sony-laptop: add hibernate on low battery function (168de1ad) · Commits · 戴 / test

drivers/platform/x86/sony-laptop.c

+78 −0

Original line number	Diff line number	Diff line
		@@ -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;

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