/*
* An hwmon driver for the 3Y Power YM-2651Y Power Module
*
* Copyright (C) 2014 Accton Technology Corporation.
* Brandon Chuang <brandon_chuang@accton.com.tw>
*
* Based on ad7414.c
* Copyright 2006 Stefan Roese <sr at denx.de>, DENX Software Engineering
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/slab.h>
#define MAX_FAN_DUTY_CYCLE 100
/* Addresses scanned
*/
static const unsigned short normal_i2c[] = { 0x58, 0x5b, I2C_CLIENT_END };
enum chips {
YM2651,
YM2401,
YM2851,
YPEB1200AM
};
/* Each client has this additional data
*/
struct ym2651y_data {
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* !=0 if registers are valid */
unsigned long last_updated; /* In jiffies */
u8 chip; /* chip id */
u8 capability; /* Register value */
u16 status_word; /* Register value */
u8 fan_fault; /* Register value */
u8 over_temp; /* Register value */
u16 v_out; /* Register value */
u16 i_out; /* Register value */
u16 p_out; /* Register value */
u8 vout_mode; /* Register value */
u16 temp; /* Register value */
u16 fan_speed; /* Register value */
u16 fan_duty_cycle[2]; /* Register value */
u8 fan_dir[4]; /* Register value */
u8 pmbus_revision; /* Register value */
u8 mfr_id[10]; /* Register value */
u8 mfr_model[10]; /* Register value */
u8 mfr_revsion[3]; /* Register value */
u16 mfr_vin_min; /* Register value */
u16 mfr_vin_max; /* Register value */
u16 mfr_iin_max; /* Register value */
u16 mfr_iout_max; /* Register value */
u16 mfr_pin_max; /* Register value */
u16 mfr_pout_max; /* Register value */
u16 mfr_vout_min; /* Register value */
u16 mfr_vout_max; /* Register value */
};
static ssize_t show_vout(struct device *dev, struct device_attribute *da,
char *buf);
static ssize_t show_byte(struct device *dev, struct device_attribute *da,
char *buf);
static ssize_t show_word(struct device *dev, struct device_attribute *da,
char *buf);
static ssize_t show_linear(struct device *dev, struct device_attribute *da,
char *buf);
static ssize_t show_fan_fault(struct device *dev, struct device_attribute *da,
char *buf);
static ssize_t show_over_temp(struct device *dev, struct device_attribute *da,
char *buf);
static ssize_t show_ascii(struct device *dev, struct device_attribute *da,
char *buf);
static struct ym2651y_data *ym2651y_update_device(struct device *dev);
static ssize_t set_fan_duty_cycle(struct device *dev, struct device_attribute *da,
const char *buf, size_t count);
static int ym2651y_write_word(struct i2c_client *client, u8 reg, u16 value);
enum ym2651y_sysfs_attributes {
PSU_POWER_ON = 0,
PSU_TEMP_FAULT,
PSU_POWER_GOOD,
PSU_FAN1_FAULT,
PSU_FAN_DIRECTION,
PSU_OVER_TEMP,
PSU_V_OUT,
PSU_I_OUT,
PSU_P_OUT,
PSU_P_OUT_UV, /*In Unit of microVolt, instead of mini.*/
PSU_TEMP1_INPUT,
PSU_FAN1_SPEED,
PSU_FAN1_DUTY_CYCLE,
PSU_PMBUS_REVISION,
PSU_MFR_ID,
PSU_MFR_MODEL,
PSU_MFR_REVISION,
PSU_MFR_VIN_MIN,
PSU_MFR_VIN_MAX,
PSU_MFR_VOUT_MIN,
PSU_MFR_VOUT_MAX,
PSU_MFR_IIN_MAX,
PSU_MFR_IOUT_MAX,
PSU_MFR_PIN_MAX,
