On Wed, Feb 22, 2012 at 11:18:47PM +0100, Nikolaus Schulz wrote:
> The F75387 stores its temperature hysteresis in a different register than
> the other chips supported by that driver.
>
> Signed-off-by: Nikolaus Schulz <mail@xxxxxxxxxxxxxx>
> ---
> drivers/hwmon/f75375s.c | 36 ++++++++++++++++++++++++++++++------
> 1 files changed, 30 insertions(+), 6 deletions(-)
Oh, stupid me. I have to revoke this patch, because it is simply utter
nonsense. Sorry for that.
The F75387 does indeed use register 0x62 to store a temperature
hysteresis delta, but it applies only to the automatic,
temperature-controlled fan control mode.
The high limit hysteresis temperatures, though, are still stored in
registers 0x29 and 0x2B - here the F75387 is no different from the other
chips supported by this driver.
Nikolaus (grabbing a brown paper bag)
> diff --git a/drivers/hwmon/f75375s.c b/drivers/hwmon/f75375s.c
> index 944937c..3b06abf 100644
> --- a/drivers/hwmon/f75375s.c
> +++ b/drivers/hwmon/f75375s.c
> @@ -65,6 +65,7 @@ enum chips { f75373, f75375, f75387 };
> #define F75387_REG_TEMP11_LSB(nr) (0x1a + (nr))
> #define F75375_REG_TEMP_HIGH(nr) (0x28 + (nr) * 2)
> #define F75375_REG_TEMP_HYST(nr) (0x29 + (nr) * 2)
> +#define F75387_REG_TEMP_HYST 0x62
>
> #define F75375_REG_FAN(nr) (0x16 + (nr) * 2)
> #define F75375_REG_FAN_MIN(nr) (0x2C + (nr) * 2)
> @@ -183,23 +184,34 @@ static struct f75375_data *f75375_update_device(struct device *dev)
> struct i2c_client *client = to_i2c_client(dev);
> struct f75375_data *data = i2c_get_clientdata(client);
> int nr;
> + u8 f75387_hyst_reg = 0;
>
> mutex_lock(&data->update_lock);
>
> /* Limit registers cache is refreshed after 60 seconds */
> if (time_after(jiffies, data->last_limits + 60 * HZ)
> || !data->valid) {
> + if (data->kind == f75387)
> + f75387_hyst_reg =
> + f75375_read8(client, F75387_REG_TEMP_HYST);
> for (nr = 0; nr < 2; nr++) {
> data->temp_high[nr] =
> f75375_read8(client, F75375_REG_TEMP_HIGH(nr));
> - data->temp_max_hyst[nr] =
> - f75375_read8(client, F75375_REG_TEMP_HYST(nr));
> data->fan_max[nr] =
> f75375_read16(client, F75375_REG_FAN_FULL(nr));
> data->fan_min[nr] =
> f75375_read16(client, F75375_REG_FAN_MIN(nr));
> data->fan_target[nr] =
> f75375_read16(client, F75375_REG_FAN_EXP(nr));
> + if (data->kind == f75387) {
> + data->temp_max_hyst[nr] =
> + data->temp_high[nr] -
> + (0xf & f75387_hyst_reg);
> + } else {
> + data->temp_max_hyst[nr] =
> + f75375_read8(client,
> + F75375_REG_TEMP_HYST(nr));
> + }
> }
> for (nr = 0; nr < 4; nr++) {
> data->in_max[nr] =
> @@ -599,11 +611,23 @@ static ssize_t set_temp_max_hyst(struct device *dev,
> if (err < 0)
> return err;
>
> - val = SENSORS_LIMIT(TEMP_TO_REG(val), 0, 127);
> + val = TEMP_TO_REG(val);
> mutex_lock(&data->update_lock);
> - data->temp_max_hyst[nr] = val;
> - f75375_write8(client, F75375_REG_TEMP_HYST(nr),
> - data->temp_max_hyst[nr]);
> + if (data->kind == f75387) {
> + u8 regval;
> + val = SENSORS_LIMIT(val,
> + data->temp_high[nr] - 0xf,
> + data->temp_high[nr]);
> + data->temp_max_hyst[nr] = val;
> + regval = f75375_read8(client, F75387_REG_TEMP_HYST);
> + regval &= 0xf0;
> + regval |= data->temp_high[nr] - val;
> + f75375_write8(client, F75387_REG_TEMP_HYST, regval);
> + } else {
> + val = SENSORS_LIMIT(val, 0, 127);
> + data->temp_max_hyst[nr] = val;
> + f75375_write8(client, F75375_REG_TEMP_HYST(nr), val);
> + }
> mutex_unlock(&data->update_lock);
> return count;
> }
> --
> 1.7.9.1
>
>
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