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hwmon: (pmbus/lm25066) Add support for LM25056
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck
parent
e53e6497fc
commit
58615a94f6
@ -1,7 +1,13 @@
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Kernel driver max8688
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Kernel driver lm25066
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=====================
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Supported chips:
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* TI LM25056
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Prefix: 'lm25056'
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Addresses scanned: -
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Datasheets:
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http://www.ti.com/lit/gpn/lm25056
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http://www.ti.com/lit/gpn/lm25056a
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* National Semiconductor LM25066
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Prefix: 'lm25066'
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Addresses scanned: -
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@ -25,8 +31,9 @@ Author: Guenter Roeck <linux@roeck-us.net>
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Description
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-----------
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This driver supports hardware montoring for National Semiconductor LM25066,
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LM5064, and LM5064 Power Management, Monitoring, Control, and Protection ICs.
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This driver supports hardware montoring for National Semiconductor / TI LM25056,
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LM25066, LM5064, and LM5064 Power Management, Monitoring, Control, and
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Protection ICs.
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The driver is a client driver to the core PMBus driver. Please see
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Documentation/hwmon/pmbus for details on PMBus client drivers.
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@ -62,8 +69,13 @@ in1_max_alarm Input voltage high alarm.
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in2_label "vmon"
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in2_input Measured voltage on VAUX pin
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in2_min Minimum VAUX voltage (LM25056 only).
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in2_max Maximum VAUX voltage (LM25056 only).
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in2_min_alarm VAUX voltage low alarm (LM25056 only).
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in2_max_alarm VAUX voltage high alarm (LM25056 only).
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in3_label "vout1"
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Not supported on LM25056.
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in3_input Measured output voltage.
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in3_average Average measured output voltage.
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in3_min Minimum output voltage.
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@ -42,7 +42,7 @@ config SENSORS_LM25066
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default n
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help
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If you say yes here you get hardware monitoring support for National
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Semiconductor LM25066, LM5064, and LM5066.
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Semiconductor LM25056, LM25066, LM5064, and LM5066.
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This driver can also be built as a module. If so, the module will
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be called lm25066.
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@ -1,5 +1,5 @@
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/*
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* Hardware monitoring driver for LM25066 / LM5064 / LM5066
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* Hardware monitoring driver for LM25056 / LM25066 / LM5064 / LM5066
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*
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* Copyright (c) 2011 Ericsson AB.
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* Copyright (c) 2013 Guenter Roeck
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@ -27,7 +27,7 @@
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#include <linux/i2c.h>
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#include "pmbus.h"
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enum chips { lm25066, lm5064, lm5066 };
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enum chips { lm25056, lm25066, lm5064, lm5066 };
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#define LM25066_READ_VAUX 0xd0
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#define LM25066_MFR_READ_IIN 0xd1
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@ -44,6 +44,14 @@ enum chips { lm25066, lm5064, lm5066 };
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#define LM25066_DEV_SETUP_CL (1 << 4) /* Current limit */
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/* LM25056 only */
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#define LM25056_VAUX_OV_WARN_LIMIT 0xe3
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#define LM25056_VAUX_UV_WARN_LIMIT 0xe4
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#define LM25056_MFR_STS_VAUX_OV_WARN (1 << 1)
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#define LM25056_MFR_STS_VAUX_UV_WARN (1 << 0)
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struct __coeff {
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short m, b, R;
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};
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@ -51,7 +59,34 @@ struct __coeff {
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#define PSC_CURRENT_IN_L (PSC_NUM_CLASSES)
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#define PSC_POWER_L (PSC_NUM_CLASSES + 1)
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static struct __coeff lm25066_coeff[3][PSC_NUM_CLASSES + 2] = {
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static struct __coeff lm25066_coeff[4][PSC_NUM_CLASSES + 2] = {
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[lm25056] = {
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[PSC_VOLTAGE_IN] = {
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.m = 16296,
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.R = -2,
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},
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[PSC_CURRENT_IN] = {
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.m = 13797,
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.R = -2,
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},
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[PSC_CURRENT_IN_L] = {
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.m = 6726,
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.R = -2,
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},
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[PSC_POWER] = {
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.m = 5501,
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.R = -3,
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},
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[PSC_POWER_L] = {
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.m = 26882,
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.R = -4,
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},
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[PSC_TEMPERATURE] = {
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.m = 1580,
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.b = -14500,
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.R = -2,
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},
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},
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[lm25066] = {
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[PSC_VOLTAGE_IN] = {
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.m = 22070,
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@ -161,6 +196,10 @@ static int lm25066_read_word_data(struct i2c_client *client, int page, int reg)
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break;
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/* Adjust returned value to match VIN coefficients */
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switch (data->id) {
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case lm25056:
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/* VIN: 6.14 mV VAUX: 293 uV LSB */
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ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
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break;
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case lm25066:
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/* VIN: 4.54 mV VAUX: 283.2 uV LSB */