PSU_MFR_POUT_MAX
};
/* sysfs attributes for hwmon
*/
static SENSOR_DEVICE_ATTR(psu_power_on, S_IRUGO, show_word, NULL, PSU_POWER_ON);
static SENSOR_DEVICE_ATTR(psu_temp_fault, S_IRUGO, show_word, NULL, PSU_TEMP_FAULT);
static SENSOR_DEVICE_ATTR(psu_power_good, S_IRUGO, show_word, NULL, PSU_POWER_GOOD);
static SENSOR_DEVICE_ATTR(psu_fan1_fault, S_IRUGO, show_fan_fault, NULL, PSU_FAN1_FAULT);
static SENSOR_DEVICE_ATTR(psu_over_temp, S_IRUGO, show_over_temp, NULL, PSU_OVER_TEMP);
static SENSOR_DEVICE_ATTR(psu_v_out, S_IRUGO, show_vout, NULL, PSU_V_OUT);
static SENSOR_DEVICE_ATTR(psu_i_out, S_IRUGO, show_linear, NULL, PSU_I_OUT);
static SENSOR_DEVICE_ATTR(psu_p_out, S_IRUGO, show_linear, NULL, PSU_P_OUT);
static SENSOR_DEVICE_ATTR(psu_temp1_input, S_IRUGO, show_linear, NULL, PSU_TEMP1_INPUT);
static SENSOR_DEVICE_ATTR(psu_fan1_speed_rpm, S_IRUGO, show_linear, NULL, PSU_FAN1_SPEED);
static SENSOR_DEVICE_ATTR(psu_fan1_duty_cycle_percentage, S_IWUSR | S_IRUGO, show_linear, set_fan_duty_cycle, PSU_FAN1_DUTY_CYCLE);
static SENSOR_DEVICE_ATTR(psu_fan_dir, S_IRUGO, show_ascii, NULL, PSU_FAN_DIRECTION);
static SENSOR_DEVICE_ATTR(psu_pmbus_revision, S_IRUGO, show_byte, NULL, PSU_PMBUS_REVISION);
static SENSOR_DEVICE_ATTR(psu_mfr_id, S_IRUGO, show_ascii, NULL, PSU_MFR_ID);
static SENSOR_DEVICE_ATTR(psu_mfr_model, S_IRUGO, show_ascii, NULL, PSU_MFR_MODEL);
static SENSOR_DEVICE_ATTR(psu_mfr_revision, S_IRUGO, show_ascii, NULL, PSU_MFR_REVISION);
static SENSOR_DEVICE_ATTR(psu_mfr_vin_min, S_IRUGO, show_linear, NULL, PSU_MFR_VIN_MIN);
static SENSOR_DEVICE_ATTR(psu_mfr_vin_max, S_IRUGO, show_linear, NULL, PSU_MFR_VIN_MAX);
static SENSOR_DEVICE_ATTR(psu_mfr_vout_min, S_IRUGO, show_linear, NULL, PSU_MFR_VOUT_MIN);
static SENSOR_DEVICE_ATTR(psu_mfr_vout_max, S_IRUGO, show_linear, NULL, PSU_MFR_VOUT_MAX);
static SENSOR_DEVICE_ATTR(psu_mfr_iin_max, S_IRUGO, show_linear, NULL, PSU_MFR_IIN_MAX);
static SENSOR_DEVICE_ATTR(psu_mfr_iout_max, S_IRUGO, show_linear, NULL, PSU_MFR_IOUT_MAX);
static SENSOR_DEVICE_ATTR(psu_mfr_pin_max, S_IRUGO, show_linear, NULL, PSU_MFR_PIN_MAX);
static SENSOR_DEVICE_ATTR(psu_mfr_pout_max, S_IRUGO, show_linear, NULL, PSU_MFR_POUT_MAX);
/*Duplicate nodes for lm-sensors.*/
static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_vout, NULL, PSU_V_OUT);
static SENSOR_DEVICE_ATTR(curr2_input, S_IRUGO, show_linear, NULL, PSU_I_OUT);
static SENSOR_DEVICE_ATTR(power2_input, S_IRUGO, show_linear, NULL, PSU_P_OUT_UV);
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_linear, NULL, PSU_TEMP1_INPUT);
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_linear, NULL, PSU_FAN1_SPEED);
static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_word, NULL, PSU_TEMP_FAULT);
static struct attribute *ym2651y_attributes[] = {
&sensor_dev_attr_psu_power_on.dev_attr.attr,
&sensor_dev_attr_psu_temp_fault.dev_attr.attr,
&sensor_dev_attr_psu_power_good.dev_attr.attr,
&sensor_dev_attr_psu_fan1_fault.dev_attr.attr,
