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path: root/drivers/hwmon/pmbus/adm1275.c
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Diffstat (limited to 'drivers/hwmon/pmbus/adm1275.c')
-rw-r--r--drivers/hwmon/pmbus/adm1275.c159
1 files changed, 141 insertions, 18 deletions
diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c
index c936e278230..980a4d9d502 100644
--- a/drivers/hwmon/pmbus/adm1275.c
+++ b/drivers/hwmon/pmbus/adm1275.c
@@ -23,6 +23,8 @@
#include <linux/i2c.h>
#include "pmbus.h"
+enum chips { adm1275, adm1276 };
+
#define ADM1275_PEAK_IOUT 0xd0
#define ADM1275_PEAK_VIN 0xd1
#define ADM1275_PEAK_VOUT 0xd2
@@ -31,14 +33,47 @@
#define ADM1275_VIN_VOUT_SELECT (1 << 6)
#define ADM1275_VRANGE (1 << 5)
+#define ADM1275_IOUT_WARN2_LIMIT 0xd7
+#define ADM1275_DEVICE_CONFIG 0xd8
+
+#define ADM1275_IOUT_WARN2_SELECT (1 << 4)
+
+#define ADM1276_PEAK_PIN 0xda
+
+#define ADM1275_MFR_STATUS_IOUT_WARN2 (1 << 0)
+
+struct adm1275_data {
+ int id;
+ bool have_oc_fault;
+ struct pmbus_driver_info info;
+};
+
+#define to_adm1275_data(x) container_of(x, struct adm1275_data, info)
+
static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
{
- int ret;
+ const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
+ const struct adm1275_data *data = to_adm1275_data(info);
+ int ret = 0;
if (page)
- return -EINVAL;
+ return -ENXIO;
switch (reg) {
+ case PMBUS_IOUT_UC_FAULT_LIMIT:
+ if (data->have_oc_fault) {
+ ret = -ENXIO;
+ break;
+ }
+ 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;
+ }
+ ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
+ break;
case PMBUS_VIRT_READ_IOUT_MAX:
ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT);
break;
@@ -48,10 +83,20 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
case PMBUS_VIRT_READ_VIN_MAX:
ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
break;
+ case PMBUS_VIRT_READ_PIN_MAX:
+ if (data->id != adm1276) {
+ ret = -ENXIO;
+ break;
+ }
+ ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN);
+ break;
case PMBUS_VIRT_RESET_IOUT_HISTORY:
case PMBUS_VIRT_RESET_VOUT_HISTORY:
case PMBUS_VIRT_RESET_VIN_HISTORY:
- ret = 0;
+ break;
+ case PMBUS_VIRT_RESET_PIN_HISTORY:
+ if (data->id != adm1276)
+ ret = -ENXIO;
break;
default:
ret = -ENODATA;
@@ -66,9 +111,14 @@ static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
int ret;
if (page)
- return -EINVAL;
+ return -ENXIO;
switch (reg) {
+ case PMBUS_IOUT_UC_FAULT_LIMIT:
+ case PMBUS_IOUT_OC_FAULT_LIMIT:
+ ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT,
+ word);
+ break;
case PMBUS_VIRT_RESET_IOUT_HISTORY:
ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
break;
@@ -78,6 +128,41 @@ static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
case PMBUS_VIRT_RESET_VIN_HISTORY:
ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
break;
+ case PMBUS_VIRT_RESET_PIN_HISTORY:
+ ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+ return ret;
+}
+
+static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
+{
+ const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
+ const struct adm1275_data *data = to_adm1275_data(info);
+ int mfr_status, ret;
+
+ if (page > 0)
+ return -ENXIO;
+
+ switch (reg) {
+ case PMBUS_STATUS_IOUT:
+ ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
+ if (ret < 0)
+ break;
+ mfr_status = pmbus_read_byte_data(client, page,
+ PMBUS_STATUS_MFR_SPECIFIC);
+ if (mfr_status < 0) {
+ ret = mfr_status;
+ break;
+ }
+ if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
+ ret |= data->have_oc_fault ?
+ PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
+ }
+ break;
default:
ret = -ENODATA;
break;
@@ -88,16 +173,17 @@ static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
static int adm1275_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- int config;
+ int config, device_config;
int ret;
struct pmbus_driver_info *info;
+ struct adm1275_data *data;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_READ_BYTE_DATA))
return -ENODEV;
- info = kzalloc(sizeof(struct pmbus_driver_info), GFP_KERNEL);
- if (!info)
+ data = kzalloc(sizeof(struct adm1275_data), GFP_KERNEL);
+ if (!data)
return -ENOMEM;
config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
@@ -106,6 +192,15 @@ static int adm1275_probe(struct i2c_client *client,
goto err_mem;
}
+ device_config = i2c_smbus_read_byte_data(client, ADM1275_DEVICE_CONFIG);
+ if (device_config < 0) {
+ ret = device_config;
+ goto err_mem;
+ }
+
+ data->id = id->driver_data;
+ info = &data->info;
+
info->pages = 1;
info->format[PSC_VOLTAGE_IN] = direct;
info->format[PSC_VOLTAGE_OUT] = direct;
@@ -116,6 +211,7 @@ static int adm1275_probe(struct i2c_client *client,
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 (config & ADM1275_VRANGE) {
@@ -134,10 +230,36 @@ static int adm1275_probe(struct i2c_client *client,
info->R[PSC_VOLTAGE_OUT] = -1;
}
- if (config & ADM1275_VIN_VOUT_SELECT)
- info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
- else
- info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
+ if (device_config & ADM1275_IOUT_WARN2_SELECT)
+ data->have_oc_fault = true;
+
+ switch (id->driver_data) {
+ case adm1275:
+ if (config & ADM1275_VIN_VOUT_SELECT)
+ info->func[0] |=
+ PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
+ else
+ info->func[0] |=
+ PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
+ break;
+ case adm1276:
+ info->format[PSC_POWER] = direct;
+ 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;
+ }
ret = pmbus_do_probe(client, id, info);
if (ret)
@@ -145,22 +267,23 @@ static int adm1275_probe(struct i2c_client *client,
return 0;
err_mem:
- kfree(info);
+ kfree(data);
return ret;
}
static int adm1275_remove(struct i2c_client *client)
{
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
- int ret;
+ const struct adm1275_data *data = to_adm1275_data(info);
- ret = pmbus_do_remove(client);
- kfree(info);
- return ret;
+ pmbus_do_remove(client);
+ kfree(data);
+ return 0;
}
static const struct i2c_device_id adm1275_id[] = {
- {"adm1275", 0},
+ { "adm1275", adm1275 },
+ { "adm1276", adm1276 },
{ }
};
MODULE_DEVICE_TABLE(i2c, adm1275_id);
@@ -185,7 +308,7 @@ static void __exit adm1275_exit(void)
}
MODULE_AUTHOR("Guenter Roeck");
-MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275");
+MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
MODULE_LICENSE("GPL");
module_init(adm1275_init);
module_exit(adm1275_exit);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-21 06:54:41 +0000