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sony-laptop: add hibernate on low battery function

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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 08:01:17 +09:00 committed by Matthew Garrett
parent c62f15395c
commit 168de1add4
1 changed files with 78 additions and 0 deletions
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78
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_lowbatt_setup(struct platform_device *pd);
static void sony_nc_lowbatt_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);
@ -1394,6 +1397,12 @@ static void sony_nc_function_setup(struct acpi_device *device,
pr_err("couldn't set up keyboard backlight function (%d)\n",
result);
break;
case 0x0121:
result = sony_nc_lowbatt_setup(pf_device);
if (result)
pr_err("couldn't set up low battery function (%d)\n",
result);
break;
case 0x0149:
result = sony_nc_fanspeed_setup(pf_device);
if (result)
@ -1476,6 +1485,9 @@ static void sony_nc_function_cleanup(struct platform_device *pd)
case 0x0163:
sony_nc_kbd_backlight_cleanup(pd, handle);
break;
case 0x0121:
sony_nc_lowbatt_cleanup(pd);
break;
case 0x0149:
sony_nc_fanspeed_cleanup(pd);
break;
@ -2576,6 +2588,72 @@ static void sony_nc_highspeed_charging_cleanup(struct platform_device *pd)
}
}
/* low battery function */
static struct device_attribute *lowbatt_handle;
static ssize_t sony_nc_lowbatt_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(0x0121, value << 8, &result))
return -EIO;
return count;
}
static ssize_t sony_nc_lowbatt_show(struct device *dev,
struct device_attribute *attr, char *buffer)
{
unsigned int result;
if (sony_call_snc_handle(0x0121, 0x0200, &result))
return -EIO;
return snprintf(buffer, PAGE_SIZE, "%d\n", result & 1);
}
static int sony_nc_lowbatt_setup(struct platform_device *pd)
{
unsigned int result;
lowbatt_handle = kzalloc(sizeof(struct device_attribute), GFP_KERNEL);
if (!lowbatt_handle)
return -ENOMEM;
sysfs_attr_init(&lowbatt_handle->attr);
lowbatt_handle->attr.name = "lowbatt_hibernate";
lowbatt_handle->attr.mode = S_IRUGO | S_IWUSR;
lowbatt_handle->show = sony_nc_lowbatt_show;
lowbatt_handle->store = sony_nc_lowbatt_store;
result = device_create_file(&pd->dev, lowbatt_handle);
if (result) {
kfree(lowbatt_handle);
lowbatt_handle = NULL;
return result;
}
return 0;
}
static void sony_nc_lowbatt_cleanup(struct platform_device *pd)
{
if (lowbatt_handle) {
device_remove_file(&pd->dev, lowbatt_handle);
kfree(lowbatt_handle);
lowbatt_handle = NULL;
}
}
/* fan speed function */
static struct device_attribute *fan_handle, *hsf_handle;