diff options
| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2012-09-05 11:49:14 +0200 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2012-09-23 21:08:34 -0700 |
| commit | a86e94dc946d58fb5abb8e250a99720c9bdf8c2d (patch) | |
| tree | 837c3b262620d130519812e0c62ce88c351bb91d /drivers/hwmon | |
| parent | 367eb2ee8a6f160c369d9afa6732237eeb679467 (diff) | |
hwmon: (lm70) Add support for LM71 and LM74
Add support for LM74 and LM71 to LM70 driver.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/hwmon/lm70.c | 25 |
2 files changed, 25 insertions, 6 deletions
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 6566ed6db3b0..8343cadd6632 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -560,12 +560,12 @@ config SENSORS_LM63 will be called lm63. config SENSORS_LM70 - tristate "National Semiconductor LM70 / Texas Instruments TMP121" + tristate "National Semiconductor LM70 and compatibles" depends on SPI_MASTER help If you say yes here you get support for the National Semiconductor - LM70 and Texas Instruments TMP121/TMP123 digital temperature - sensor chips. + LM70, LM71, LM74 and Texas Instruments TMP121/TMP123 digital tempera- + ture sensor chips. This driver can also be built as a module. If so, the module will be called lm70. diff --git a/drivers/hwmon/lm70.c b/drivers/hwmon/lm70.c index 1da62f616db5..789753d0df79 100644 --- a/drivers/hwmon/lm70.c +++ b/drivers/hwmon/lm70.c @@ -43,6 +43,8 @@ #define LM70_CHIP_LM70 0 /* original NS LM70 */ #define LM70_CHIP_TMP121 1 /* TI TMP121/TMP123 */ +#define LM70_CHIP_LM71 2 /* NS LM71 */ +#define LM70_CHIP_LM74 3 /* NS LM74 */ struct lm70 { struct device *hwmon_dev; @@ -88,9 +90,13 @@ static ssize_t lm70_sense_temp(struct device *dev, * Celsius. * So it's equivalent to multiplying by 0.25 * 1000 = 250. * - * TMP121/TMP123: + * LM74 and TMP121/TMP123: * 13 bits of 2's complement data, discard LSB 3 bits, * resolution 0.0625 degrees celsius. + * + * LM71: + * 14 bits of 2's complement data, discard LSB 2 bits, + * resolution 0.0312 degrees celsius. */ switch (p_lm70->chip) { case LM70_CHIP_LM70: @@ -98,8 +104,13 @@ static ssize_t lm70_sense_temp(struct device *dev, break; case LM70_CHIP_TMP121: + case LM70_CHIP_LM74: val = ((int)raw / 8) * 625 / 10; break; + + case LM70_CHIP_LM71: + val = ((int)raw / 4) * 3125 / 100; + break; } status = sprintf(buf, "%d\n", val); /* millidegrees Celsius */ @@ -123,6 +134,12 @@ static ssize_t lm70_show_name(struct device *dev, struct device_attribute case LM70_CHIP_TMP121: ret = sprintf(buf, "tmp121\n"); break; + case LM70_CHIP_LM71: + ret = sprintf(buf, "lm71\n"); + break; + case LM70_CHIP_LM74: + ret = sprintf(buf, "lm74\n"); + break; default: ret = -EINVAL; } @@ -139,7 +156,7 @@ static int __devinit lm70_probe(struct spi_device *spi) struct lm70 *p_lm70; int status; - /* signaling is SPI_MODE_0 for both LM70 and TMP121 */ + /* signaling is SPI_MODE_0 */ if (spi->mode & (SPI_CPOL | SPI_CPHA)) return -EINVAL; @@ -196,6 +213,8 @@ static int __devexit lm70_remove(struct spi_device *spi) static const struct spi_device_id lm70_ids[] = { { "lm70", LM70_CHIP_LM70 }, { "tmp121", LM70_CHIP_TMP121 }, + { "lm71", LM70_CHIP_LM71 }, + { "lm74", LM70_CHIP_LM74 }, { }, }; MODULE_DEVICE_TABLE(spi, lm70_ids); @@ -213,5 +232,5 @@ static struct spi_driver lm70_driver = { module_spi_driver(lm70_driver); MODULE_AUTHOR("Kaiwan N Billimoria"); -MODULE_DESCRIPTION("NS LM70 / TI TMP121/TMP123 Linux driver"); +MODULE_DESCRIPTION("NS LM70 and compatibles Linux driver"); MODULE_LICENSE("GPL"); |