hwmon/via686a: Convert to a platform driver
Convert the via686a driver from the nonsensical i2c-isa hack to a regular platform driver. Signed-off-by: Jean Delvare <khali@linux-fr.org>hifive-unleashed-5.1
Jean Delvare
Mark M. Hoffman
parent
58fe0809cc
commit
2ec342e684
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@ -497,8 +497,7 @@ config SENSORS_SMSC47B397
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config SENSORS_VIA686A
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tristate "VIA686A"
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depends on I2C && PCI
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select I2C_ISA
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depends on PCI
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help
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If you say yes here you get support for the integrated sensors in
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Via 686A/B South Bridges.
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@ -34,8 +34,7 @@
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/jiffies.h>
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#include <linux/i2c.h>
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#include <linux/i2c-isa.h>
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#include <linux/platform_device.h>
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#include <linux/hwmon.h>
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#include <linux/err.h>
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#include <linux/init.h>
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@ -51,10 +50,7 @@ module_param(force_addr, ushort, 0);
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MODULE_PARM_DESC(force_addr,
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"Initialize the base address of the sensors");
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/* Device address
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Note that we can't determine the ISA address until we have initialized
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our module */
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static unsigned short address;
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static struct platform_device *pdev;
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/*
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The Via 686a southbridge has a LM78-like chip integrated on the same IC.
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@ -295,7 +291,8 @@ static inline long TEMP_FROM_REG10(u16 val)
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/* For each registered chip, we need to keep some data in memory.
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The structure is dynamically allocated. */
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struct via686a_data {
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struct i2c_client client;
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unsigned short addr;
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const char *name;
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struct class_device *class_dev;
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struct mutex update_lock;
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char valid; /* !=0 if following fields are valid */
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@ -315,22 +312,22 @@ struct via686a_data {
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static struct pci_dev *s_bridge; /* pointer to the (only) via686a */
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static int via686a_detect(struct i2c_adapter *adapter);
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static int via686a_detach_client(struct i2c_client *client);
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static int via686a_probe(struct platform_device *pdev);
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static int via686a_remove(struct platform_device *pdev);
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static inline int via686a_read_value(struct i2c_client *client, u8 reg)
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static inline int via686a_read_value(struct via686a_data *data, u8 reg)
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{
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return (inb_p(client->addr + reg));
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return inb_p(data->addr + reg);
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}
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static inline void via686a_write_value(struct i2c_client *client, u8 reg,
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static inline void via686a_write_value(struct via686a_data *data, u8 reg,
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u8 value)
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{
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outb_p(value, client->addr + reg);
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outb_p(value, data->addr + reg);
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}
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static struct via686a_data *via686a_update_device(struct device *dev);
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static void via686a_init_client(struct i2c_client *client);
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static void via686a_init_device(struct via686a_data *data);
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/* following are the sysfs callback functions */
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@ -352,26 +349,24 @@ static ssize_t show_in_max(struct device *dev, char *buf, int nr) {
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static ssize_t set_in_min(struct device *dev, const char *buf,
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size_t count, int nr) {
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struct i2c_client *client = to_i2c_client(dev);
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struct via686a_data *data = i2c_get_clientdata(client);
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struct via686a_data *data = dev_get_drvdata(dev);
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unsigned long val = simple_strtoul(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->in_min[nr] = IN_TO_REG(val, nr);
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via686a_write_value(client, VIA686A_REG_IN_MIN(nr),
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via686a_write_value(data, VIA686A_REG_IN_MIN(nr),
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data->in_min[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t set_in_max(struct device *dev, const char *buf,
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size_t count, int nr) {