&sensor_dev_attr_psu_over_temp.dev_attr.attr,
&sensor_dev_attr_psu_v_out.dev_attr.attr,
&sensor_dev_attr_psu_i_out.dev_attr.attr,
&sensor_dev_attr_psu_p_out.dev_attr.attr,
&sensor_dev_attr_psu_temp1_input.dev_attr.attr,
&sensor_dev_attr_psu_fan1_speed_rpm.dev_attr.attr,
&sensor_dev_attr_psu_fan1_duty_cycle_percentage.dev_attr.attr,
&sensor_dev_attr_psu_fan_dir.dev_attr.attr,
&sensor_dev_attr_psu_pmbus_revision.dev_attr.attr,
&sensor_dev_attr_psu_mfr_id.dev_attr.attr,
&sensor_dev_attr_psu_mfr_model.dev_attr.attr,
&sensor_dev_attr_psu_mfr_revision.dev_attr.attr,
&sensor_dev_attr_psu_mfr_vin_min.dev_attr.attr,
&sensor_dev_attr_psu_mfr_vin_max.dev_attr.attr,
&sensor_dev_attr_psu_mfr_pout_max.dev_attr.attr,
&sensor_dev_attr_psu_mfr_iin_max.dev_attr.attr,
&sensor_dev_attr_psu_mfr_pin_max.dev_attr.attr,
&sensor_dev_attr_psu_mfr_vout_min.dev_attr.attr,
&sensor_dev_attr_psu_mfr_vout_max.dev_attr.attr,
&sensor_dev_attr_psu_mfr_iout_max.dev_attr.attr,
/*Duplicate nodes for lm-sensors.*/
&sensor_dev_attr_curr2_input.dev_attr.attr,
&sensor_dev_attr_in3_input.dev_attr.attr,
&sensor_dev_attr_power2_input.dev_attr.attr,
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_fan1_input.dev_attr.attr,
&sensor_dev_attr_temp1_fault.dev_attr.attr,
NULL
};
static ssize_t show_byte(struct device *dev, struct device_attribute *da,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct ym2651y_data *data = ym2651y_update_device(dev);
return (attr->index == PSU_PMBUS_REVISION) ? sprintf(buf, "%d\n", data->pmbus_revision) :
sprintf(buf, "0\n");
}
static ssize_t show_word(struct device *dev, struct device_attribute *da,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct ym2651y_data *data = ym2651y_update_device(dev);
u16 status = 0;
switch (attr->index) {
case PSU_POWER_ON: /* psu_power_on, low byte bit 6 of status_word, 0=>ON, 1=>OFF */
status = (data->status_word & 0x40) ? 0 : 1;
break;
case PSU_TEMP_FAULT: /* psu_temp_fault, low byte bit 2 of status_word, 0=>Normal, 1=>temp fault */
status = (data->status_word & 0x4) >> 2;
break;
case PSU_POWER_GOOD: /* psu_power_good, high byte bit 3 of status_word, 0=>OK, 1=>FAIL */
status = (data->status_word & 0x800) ? 0 : 1;
break;
}
return sprintf(buf, "%d\n", status);
}
static int two_complement_to_int(u16 data, u8 valid_bit, int mask)
{
u16 valid_data = data & mask;
bool is_negative = valid_data >> (valid_bit - 1);
return is_negative ? (-(((~valid_data) & mask) + 1)) : valid_data;
}
static ssize_t set_fan_duty_cycle(struct device *dev, struct device_attribute *da,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct i2c_client *client = to_i2c_client(dev);
struct ym2651y_data *data = i2c_get_clientdata(client);
int nr = (attr->index == PSU_FAN1_DUTY_CYCLE) ? 0 : 1;
long speed;
int error;
error = kstrtol(buf, 10, &speed);
if (error)
return error;
if (speed < 0 || speed > MAX_FAN_DUTY_CYCLE)
return -EINVAL;
mutex_lock(&data->update_lock);
