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hwmon: (adm1275) Introduce new feature flags

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Introduce have_vout, have_vaux_status, have_pin_max, and have_uc_fault
to simplify adding support for new chips.

Also simplify error returns where appropriate to return immediately
on error.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2015-07-04 10:09:54 -07:00
parent 904b296f30
commit 9048539b7c
1 changed files with 54 additions and 43 deletions
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97
drivers/hwmon/pmbus/adm1275.c
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@ -57,6 +57,10 @@ enum chips { adm1075, adm1275, adm1276 };
struct adm1275_data {
int id;
bool have_oc_fault;
bool have_uc_fault;
bool have_vout;
bool have_vaux_status;
bool have_pin_max;
struct pmbus_driver_info info;
};
@ -101,40 +105,30 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
switch (reg) {
case PMBUS_IOUT_UC_FAULT_LIMIT:
if (data->have_oc_fault) {
ret = -ENXIO;
break;
}
if (!data->have_uc_fault)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
break;
case PMBUS_IOUT_OC_FAULT_LIMIT:
if (!data->have_oc_fault) {
ret = -ENXIO;
break;
}
if (!data->have_oc_fault)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
break;
case PMBUS_VOUT_OV_WARN_LIMIT:
if (data->id != adm1075) {
ret = -ENODATA;
break;
}
if (data->have_vout)
return -ENODATA;
ret = pmbus_read_word_data(client, 0,
ADM1075_VAUX_OV_WARN_LIMIT);
break;
case PMBUS_VOUT_UV_WARN_LIMIT:
if (data->id != adm1075) {
ret = -ENODATA;
break;
}
if (data->have_vout)
return -ENODATA;
ret = pmbus_read_word_data(client, 0,
ADM1075_VAUX_UV_WARN_LIMIT);
break;
case PMBUS_READ_VOUT:
if (data->id != adm1075) {
ret = -ENODATA;
break;
}
if (data->have_vout)
return -ENODATA;
ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX);
break;
case PMBUS_VIRT_READ_IOUT_MAX:
@ -147,10 +141,8 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
break;
case PMBUS_VIRT_READ_PIN_MAX:
if (data->id == adm1275) {
ret = -ENXIO;
break;
}
if (!data->have_pin_max)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN);
break;
case PMBUS_VIRT_RESET_IOUT_HISTORY:
@ -158,8 +150,8 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
case PMBUS_VIRT_RESET_VIN_HISTORY:
break;
case PMBUS_VIRT_RESET_PIN_HISTORY:
if (data->id == adm1275)
ret = -ENXIO;
if (!data->have_pin_max)
return -ENXIO;
break;
default:
ret = -ENODATA;
@ -215,29 +207,31 @@ static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
if (ret < 0)
break;
if (!data->have_oc_fault && !data->have_uc_fault)
break;
mfr_status = pmbus_read_byte_data(client, page,
PMBUS_STATUS_MFR_SPECIFIC);
if (mfr_status < 0) {
ret = mfr_status;
break;
}
if (mfr_status < 0)
return mfr_status;
if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
ret |= data->have_oc_fault ?
PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
}
break;
case PMBUS_STATUS_VOUT:
if (data->id != adm1075) {
ret = -ENODATA;
break;
}
if (data->have_vout)
return -ENODATA;
ret = 0;
mfr_status = pmbus_read_byte_data(client, 0,
ADM1075_VAUX_STATUS);
if (mfr_status & ADM1075_VAUX_OV_WARN)
ret |= PB_VOLTAGE_OV_WARNING;
if (mfr_status & ADM1075_VAUX_UV_WARN)
ret |= PB_VOLTAGE_UV_WARNING;
if (data->have_vaux_status) {
mfr_status = pmbus_read_byte_data(client, 0,
ADM1075_VAUX_STATUS);
if (mfr_status < 0)
return mfr_status;
if (mfr_status & ADM1075_VAUX_OV_WARN)
ret |= PB_VOLTAGE_OV_WARNING;
if (mfr_status & ADM1075_VAUX_UV_WARN)
ret |= PB_VOLTAGE_UV_WARNING;
}
break;
default:
ret = -ENODATA;
@ -328,11 +322,15 @@ static int adm1275_probe(struct i2c_client *client,
info->read_byte_data = adm1275_read_byte_data;
info->write_word_data = adm1275_write_word_data;
if (device_config & ADM1275_IOUT_WARN2_SELECT)
data->have_oc_fault = true;
switch (data->id) {
case adm1075:
if (device_config & ADM1275_IOUT_WARN2_SELECT)
data->have_oc_fault = true;
else
data->have_uc_fault = true;
data->have_pin_max = true;
data->have_vaux_status = true;
coefficients = adm1075_coefficients;
vindex = 0;
switch (config & ADM1075_IRANGE_MASK) {
@ -356,6 +354,12 @@ static int adm1275_probe(struct i2c_client *client,
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
break;
case adm1275:
if (device_config & ADM1275_IOUT_WARN2_SELECT)
data->have_oc_fault = true;
else
data->have_uc_fault = true;
data->have_vout = true;
coefficients = adm1275_coefficients;
vindex = (config & ADM1275_VRANGE) ? 0 : 1;
cindex = 2;
@ -368,6 +372,13 @@ static int adm1275_probe(struct i2c_client *client,
PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
break;
case adm1276:
if (device_config & ADM1275_IOUT_WARN2_SELECT)
data->have_oc_fault = true;
else
data->have_uc_fault = true;
data->have_vout = true;
data->have_pin_max = true;
coefficients = adm1276_coefficients;
vindex = (config & ADM1275_VRANGE) ? 0 : 1;
cindex = 2;