Skip to content

Commit

Permalink
---
Browse files Browse the repository at this point in the history 
yaml
---
r: 292154
b: refs/heads/master
c: f24d548
h: refs/heads/master
v: v3
  • Loading branch information
Guenter Roeck authored and Guenter Roeck committed Mar 19, 2012
1 parent 81c0613 commit 3fba951
Show file tree
Hide file tree
Showing 2 changed files with 94 additions and 66 deletions.
2 changes: 1 addition & 1 deletion [refs]
View file
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 724cc3316e6e1060f727958b4c327001c0bbd62c
refs/heads/master: f24d548bf2c4da3fd2cc4d0ffec108216b705850
158 changes: 93 additions & 65 deletions trunk/drivers/hwmon/atxp1.c
View file
Original file line number Diff line number Diff line change
@@ -1,22 +1,22 @@
/*
atxp1.c - kernel module for setting CPU VID and general purpose
I/Os using the Attansic ATXP1 chip.
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.
*/
* atxp1.c - kernel module for setting CPU VID and general purpose
* I/Os using the Attansic ATXP1 chip.
*
* 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/kernel.h>
#include <linux/init.h>
Expand Down Expand Up @@ -48,7 +48,7 @@ static const unsigned short normal_i2c[] = { 0x37, 0x4e, I2C_CLIENT_END };
static int atxp1_probe(struct i2c_client *client,
const struct i2c_device_id *id);
static int atxp1_remove(struct i2c_client *client);
static struct atxp1_data * atxp1_update_device(struct device *dev);
static struct atxp1_data *atxp1_update_device(struct device *dev);
static int atxp1_detect(struct i2c_client *client, struct i2c_board_info *info);

static const struct i2c_device_id atxp1_id[] = {
Expand Down Expand Up @@ -83,7 +83,7 @@ struct atxp1_data {
u8 vrm; /* Detected CPU VRM */
};

static struct atxp1_data * atxp1_update_device(struct device *dev)
static struct atxp1_data *atxp1_update_device(struct device *dev)
{
struct i2c_client *client;
struct atxp1_data *data;
Expand All @@ -97,7 +97,8 @@ static struct atxp1_data * atxp1_update_device(struct device *dev)

/* Update local register data */
data->reg.vid = i2c_smbus_read_byte_data(client, ATXP1_VID);
data->reg.cpu_vid = i2c_smbus_read_byte_data(client, ATXP1_CVID);
data->reg.cpu_vid = i2c_smbus_read_byte_data(client,
ATXP1_CVID);
data->reg.gpio1 = i2c_smbus_read_byte_data(client, ATXP1_GPIO1);
data->reg.gpio2 = i2c_smbus_read_byte_data(client, ATXP1_GPIO2);

Expand All @@ -110,29 +111,37 @@ static struct atxp1_data * atxp1_update_device(struct device *dev)
}

/* sys file functions for cpu0_vid */
static ssize_t atxp1_showvcore(struct device *dev, struct device_attribute *attr, char *buf)
static ssize_t atxp1_showvcore(struct device *dev,
struct device_attribute *attr, char *buf)
{
int size;
struct atxp1_data *data;

data = atxp1_update_device(dev);

size = sprintf(buf, "%d\n", vid_from_reg(data->reg.vid & ATXP1_VIDMASK, data->vrm));
size = sprintf(buf, "%d\n", vid_from_reg(data->reg.vid & ATXP1_VIDMASK,
data->vrm));

return size;
}

static ssize_t atxp1_storevcore(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
static ssize_t atxp1_storevcore(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct atxp1_data *data;
struct i2c_client *client;
int vid, cvid;
unsigned int vcore;
unsigned long vcore;
int err;

client = to_i2c_client(dev);
data = atxp1_update_device(dev);

vcore = simple_strtoul(buf, NULL, 10);
err = kstrtoul(buf, 10, &vcore);
if (err)
return err;

vcore /= 25;
vcore *= 25;

Expand All @@ -144,7 +153,10 @@ static ssize_t atxp1_storevcore(struct device *dev, struct device_attribute *att
return -1;
}

/* If output enabled, use control register value. Otherwise original CPU VID */
/*
* If output enabled, use control register value.
* Otherwise original CPU VID
*/
if (data->reg.vid & ATXP1_VIDENA)
cvid = data->reg.vid & ATXP1_VIDMASK;
else
Expand All @@ -154,32 +166,34 @@ static ssize_t atxp1_storevcore(struct device *dev, struct device_attribute *att
if (vid == cvid)
return count;

dev_dbg(dev, "Setting VCore to %d mV (0x%02x)\n", vcore, vid);
dev_dbg(dev, "Setting VCore to %d mV (0x%02x)\n", (int)vcore, vid);

/* Write every 25 mV step to increase stability */
if (cvid > vid) {
for (; cvid >= vid; cvid--) {
i2c_smbus_write_byte_data(client, ATXP1_VID, cvid | ATXP1_VIDENA);
}
}
else {
for (; cvid <= vid; cvid++) {
i2c_smbus_write_byte_data(client, ATXP1_VID, cvid | ATXP1_VIDENA);
}
for (; cvid >= vid; cvid--)
i2c_smbus_write_byte_data(client,
ATXP1_VID, cvid | ATXP1_VIDENA);
} else {
for (; cvid <= vid; cvid++)
i2c_smbus_write_byte_data(client,
ATXP1_VID, cvid | ATXP1_VIDENA);
}

data->valid = 0;

return count;
}

/* CPU core reference voltage
unit: millivolt
*/
static DEVICE_ATTR(cpu0_vid, S_IRUGO | S_IWUSR, atxp1_showvcore, atxp1_storevcore);
/*
* CPU core reference voltage
* unit: millivolt
*/
static DEVICE_ATTR(cpu0_vid, S_IRUGO | S_IWUSR, atxp1_showvcore,
atxp1_storevcore);