data->fan_duty_cycle[nr] = speed;
ym2651y_write_word(client, 0x3B + nr, data->fan_duty_cycle[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_linear(struct device *dev, struct device_attribute *da,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct ym2651y_data *data = ym2651y_update_device(dev);
u16 value = 0;
int exponent, mantissa;
int multiplier = 1000;
switch (attr->index) {
case PSU_V_OUT:
value = data->v_out;
break;
case PSU_I_OUT:
value = data->i_out;
break;
case PSU_P_OUT_UV:
multiplier = 1000000; /*For lm-sensors, unit is micro-Volt.*/
/*Passing through*/
case PSU_P_OUT:
value = data->p_out;
break;
case PSU_TEMP1_INPUT:
value = data->temp;
break;
case PSU_FAN1_SPEED:
value = data->fan_speed;
multiplier = 1;
break;
case PSU_FAN1_DUTY_CYCLE:
value = data->fan_duty_cycle[0];
multiplier = 1;
break;
case PSU_MFR_VIN_MIN:
value = data->mfr_vin_min;
break;
case PSU_MFR_VIN_MAX:
value = data->mfr_vin_max;
break;
case PSU_MFR_VOUT_MIN:
value = data->mfr_vout_min;
break;
case PSU_MFR_VOUT_MAX:
value = data->mfr_vout_max;
break;
case PSU_MFR_PIN_MAX:
value = data->mfr_pin_max;
break;
case PSU_MFR_POUT_MAX:
value = data->mfr_pout_max;
break;
case PSU_MFR_IOUT_MAX:
value = data->mfr_iout_max;
break;
case PSU_MFR_IIN_MAX:
value = data->mfr_iin_max;
break;
}
exponent = two_complement_to_int(value >> 11, 5, 0x1f);
mantissa = two_complement_to_int(value & 0x7ff, 11, 0x7ff);
return (exponent >= 0) ? sprintf(buf, "%d\n", (mantissa << exponent) * multiplier) :
sprintf(buf, "%d\n", (mantissa * multiplier) / (1 << -exponent));
}
static ssize_t show_fan_fault(struct device *dev, struct device_attribute *da,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct ym2651y_data *data = ym2651y_update_device(dev);
u8 shift = (attr->index == PSU_FAN1_FAULT) ? 7 : 6;
return sprintf(buf, "%d\n", data->fan_fault >> shift);
}
static ssize_t show_over_temp(struct device *dev, struct device_attribute *da,
char *buf)
{
struct ym2651y_data *data = ym2651y_update_device(dev);
return sprintf(buf, "%d\n", data->over_temp >> 7);
}
static ssize_t show_ascii(struct device *dev, struct device_attribute *da,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct ym2651y_data *data = ym2651y_update_device(dev);
u8 *ptr = NULL;
switch (attr->index) {
case PSU_FAN_DIRECTION: /* psu_fan_dir */
if (data->chip==YPEB1200AM)
{
memcpy(data->fan_dir, "F2B", 3);
data->fan_dir[3]='\0';
}
ptr = data->fan_dir;
break;
case PSU_MFR_ID: /* psu_mfr_id */
ptr = data->mfr_id;
break;
case PSU_MFR_MODEL: /* psu_mfr_model */
ptr = data->mfr_model;
break;
case PSU_MFR_REVISION: /* psu_mfr_revision */
ptr = data->mfr_revsion;
break;
default:
return 0;
}
return sprintf(buf, "%s\n", ptr);
}
static ssize_t show_vout_by_mode(struct device *dev, struct device_attribute *da,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct ym2651y_data *data = ym2651y_update_device(dev);
int exponent, mantissa;
int multiplier = 1000;
if (!data->valid) {
return 0;
}
