summaryrefslogtreecommitdiff
path: root/drivers/hwmon/lm70.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/hwmon/lm70.c')
-rw-r--r--drivers/hwmon/lm70.c42
1 files changed, 18 insertions, 24 deletions
diff --git a/drivers/hwmon/lm70.c b/drivers/hwmon/lm70.c
index 472f79521a96..2d1777a03edb 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 */
@@ -113,20 +124,7 @@ static DEVICE_ATTR(temp1_input, S_IRUGO, lm70_sense_temp, NULL);
static ssize_t lm70_show_name(struct device *dev, struct device_attribute
*devattr, char *buf)
{
- struct lm70 *p_lm70 = dev_get_drvdata(dev);
- int ret;
-
- switch (p_lm70->chip) {
- case LM70_CHIP_LM70:
- ret = sprintf(buf, "lm70\n");
- break;
- case LM70_CHIP_TMP121:
- ret = sprintf(buf, "tmp121\n");
- break;
- default:
- ret = -EINVAL;
- }
- return ret;
+ return sprintf(buf, "%s\n", to_spi_device(dev)->modalias);
}
static DEVICE_ATTR(name, S_IRUGO, lm70_show_name, NULL);
@@ -139,17 +137,13 @@ 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;
- /* 3-wire link (shared SI/SO) for LM70 */
- if (chip == LM70_CHIP_LM70 && !(spi->mode & SPI_3WIRE))
- return -EINVAL;
-
/* NOTE: we assume 8-bit words, and convert to 16 bits manually */
- p_lm70 = kzalloc(sizeof *p_lm70, GFP_KERNEL);
+ p_lm70 = devm_kzalloc(&spi->dev, sizeof(*p_lm70), GFP_KERNEL);
if (!p_lm70)
return -ENOMEM;
@@ -181,7 +175,6 @@ out_dev_create_file_failed:
device_remove_file(&spi->dev, &dev_attr_temp1_input);
out_dev_create_temp_file_failed:
spi_set_drvdata(spi, NULL);
- kfree(p_lm70);
return status;
}
@@ -193,7 +186,6 @@ static int __devexit lm70_remove(struct spi_device *spi)
device_remove_file(&spi->dev, &dev_attr_temp1_input);
device_remove_file(&spi->dev, &dev_attr_name);
spi_set_drvdata(spi, NULL);
- kfree(p_lm70);
return 0;
}
@@ -202,6 +194,8 @@ 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);
@@ -219,5 +213,5 @@ 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");