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sonic-buildimage/platform/innovium/sonic-platform-modules-cameo/esc601-32q/modules/zrh2800k2.c

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[201911] [Innovium] Add new platforms and config updates (#7545) Update Innovium configs + Add new platforms supporting Innovium chips
2021-05-17 14:30:20 -05:00
#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 DEBUG_MSG
#ifdef DEBUG_MSG
#define debug_print(s) printk s
#else
#define debug_print(s)
#endif
//#define SYMBOL_FOR_LM_SENSOR
struct zrh2800k2_data {
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* !=0 if registers are valid */
unsigned long last_updated; /* In jiffies */
u64 last_energy_value_EIN;
u64 last_smaple_count_EIN;
u64 last_energy_value_EOUT;
u64 last_smaple_count_EOUT;
};
typedef enum _access_type_{
READ_BYTE,
READ_WORD,
READ_BLOCK
}ACCESS_TYPE;
typedef enum _value_format_{
FORMAT_NORMAL,
FORMAT_DIRECT,
FORMAT_LINEAR
}VALUE_FORMAT;
typedef enum _zrh2800k2_regs_ {
REG_CAPABILITY = 0x19,
REG_QUERY = 0X1A,
REG_VOUT_MODE = 0x20,
REG_COEFFICIENTS = 0X30,
REG_FAN_CONFIG_1_2 = 0x3A,
REG_STATUS_WORD = 0x79,
REG_STATUS_VOUT = 0x7A,
REG_STATUS_IOUT = 0x7B,
REG_STATUS_INPUT = 0x7C,
REG_STATUS_TEMPERATURE = 0x7D,
REG_STATUS_FANS_1_2 = 0x81,
REG_READ_EIN = 0x86, /* direct data format */
REG_READ_EOUT = 0x87, /* direct data format */
REG_READ_VIN = 0x88,
REG_READ_IIN = 0x89,
REG_READ_VOUT = 0x8B, /* linear data format */
REG_READ_IOUT = 0x8C, /* linear data format */
REG_READ_TEMPERATURE1 = 0x8D, /* linear data format */
REG_READ_FAN_SPEED_1 = 0x90, /* linear data format */
REG_READ_POUT = 0x96, /* linear data format */
REG_READ_PIN = 0x97, /* linear data format */
REG_READ_PMBUS_REVISION = 0x98,
REG_READ_MFR_ID = 0x99, /* ZIPPY 5 BYTES */
REG_READ_MFR_MODEL = 0x9A,
REG_READ_MFR_VIN_MAX = 0xA4, /* linear data format */
REG_READ_MFR_IOUT_MAX = 0xA6 /* lineat data format */
}ZRH2800K2_REGS;
enum zrh2800k2_sysfs_attributes {
PSU_CAPABILITY, /* 0 */
PSU_QUERY,
PSU_VOUT_MODE,
PSU_COEFFICIENTS,
PSU_FAN_CONFIG_1_2,
PSU_STATUS_WORD, /* 5 */
PSU_STATUS_VOUT,
PSU_STATUS_IOUT,
PSU_STATUS_INPUT,
PSU_STATUS_TEMPERATURE,
PSU_STATUS_FANS_1_2, /* 10 */
PSU_EIN,
PSU_EOUT,
PSU_VIN,
PSU_IIN,
PSU_VOUT, /* 15 */
PSU_IOUT,
PSU_TEMPERATURE_1,
PSU_FAN_SPEED_1,
PSU_POUT,
PSU_PIN, /* 20 */
PSU_PMBUS_REVISION,
PSU_MFR_ID,
PSU_MFR_MODEL,
PSU_MFR_VIN_MAX,
PSU_MFR_IOUT_MAX
};
struct _OPERATION_SET_ {
ZRH2800K2_REGS reg;
ACCESS_TYPE type;
u8 data_size; // unit: byte, only used for block read
};
/* the index of operations are mapping to the zrh2800k2_sysfs_attributes */
static struct _OPERATION_SET_ operation_set[] = {
{ REG_CAPABILITY, READ_BYTE, 1 }, // 0
{ REG_QUERY, READ_BYTE, 1}, // 1
{ REG_VOUT_MODE, READ_BYTE, 1 }, // 2
{ REG_COEFFICIENTS, READ_BLOCK, 5 }, // 3
{ REG_FAN_CONFIG_1_2 , READ_BYTE, 1 }, // 4
{ REG_STATUS_WORD, READ_WORD, 2 }, // 5
{ REG_STATUS_VOUT, READ_BYTE, 1 }, // 6
{ REG_STATUS_IOUT, READ_BYTE, 1 }, // 7
{ REG_STATUS_INPUT, READ_BYTE, 1 }, // 8
{ REG_STATUS_TEMPERATURE, READ_BYTE, 1 }, //9
{ REG_STATUS_FANS_1_2, READ_BYTE, 1 }, // 10
{ REG_READ_EIN, READ_BLOCK, 6 }, // 11
{ REG_READ_EOUT, READ_BLOCK, 6 }, // 12