exponent = two_complement_to_int(data->vout_mode, 5, 0x1f);
switch (attr->index) {
case PSU_MFR_VOUT_MIN:
mantissa = data->mfr_vout_min;
break;
case PSU_MFR_VOUT_MAX:
mantissa = data->mfr_vout_max;
break;
case PSU_V_OUT:
mantissa = data->v_out;
break;
default:
return 0;
}
return (exponent > 0) ? sprintf(buf, "%d\n", (mantissa << exponent) * multiplier) :
sprintf(buf, "%d\n", (mantissa * multiplier) / (1 << -exponent));
}
static ssize_t show_vout(struct device *dev, struct device_attribute *da,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct ym2651y_data *data = i2c_get_clientdata(client);
if (data->chip == YM2401) {
return show_vout_by_mode(dev, da, buf);
}
else {
return show_linear(dev, da, buf);
}
}
static const struct attribute_group ym2651y_group = {
.attrs = ym2651y_attributes,
};
static int ym2651y_probe(struct i2c_client *client,
const struct i2c_device_id *dev_id)
{
struct ym2651y_data *data;
int status;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA |
I2C_FUNC_SMBUS_I2C_BLOCK)) {
status = -EIO;
goto exit;
}
data = kzalloc(sizeof(struct ym2651y_data), GFP_KERNEL);
if (!data) {
status = -ENOMEM;
goto exit;
}
i2c_set_clientdata(client, data);
mutex_init(&data->update_lock);
data->chip = dev_id->driver_data;
dev_info(&client->dev, "chip found\n");
/* Register sysfs hooks */
status = sysfs_create_group(&client->dev.kobj, &ym2651y_group);
if (status) {
goto exit_free;
}
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
status = PTR_ERR(data->hwmon_dev);
goto exit_remove;
}
dev_info(&client->dev, "%s: psu '%s'\n",
dev_name(data->hwmon_dev), client->name);
return 0;
exit_remove:
sysfs_remove_group(&client->dev.kobj, &ym2651y_group);
exit_free:
kfree(data);
exit:
return status;
}
static int ym2651y_remove(struct i2c_client *client)
{
struct ym2651y_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &ym2651y_group);
kfree(data);
return 0;
}
static const struct i2c_device_id ym2651y_id[] = {
{ "ym2651", YM2651 },
{ "ym2401", YM2401 },
{ "ym2851", YM2851 },
{ "ype1200am", YPEB1200AM },
{}
};
MODULE_DEVICE_TABLE(i2c, ym2651y_id);
static struct i2c_driver ym2651y_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "ym2651",
},
.probe = ym2651y_probe,
.remove = ym2651y_remove,
.id_table = ym2651y_id,
.address_list = normal_i2c,
};
static int ym2651y_read_byte(struct i2c_client *client, u8 reg)
{
return i2c_smbus_read_byte_data(client, reg);
}
static int ym2651y_read_word(struct i2c_client *client, u8 reg)
{
return i2c_smbus_read_word_data(client, reg);
}
static int ym2651y_write_word(struct i2c_client *client, u8 reg, u16 value)
{
return i2c_smbus_write_word_data(client, reg, value);
}
static int ym2651y_read_block(struct i2c_client *client, u8 command, u8 *data,
int data_len)
{
int result = i2c_smbus_read_i2c_block_data(client, command, data_len, data);
if (unlikely(result < 0))
goto abort;
if (unlikely(result != data_len)) {
result = -EIO;
goto abort;
}
result = 0;
abort:
return result;
