shawn.starr@rogers.com [PATCH] I2C: lm80 driver improvement ChangeSet 1.2095, 2005/03/02 12:10:18-08:00, shawn.starr@rogers.com [PATCH] I2C: lm80 driver improvement Description: Cleanup some cluttered macros, add error checking for fan divisor value set. Signed-off-by: Sytse Wielinga Signed-off-by: Aurelien Jarno Signed-off-by: Shawn Starr Signed-off-by: Greg Kroah-Hartman drivers/i2c/chips/lm80.c | 17 ++++++++++++----- 1 files changed, 12 insertions(+), 5 deletions(-) diff -Nru a/drivers/i2c/chips/lm80.c b/drivers/i2c/chips/lm80.c --- a/drivers/i2c/chips/lm80.c 2005-03-04 12:25:03 -08:00 +++ b/drivers/i2c/chips/lm80.c 2005-03-04 12:25:03 -08:00 @@ -99,10 +99,7 @@ #define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT((val)<0?\ ((val)-500)/1000:((val)+500)/1000,0,255) -#define ALARMS_FROM_REG(val) (val) - #define DIV_FROM_REG(val) (1 << (val)) -#define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1) /* * Client data (each client gets its own) @@ -263,7 +260,17 @@ DIV_FROM_REG(data->fan_div[nr])); val = simple_strtoul(buf, NULL, 10); - data->fan_div[nr] = DIV_TO_REG(val); + + switch (val) { + case 1: data->fan_div[nr] = 0; break; + case 2: data->fan_div[nr] = 1; break; + case 4: data->fan_div[nr] = 2; break; + case 8: data->fan_div[nr] = 3; break; + default: + dev_err(&client->dev, "fan_div value %ld not " + "supported. Choose one of 1, 2, 4 or 8!\n", val); + return -EINVAL; + } reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1)))) | (data->fan_div[nr] << (2 * (nr + 1))); @@ -321,7 +328,7 @@ static ssize_t show_alarms(struct device *dev, char *buf) { struct lm80_data *data = lm80_update_device(dev); - return sprintf(buf, "%d\n", ALARMS_FROM_REG(data->alarms)); + return sprintf(buf, "%u\n", data->alarms); } static DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min0, set_in_min0);