diff options
Diffstat (limited to 'drivers/hwmon/pmbus/zl6100.c')
| -rw-r--r-- | drivers/hwmon/pmbus/zl6100.c | 43 |
1 files changed, 36 insertions, 7 deletions
diff --git a/drivers/hwmon/pmbus/zl6100.c b/drivers/hwmon/pmbus/zl6100.c index 2bc980006f8..48c7b4a716a 100644 --- a/drivers/hwmon/pmbus/zl6100.c +++ b/drivers/hwmon/pmbus/zl6100.c @@ -28,7 +28,7 @@ #include <linux/delay.h> #include "pmbus.h" -enum chips { zl2004, zl2006, zl2008, zl2105, zl2106, zl6100, zl6105 }; +enum chips { zl2004, zl2005, zl2006, zl2008, zl2105, zl2106, zl6100, zl6105 }; struct zl6100_data { int id; @@ -38,8 +38,11 @@ struct zl6100_data { #define to_zl6100_data(x) container_of(x, struct zl6100_data, info) +#define ZL6100_MFR_CONFIG 0xd0 #define ZL6100_DEVICE_ID 0xe4 +#define ZL6100_MFR_XTEMP_ENABLE (1 << 7) + #define ZL6100_WAIT_TIME 1000 /* uS */ static ushort delay = ZL6100_WAIT_TIME; @@ -65,6 +68,19 @@ static int zl6100_read_word_data(struct i2c_client *client, int page, int reg) if (page || reg >= PMBUS_VIRT_BASE) return -ENXIO; + if (data->id == zl2005) { + /* + * Limit register detection is not reliable on ZL2005. + * Make sure registers are not erroneously detected. + */ + switch (reg) { + case PMBUS_VOUT_OV_WARN_LIMIT: + case PMBUS_VOUT_UV_WARN_LIMIT: + case PMBUS_IOUT_OC_WARN_LIMIT: + return -ENXIO; + } + } + zl6100_wait(data); ret = pmbus_read_word_data(client, page, reg); data->access = ktime_get(); @@ -122,7 +138,13 @@ static int zl6100_write_byte(struct i2c_client *client, int page, u8 value) } static const struct i2c_device_id zl6100_id[] = { + {"bmr450", zl2005}, + {"bmr451", zl2005}, + {"bmr462", zl2008}, + {"bmr463", zl2008}, + {"bmr464", zl2008}, {"zl2004", zl2004}, + {"zl2005", zl2005}, {"zl2006", zl2006}, {"zl2008", zl2008}, {"zl2105", zl2105}, @@ -143,7 +165,7 @@ static int zl6100_probe(struct i2c_client *client, const struct i2c_device_id *mid; if (!i2c_check_functionality(client->adapter, - I2C_FUNC_SMBUS_READ_BYTE_DATA + I2C_FUNC_SMBUS_READ_WORD_DATA | I2C_FUNC_SMBUS_READ_BLOCK_DATA)) return -ENODEV; @@ -177,8 +199,9 @@ static int zl6100_probe(struct i2c_client *client, data->id = mid->driver_data; /* - * ZL2008, ZL2105, and ZL6100 are known to require a wait time + * ZL2005, ZL2008, ZL2105, and ZL6100 are known to require a wait time * between I2C accesses. ZL2004 and ZL6105 are known to be safe. + * Other chips have not yet been tested. * * Only clear the wait time for chips known to be safe. The wait time * can be cleared later for additional chips if tests show that it @@ -190,12 +213,9 @@ static int zl6100_probe(struct i2c_client *client, /* * Since there was a direct I2C device access above, wait before * accessing the chip again. - * Set the timestamp, wait, then set it again. This should provide - * enough buffer time to be safe. */ data->access = ktime_get(); zl6100_wait(data); - data->access = ktime_get(); info = &data->info; @@ -203,7 +223,16 @@ static int zl6100_probe(struct i2c_client *client, info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT - | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_STATUS_TEMP; + | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; + + ret = i2c_smbus_read_word_data(client, ZL6100_MFR_CONFIG); + if (ret < 0) + goto err_mem; + if (ret & ZL6100_MFR_XTEMP_ENABLE) + info->func[0] |= PMBUS_HAVE_TEMP2; + + data->access = ktime_get(); + zl6100_wait(data); info->read_word_data = zl6100_read_word_data; info->read_byte_data = zl6100_read_byte_data; |