diff options
Diffstat (limited to 'drivers/hwmon/atxp1.c')
| -rw-r--r-- | drivers/hwmon/atxp1.c | 158 |
1 files changed, 93 insertions, 65 deletions
diff --git a/drivers/hwmon/atxp1.c b/drivers/hwmon/atxp1.c index e69036a51253..58af6aa93530 100644 --- a/drivers/hwmon/atxp1.c +++ b/drivers/hwmon/atxp1.c @@ -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> @@ -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[] = { @@ -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; @@ -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); @@ -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; @@ -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 @@ -154,18 +166,17 @@ 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; @@ -173,13 +184,16 @@ static ssize_t atxp1_storevcore(struct device *dev, struct device_attribute *att 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; @@ -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); @@ -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; @@ -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); @@ -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[] = { @@ -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) && @@ -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); @@ -357,7 +385,7 @@ exit: 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); |