{ REG_READ_VIN, READ_WORD, 2 }, // 13
{ REG_READ_IIN, READ_WORD, 2 }, // 14
{ REG_READ_VOUT, READ_WORD, 2 }, // 15
{ REG_READ_IOUT, READ_WORD, 2 }, // 16
{ REG_READ_TEMPERATURE1, READ_WORD, 2 }, // 17
{ REG_READ_FAN_SPEED_1, READ_WORD, 2 }, // 18
{ REG_READ_POUT, READ_WORD, 2 }, // 19
{ REG_READ_PIN, READ_WORD, 2 }, // 20
{ REG_READ_PMBUS_REVISION, READ_BYTE, 1 }, //21
{ REG_READ_MFR_ID, READ_BLOCK, 5 }, // 22
{ REG_READ_MFR_MODEL, READ_BLOCK, 9 }, // 23
{ REG_READ_MFR_VIN_MAX, READ_WORD, 2 }, // 24
{ REG_READ_MFR_IOUT_MAX, READ_WORD, 2 } // 25
};
static int zrh2800k2_remove(struct i2c_client *client);
static int zrh2800k2_probe(struct i2c_client *client, const struct i2c_device_id *dev_id);
static ssize_t show_value(struct device *dev, struct device_attribute *da, char *buf);
static ssize_t show_capability(struct device *dev, struct device_attribute *da, char *buf);
static ssize_t psu_pm_query(struct device *dev, struct device_attribute *da, char *buf);
static ssize_t psu_coefficient(struct device *dev, struct device_attribute *da, char *buf);
static ssize_t set_fan_config(struct device *dev, struct device_attribute *da, const char *buf, size_t count);
/* Addresses scanned */
static const unsigned short normal_i2c[] = { 0x58, 0x59, I2C_CLIENT_END };
/* sysfs attributes for hwmon */
static SENSOR_DEVICE_ATTR(psu_query, S_IRUGO, psu_pm_query, NULL, PSU_QUERY);
static SENSOR_DEVICE_ATTR(psu_coeff, S_IRUGO, psu_coefficient,NULL, PSU_COEFFICIENTS);
static SENSOR_DEVICE_ATTR(psu_fan_config_1_2, S_IRUGO|S_IWUSR, show_value, set_fan_config, PSU_FAN_CONFIG_1_2);
static SENSOR_DEVICE_ATTR(psu_capability, S_IRUGO, show_capability, NULL, PSU_CAPABILITY);
static SENSOR_DEVICE_ATTR(psu_vout_mode, S_IRUGO, show_value, NULL, PSU_VOUT_MODE);
static SENSOR_DEVICE_ATTR(psu_status_word, S_IRUGO, show_value, NULL, PSU_STATUS_WORD);
static SENSOR_DEVICE_ATTR(psu_status_vout, S_IRUGO, show_value, NULL, PSU_STATUS_VOUT);
static SENSOR_DEVICE_ATTR(psu_status_iout, S_IRUGO, show_value, NULL, PSU_STATUS_IOUT);
static SENSOR_DEVICE_ATTR(psu_status_input, S_IRUGO, show_value, NULL, PSU_STATUS_INPUT);
static SENSOR_DEVICE_ATTR(psu_status_temp, S_IRUGO, show_value, NULL, PSU_STATUS_TEMPERATURE);
static SENSOR_DEVICE_ATTR(psu_status_fan_1_2, S_IRUGO, show_value, NULL, PSU_STATUS_FANS_1_2);
static SENSOR_DEVICE_ATTR(psu_ein, S_IRUGO, show_value, NULL, PSU_EIN);
static SENSOR_DEVICE_ATTR(psu_eout, S_IRUGO, show_value, NULL, PSU_EOUT);
static SENSOR_DEVICE_ATTR(psu_pmbus_rev,S_IRUGO, show_value, NULL, PSU_PMBUS_REVISION);
static SENSOR_DEVICE_ATTR(psu_mfr_id, S_IRUGO, show_value, NULL, PSU_MFR_ID);
static SENSOR_DEVICE_ATTR(psu_mfr_model,S_IRUGO, show_value, NULL, PSU_MFR_MODEL);
static SENSOR_DEVICE_ATTR(psu_vin, S_IRUGO, show_value, NULL, PSU_VIN);
static SENSOR_DEVICE_ATTR(psu_vout, S_IRUGO, show_value, NULL, PSU_VOUT);
static SENSOR_DEVICE_ATTR(psu_iin, S_IRUGO, show_value, NULL, PSU_IIN);
static SENSOR_DEVICE_ATTR(psu_iout, S_IRUGO, show_value, NULL, PSU_IOUT);
static SENSOR_DEVICE_ATTR(psu_iout_max, S_IRUGO, show_value, NULL, PSU_MFR_IOUT_MAX);
static SENSOR_DEVICE_ATTR(psu_pin, S_IRUGO, show_value, NULL, PSU_PIN);
static SENSOR_DEVICE_ATTR(psu_pout, S_IRUGO, show_value, NULL, PSU_POUT);