}
struct reg_data_byte {
u8 reg;
u8 *value;
};
struct reg_data_word {
u8 reg;
u16 *value;
};
static struct ym2651y_data *ym2651y_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ym2651y_data *data = i2c_get_clientdata(client);
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
|| !data->valid) {
int i, status;
u8 command;
u8 fan_dir[5] = {0};
struct reg_data_byte regs_byte[] = { {0x19, &data->capability},
{0x20, &data->vout_mode},
{0x7d, &data->over_temp},
{0x81, &data->fan_fault},
{0x98, &data->pmbus_revision}
};
struct reg_data_word regs_word[] = { {0x79, &data->status_word},
{0x8b, &data->v_out},
{0x8c, &data->i_out},
{0x96, &data->p_out},
{0x8d, &data->temp},
{0x3b, &(data->fan_duty_cycle[0])},
{0x3c, &(data->fan_duty_cycle[1])},
{0x90, &data->fan_speed},
{0xa0, &data->mfr_vin_min},
{0xa1, &data->mfr_vin_max},
{0xa2, &data->mfr_iin_max},
{0xa3, &data->mfr_pin_max},
{0xa4, &data->mfr_vout_min},
{0xa5, &data->mfr_vout_max},
{0xa6, &data->mfr_iout_max},
{0xa7, &data->mfr_pout_max}
};
dev_dbg(&client->dev, "Starting ym2651 update\n");
/* Read byte data */
for (i = 0; i < ARRAY_SIZE(regs_byte); i++) {
status = ym2651y_read_byte(client, regs_byte[i].reg);
if (status < 0)
{
dev_dbg(&client->dev, "reg %d, err %d\n",
regs_byte[i].reg, status);
*(regs_byte[i].value) = 0;
}
else {
*(regs_byte[i].value) = status;
}
}
/* Read word data */
for (i = 0; i < ARRAY_SIZE(regs_word); i++) {
status = ym2651y_read_word(client, regs_word[i].reg);
if (status < 0)
{
dev_dbg(&client->dev, "reg %d, err %d\n",
regs_word[i].reg, status);
*(regs_word[i].value) = 0;
}
else {
*(regs_word[i].value) = status;
}
}
/* Read fan_direction */
command = 0xC3;
status = ym2651y_read_block(client, command, fan_dir, ARRAY_SIZE(fan_dir)-1);
if (status < 0) {
dev_dbg(&client->dev, "reg %d, err %d\n", command, status);
}
strncpy(data->fan_dir, fan_dir+1, ARRAY_SIZE(data->fan_dir)-1);
data->fan_dir[ARRAY_SIZE(data->fan_dir)-1] = '\0';
/* Read mfr_id */
command = 0x99;
status = ym2651y_read_block(client, command, data->mfr_id,
ARRAY_SIZE(data->mfr_id)-1);
data->mfr_id[ARRAY_SIZE(data->mfr_id)-1] = '\0';
if (status < 0)
dev_dbg(&client->dev, "reg %d, err %d\n", command, status);
/* Read mfr_model */
command = 0x9a;
status = ym2651y_read_block(client, command, data->mfr_model,
ARRAY_SIZE(data->mfr_model)-1);
data->mfr_model[ARRAY_SIZE(data->mfr_model)-1] = '\0';
if (status < 0)
dev_dbg(&client->dev, "reg %d, err %d\n", command, status);
/* Read mfr_revsion */
command = 0x9b;
status = ym2651y_read_block(client, command, data->mfr_revsion,
ARRAY_SIZE(data->mfr_revsion)-1);
data->mfr_revsion[ARRAY_SIZE(data->mfr_revsion)-1] = '\0';
if (status < 0)
dev_dbg(&client->dev, "reg %d, err %d\n", command, status);
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
module_i2c_driver(ym2651y_driver);
MODULE_AUTHOR("Brandon Chuang <brandon_chuang@accton.com.tw>");
MODULE_DESCRIPTION("3Y Power YM-2651Y driver");
MODULE_LICENSE("GPL");