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struct i2c_client *client = to_i2c_client(dev);
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struct via686a_data *data = i2c_get_clientdata(client);
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struct via686a_data *data = dev_get_drvdata(dev);
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unsigned long val = simple_strtoul(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->in_max[nr] = IN_TO_REG(val, nr);
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via686a_write_value(client, VIA686A_REG_IN_MAX(nr),
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via686a_write_value(data, VIA686A_REG_IN_MAX(nr),
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data->in_max[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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@ -429,26 +424,24 @@ static ssize_t show_temp_hyst(struct device *dev, char *buf, int nr) {
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}
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static ssize_t set_temp_over(struct device *dev, const char *buf,
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size_t count, int nr) {
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struct i2c_client *client = to_i2c_client(dev);
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struct via686a_data *data = i2c_get_clientdata(client);
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struct via686a_data *data = dev_get_drvdata(dev);
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int val = simple_strtol(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->temp_over[nr] = TEMP_TO_REG(val);
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via686a_write_value(client, VIA686A_REG_TEMP_OVER[nr],
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via686a_write_value(data, VIA686A_REG_TEMP_OVER[nr],
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data->temp_over[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t set_temp_hyst(struct device *dev, const char *buf,
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size_t count, int nr) {
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struct i2c_client *client = to_i2c_client(dev);
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struct via686a_data *data = i2c_get_clientdata(client);
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struct via686a_data *data = dev_get_drvdata(dev);
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int val = simple_strtol(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->temp_hyst[nr] = TEMP_TO_REG(val);
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via686a_write_value(client, VIA686A_REG_TEMP_HYST[nr],
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via686a_write_value(data, VIA686A_REG_TEMP_HYST[nr],
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data->temp_hyst[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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@ -505,28 +498,26 @@ static ssize_t show_fan_div(struct device *dev, char *buf, int nr) {
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}
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static ssize_t set_fan_min(struct device *dev, const char *buf,
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size_t count, int nr) {
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struct i2c_client *client = to_i2c_client(dev);
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struct via686a_data *data = i2c_get_clientdata(client);
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struct via686a_data *data = dev_get_drvdata(dev);
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int val = simple_strtol(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
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via686a_write_value(client, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]);
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via686a_write_value(data, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t set_fan_div(struct device *dev, const char *buf,
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size_t count, int nr) {
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struct i2c_client *client = to_i2c_client(dev);
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struct via686a_data *data = i2c_get_clientdata(client);
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struct via686a_data *data = dev_get_drvdata(dev);
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int val = simple_strtol(buf, NULL, 10);
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int old;
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mutex_lock(&data->update_lock);
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old = via686a_read_value(client, VIA686A_REG_FANDIV);
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old = via686a_read_value(data, VIA686A_REG_FANDIV);
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data->fan_div[nr] = DIV_TO_REG(val);
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old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
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via686a_write_value(client, VIA686A_REG_FANDIV, old);
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via686a_write_value(data, VIA686A_REG_FANDIV, old);
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mutex_unlock(&data->update_lock);
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return count;
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}
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@ -570,6 +561,14 @@ static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, ch
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}
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static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
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static ssize_t show_name(struct device *dev, struct device_attribute
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*devattr, char *buf)
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{
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struct via686a_data *data = dev_get_drvdata(dev);
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return sprintf(buf, "%s\n", data->name);
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}
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static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
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static struct attribute *via686a_attributes[] = {
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&dev_attr_in0_input.attr,
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&dev_attr_in1_input.attr,
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@ -605,6 +604,7 @@ static struct attribute *via686a_attributes[] = {
