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hwmon: (emc1403) Support 11 bit accuracy

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Various temperature and limit registers support 11 bit accuracy.
Add support for it.

Cc: Lars Petter Mostad <lars.petter.mostad@appear.net>
Tested-by: Lars Petter Mostad <lars.petter.mostad@appear.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck
2024-05-02 21:53:55 -07:00
parent 1094360dc8
commit e77b204ad4
1 changed files with 52 additions and 3 deletions
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55
drivers/hwmon/emc1403.c
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@@ -178,17 +178,52 @@ static u8 emc1403_temp_regs[][4] = {
},
};
static s8 emc1403_temp_regs_low[][4] = {
[0] = {
[temp_min] = -1,
[temp_max] = -1,
[temp_crit] = -1,
[temp_input] = 0x29,
},
[1] = {
[temp_min] = 0x14,
[temp_max] = 0x13,
[temp_crit] = -1,
[temp_input] = 0x10,
},
[2] = {
[temp_min] = 0x18,
[temp_max] = 0x17,
[temp_crit] = -1,
[temp_input] = 0x24,
},
[3] = {
[temp_min] = 0x2f,
[temp_max] = 0x2e,
[temp_crit] = -1,
[temp_input] = 0x2b,
},
};
static int __emc1403_get_temp(struct thermal_data *data, int channel,
enum emc1403_reg_map map, long *val)
{
unsigned int regval;
int ret;
s8 reg;
ret = regmap_read(data->regmap, emc1403_temp_regs[channel][map], &regval);
if (ret < 0)
return ret;
*val = regval * 1000;
reg = emc1403_temp_regs_low[channel][map];
if (reg >= 0) {
ret = regmap_read(data->regmap, reg, &regval);
if (ret < 0)
return ret;
*val += (regval >> 5) * 125;
}
return 0;
}
@@ -336,12 +371,26 @@ static int emc1403_set_temp(struct thermal_data *data, int channel,
{
unsigned int regval;
int ret;
u8 regh;
s8 regl;
val = clamp_val(val, 0, 255000);
regh = emc1403_temp_regs[channel][map];
regl = emc1403_temp_regs_low[channel][map];
mutex_lock(&data->mutex);
regval = DIV_ROUND_CLOSEST(val, 1000);
ret = regmap_write(data->regmap, emc1403_temp_regs[channel][map], regval);
if (regl >= 0) {
val = clamp_val(val, 0, 255875);
regval = DIV_ROUND_CLOSEST(val, 125);
ret = regmap_write(data->regmap, regh, regval >> 3);
if (ret < 0)
goto unlock;
ret = regmap_write(data->regmap, regl, (regval & 0x07) << 5);
} else {
val = clamp_val(val, 0, 255000);
regval = DIV_ROUND_CLOSEST(val, 1000);
ret = regmap_write(data->regmap, regh, regval);
}
unlock:
mutex_unlock(&data->mutex);
return ret;
}