static SENSOR_DEVICE_ATTR(psu_temp_1, S_IRUGO, show_value, NULL, PSU_TEMPERATURE_1);
static SENSOR_DEVICE_ATTR(psu_fan_speed_1, S_IRUGO, show_value, NULL, PSU_FAN_SPEED_1);
/* section for lm-sensor */
#ifdef SYMBOL_FOR_LM_SENSOR
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_value, NULL, PSU_VIN);
// static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO, show_value, NULL, PSU_MFR_VIN_MAX); -> not support
static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_value, NULL, PSU_VOUT);
static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, show_value, NULL, PSU_IIN);
static SENSOR_DEVICE_ATTR(curr2_input, S_IRUGO, show_value, NULL, PSU_IOUT);
static SENSOR_DEVICE_ATTR(curr2_max, S_IRUGO, show_value, NULL, PSU_MFR_IOUT_MAX);
static SENSOR_DEVICE_ATTR(power1_input, S_IRUGO, show_value, NULL, PSU_PIN);
static SENSOR_DEVICE_ATTR(power2_input, S_IRUGO, show_value, NULL, PSU_POUT);
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_value, NULL, PSU_TEMPERATURE_1);
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_value, NULL, PSU_FAN_SPEED_1);
#endif
static struct attribute *zrh2800k2_attributes[] = {
&sensor_dev_attr_psu_query.dev_attr.attr,
&sensor_dev_attr_psu_coeff.dev_attr.attr,
&sensor_dev_attr_psu_fan_config_1_2.dev_attr.attr,
&sensor_dev_attr_psu_capability.dev_attr.attr,
&sensor_dev_attr_psu_vout_mode.dev_attr.attr,
&sensor_dev_attr_psu_status_word.dev_attr.attr,
&sensor_dev_attr_psu_status_vout.dev_attr.attr,
&sensor_dev_attr_psu_status_iout.dev_attr.attr,
&sensor_dev_attr_psu_status_input.dev_attr.attr,
&sensor_dev_attr_psu_status_temp.dev_attr.attr,
&sensor_dev_attr_psu_status_fan_1_2.dev_attr.attr,
&sensor_dev_attr_psu_ein.dev_attr.attr,
&sensor_dev_attr_psu_eout.dev_attr.attr,
&sensor_dev_attr_psu_pmbus_rev.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_vin.dev_attr.attr,
&sensor_dev_attr_psu_vout.dev_attr.attr,
&sensor_dev_attr_psu_iin.dev_attr.attr,
&sensor_dev_attr_psu_iout.dev_attr.attr,
&sensor_dev_attr_psu_iout_max.dev_attr.attr,
&sensor_dev_attr_psu_pin.dev_attr.attr,
&sensor_dev_attr_psu_pout.dev_attr.attr,
&sensor_dev_attr_psu_temp_1.dev_attr.attr,
&sensor_dev_attr_psu_fan_speed_1.dev_attr.attr,
#ifdef SYMBOL_FOR_LM_SENSOR
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in2_input.dev_attr.attr,
&sensor_dev_attr_curr1_input.dev_attr.attr,
&sensor_dev_attr_curr2_input.dev_attr.attr,
&sensor_dev_attr_curr2_max.dev_attr.attr,
&sensor_dev_attr_power1_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,
#endif
NULL
};
static const struct attribute_group zrh2800k2_group = {
.attrs = zrh2800k2_attributes,
};
static u32 easy_pow(u32 num, u32 power)
{
if(power == 0)
return 1;
power--;
while(power) {
num = num*num;
power--;
}
return num;
}
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 int zrh2800k2_read(struct device *dev, ACCESS_TYPE rtype , ZRH2800K2_REGS reg)
{
struct i2c_client *client = to_i2c_client(dev);
struct zrh2800k2_data *data = i2c_get_clientdata(client);
int result;
mutex_lock(&data->update_lock);
if (rtype == READ_BYTE) {
result = i2c_smbus_read_byte_data(client, (u8)reg);
}else if(rtype == READ_WORD) {
result = i2c_smbus_read_word_data(client, (u8)reg);
}else{
printk(KERN_ALERT "ERROR: unknown read type");
}
mutex_unlock(&data->update_lock);
return result;
}
static int zrh2800k2_read_block(struct device *dev, ZRH2800K2_REGS reg, u8* block_data, int block_data_len)
{
struct i2c_client *client = to_i2c_client(dev);
struct zrh2800k2_data *data = i2c_get_clientdata(client);
int result;
mutex_lock(&data->update_lock);
result = i2c_smbus_read_i2c_block_data(client, (u8)reg, block_data_len, block_data);
mutex_unlock(&data->update_lock);
if (unlikely(result < 0)) {
goto read_block_exit;
}
if (result != block_data_len) {
result = -EIO;
goto read_block_exit;
}
result = 0;
read_block_exit:
return result;
}
static int get_coefficient(struct device* dev, u16* m, u16* b, u8* R)
{
u8 buf_block[6] = {0};
int ret = zrh2800k2_read_block(dev, REG_COEFFICIENTS, buf_block, 6);
// [ byte_count,m-l,m-h,b-l,b-h,R ]
if (ret < 0) {
printk(KERN_ALERT "get coefficient fail(%d)\n", ret);
return -1;
}
*R = buf_block[5];
*m = buf_block[2];
*m = ((*m)<<8 )+ buf_block[1];
*b = buf_block[4];
*b = ((*b)<<8 )+ buf_block[3];
debug_print((KERN_DEBUG " coefficient read : 0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x \n", buf_block[0], buf_block[1], buf_block[2],
buf_block[3], buf_block[4], buf_block[5]));
debug_print((KERN_DEBUG " coefficient r m b: 0x%x, 0x%x, 0x%x \n", *R, *m, *b));
return 0;
}
/* read a byte or word value and show*/
static ssize_t show_value(struct device *dev, struct device_attribute *da, char *buf)
{
u16 u16_val = 0;
int exponent = 0, mantissa = 0;
int multiplier = 1000; // lm-sensor uint: mV, mA, mC
u8 buf_block[11] = {0}; // used to save enough data from read block.
char *ascii = NULL;
int ret = 0;
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
debug_print((KERN_DEBUG "show value op[%d]: reg %d\n", attr->index,
operation_set[attr->index].reg ));
switch (operation_set[attr->index].type) {
case READ_BYTE:
case READ_WORD:
ret = zrh2800k2_read(dev, operation_set[attr->index].type , operation_set[attr->index].reg);
break;
case READ_BLOCK:
ret = zrh2800k2_read_block(dev, operation_set[attr->index].reg, buf_block, operation_set[attr->index].data_size + 1);
break;
default:
printk(KERN_ALERT "unknown access type\n");
return 0;
}
if (ret < 0) {
printk(KERN_ALERT "ERROR: Read fail ret(%d)\n", ret);
return 0;
}
/* arrange return buf */
switch (attr->index) {
/* case directly return */
case PSU_STATUS_WORD:
case PSU_VOUT_MODE:
return sprintf(buf, "%d\n", ret);
case PSU_STATUS_VOUT:
return sprintf(buf,
"VOUT Over Voltage Fault : %d \nVOUT Over Voltage Warning : %d \nVOUT Under Voltage Warning : %d \nVOUT Under Voltage Fault : %d \n",
(ret>>7)&0x1,(ret>>6)&0x1,
(ret>>5)&0x1,(ret>>4)&0x1);
case PSU_STATUS_IOUT:
return sprintf(buf,
"IOUT Overcurrent Fault : %d \nIOUT Overcurrent Warnning : %d \nPOUT Overcurrent Fault : %d \nPOUT Overcurrent Warnning : %d \n",
(ret>>7)&0x1, (ret>>5)&0x1,
(ret>>1)&0x1, ret&0x1);
case PSU_STATUS_INPUT:
return sprintf(buf,
"PIN Overpower Warning : %d \n", (ret&0x1));
case PSU_STATUS_TEMPERATURE:
return sprintf(buf,
"Overtemperature Fault : %d \nOvertemperature Warning : %d \nUbdertemperature Warning : %d \nUbdertemperature Fault : %d \n",