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&dev_attr_fan2_div.attr,
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&dev_attr_alarms.attr,
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&dev_attr_name.attr,
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NULL
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};
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@ -612,58 +612,29 @@ static const struct attribute_group via686a_group = {
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.attrs = via686a_attributes,
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};
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/* The driver. I choose to use type i2c_driver, as at is identical to both
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smbus_driver and isa_driver, and clients could be of either kind */
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static struct i2c_driver via686a_driver = {
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static struct platform_driver via686a_driver = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "via686a",
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},
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.attach_adapter = via686a_detect,
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.detach_client = via686a_detach_client,
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.probe = via686a_probe,
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.remove = __devexit_p(via686a_remove),
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};
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/* This is called when the module is loaded */
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static int via686a_detect(struct i2c_adapter *adapter)
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static int __devinit via686a_probe(struct platform_device *pdev)
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{
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struct i2c_client *new_client;
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struct via686a_data *data;
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int err = 0;
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const char client_name[] = "via686a";
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u16 val;
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/* 8231 requires multiple of 256, we enforce that on 686 as well */
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if (force_addr) {
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address = force_addr & 0xFF00;
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dev_warn(&adapter->dev, "forcing ISA address 0x%04X\n",
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address);
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if (PCIBIOS_SUCCESSFUL !=
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pci_write_config_word(s_bridge, VIA686A_BASE_REG, address))
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return -ENODEV;
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}
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if (PCIBIOS_SUCCESSFUL !=
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pci_read_config_word(s_bridge, VIA686A_ENABLE_REG, &val))
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return -ENODEV;
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if (!(val & 0x0001)) {
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if (force_addr) {
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dev_info(&adapter->dev, "enabling sensors\n");
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if (PCIBIOS_SUCCESSFUL !=
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pci_write_config_word(s_bridge, VIA686A_ENABLE_REG,
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val | 0x0001))
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return -ENODEV;
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} else {
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dev_warn(&adapter->dev, "sensors disabled - enable "
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"with force_addr=0x%x\n", address);
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return -ENODEV;
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}
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}
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struct resource *res;
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int err;
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/* Reserve the ISA region */
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if (!request_region(address, VIA686A_EXTENT,
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res = platform_get_resource(pdev, IORESOURCE_IO, 0);
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if (!request_region(res->start, VIA686A_EXTENT,
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via686a_driver.driver.name)) {
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dev_err(&adapter->dev, "region 0x%x already in use!\n",
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address);
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dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
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(unsigned long)res->start, (unsigned long)res->end);
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return -ENODEV;
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}
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@ -672,30 +643,19 @@ static int via686a_detect(struct i2c_adapter *adapter)
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goto exit_release;
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}
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new_client = &data->client;
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i2c_set_clientdata(new_client, data);
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new_client->addr = address;
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new_client->adapter = adapter;
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new_client->driver = &via686a_driver;
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new_client->flags = 0;
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/* Fill in the remaining client fields and put into the global list */
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strlcpy(new_client->name, client_name, I2C_NAME_SIZE);
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data->valid = 0;
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platform_set_drvdata(pdev, data);
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data->addr = res->start;
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data->name = "via686a";
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mutex_init(&data->update_lock);
