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authorChristophe Leroy <christophe.leroy@c-s.fr>2012-09-05 11:49:14 +0200
committerGuenter Roeck <linux@roeck-us.net>2012-09-23 21:08:34 -0700
commita86e94dc946d58fb5abb8e250a99720c9bdf8c2d (patch)
tree837c3b262620d130519812e0c62ce88c351bb91d /drivers/hwmon/lm70.c
parent367eb2ee8a6f160c369d9afa6732237eeb679467 (diff)
downloadlinux-a86e94dc946d58fb5abb8e250a99720c9bdf8c2d.tar.bz2
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/lm70.c')
-rw-r--r--drivers/hwmon/lm70.c25
1 files changed, 22 insertions, 3 deletions
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");