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ret = DIV_ROUND_CLOSEST(ret * 2832, 45400);
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@ -214,6 +253,58 @@ static int lm25066_read_word_data(struct i2c_client *client, int page, int reg)
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return ret;
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}
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static int lm25056_read_word_data(struct i2c_client *client, int page, int reg)
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{
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int ret;
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switch (reg) {
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case PMBUS_VIRT_VMON_UV_WARN_LIMIT:
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ret = pmbus_read_word_data(client, 0,
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LM25056_VAUX_UV_WARN_LIMIT);
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if (ret < 0)
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break;
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/* Adjust returned value to match VIN coefficients */
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ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
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break;
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case PMBUS_VIRT_VMON_OV_WARN_LIMIT:
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ret = pmbus_read_word_data(client, 0,
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LM25056_VAUX_OV_WARN_LIMIT);
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if (ret < 0)
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break;
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/* Adjust returned value to match VIN coefficients */
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ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
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break;
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default:
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ret = lm25066_read_word_data(client, page, reg);
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break;
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}
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return ret;
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}
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static int lm25056_read_byte_data(struct i2c_client *client, int page, int reg)
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{
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int ret, s;
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switch (reg) {
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case PMBUS_VIRT_STATUS_VMON:
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ret = pmbus_read_byte_data(client, 0,
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PMBUS_STATUS_MFR_SPECIFIC);
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if (ret < 0)
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break;
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s = 0;
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if (ret & LM25056_MFR_STS_VAUX_UV_WARN)
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s |= PB_VOLTAGE_UV_WARNING;
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if (ret & LM25056_MFR_STS_VAUX_OV_WARN)
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s |= PB_VOLTAGE_OV_WARNING;
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ret = s;
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break;
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default:
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ret = -ENODATA;
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break;
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}
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return ret;
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}
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static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
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u16 word)
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{
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@ -243,6 +334,22 @@ static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
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word);
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pmbus_clear_cache(client);
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break;
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case PMBUS_VIRT_VMON_UV_WARN_LIMIT:
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/* Adjust from VIN coefficients (for LM25056) */
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word = DIV_ROUND_CLOSEST((int)word * 6140, 293);
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word = ((s16)word < 0) ? 0 : clamp_val(word, 0, 0x0fff);
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ret = pmbus_write_word_data(client, 0,
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LM25056_VAUX_UV_WARN_LIMIT, word);
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pmbus_clear_cache(client);
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break;
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case PMBUS_VIRT_VMON_OV_WARN_LIMIT:
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/* Adjust from VIN coefficients (for LM25056) */
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word = DIV_ROUND_CLOSEST((int)word * 6140, 293);
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word = ((s16)word < 0) ? 0 : clamp_val(word, 0, 0x0fff);
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ret = pmbus_write_word_data(client, 0,
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LM25056_VAUX_OV_WARN_LIMIT, word);
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pmbus_clear_cache(client);
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break;
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case PMBUS_VIRT_RESET_PIN_HISTORY:
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ret = pmbus_write_byte(client, 0, LM25066_CLEAR_PIN_PEAK);
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break;
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@ -284,12 +391,18 @@ static int lm25066_probe(struct i2c_client *client,
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info->format[PSC_TEMPERATURE] = direct;
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info->format[PSC_POWER] = direct;
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info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VMON
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| PMBUS_HAVE_PIN | PMBUS_HAVE_IIN | PMBUS_HAVE_STATUS_INPUT
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| PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
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info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VMON | PMBUS_HAVE_VOUT
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| PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_PIN | PMBUS_HAVE_IIN
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| PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
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info->read_word_data = lm25066_read_word_data;
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if (data->id == lm25056) {
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info->func[0] |= PMBUS_HAVE_STATUS_VMON;
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info->read_word_data = lm25056_read_word_data;
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info->read_byte_data = lm25056_read_byte_data;
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} else {
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info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
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info->read_word_data = lm25066_read_word_data;
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}
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info->write_word_data = lm25066_write_word_data;
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coeff = &lm25066_coeff[data->id][0];
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@ -318,6 +431,7 @@ static int lm25066_probe(struct i2c_client *client,
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}
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static const struct i2c_device_id lm25066_id[] = {
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{"lm25056", lm25056},
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{"lm25066", lm25066},
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{"lm5064", lm5064},
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{"lm5066", lm5066},
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@ -339,5 +453,5 @@ static struct i2c_driver lm25066_driver = {
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module_i2c_driver(lm25066_driver);
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MODULE_AUTHOR("Guenter Roeck");
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MODULE_DESCRIPTION("PMBus driver for LM25066/LM5064/LM5066");
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MODULE_DESCRIPTION("PMBus driver for LM25056/LM25066/LM5064/LM5066");
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MODULE_LICENSE("GPL");
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