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-rw-r--r--drivers/platform/x86/sony-laptop.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index 7b5a56d59bac..ba39a29a9f39 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_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;