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/* Tell the I2C layer a new client has arrived */
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if ((err = i2c_attach_client(new_client)))
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goto exit_free;
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/* Initialize the VIA686A chip */
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via686a_init_client(new_client);
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via686a_init_device(data);
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/* Register sysfs hooks */
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if ((err = sysfs_create_group(&new_client->dev.kobj, &via686a_group)))
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goto exit_detach;
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if ((err = sysfs_create_group(&pdev->dev.kobj, &via686a_group)))
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goto exit_free;
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data->class_dev = hwmon_device_register(&new_client->dev);
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data->class_dev = hwmon_device_register(&pdev->dev);
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if (IS_ERR(data->class_dev)) {
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err = PTR_ERR(data->class_dev);
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goto exit_remove_files;
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@ -704,52 +664,46 @@ static int via686a_detect(struct i2c_adapter *adapter)
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return 0;
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exit_remove_files:
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sysfs_remove_group(&new_client->dev.kobj, &via686a_group);
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exit_detach:
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i2c_detach_client(new_client);
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sysfs_remove_group(&pdev->dev.kobj, &via686a_group);
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exit_free:
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kfree(data);
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exit_release:
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release_region(address, VIA686A_EXTENT);
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release_region(res->start, VIA686A_EXTENT);
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return err;
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}
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static int via686a_detach_client(struct i2c_client *client)
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static int __devexit via686a_remove(struct platform_device *pdev)
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{
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struct via686a_data *data = i2c_get_clientdata(client);
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int err;
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struct via686a_data *data = platform_get_drvdata(pdev);
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hwmon_device_unregister(data->class_dev);
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sysfs_remove_group(&client->dev.kobj, &via686a_group);
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sysfs_remove_group(&pdev->dev.kobj, &via686a_group);
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if ((err = i2c_detach_client(client)))
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return err;
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release_region(client->addr, VIA686A_EXTENT);
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release_region(data->addr, VIA686A_EXTENT);
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platform_set_drvdata(pdev, NULL);
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kfree(data);
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return 0;
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}
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static void via686a_init_client(struct i2c_client *client)
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static void __devinit via686a_init_device(struct via686a_data *data)
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{
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u8 reg;
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/* Start monitoring */
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reg = via686a_read_value(client, VIA686A_REG_CONFIG);
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via686a_write_value(client, VIA686A_REG_CONFIG, (reg|0x01)&0x7F);
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reg = via686a_read_value(data, VIA686A_REG_CONFIG);
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via686a_write_value(data, VIA686A_REG_CONFIG, (reg | 0x01) & 0x7F);
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/* Configure temp interrupt mode for continuous-interrupt operation */
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reg = via686a_read_value(client, VIA686A_REG_TEMP_MODE);
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via686a_write_value(client, VIA686A_REG_TEMP_MODE,
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reg = via686a_read_value(data, VIA686A_REG_TEMP_MODE);
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via686a_write_value(data, VIA686A_REG_TEMP_MODE,
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(reg & ~VIA686A_TEMP_MODE_MASK)
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| VIA686A_TEMP_MODE_CONTINUOUS);
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}
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static struct via686a_data *via686a_update_device(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct via686a_data *data = i2c_get_clientdata(client);
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struct via686a_data *data = dev_get_drvdata(dev);
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int i;
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mutex_lock(&data->update_lock);
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@ -758,27 +712,27 @@ static struct via686a_data *via686a_update_device(struct device *dev)
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|| !data->valid) {
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for (i = 0; i <= 4; i++) {
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data->in[i] =
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via686a_read_value(client, VIA686A_REG_IN(i));
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data->in_min[i] = via686a_read_value(client,
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via686a_read_value(data, VIA686A_REG_IN(i));
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data->in_min[i] = via686a_read_value(data,
