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path: root/drivers/hwmon/gpio-fan.c
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Diffstat (limited to 'drivers/hwmon/gpio-fan.c')
-rw-r--r--drivers/hwmon/gpio-fan.c88
1 files changed, 30 insertions, 58 deletions
diff --git a/drivers/hwmon/gpio-fan.c b/drivers/hwmon/gpio-fan.c
index 55dbdb223e02..000c8d2e0987 100644
--- a/drivers/hwmon/gpio-fan.c
+++ b/drivers/hwmon/gpio-fan.c
@@ -45,18 +45,6 @@ struct gpio_fan_speed {
int ctrl_val;
};
-struct gpio_fan_platform_data {
- int num_ctrl;
- unsigned int *ctrl; /* fan control GPIOs. */
- struct gpio_fan_alarm *alarm; /* fan alarm GPIO. */
- /*
- * Speed conversion array: rpm from/to GPIO bit field.
- * This array _must_ be sorted in ascending rpm order.
- */
- int num_speed;
- struct gpio_fan_speed *speed;
-};
-
struct gpio_fan_data {
struct device *dev;
struct device *hwmon_dev;
@@ -113,14 +101,12 @@ static ssize_t fan1_alarm_show(struct device *dev,
static DEVICE_ATTR_RO(fan1_alarm);
-static int fan_alarm_init(struct gpio_fan_data *fan_data,
- struct gpio_fan_alarm *alarm)
+static int fan_alarm_init(struct gpio_fan_data *fan_data)
{
int err;
int alarm_irq;
struct device *dev = fan_data->dev;
-
- fan_data->alarm = alarm;
+ struct gpio_fan_alarm *alarm = fan_data->alarm;
err = devm_gpio_request(dev, alarm->gpio, "GPIO fan alarm");
if (err)
@@ -379,12 +365,11 @@ static const struct attribute_group *gpio_fan_groups[] = {
NULL
};
-static int fan_ctrl_init(struct gpio_fan_data *fan_data,
- struct gpio_fan_platform_data *pdata)
+static int fan_ctrl_init(struct gpio_fan_data *fan_data)
{
struct device *dev = fan_data->dev;
- int num_ctrl = pdata->num_ctrl;
- unsigned *ctrl = pdata->ctrl;
+ int num_ctrl = fan_data->num_ctrl;
+ unsigned int *ctrl = fan_data->ctrl;
int i, err;
for (i = 0; i < num_ctrl; i++) {
@@ -399,10 +384,6 @@ static int fan_ctrl_init(struct gpio_fan_data *fan_data,
return err;
}
- fan_data->num_ctrl = num_ctrl;
- fan_data->ctrl = ctrl;
- fan_data->num_speed = pdata->num_speed;
- fan_data->speed = pdata->speed;
fan_data->pwm_enable = true; /* Enable manual fan speed control. */
fan_data->speed_index = get_fan_speed_index(fan_data);
if (fan_data->speed_index < 0)
@@ -456,21 +437,19 @@ static const struct thermal_cooling_device_ops gpio_fan_cool_ops = {
/*
* Translate OpenFirmware node properties into platform_data
*/
-static int gpio_fan_get_of_pdata(struct device *dev,
- struct gpio_fan_platform_data *pdata)
+static int gpio_fan_get_of_data(struct gpio_fan_data *fan_data)
{
- struct device_node *node;
struct gpio_fan_speed *speed;
+ struct device *dev = fan_data->dev;
+ struct device_node *np = dev->of_node;
unsigned *ctrl;
unsigned i;
u32 u;
struct property *prop;
const __be32 *p;
- node = dev->of_node;
-
/* Alarm GPIO if one exists */
- if (of_gpio_named_count(node, "alarm-gpios") > 0) {
+ if (of_gpio_named_count(np, "alarm-gpios") > 0) {
struct gpio_fan_alarm *alarm;
int val;
enum of_gpio_flags flags;
@@ -480,39 +459,39 @@ static int gpio_fan_get_of_pdata(struct device *dev,
if (!alarm)
return -ENOMEM;
- val = of_get_named_gpio_flags(node, "alarm-gpios", 0, &flags);
+ val = of_get_named_gpio_flags(np, "alarm-gpios", 0, &flags);
if (val < 0)
return val;
