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authorJavier Achirica <jachirica@gmail.com>2014-03-21 03:01:16 +0400
committerMatthew Garrett <matthew.garrett@nebula.com>2014-04-06 20:58:12 +0400
commitc62f15395c780fff606cfec23d66417a80a5ad81 (patch)
tree5a94e892b5686b12dee564c31345ebb8d84ca9d7 /drivers/platform
parent2a26f3415865a9540b0b8a93455eeeea90a98983 (diff)
downloadlinux-c62f15395c780fff606cfec23d66417a80a5ad81.tar.xz
sony-laptop: add fan speed regulation function
Rework error exit logic by Mattia Dongili. Signed-off-by: Javier Achirica <jachirica@gmail.com> Signed-off-by: Mattia Dongili <malattia@linux.it> Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/sony-laptop.c119
1 files changed, 119 insertions, 0 deletions
diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index 9620285cb9af..7b5a56d59bac 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -164,6 +164,9 @@ static int __sony_nc_gfx_switch_status_get(void);
static int sony_nc_highspeed_charging_setup(struct platform_device *pd);
static void sony_nc_highspeed_charging_cleanup(struct platform_device *pd);
+static int sony_nc_fanspeed_setup(struct platform_device *pd);
+static void sony_nc_fanspeed_cleanup(struct platform_device *pd);
+
static int sony_nc_usb_charge_setup(struct platform_device *pd);
static void sony_nc_usb_charge_cleanup(struct platform_device *pd);
@@ -1391,6 +1394,12 @@ static void sony_nc_function_setup(struct acpi_device *device,
pr_err("couldn't set up keyboard backlight function (%d)\n",
result);
break;
+ case 0x0149:
+ result = sony_nc_fanspeed_setup(pf_device);
+ if (result)
+ pr_err("couldn't set up fan speed function (%d)\n",
+ result);
+ break;
case 0x0155:
result = sony_nc_usb_charge_setup(pf_device);
if (result)
@@ -1467,6 +1476,9 @@ static void sony_nc_function_cleanup(struct platform_device *pd)
case 0x0163:
sony_nc_kbd_backlight_cleanup(pd, handle);
break;
+ case 0x0149:
+ sony_nc_fanspeed_cleanup(pd);
+ break;
case 0x0155:
sony_nc_usb_charge_cleanup(pd);
break;
@@ -2564,6 +2576,113 @@ static void sony_nc_highspeed_charging_cleanup(struct platform_device *pd)
}
}
+/* fan speed function */
+static struct device_attribute *fan_handle, *hsf_handle;
+
+static ssize_t sony_nc_hsfan_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buffer, size_t count)
+{
+ unsigned int result;
+ unsigned long value;
+
+ if (count > 31)
+ return -EINVAL;
+
+ if (kstrtoul(buffer, 10, &value) || value > 1)
+ return -EINVAL;
+
+ if (sony_call_snc_handle(0x0149, value << 0x10 | 0x0200, &result))
+ return -EIO;
+
+ return count;
+}
+
+static ssize_t sony_nc_hsfan_show(struct device *dev,
+ struct device_attribute *attr, char *buffer)
+{
+ unsigned int result;
+
+ if (sony_call_snc_handle(0x0149, 0x0100, &result))
+ return -EIO;
+
+ return snprintf(buffer, PAGE_SIZE, "%d\n", result & 0x01);
+}
+
+static ssize_t sony_nc_fanspeed_show(struct device *dev,
+ struct device_attribute *attr, char *buffer)
+{
+ unsigned int result;
+
+ if (sony_call_snc_handle(0x0149, 0x0300, &result))
+ return -EIO;
+
+ return snprintf(buffer, PAGE_SIZE, "%d\n", result & 0xff);
+}
+
+static int sony_nc_fanspeed_setup(struct platform_device *pd)
+{
+ unsigned int result;
+
+ fan_handle = kzalloc(sizeof(struct device_attribute), GFP_KERNEL);
+ if (!fan_handle)
+ return -ENOMEM;
+
+ hsf_handle = kzalloc(sizeof(struct device_attribute), GFP_KERNEL);
+ if (!hsf_handle) {
+ result = -ENOMEM;
+ goto out_hsf_handle_alloc;
+ }
+
+ sysfs_attr_init(&fan_handle->attr);
+ fan_handle->attr.name = "fanspeed";
+ fan_handle->attr.mode = S_IRUGO;
+ fan_handle->show = sony_nc_fanspeed_show;
+ fan_handle->store = NULL;
+
+ sysfs_attr_init(&hsf_handle->attr);
+ hsf_handle->attr.name = "fan_forced";
+ hsf_handle->attr.mode = S_IRUGO | S_IWUSR;
+ hsf_handle->show = sony_nc_hsfan_show;
+ hsf_handle->store = sony_nc_hsfan_store;
+
+ result = device_create_file(&pd->dev, fan_handle);
+ if (result)
+ goto out_fan_handle;
+
+ result = device_create_file(&pd->dev, hsf_handle);
+ if (result)
+ goto out_hsf_handle;
+
+ return 0;
+
+out_hsf_handle:
+ device_remove_file(&pd->dev, fan_handle);
+
+out_fan_handle:
+ kfree(hsf_handle);
+ hsf_handle = NULL;
+
+out_hsf_handle_alloc:
+ kfree(fan_handle);
+ fan_handle = NULL;
+ return result;
+}
+
+static void sony_nc_fanspeed_cleanup(struct platform_device *pd)
+{
+ if (fan_handle) {
+ device_remove_file(&pd->dev, fan_handle);
+ kfree(fan_handle);
+ fan_handle = NULL;
+ }
+ if (hsf_handle) {
+ device_remove_file(&pd->dev, hsf_handle);
+ kfree(hsf_handle);
+ hsf_handle = NULL;
+ }
+}
+
/* USB charge function */
static struct device_attribute *uc_handle;