/*
- 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>
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[] = {
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;
/* 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);
}
/* 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;
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
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;
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);
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;
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);
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[] = {
(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) &&
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);
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);
projects / karo-tx-linux.git / commitdiff