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VIA686A_REG_IN_MIN
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(i));
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data->in_max[i] =
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via686a_read_value(client, VIA686A_REG_IN_MAX(i));
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via686a_read_value(data, VIA686A_REG_IN_MAX(i));
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}
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for (i = 1; i <= 2; i++) {
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data->fan[i - 1] =
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via686a_read_value(client, VIA686A_REG_FAN(i));
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data->fan_min[i - 1] = via686a_read_value(client,
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via686a_read_value(data, VIA686A_REG_FAN(i));
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data->fan_min[i - 1] = via686a_read_value(data,
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VIA686A_REG_FAN_MIN(i));
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}
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for (i = 0; i <= 2; i++) {
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data->temp[i] = via686a_read_value(client,
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data->temp[i] = via686a_read_value(data,
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VIA686A_REG_TEMP[i]) << 2;
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data->temp_over[i] =
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via686a_read_value(client,
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via686a_read_value(data,
|
||||
VIA686A_REG_TEMP_OVER[i]);
|
||||
data->temp_hyst[i] =
|
||||
via686a_read_value(client,
|
||||
via686a_read_value(data,
|
||||
VIA686A_REG_TEMP_HYST[i]);
|
||||
}
|
||||
/* add in lower 2 bits
|
||||
|
|
@ -786,23 +740,23 @@ static struct via686a_data *via686a_update_device(struct device *dev)
|
|||
temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23
|
||||
temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23
|
||||
*/
|
||||
data->temp[0] |= (via686a_read_value(client,
|
||||
data->temp[0] |= (via686a_read_value(data,
|
||||
VIA686A_REG_TEMP_LOW1)
|
||||
& 0xc0) >> 6;
|
||||
data->temp[1] |=
|
||||
(via686a_read_value(client, VIA686A_REG_TEMP_LOW23) &
|
||||
(via686a_read_value(data, VIA686A_REG_TEMP_LOW23) &
|
||||
0x30) >> 4;
|
||||
data->temp[2] |=
|
||||
(via686a_read_value(client, VIA686A_REG_TEMP_LOW23) &
|
||||
(via686a_read_value(data, VIA686A_REG_TEMP_LOW23) &
|
||||
0xc0) >> 6;
|
||||
|
||||
i = via686a_read_value(client, VIA686A_REG_FANDIV);
|
||||
i = via686a_read_value(data, VIA686A_REG_FANDIV);
|
||||
data->fan_div[0] = (i >> 4) & 0x03;
|
||||
data->fan_div[1] = i >> 6;
|
||||
data->alarms =
|
||||
via686a_read_value(client,
|
||||
via686a_read_value(data,
|
||||
VIA686A_REG_ALARM1) |
|
||||
(via686a_read_value(client, VIA686A_REG_ALARM2) << 8);
|
||||
(via686a_read_value(data, VIA686A_REG_ALARM2) << 8);
|
||||
data->last_updated = jiffies;
|
||||
data->valid = 1;
|
||||
}
|
||||
|
|
@ -819,32 +773,102 @@ static struct pci_device_id via686a_pci_ids[] = {
|
|||
|
||||
MODULE_DEVICE_TABLE(pci, via686a_pci_ids);
|
||||
|
||||
static int __devinit via686a_device_add(unsigned short address)
|
||||
{
|
||||
struct resource res = {
|
||||
.start = address,
|
||||
.end = address + VIA686A_EXTENT - 1,
|
||||
.name = "via686a",
|
||||
.flags = IORESOURCE_IO,
|
||||
};
|
||||
int err;
|
||||
|
||||
pdev = platform_device_alloc("via686a", address);
|
||||
if (!pdev) {
|
||||
err = -ENOMEM;
|
||||
printk(KERN_ERR "via686a: Device allocation failed\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
err = platform_device_add_resources(pdev, &res, 1);
|
||||
if (err) {
|
||||
printk(KERN_ERR "via686a: Device resource addition failed "
|
||||
"(%d)\n", err);
|
||||
goto exit_device_put;
|
||||
}
|
||||
|
||||
err = platform_device_add(pdev);
|
||||
if (err) {
|
||||
printk(KERN_ERR "via686a: Device addition failed (%d)\n",
|
||||
err);
|
||||
goto exit_device_put;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
exit_device_put:
|
||||
platform_device_put(pdev);
|
||||
exit:
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __devinit via686a_pci_probe(struct pci_dev *dev,
|
||||
const struct pci_device_id *id)
|
||||
{
|
||||
u16 val;
|
||||
u16 address, val;
|
||||
|
||||
if (force_addr) {
|
||||
address = force_addr & ~(VIA686A_EXTENT - 1);
|
||||
dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", address);
|
||||
if (PCIBIOS_SUCCESSFUL !=
|
||||
pci_write_config_word(dev, VIA686A_BASE_REG, address | 1))
|
||||
return -ENODEV;
|
||||
}
|
||||
if (PCIBIOS_SUCCESSFUL !=
|
||||
pci_read_config_word(dev, VIA686A_BASE_REG, &val))
|
||||
return -ENODEV;
|
||||
|
||||
address = val & ~(VIA686A_EXTENT - 1);
|
||||
if (address == 0 && force_addr == 0) {
|
||||
if (address == 0) {
|
||||
dev_err(&dev->dev, "base address not set - upgrade BIOS "
|
||||
"or use force_addr=0xaddr\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
s_bridge = pci_dev_get(dev);
|
||||
if (i2c_isa_add_driver(&via686a_driver)) {
|
||||
pci_dev_put(s_bridge);
|
||||
s_bridge = NULL;
|
||||
if (PCIBIOS_SUCCESSFUL !=
|
||||
pci_read_config_word(dev, VIA686A_ENABLE_REG, &val))
|
||||
return -ENODEV;
|
||||
if (!(val & 0x0001)) {
|
||||
if (!force_addr) {
|
||||
dev_warn(&dev->dev, "Sensors disabled, enable "
|
||||
"with force_addr=0x%x\n", address);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
dev_warn(&dev->dev, "Enabling sensors\n");
|
||||
if (PCIBIOS_SUCCESSFUL !=
|
||||
pci_write_config_word(dev, VIA686A_ENABLE_REG,
|
||||
val | 0x0001))
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
if (platform_driver_register(&via686a_driver))
|
||||
goto exit;
|
||||
|
||||
/* Sets global pdev as a side effect */
|
||||
if (via686a_device_add(address))
|
||||
goto exit_unregister;
|
||||
|
||||
/* Always return failure here. This is to allow other drivers to bind
|
||||
* to this pci device. We don't really want to have control over the
|
||||
* pci device, we only wanted to read as few register values from it.
|
||||
*/
|
||||
s_bridge = pci_dev_get(dev);
|
||||
return -ENODEV;
|
||||
|
||||
exit_unregister:
|
||||
platform_driver_unregister(&via686a_driver);
|
||||
exit:
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
|
|
@ -863,7 +887,8 @@ static void __exit sm_via686a_exit(void)
|
|||
{
|
||||
pci_unregister_driver(&via686a_pci_driver);
|
||||
if (s_bridge != NULL) {
|
||||
i2c_isa_del_driver(&via686a_driver);
|
||||
platform_device_unregister(pdev);
|
||||
platform_driver_unregister(&via686a_driver);
|
||||
pci_dev_put(s_bridge);
|
||||
s_bridge = NULL;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue