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hwmon: (adm1275) Introduce configuration data structure for coeffcients

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Each new chip supported by the driver has a new set of coefficients,
making hard-coding coefficients more and more cumbersome. Introduce
a datastructure and table to simplify configuration.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2015-07-04 08:39:18 -07:00
parent 99b416085c
commit 904b296f30
1 changed files with 68 additions and 45 deletions
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113
drivers/hwmon/pmbus/adm1275.c
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@ -62,6 +62,34 @@ struct adm1275_data {
#define to_adm1275_data(x) container_of(x, struct adm1275_data, info)
struct coefficients {
s16 m;
s16 b;
s16 R;
};
static const struct coefficients adm1075_coefficients[] = {
[0] = { 27169, 0, -1 }, /* voltage */
[1] = { 806, 20475, -1 }, /* current, irange25 */
[2] = { 404, 20475, -1 }, /* current, irange50 */
[3] = { 0, -1, 8549 }, /* power, irange25 */
[4] = { 0, -1, 4279 }, /* power, irange50 */
};
static const struct coefficients adm1275_coefficients[] = {
[0] = { 19199, 0, -2 }, /* voltage, vrange set */
[1] = { 6720, 0, -1 }, /* voltage, vrange not set */
[2] = { 807, 20475, -1 }, /* current */
};
static const struct coefficients adm1276_coefficients[] = {
[0] = { 19199, 0, -2 }, /* voltage, vrange set */
[1] = { 6720, 0, -1 }, /* voltage, vrange not set */
[2] = { 807, 20475, -1 }, /* current */
[3] = { 6043, 0, -2 }, /* power, vrange set */
[4] = { 2115, 0, -1 }, /* power, vrange not set */
};
static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
{
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
@ -235,6 +263,8 @@ static int adm1275_probe(struct i2c_client *client,
struct pmbus_driver_info *info;
struct adm1275_data *data;
const struct i2c_device_id *mid;
const struct coefficients *coefficients;
int vindex = -1, cindex = -1, pindex = -1;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_READ_BYTE_DATA
@ -291,61 +321,34 @@ static int adm1275_probe(struct i2c_client *client,
info->format[PSC_VOLTAGE_IN] = direct;
info->format[PSC_VOLTAGE_OUT] = direct;
info->format[PSC_CURRENT_OUT] = direct;
info->m[PSC_CURRENT_OUT] = 807;
info->b[PSC_CURRENT_OUT] = 20475;
info->R[PSC_CURRENT_OUT] = -1;
info->format[PSC_POWER] = direct;
info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;
info->read_word_data = adm1275_read_word_data;
info->read_byte_data = adm1275_read_byte_data;
info->write_word_data = adm1275_write_word_data;
if (data->id == adm1075) {
info->m[PSC_VOLTAGE_IN] = 27169;
info->b[PSC_VOLTAGE_IN] = 0;
info->R[PSC_VOLTAGE_IN] = -1;
info->m[PSC_VOLTAGE_OUT] = 27169;
info->b[PSC_VOLTAGE_OUT] = 0;
info->R[PSC_VOLTAGE_OUT] = -1;
} else if (config & ADM1275_VRANGE) {
info->m[PSC_VOLTAGE_IN] = 19199;
info->b[PSC_VOLTAGE_IN] = 0;
info->R[PSC_VOLTAGE_IN] = -2;
info->m[PSC_VOLTAGE_OUT] = 19199;
info->b[PSC_VOLTAGE_OUT] = 0;
info->R[PSC_VOLTAGE_OUT] = -2;
} else {
info->m[PSC_VOLTAGE_IN] = 6720;
info->b[PSC_VOLTAGE_IN] = 0;
info->R[PSC_VOLTAGE_IN] = -1;
info->m[PSC_VOLTAGE_OUT] = 6720;
info->b[PSC_VOLTAGE_OUT] = 0;
info->R[PSC_VOLTAGE_OUT] = -1;
}
if (device_config & ADM1275_IOUT_WARN2_SELECT)
data->have_oc_fault = true;
switch (data->id) {
case adm1075:
info->format[PSC_POWER] = direct;
info->b[PSC_POWER] = 0;
info->R[PSC_POWER] = -1;
coefficients = adm1075_coefficients;
vindex = 0;
switch (config & ADM1075_IRANGE_MASK) {
case ADM1075_IRANGE_25:
info->m[PSC_POWER] = 8549;
info->m[PSC_CURRENT_OUT] = 806;
cindex = 1;
pindex = 3;
break;
case ADM1075_IRANGE_50:
info->m[PSC_POWER] = 4279;
info->m[PSC_CURRENT_OUT] = 404;
cindex = 2;
pindex = 4;
break;
default:
dev_err(&client->dev, "Invalid input current range");
info->m[PSC_POWER] = 0;
info->m[PSC_CURRENT_OUT] = 0;
break;
}
info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
| PMBUS_HAVE_STATUS_INPUT;
if (config & ADM1275_VIN_VOUT_SELECT)
@ -353,6 +356,10 @@ static int adm1275_probe(struct i2c_client *client,
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
break;
case adm1275:
coefficients = adm1275_coefficients;
vindex = (config & ADM1275_VRANGE) ? 0 : 1;
cindex = 2;
if (config & ADM1275_VIN_VOUT_SELECT)
info->func[0] |=
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
@ -361,22 +368,38 @@ static int adm1275_probe(struct i2c_client *client,
PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
break;
case adm1276:
info->format[PSC_POWER] = direct;
coefficients = adm1276_coefficients;
vindex = (config & ADM1275_VRANGE) ? 0 : 1;
cindex = 2;
pindex = (config & ADM1275_VRANGE) ? 3 : 4;
info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
| PMBUS_HAVE_STATUS_INPUT;
if (config & ADM1275_VIN_VOUT_SELECT)
info->func[0] |=
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
if (config & ADM1275_VRANGE) {
info->m[PSC_POWER] = 6043;
info->b[PSC_POWER] = 0;
info->R[PSC_POWER] = -2;
} else {
info->m[PSC_POWER] = 2115;
info->b[PSC_POWER] = 0;
info->R[PSC_POWER] = -1;
}
break;
default:
dev_err(&client->dev, "Unsupported device\n");
return -ENODEV;
}
if (vindex >= 0) {
info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m;
info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b;
info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R;
info->m[PSC_VOLTAGE_OUT] = coefficients[vindex].m;
info->b[PSC_VOLTAGE_OUT] = coefficients[vindex].b;
info->R[PSC_VOLTAGE_OUT] = coefficients[vindex].R;
}
if (cindex >= 0) {
info->m[PSC_CURRENT_OUT] = coefficients[cindex].m;
info->b[PSC_CURRENT_OUT] = coefficients[cindex].b;
info->R[PSC_CURRENT_OUT] = coefficients[cindex].R;
}
if (pindex >= 0) {
info->m[PSC_POWER] = coefficients[pindex].m;
info->b[PSC_POWER] = coefficients[pindex].b;
info->R[PSC_POWER] = coefficients[pindex].R;
}
return pmbus_do_probe(client, id, info);