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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>
This commit is contained in:
Javier Achirica 2014-03-21 08:01:16 +09:00 committed by Matthew Garrett
parent 2a26f34158
commit c62f15395c
1 changed files with 119 additions and 0 deletions
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119
drivers/platform/x86/sony-laptop.c
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@ -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;