Commit ff312d07 authored by Riku Voipio's avatar Riku Voipio Committed by Mark M. Hoffman

hwmon: (f75375s) Allow setting up fans with platform_data

Allow initializing fans on systems where BIOS does not do that by
default.

 - define f75375s_platform_data in new file f75375s.h
 - if platform_data was provided, set fans accordingly in f75375_init()
 - split set_pwm_enable() to a sysfs callback and directly usable
   set_pwm_enable_direct()
Signed-off-by: default avatarRiku Voipio <riku.voipio@movial.fi>
Signed-off-by: default avatarMark M. Hoffman <mhoffman@lightlink.com>
parent 620c142d
......@@ -34,6 +34,7 @@
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/f75375s.h>
/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x2d, 0x2e, I2C_CLIENT_END };
......@@ -286,19 +287,14 @@ static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
return sprintf(buf, "%d\n", data->pwm_enable[nr]);
}
static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
{
int nr = to_sensor_dev_attr(attr)->index;
struct i2c_client *client = to_i2c_client(dev);
struct f75375_data *data = i2c_get_clientdata(client);
int val = simple_strtoul(buf, NULL, 10);
u8 fanmode;
if (val < 0 || val > 4)
return -EINVAL;
mutex_lock(&data->update_lock);
fanmode = f75375_read8(client, F75375_REG_FAN_TIMER);
fanmode = ~(3 << FAN_CTRL_MODE(nr));
......@@ -320,8 +316,22 @@ static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
}
f75375_write8(client, F75375_REG_FAN_TIMER, fanmode);
data->pwm_enable[nr] = val;
return 0;
}
static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int nr = to_sensor_dev_attr(attr)->index;
struct i2c_client *client = to_i2c_client(dev);
struct f75375_data *data = i2c_get_clientdata(client);
int val = simple_strtoul(buf, NULL, 10);
int err = 0;
mutex_lock(&data->update_lock);
err = set_pwm_enable_direct(client, nr, val);
mutex_unlock(&data->update_lock);
return count;
return err ? err : count;
}
static ssize_t set_pwm_mode(struct device *dev, struct device_attribute *attr,
......@@ -604,9 +614,24 @@ static int f75375_detach_client(struct i2c_client *client)
return 0;
}
static void f75375_init(struct i2c_client *client, struct f75375_data *data,
struct f75375s_platform_data *f75375s_pdata)
{
int nr;
set_pwm_enable_direct(client, 0, f75375s_pdata->pwm_enable[0]);
set_pwm_enable_direct(client, 1, f75375s_pdata->pwm_enable[1]);
for (nr = 0; nr < 2; nr++) {
data->pwm[nr] = SENSORS_LIMIT(f75375s_pdata->pwm[nr], 0, 255);
f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
data->pwm[nr]);
}
}
static int f75375_probe(struct i2c_client *client)
{
struct f75375_data *data = i2c_get_clientdata(client);
struct f75375s_platform_data *f75375s_pdata = client->dev.platform_data;
int err;
if (!i2c_check_functionality(client->adapter,
......@@ -637,6 +662,9 @@ static int f75375_probe(struct i2c_client *client)
goto exit_remove;
}
if (f75375s_pdata != NULL)
f75375_init(client, data, f75375s_pdata);
return 0;
exit_remove:
......
/*
* f75375s.h - platform data structure for f75375s sensor
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2007, Riku Voipio <riku.voipio@iki.fi>
*/
#ifndef __LINUX_F75375S_H
#define __LINUX_F75375S_H
/* We want to set fans spinning on systems where there is no
* BIOS to do that for us */
struct f75375s_platform_data {
u8 pwm[2];
u8 pwm_enable[2];
};
#endif /* __LINUX_F75375S_H */
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