alarm->gpio = val;
alarm->active_low = flags & OF_GPIO_ACTIVE_LOW;
- pdata->alarm = alarm;
+ fan_data->alarm = alarm;
}
/* Fill GPIO pin array */
- pdata->num_ctrl = of_gpio_count(node);
- if (pdata->num_ctrl <= 0) {
- if (pdata->alarm)
+ fan_data->num_ctrl = of_gpio_count(np);
+ if (fan_data->num_ctrl <= 0) {
+ if (fan_data->alarm)
return 0;
dev_err(dev, "DT properties empty / missing");
return -ENODEV;
}
- ctrl = devm_kzalloc(dev, pdata->num_ctrl * sizeof(unsigned),
- GFP_KERNEL);
+ ctrl = devm_kzalloc(dev, fan_data->num_ctrl * sizeof(unsigned int),
+ GFP_KERNEL);
if (!ctrl)
return -ENOMEM;
- for (i = 0; i < pdata->num_ctrl; i++) {
+ for (i = 0; i < fan_data->num_ctrl; i++) {
int val;
- val = of_get_gpio(node, i);
+ val = of_get_gpio(np, i);
if (val < 0)
return val;
ctrl[i] = val;
}
- pdata->ctrl = ctrl;
+ fan_data->ctrl = ctrl;
/* Get number of RPM/ctrl_val pairs in speed map */
- prop = of_find_property(node, "gpio-fan,speed-map", &i);
+ prop = of_find_property(np, "gpio-fan,speed-map", &i);
if (!prop) {
dev_err(dev, "gpio-fan,speed-map DT property missing");
return -ENODEV;
@@ -522,7 +501,7 @@ static int gpio_fan_get_of_pdata(struct device *dev,
dev_err(dev, "gpio-fan,speed-map contains zero/odd number of entries");
return -ENODEV;
}
- pdata->num_speed = i / 2;
+ fan_data->num_speed = i / 2;
/*
* Populate speed map
@@ -530,12 +509,12 @@ static int gpio_fan_get_of_pdata(struct device *dev,
* this needs splitting into pairs to create gpio_fan_speed structs
*/
speed = devm_kzalloc(dev,
- pdata->num_speed * sizeof(struct gpio_fan_speed),
+ fan_data->num_speed * sizeof(struct gpio_fan_speed),
GFP_KERNEL);
if (!speed)
return -ENOMEM;
p = NULL;
- for (i = 0; i < pdata->num_speed; i++) {
+ for (i = 0; i < fan_data->num_speed; i++) {
p = of_prop_next_u32(prop, p, &u);
if (!p)
return -ENODEV;
@@ -545,7 +524,7 @@ static int gpio_fan_get_of_pdata(struct device *dev,
return -ENODEV;
speed[i].ctrl_val = u;
}
- pdata->speed = speed;
+ fan_data->speed = speed;
return 0;
}
@@ -562,20 +541,13 @@ static int gpio_fan_probe(struct platform_device *pdev)
struct gpio_fan_data *fan_data;
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
- struct gpio_fan_platform_data *pdata;
fan_data = devm_kzalloc(dev, sizeof(struct gpio_fan_data),
GFP_KERNEL);
if (!fan_data)
return -ENOMEM;
- pdata = devm_kzalloc(dev,
- sizeof(struct gpio_fan_platform_data),
- GFP_KERNEL);
- if (!pdata)
- return -ENOMEM;
-
- err = gpio_fan_get_of_pdata(dev, pdata);
+ err = gpio_fan_get_of_data(fan_data);
if (err)
return err;
@@ -584,17 +556,17 @@ static int gpio_fan_probe(struct platform_device *pdev)
mutex_init(&fan_data->lock);
/* Configure alarm GPIO if available. */
- if (pdata->alarm) {
- err = fan_alarm_init(fan_data, pdata->alarm);
+ if (fan_data->alarm) {
+ err = fan_alarm_init(fan_data);
if (err)
return err;
}
/* Configure control GPIOs if available. */
- if (pdata->ctrl && pdata->num_ctrl > 0) {
- if (!pdata->speed || pdata->num_speed <= 1)
+ if (fan_data->ctrl && fan_data->num_ctrl > 0) {
+ if (!fan_data->speed || fan_data->num_speed <= 1)
return -EINVAL;
- err = fan_ctrl_init(fan_data, pdata);
+ err = fan_ctrl_init(fan_data);
if (err)
return err;
}
generated by cgit (git 2.34.1) at 2024-06-18 09:51:43 +0000