forked from Minki/linux
hwmon: (dme1737) fix voltage scaling
This patch fixes a voltage scaling issue for the sch311x device. Signed-Off-By: Juerg Haefliger <juergh at gmail.com> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
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@ -181,6 +181,7 @@ struct dme1737_data {
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int valid; /* !=0 if following fields are valid */
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unsigned long last_update; /* in jiffies */
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unsigned long last_vbat; /* in jiffies */
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enum chips type;
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u8 vid;
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u8 pwm_rr_en;
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@ -215,20 +216,27 @@ struct dme1737_data {
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};
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/* Nominal voltage values */
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static const int IN_NOMINAL[] = {5000, 2250, 3300, 5000, 12000, 3300, 3300};
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static const int IN_NOMINAL_DME1737[] = {5000, 2250, 3300, 5000, 12000, 3300,
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3300};
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static const int IN_NOMINAL_SCH311x[] = {2500, 1500, 3300, 5000, 12000, 3300,
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3300};
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#define IN_NOMINAL(ix, type) (((type) == dme1737) ? \
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IN_NOMINAL_DME1737[(ix)] : \
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IN_NOMINAL_SCH311x[(ix)])
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/* Voltage input
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* Voltage inputs have 16 bits resolution, limit values have 8 bits
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* resolution. */
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static inline int IN_FROM_REG(int reg, int ix, int res)
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static inline int IN_FROM_REG(int reg, int ix, int res, int type)
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{
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return (reg * IN_NOMINAL[ix] + (3 << (res - 3))) / (3 << (res - 2));
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return (reg * IN_NOMINAL(ix, type) + (3 << (res - 3))) /
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(3 << (res - 2));
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}
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static inline int IN_TO_REG(int val, int ix)
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static inline int IN_TO_REG(int val, int ix, int type)
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{
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return SENSORS_LIMIT((val * 192 + IN_NOMINAL[ix] / 2) /
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IN_NOMINAL[ix], 0, 255);
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return SENSORS_LIMIT((val * 192 + IN_NOMINAL(ix, type) / 2) /
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IN_NOMINAL(ix, type), 0, 255);
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}
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/* Temperature input
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@ -727,13 +735,13 @@ static ssize_t show_in(struct device *dev, struct device_attribute *attr,
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switch (fn) {
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case SYS_IN_INPUT:
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res = IN_FROM_REG(data->in[ix], ix, 16);
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res = IN_FROM_REG(data->in[ix], ix, 16, data->type);
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break;
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case SYS_IN_MIN:
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res = IN_FROM_REG(data->in_min[ix], ix, 8);
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res = IN_FROM_REG(data->in_min[ix], ix, 8, data->type);
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break;
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case SYS_IN_MAX:
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res = IN_FROM_REG(data->in_max[ix], ix, 8);
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res = IN_FROM_REG(data->in_max[ix], ix, 8, data->type);
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break;
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case SYS_IN_ALARM:
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res = (data->alarms >> DME1737_BIT_ALARM_IN[ix]) & 0x01;
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@ -760,12 +768,12 @@ static ssize_t set_in(struct device *dev, struct device_attribute *attr,
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mutex_lock(&data->update_lock);
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switch (fn) {
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case SYS_IN_MIN:
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data->in_min[ix] = IN_TO_REG(val, ix);
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data->in_min[ix] = IN_TO_REG(val, ix, data->type);
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dme1737_write(client, DME1737_REG_IN_MIN(ix),
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data->in_min[ix]);
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break;
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case SYS_IN_MAX:
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data->in_max[ix] = IN_TO_REG(val, ix);
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data->in_max[ix] = IN_TO_REG(val, ix, data->type);
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dme1737_write(client, DME1737_REG_IN_MAX(ix),
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data->in_max[ix]);
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break;
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@ -2167,6 +2175,7 @@ static int dme1737_i2c_detect(struct i2c_adapter *adapter, int address,
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kind = dme1737;
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name = "dme1737";
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data->type = kind;
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/* Fill in the remaining client fields and put it into the global
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* list */
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@ -2359,6 +2368,7 @@ static int __devinit dme1737_isa_probe(struct platform_device *pdev)
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err = -ENODEV;
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goto exit_kfree;
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}
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data->type = -1;
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/* Fill in the remaining client fields and initialize the mutex */
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strlcpy(client->name, "sch311x", I2C_NAME_SIZE);
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