Merge tag 'v3.7-rc1' into staging/for_v3.8

Linux 3.7-rc1

* tag 'v3.7-rc1': (9579 commits)
  Linux 3.7-rc1
  x86, boot: Explicitly include autoconf.h for hostprogs
  perf: Fix UAPI fallout
  ARM: config: make sure that platforms are ordered by option string
  ARM: config: sort select statements alphanumerically
  UAPI: (Scripted) Disintegrate include/linux/byteorder
  UAPI: (Scripted) Disintegrate include/linux
  UAPI: Unexport linux/blk_types.h
  UAPI: Unexport part of linux/ppp-comp.h
  perf: Handle new rbtree implementation
  procfs: don't need a PATH_MAX allocation to hold a string representation of an int
  vfs: embed struct filename inside of names_cache allocation if possible
  audit: make audit_inode take struct filename
  vfs: make path_openat take a struct filename pointer
  vfs: turn do_path_lookup into wrapper around struct filename variant
  audit: allow audit code to satisfy getname requests from its names_list
  vfs: define struct filename and have getname() return it
  btrfs: Fix compilation with user namespace support enabled
  userns: Fix posix_acl_file_xattr_userns gid conversion
  userns: Properly print bluetooth socket uids
  ...

1 files changed, 120 insertions, 0 deletions

diff --git a/drivers/hwmon/gpio-fan.c b/drivers/hwmon/gpio-fan.c
index 2f4b01bda87..36509ae3208 100644
--- a/drivers/hwmon/gpio-fan.c
+++ b/drivers/hwmon/gpio-fan.c
@@ -31,6 +31,8 @@
 #include <linux/hwmon.h>
 #include <linux/gpio.h>
 #include <linux/gpio-fan.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
 
 struct gpio_fan_data {
 	struct platform_device	*pdev;
@@ -400,14 +402,131 @@ static ssize_t show_name(struct device *dev,
 
 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
 
+
+#ifdef CONFIG_OF_GPIO
+/*
+ * Translate OpenFirmware node properties into platform_data
+ */
+static int gpio_fan_get_of_pdata(struct device *dev,
+			    struct gpio_fan_platform_data *pdata)
+{
+	struct device_node *node;
+	struct gpio_fan_speed *speed;
+	unsigned *ctrl;
+	unsigned i;
+	u32 u;
+	struct property *prop;
+	const __be32 *p;
+
+	node = dev->of_node;
+
+	/* Fill GPIO pin array */
+	pdata->num_ctrl = of_gpio_count(node);
+	if (!pdata->num_ctrl) {
+		dev_err(dev, "gpios DT property empty / missing");
+		return -ENODEV;
+	}
+	ctrl = devm_kzalloc(dev, pdata->num_ctrl * sizeof(unsigned),
+				GFP_KERNEL);
+	if (!ctrl)
+		return -ENOMEM;
+	for (i = 0; i < pdata->num_ctrl; i++) {
+		int val;
+
+		val = of_get_gpio(node, i);
+		if (val < 0)
+			return val;
+		ctrl[i] = val;
+	}
+	pdata->ctrl = ctrl;
+
+	/* Get number of RPM/ctrl_val pairs in speed map */
+	prop = of_find_property(node, "gpio-fan,speed-map", &i);
+	if (!prop) {
+		dev_err(dev, "gpio-fan,speed-map DT property missing");
+		return -ENODEV;
+	}
+	i = i / sizeof(u32);
+	if (i == 0 || i & 1) {
+		dev_err(dev, "gpio-fan,speed-map contains zero/odd number of entries");
+		return -ENODEV;
+	}
+	pdata->num_speed = i / 2;
+
+	/*
+	 * Populate speed map
+	 * Speed map is in the form <RPM ctrl_val RPM ctrl_val ...>
+	 * this needs splitting into pairs to create gpio_fan_speed structs
+	 */
+	speed = devm_kzalloc(dev,
+			pdata->num_speed * sizeof(struct gpio_fan_speed),
+			GFP_KERNEL);
+	if (!speed)
+		return -ENOMEM;
+	p = NULL;
+	for (i = 0; i < pdata->num_speed; i++) {
+		p = of_prop_next_u32(prop, p, &u);
+		if (!p)
+			return -ENODEV;
+		speed[i].rpm = u;
+		p = of_prop_next_u32(prop, p, &u);
+		if (!p)
+			return -ENODEV;
+		speed[i].ctrl_val = u;
+	}
+	pdata->speed = speed;
+
+	/* Alarm GPIO if one exists */
+	if (of_gpio_named_count(node, "alarm-gpios")) {
+		struct gpio_fan_alarm *alarm;
+		int val;
+		enum of_gpio_flags flags;
+
+		alarm = devm_kzalloc(dev, sizeof(struct gpio_fan_alarm),
+					GFP_KERNEL);
+		if (!alarm)
+			return -ENOMEM;
+
+		val = of_get_named_gpio_flags(node, "alarm-gpios", 0, &flags);
+		if (val < 0)
+			return val;
+		alarm->gpio = val;
+		alarm->active_low = flags & OF_GPIO_ACTIVE_LOW;
+
+		pdata->alarm = alarm;
+	}
+
+	return 0;
+}
+
+static struct of_device_id of_gpio_fan_match[] __devinitdata = {
+	{ .compatible = "gpio-fan", },
+	{},
+};
+#endif /* CONFIG_OF_GPIO */
+
 static int __devinit gpio_fan_probe(struct platform_device *pdev)
 {
 	int err;
 	struct gpio_fan_data *fan_data;
 	struct gpio_fan_platform_data *pdata = pdev->dev.platform_data;
 
+#ifdef CONFIG_OF_GPIO
+	if (!pdata) {
+		pdata = devm_kzalloc(&pdev->dev,
+					sizeof(struct gpio_fan_platform_data),
+					GFP_KERNEL);
+		if (!pdata)
+			return -ENOMEM;
+
+		err = gpio_fan_get_of_pdata(&pdev->dev, pdata);
+		if (err)
+			return err;
+	}
+#else /* CONFIG_OF_GPIO */
 	if (!pdata)
 		return -EINVAL;
+#endif /* CONFIG_OF_GPIO */
 
 	fan_data = devm_kzalloc(&pdev->dev, sizeof(struct gpio_fan_data),
 				GFP_KERNEL);
@@ -511,6 +630,7 @@ static struct platform_driver gpio_fan_driver = {
 	.driver	= {
 		.name	= "gpio-fan",
 		.pm	= GPIO_FAN_PM,
+		.of_match_table = of_match_ptr(of_gpio_fan_match),
 	},
 };