/* sys file functions for GPIO1 */
static ssize_t atxp1_showgpio1(struct device *dev, struct device_attribute *attr, char *buf)
static ssize_t atxp1_showgpio1(struct device *dev,
struct device_attribute *attr, char *buf)
{
int size;
struct atxp1_data *data;
Expand All @@ -191,21 +205,26 @@ static ssize_t atxp1_showgpio1(struct device *dev, struct device_attribute *attr
return size;
}

static ssize_t atxp1_storegpio1(struct device *dev, struct device_attribute *attr, const char*buf, size_t count)
static ssize_t atxp1_storegpio1(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct atxp1_data *data;
struct i2c_client *client;
unsigned int value;
unsigned long value;
int err;

client = to_i2c_client(dev);
data = atxp1_update_device(dev);

value = simple_strtoul(buf, NULL, 16);
err = kstrtoul(buf, 16, &value);
if (err)
return err;

value &= ATXP1_GPIO1MASK;

if (value != (data->reg.gpio1 & ATXP1_GPIO1MASK)) {
dev_info(dev, "Writing 0x%x to GPIO1.\n", value);
dev_info(dev, "Writing 0x%x to GPIO1.\n", (unsigned int)value);

i2c_smbus_write_byte_data(client, ATXP1_GPIO1, value);

Expand All @@ -215,13 +234,15 @@ static ssize_t atxp1_storegpio1(struct device *dev, struct device_attribute *att
return count;
}

/* GPIO1 data register
unit: Four bit as hex (e.g. 0x0f)
*/
/*
* GPIO1 data register
* unit: Four bit as hex (e.g. 0x0f)
*/
static DEVICE_ATTR(gpio1, S_IRUGO | S_IWUSR, atxp1_showgpio1, atxp1_storegpio1);

/* sys file functions for GPIO2 */
static ssize_t atxp1_showgpio2(struct device *dev, struct device_attribute *attr, char *buf)
static ssize_t atxp1_showgpio2(struct device *dev,
struct device_attribute *attr, char *buf)
{
int size;
struct atxp1_data *data;
Expand All @@ -233,19 +254,22 @@ static ssize_t atxp1_showgpio2(struct device *dev, struct device_attribute *attr
return size;
}

static ssize_t atxp1_storegpio2(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
static ssize_t atxp1_storegpio2(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct atxp1_data *data;
struct i2c_client *client;
unsigned int value;

client = to_i2c_client(dev);
data = atxp1_update_device(dev);
struct atxp1_data *data = atxp1_update_device(dev);
struct i2c_client *client = to_i2c_client(dev);
unsigned long value;
int err;

value = simple_strtoul(buf, NULL, 16) & 0xff;
err = kstrtoul(buf, 16, &value);
if (err)
return err;
value &= 0xff;

if (value != data->reg.gpio2) {
dev_info(dev, "Writing 0x%x to GPIO1.\n", value);
dev_info(dev, "Writing 0x%x to GPIO1.\n", (unsigned int)value);

i2c_smbus_write_byte_data(client, ATXP1_GPIO2, value);

Expand All @@ -255,9 +279,10 @@ static ssize_t atxp1_storegpio2(struct device *dev, struct device_attribute *att
return count;
}

/* GPIO2 data register
unit: Eight bit as hex (e.g. 0xff)
*/
/*
* GPIO2 data register
* unit: Eight bit as hex (e.g. 0xff)
*/
static DEVICE_ATTR(gpio2, S_IRUGO | S_IWUSR, atxp1_showgpio2, atxp1_storegpio2);

static struct attribute *atxp1_attributes[] = {
Expand Down Expand Up @@ -290,8 +315,10 @@ static int atxp1_detect(struct i2c_client *new_client,
(i2c_smbus_read_byte_data(new_client, 0xff) == 0)))
return -ENODEV;

/* No vendor ID, now checking if registers 0x10,0x11 (non-existent)
* showing the same as register 0x00 */
/*
* No vendor ID, now checking if registers 0x10,0x11 (non-existent)
* showing the same as register 0x00
*/
temp = i2c_smbus_read_byte_data(new_client, 0x00);

if (!((i2c_smbus_read_byte_data(new_client, 0x10) == temp) &&
Expand Down Expand Up @@ -333,7 +360,8 @@ static int atxp1_probe(struct i2c_client *new_client,
mutex_init(&data->update_lock);

/* Register sysfs hooks */
if ((err = sysfs_create_group(&new_client->dev.kobj, &atxp1_group)))
err = sysfs_create_group(&new_client->dev.kobj, &atxp1_group);
if (err)
goto exit_free;

data->hwmon_dev = hwmon_device_register(&new_client->dev);
Expand All @@ -357,7 +385,7 @@ static int atxp1_probe(struct i2c_client *new_client,

static int atxp1_remove(struct i2c_client *client)
{
struct atxp1_data * data = i2c_get_clientdata(client);
struct atxp1_data *data = i2c_get_clientdata(client);

hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &atxp1_group);
Expand Down

0 comments on commit 3fba951

Please sign in to comment.