hwmon: (gpio-fan) Get rid of platform data struct

We are not passing the platform data struct into the driver from the
outside, there is no point of having it around separately so instead
of first populating the platform data struct and assigning the result
into the same variables in the state container (struct gpio_fan_data)
just assign the configuration from the device tree directly into the
state container members.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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),
+	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;
 	}