Prefixes: 'max34446'
Addresses scanned: -
Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX34446.pdf
+ * Maxim MAX34451
+ PMBus 16-Channel V/I Monitor and 12-Channel Sequencer/Marginer
+ Prefixes: 'max34451'
+ Addresses scanned: -
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX34451.pdf
* Maxim MAX34460
PMBus 12-Channel Voltage Monitor & Sequencer
Prefix: 'max34460'
This driver supports hardware monitoring for Maxim MAX34440 PMBus 6-Channel
Power-Supply Manager, MAX34441 PMBus 5-Channel Power-Supply Manager
and Intelligent Fan Controller, and MAX34446 PMBus Power-Supply Data Logger.
-It also supports the MAX34460 and MAX34461 PMBus Voltage Monitor & Sequencers.
-The MAX34460 supports 12 voltage channels, and the MAX34461 supports 16 voltage
-channels.
+It also supports the MAX34451, MAX34460, and MAX34461 PMBus Voltage Monitor &
+Sequencers. The MAX34451 supports monitoring voltage or current of 12 channels
+based on GIN pins. The MAX34460 supports 12 voltage channels, and the MAX34461
+supports 16 voltage channels.
The driver is a client driver to the core PMBus driver. Please see
Documentation/hwmon/pmbus for details on PMBus client drivers.
curr[1-6]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT register.
curr[1-6]_max_alarm Current high alarm. From IOUT_OC_WARNING status.
curr[1-6]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status.
-curr[1-4]_average Historical average current (MAX34446 only).
+curr[1-4]_average Historical average current (MAX34446/34451 only).
curr[1-6]_highest Historical maximum current.
curr[1-6]_reset_history Write any value to reset history.
temp7 and temp8 attributes only exist for MAX34440.
MAX34446 only supports temp[1-3].
+MAX34451 supports attribute groups in[1-16] (or curr[1-16] based on input pins)
+and temp[1-5].
MAX34460 supports attribute groups in[1-12] and temp[1-5].
MAX34461 supports attribute groups in[1-16] and temp[1-5].
#include <linux/i2c.h>
#include "pmbus.h"
-enum chips { max34440, max34441, max34446, max34460, max34461 };
+enum chips { max34440, max34441, max34446, max34451, max34460, max34461 };
#define MAX34440_MFR_VOUT_PEAK 0xd4
#define MAX34440_MFR_IOUT_PEAK 0xd5
#define MAX34440_STATUS_OT_FAULT BIT(5)
#define MAX34440_STATUS_OT_WARN BIT(6)
+#define MAX34451_MFR_CHANNEL_CONFIG 0xe4
+#define MAX34451_MFR_CHANNEL_CONFIG_SEL_MASK 0x3f
+
struct max34440_data {
int id;
struct pmbus_driver_info info;
MAX34440_MFR_VOUT_PEAK);
break;
case PMBUS_VIRT_READ_IOUT_AVG:
- if (data->id != max34446)
+ if (data->id != max34446 && data->id != max34451)
return -ENXIO;
ret = pmbus_read_word_data(client, page,
MAX34446_MFR_IOUT_AVG);
case PMBUS_VIRT_RESET_IOUT_HISTORY:
ret = pmbus_write_word_data(client, page,
MAX34440_MFR_IOUT_PEAK, 0);
- if (!ret && data->id == max34446)
+ if (!ret && (data->id == max34446 || data->id == max34451))
ret = pmbus_write_word_data(client, page,
MAX34446_MFR_IOUT_AVG, 0);
return ret;
}
+static int max34451_set_supported_funcs(struct i2c_client *client,
+ struct max34440_data *data)
+{
+ /*
+ * Each of the channel 0-15 can be configured to monitor the following
+ * functions based on MFR_CHANNEL_CONFIG[5:0]
+ * 0x10: Sequencing + voltage monitoring (only valid for PAGES 0–11)
+ * 0x20: Voltage monitoring (no sequencing)
+ * 0x21: Voltage read only
+ * 0x22: Current monitoring
+ * 0x23: Current read only
+ * 0x30: General-purpose input active low
+ * 0x34: General-purpose input active high
+ * 0x00: Disabled
+ */
+
+ int page, rv;
+
+ for (page = 0; page < 16; page++) {
+ rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
+ if (rv < 0)
+ return rv;
+
+ rv = i2c_smbus_read_word_data(client,
+ MAX34451_MFR_CHANNEL_CONFIG);
+ if (rv < 0)
+ return rv;
+
+ switch (rv & MAX34451_MFR_CHANNEL_CONFIG_SEL_MASK) {
+ case 0x10:
+ case 0x20:
+ data->info.func[page] = PMBUS_HAVE_VOUT |
+ PMBUS_HAVE_STATUS_VOUT;
+ break;
+ case 0x21:
+ data->info.func[page] = PMBUS_HAVE_VOUT;
+ break;
+ case 0x22:
+ data->info.func[page] = PMBUS_HAVE_IOUT |
+ PMBUS_HAVE_STATUS_IOUT;
+ break;
+ case 0x23:
+ data->info.func[page] = PMBUS_HAVE_IOUT;
+ break;
+ default:
+ break;
+ }
+ }
+
+ return 0;
+}
+
static struct pmbus_driver_info max34440_info[] = {
[max34440] = {
.pages = 14,
.read_word_data = max34440_read_word_data,
.write_word_data = max34440_write_word_data,
},
+ [max34451] = {
+ .pages = 21,
+ .format[PSC_VOLTAGE_OUT] = direct,
+ .format[PSC_TEMPERATURE] = direct,
+ .format[PSC_CURRENT_OUT] = direct,
+ .m[PSC_VOLTAGE_OUT] = 1,
+ .b[PSC_VOLTAGE_OUT] = 0,
+ .R[PSC_VOLTAGE_OUT] = 3,
+ .m[PSC_CURRENT_OUT] = 1,
+ .b[PSC_CURRENT_OUT] = 0,
+ .R[PSC_CURRENT_OUT] = 2,
+ .m[PSC_TEMPERATURE] = 1,
+ .b[PSC_TEMPERATURE] = 0,
+ .R[PSC_TEMPERATURE] = 2,
+ /* func 0-15 is set dynamically before probing */
+ .func[16] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
+ .func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
+ .func[18] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
+ .func[19] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
+ .func[20] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
+ .read_byte_data = max34440_read_byte_data,
+ .read_word_data = max34440_read_word_data,
+ .write_word_data = max34440_write_word_data,
+ },
[max34460] = {
.pages = 18,
.format[PSC_VOLTAGE_OUT] = direct,
const struct i2c_device_id *id)
{
struct max34440_data *data;
+ int rv;
data = devm_kzalloc(&client->dev, sizeof(struct max34440_data),
GFP_KERNEL);
data->id = id->driver_data;
data->info = max34440_info[id->driver_data];
+ if (data->id == max34451) {
+ rv = max34451_set_supported_funcs(client, data);
+ if (rv)
+ return rv;
+ }
+
return pmbus_do_probe(client, id, &data->info);
}
{"max34440", max34440},
{"max34441", max34441},
{"max34446", max34446},
+ {"max34451", max34451},
{"max34460", max34460},
{"max34461", max34461},
{}