diff options
| author | Guenter Roeck <linux@roeck-us.net> | 2021-11-19 14:24:18 -0800 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2022-07-13 08:38:18 -0700 |
| commit | c9933a4439b57f404d7809445e6e43c8f1bbf7e4 (patch) | |
| tree | 2ed811b77df957a7027c1a25992349e44af61d71 | |
| parent | 3c1ecccbbc1389773c32fc56910cf23512fccfcd (diff) | |
| download | linux-c9933a4439b57f404d7809445e6e43c8f1bbf7e4.tar.gz | |
hwmon: (lm90) Let lm90_read16() handle 8-bit read operations
Simplify the code a bit by handling single-register read operations in lm90_read16(). All we need to do is to skip the low-byte read operation if the register address is 0. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| -rw-r--r-- | drivers/hwmon/lm90.c | 47 |
1 files changed, 17 insertions, 30 deletions
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c index 181fc1efaa47..4050706a1f32 100644 --- a/drivers/hwmon/lm90.c +++ b/drivers/hwmon/lm90.c @@ -673,6 +673,10 @@ static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, oldh = lm90_read_reg(client, regh); if (oldh < 0) return oldh; + + if (!regl) + return oldh << 8; + l = lm90_read_reg(client, regl); if (l < 0) return l; @@ -804,29 +808,19 @@ static int lm90_update_limits(struct device *dev) data->temp_hyst = val; } - val = lm90_read_reg(client, LM90_REG_REMOTE_LOWH); + val = lm90_read16(client, LM90_REG_REMOTE_LOWH, + (data->flags & LM90_HAVE_REM_LIMIT_EXT) ? LM90_REG_REMOTE_LOWL : 0, + false); if (val < 0) return val; - data->temp[REMOTE_LOW] = val << 8; + data->temp[REMOTE_LOW] = val; - if (data->flags & LM90_HAVE_REM_LIMIT_EXT) { - val = lm90_read_reg(client, LM90_REG_REMOTE_LOWL); - if (val < 0) - return val; - data->temp[REMOTE_LOW] |= val; - } - - val = lm90_read_reg(client, LM90_REG_REMOTE_HIGHH); + val = lm90_read16(client, LM90_REG_REMOTE_HIGHH, + (data->flags & LM90_HAVE_REM_LIMIT_EXT) ? LM90_REG_REMOTE_HIGHL : 0, + false); if (val < 0) return val; - data->temp[REMOTE_HIGH] = val << 8; - - if (data->flags & LM90_HAVE_REM_LIMIT_EXT) { - val = lm90_read_reg(client, LM90_REG_REMOTE_HIGHL); - if (val < 0) - return val; - data->temp[REMOTE_HIGH] |= val; - } + data->temp[REMOTE_HIGH] = val; if (data->flags & LM90_HAVE_OFFSET) { val = lm90_read16(client, LM90_REG_REMOTE_OFFSH, @@ -1063,18 +1057,11 @@ static int lm90_update_device(struct device *dev) return val; data->temp[LOCAL_HIGH] = val << 8; - if (data->reg_local_ext) { - val = lm90_read16(client, LM90_REG_LOCAL_TEMP, - data->reg_local_ext, true); - if (val < 0) - return val; - data->temp[LOCAL_TEMP] = val; - } else { - val = lm90_read_reg(client, LM90_REG_LOCAL_TEMP); - if (val < 0) - return val; - data->temp[LOCAL_TEMP] = val << 8; - } + val = lm90_read16(client, LM90_REG_LOCAL_TEMP, + data->reg_local_ext, true); + if (val < 0) + return val; + data->temp[LOCAL_TEMP] = val; val = lm90_read16(client, LM90_REG_REMOTE_TEMPH, LM90_REG_REMOTE_TEMPL, true); if (val < 0) |