
|
||||
static SENSOR_DEVICE_ATTR(temp1_lowest, S_IRUGO, show_temp_lowest, NULL, 0);
|
||||
static SENSOR_DEVICE_ATTR(temp2_highest, S_IRUGO, show_temp_highest, NULL, 1);
|
||||
static SENSOR_DEVICE_ATTR(temp2_lowest, S_IRUGO, show_temp_lowest, NULL, 1);
|
||||
static SENSOR_DEVICE_ATTR_2(temp1_lowest, S_IRUGO, show_temp, NULL, 4, 0);
|
||||
static SENSOR_DEVICE_ATTR_2(temp1_highest, S_IRUGO, show_temp, NULL, 5, 0);
|
||||
static SENSOR_DEVICE_ATTR_2(temp2_lowest, S_IRUGO, show_temp, NULL, 4, 1);
|
||||
static SENSOR_DEVICE_ATTR_2(temp2_highest, S_IRUGO, show_temp, NULL, 5, 1);
|
||||
static SENSOR_DEVICE_ATTR(temp_reset_history, S_IWUSR, NULL, reset_temp_history,
|
||||
0);
|
||||
|
||||
|
|
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Ссылка в новой задаче