(ret>>7)&0x1,(ret>>6)&0x1,
(ret>>5)&0x1,(ret>>4)&0x1);
case PSU_STATUS_FANS_1_2:
return sprintf(buf,
"Fan Fault : %d \nFan Warning : %d \n",
(ret>>7)&0x1, (ret>>5)&0x1);
case PSU_FAN_CONFIG_1_2:
debug_print((KERN_DEBUG "PSU_FAN_CONFIG_1_2: 0x%X\n",ret));
return sprintf(buf,
"Fan is installed in Position1: %s\n" \
"Fan1 speed Unit: %s\n" \
"Fan1 Tachometer Pulses Per Revolution 0x%x\n" \
"Fan install in Position2: %s\n" \
"Fan2 speed Unit: %s\n" \
"Fan2 Tachometer Pulses Per Revolution 0x%x\n",
(ret>>7)?"YES":"NONE",
((ret>>6)&0x1)?"RPM":"Duty Cycle",
(ret>>4)&0x3,
(ret>>3&0x01)?"YES":"NONE",
((ret>>2)&0x1)?"RPM":"Duty Cycle",
ret&0x3);
/* special case for READ_VOUT */
case PSU_VOUT:
/* save mantissa */
mantissa = ret;
debug_print((KERN_DEBUG "PSU_VOUT: mantissa 0x%X\n",mantissa));
/* read the exponent from REG_READ_VMODE */
ret = zrh2800k2_read(dev, READ_BYTE , REG_VOUT_MODE);
if (ret < 0) {
printk(KERN_ALERT "Error: Read fail ret(%d)\n", ret);
return 0;
}
exponent = two_complement_to_int(ret & 0x1f, 5, 0x1f);
debug_print((KERN_DEBUG "PSU_VOUT: VOUT_MODE 0x%X\n",ret));
debug_print((KERN_DEBUG "PSU_VOUT: exponent 0x%X\n",exponent));
return (exponent >= 0) ? sprintf(buf, "%d\n", (mantissa << exponent)*multiplier ) : \
sprintf(buf, "%d\n", (mantissa*multiplier / (1 << -exponent)));
/* word data with linear format */
case PSU_POUT:
case PSU_PIN:
multiplier = 1000000; // lm-sensor unit: uW
case PSU_VIN:
case PSU_IIN:
case PSU_IOUT:
case PSU_TEMPERATURE_1:
case PSU_FAN_SPEED_1:
case PSU_MFR_VIN_MAX:
case PSU_MFR_IOUT_MAX:
if (attr->index == PSU_FAN_SPEED_1)
multiplier = 1;
u16_val = ret;
exponent = two_complement_to_int(u16_val >> 11, 5, 0x1f);
mantissa = two_complement_to_int(u16_val & 0x7ff, 11, 0x7ff);
debug_print((KERN_DEBUG "REG(%d): ret 0x%X, u16_val: 0x%x\n", attr->index, ret, u16_val));
debug_print((KERN_DEBUG "REG(%d): exponent 0x%X\n", attr->index, exponent));
debug_print((KERN_DEBUG "REG(%d): mantissa 0x%X\n", attr->index, mantissa));
return (exponent >= 0) ? sprintf(buf, "%d\n", (mantissa << exponent)*multiplier ) : \
sprintf(buf, "%d\n", (mantissa*multiplier / (1 << -exponent)));
case PSU_EIN:
case PSU_EOUT: {
u16 m,b;
u8 R;
u64 ev = buf_block[2];
u8 rc = buf_block[3];
u64 sc = buf_block[6];
u32 sc_mid = buf_block[5];
u64 average_value = 0;
struct i2c_client *client = to_i2c_client(dev);
struct zrh2800k2_data *data = i2c_get_clientdata(client);
if (get_coefficient(dev, &m, &b, &R) < 0) {
return sprintf(buf, "ERROR, fail to get coefficient\n");
}
// [ bytecount, energy_count-l, energy_count-h, ROLLOVER_count ,
// sample_count-l, sample_count-mid, sample_count-h ]
// maximum_direct_format_value = (m*32767+b)*(10)^R
// energy_value = Rollover_count * maximum_direct_format_value + energy_count
debug_print((KERN_DEBUG "[ec-l,ec-h,rc,sc-l,sc-,sc-h]: [0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x]\n", buf_block[0], buf_block[1], buf_block[2],
buf_block[3], buf_block[4], buf_block[5], buf_block[6]));
ev = rc * (m*32767+b)*easy_pow(10,R) + ((ev<<8) + buf_block[1]);
sc = (sc<<16) + (sc_mid<<8) + buf_block[4];
if(attr->index == PSU_EIN) {
average_value = ((ev - data->last_energy_value_EIN)*1000) / (sc - data->last_smaple_count_EIN);
