{ }}; static const struct soc_device_data soc_device_PNP0C40 = {	.button_info = soc_button_PNP0C40,}; static const struct soc_button_info soc_button_INT33D3[] = {	{ "tablet_mode", 0, EV_SW, SW_TABLET_MODE, false, false, false },	{ }}; static const struct soc_device_data soc_device_INT33D3 = {	.button_info = soc_button_INT33D3,}; /* * Button info for Microsoft Surface 3 (non pro), this is identical to * the PNP0C40 info except that the home button is active-high. * * The Surface 3 Pro also has a MSHW0028 ACPI device, but that uses a custom * version of the drivers/platform/x86/intel/hid.c 5 button array ACPI API * instead. A check() callback is not necessary though as the Surface 3 Pro * MSHW0028 ACPI device's resource table does not contain any GPIOs. */static const struct soc_button_info soc_button_MSHW0028[] = {	{ "power", 0, EV_KEY, KEY_POWER, false, true, true },	{ "home", 1, EV_KEY, KEY_LEFTMETA, false, true, false },	{ "volume_up", 2, EV_KEY, KEY_VOLUMEUP, true, false, true },	{ "volume_down", 3, EV_KEY, KEY_VOLUMEDOWN, true, false, true },	{ }}; static const struct soc_device_data soc_device_MSHW0028 = {	.button_info = soc_button_MSHW0028,}; /* * Special device check for Surface Book 2 and Surface Pro (2017). * Both, the Surface Pro 4 (surfacepro3_button.c) and the above mentioned * devices use MSHW0040 for power and volume buttons, however the way they * have to be addressed differs. Make sure that we only load this drivers * for the correct devices by checking the OEM Platform Revision provided by * the _DSM method. */#define MSHW0040_DSM_REVISION		0x01#define MSHW0040_DSM_GET_OMPR		0x02	// get OEM Platform Revisionstatic const guid_t MSHW0040_DSM_UUID =	GUID_INIT(0x6fd05c69, 0xcde3, 0x49f4, 0x95, 0xed, 0xab, 0x16, 0x65,		  0x49, 0x80, 0x35); static int soc_device_check_MSHW0040(struct device *dev){	acpi_handle handle = ACPI_HANDLE(dev);	union acpi_object *result;	u64 oem_platform_rev = 0;	// valid revisions are nonzero 	// get OEM platform revision	result = acpi_evaluate_dsm_typed(handle, &MSHW0040_DSM_UUID,					 MSHW0040_DSM_REVISION,					 MSHW0040_DSM_GET_OMPR, NULL,					 ACPI_TYPE_INTEGER); 	if (result) {		oem_platform_rev = result->integer.value;		ACPI_FREE(result);	} 	/*	 * If the revision is zero here, the _DSM evaluation has failed. This	 * indicates that we have a Pro 4 or Book 1 and this driver should not	 * be used.	 */	if (oem_platform_rev == 0)		return -ENODEV; 	dev_dbg(dev, "OEM Platform Revision %llu\n", oem_platform_rev); 	return 0;} /* * Button infos for Microsoft Surface Book 2 and Surface Pro (2017). * Obtained from DSDT/testing. */static const struct soc_button_info soc_button_MSHW0040[] = {	{ "power", 0, EV_KEY, KEY_POWER, false, true, true },	{ "volume_up", 2, EV_KEY, KEY_VOLUMEUP, true, false, true },	{ "volume_down", 4, EV_KEY, KEY_VOLUMEDOWN, true, false, true },	{ }}; static const struct soc_device_data soc_device_MSHW0040 = {	.button_info = soc_button_MSHW0040,	.check = soc_device_check_MSHW0040,}; static const struct acpi_device_id soc_button_acpi_match[] = {	{ "PNP0C40", (unsigned long)&soc_device_PNP0C40 },	{ "INT33D3", (unsigned long)&soc_device_INT33D3 },	{ "ID9001", (unsigned long)&soc_device_INT33D3 },	{ "ACPI0011", 0 }, 	/* Microsoft Surface Devices (3th, 5th and 6th generation) */	{ "MSHW0028", (unsigned long)&soc_device_MSHW0028 },	{ "MSHW0040", (unsigned long)&soc_device_MSHW0040 }, 	{ }}; MODULE_DEVICE_TABLE(acpi, soc_button_acpi_match); static struct platform_driver soc_button_driver = {	.probe          = soc_button_probe,	.remove		= soc_button_remove,	.driver		= {		.name = KBUILD_MODNAME,		.acpi_match_table = ACPI_PTR(soc_button_acpi_match),	},};module_platform_driver(soc_button_driver); MODULE_DESCRIPTION("Windows-compatible SoC Button Array driver");MODULE_LICENSE("GPL");

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