data->last_energy_value_EIN = ev;
data->last_smaple_count_EIN = sc;
} else {
average_value = ((ev - data->last_energy_value_EOUT)*1000) / (sc - data->last_smaple_count_EOUT);
data->last_energy_value_EOUT = ev;
data->last_smaple_count_EOUT = sc;
}
return sprintf(buf, "%llu.%llu\n", average_value/1000, average_value%1000);
}
case PSU_MFR_ID:
case PSU_MFR_MODEL:
debug_print((KERN_DEBUG "[0x%x,0x%x,0x%x,0x%x,0x%x,0x%x]\n", buf_block[0], buf_block[1], buf_block[2],
buf_block[3], buf_block[4], buf_block[5]));
ascii = &buf_block[1];
return sprintf(buf, "%s\n", ascii);
case PSU_PMBUS_REVISION:
return sprintf(buf, "Part1 Revision: 1.%d, Part2 Revision: 1.%d\n",
(ret>>5), (ret&0x7) );
/* not implement yet */
default:
return sprintf(buf, "not implement yet\n");
}
/* should not goto here */
return sprintf(buf, "unknown case\n");
}
static ssize_t show_capability(struct device *dev, struct device_attribute *da, char *buf)
{
/* todo */
return sprintf(buf, "not implement yet\n");
}
static ssize_t psu_pm_query(struct device *dev, struct device_attribute *da, char *buf)
{
/* todo */
return sprintf(buf, "not implement yet\n");
}
static ssize_t psu_coefficient(struct device *dev, struct device_attribute *da, char *buf)
{
/* todo */
return sprintf(buf, "not implement yet\n");
}
static ssize_t set_fan_config(struct device *dev, struct device_attribute *da, const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct zrh2800k2_data *data = i2c_get_clientdata(client);
int result;
u8 input_val;
mutex_lock(&data->update_lock);
input_val = simple_strtol(buf, NULL, 10);
result = i2c_smbus_write_byte_data(client, REG_FAN_CONFIG_1_2, input_val);
mutex_unlock(&data->update_lock);
if (result < 0) {
printk(KERN_ALERT "ERROR: SET_FAN_CONFIG %s fail\n", buf);
} else {
debug_print((KERN_DEBUG "SET_FAN_CONFIG %s success\n", buf));
}
return count;
}
static const struct i2c_device_id zrh2800k2_id[] = {
{ "zrh2800k2", 0 },
{}
};
static struct i2c_driver zrh2800k2_driver = {
.class = I2C_CLASS_HWMON,
.driver =
{
.name = "ZRH2800K2",
},
.probe = zrh2800k2_probe,
.remove = zrh2800k2_remove,
.id_table = zrh2800k2_id,
.address_list = normal_i2c,
};
static int zrh2800k2_remove(struct i2c_client *client)
{
struct zrh2800k2_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &zrh2800k2_group);
kfree(data);
return 0;
}
static int zrh2800k2_probe(struct i2c_client *client,
const struct i2c_device_id *dev_id)
{
struct zrh2800k2_data *data;
int status;
if(!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA)) {
status = -EIO;
goto exit;
}
data = kzalloc(sizeof(struct zrh2800k2_data), GFP_KERNEL);
if (!data) {
status = -ENOMEM;
goto exit;
}
i2c_set_clientdata(client, data);
mutex_init(&data->update_lock);
dev_info(&client->dev, "chip found\n");
/* Register sysfs hooks */
status = sysfs_create_group(&client->dev.kobj, &zrh2800k2_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, &zrh2800k2_group);
exit_free:
kfree(data);
exit:
return status;
}
module_i2c_driver(zrh2800k2_driver);
MODULE_AUTHOR("Cameo Inc.");
MODULE_DESCRIPTION("Power Supply zrh-2800k2 driver");
MODULE_LICENSE("GPL");
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