Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

Pull input updates from Dmitry Torokhov:

 - input core allows hardware drivers to specify a [more precise]
   timestamp (normally taken in top half) to better track velocity of
   contacts

 - input_dev instances now support "polling" mode so that drivers could
   use the same object for polled and interrupt-driven operation. The
   plan is to convert existing drivers and retire input_polled_dev API

 - a new driver for the FlySky FS-iA6B RC receiver

 - a refresh of BU21013 touchpad driver

 - w90x900 keyboard and touchpad drivers are removed as the platform is
   gone

 - assorted fixes

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (45 commits)
  Input: sidewinder - make array seq static const, makes object smaller
  Input: reset device timestamp on sync
  Input: bu21013_ts - switch to using standard touchscreen properties
  Input: bu21013_ts - switch to using MT-B (slotted) protocol
  Input: bu21013_ts - fix suspend when wake source
  Input: bu21013_ts - use interrupt from I2C client
  Input: bu21013_ts - remove support for platform data
  Input: bu21013_ts - convert to using managed resources
  Input: bu21013_ts - remove useless comments
  Input: bu21013_ts - annotate supend/resume methods as __maybe_unused
  Input: bu21013_ts - rename some variables
  Input: bu21013_ts - convert to use GPIO descriptors
  ARM: ux500: improve BU21013 touchpad bindings
  Input: i8042 - enable wakeup on a stable struct device
  Input: soc_button_array - use platform_device_register_resndata()
  Input: psmouse - drop all unneeded functions from mouse headers
  Input: add support for polling to input devices
  Input: wacom_w8001 - allocate additional space for 'phys'
  Input: cros_ec_keyb - add back missing mask for event_type
  Input: remove dev_err() usage after platform_get_irq()
  ...

1 files changed, 101 insertions, 26 deletions

diff --git a/drivers/input/misc/soc_button_array.c b/drivers/input/misc/soc_button_array.c
index 5e59f8e57f8e..97e3639e99d0 100644
--- a/drivers/input/misc/soc_button_array.c
+++ b/drivers/input/misc/soc_button_array.c
@@ -25,6 +25,11 @@ struct soc_button_info {
 	bool wakeup;
 };
 
+struct soc_device_data {
+	const struct soc_button_info *button_info;
+	int (*check)(struct device *dev);
+};
+
 /*
  * Some of the buttons like volume up/down are auto repeat, while others
  * are not. To support both, we register two platform devices, and put
@@ -87,8 +92,13 @@ soc_button_device_create(struct platform_device *pdev,
 			continue;
 
 		gpio = soc_button_lookup_gpio(&pdev->dev, info->acpi_index);
-		if (!gpio_is_valid(gpio))
+		if (gpio < 0 && gpio != -ENOENT) {
+			error = gpio;
+			goto err_free_mem;
+		} else if (!gpio_is_valid(gpio)) {
+			/* Skip GPIO if not present */
 			continue;
+		}
 
 		gpio_keys[n_buttons].type = info->event_type;
 		gpio_keys[n_buttons].code = info->event_code;
@@ -110,25 +120,19 @@ soc_button_device_create(struct platform_device *pdev,
 	gpio_keys_pdata->nbuttons = n_buttons;
 	gpio_keys_pdata->rep = autorepeat;
 
-	pd = platform_device_alloc("gpio-keys", PLATFORM_DEVID_AUTO);
-	if (!pd) {
-		error = -ENOMEM;
+	pd = platform_device_register_resndata(&pdev->dev, "gpio-keys",
+					       PLATFORM_DEVID_AUTO, NULL, 0,
+					       gpio_keys_pdata,
+					       sizeof(*gpio_keys_pdata));
+	error = PTR_ERR_OR_ZERO(pd);
+	if (error) {
+		dev_err(&pdev->dev,
+			"failed registering gpio-keys: %d\n", error);
 		goto err_free_mem;
 	}
 
-	error = platform_device_add_data(pd, gpio_keys_pdata,
-					 sizeof(*gpio_keys_pdata));
-	if (error)
-		goto err_free_pdev;
-
-	error = platform_device_add(pd);
-	if (error)
-		goto err_free_pdev;
-
 	return pd;
 
-err_free_pdev:
-	platform_device_put(pd);
 err_free_mem:
 	devm_kfree(&pdev->dev, gpio_keys_pdata);
 	return ERR_PTR(error);
@@ -309,23 +313,26 @@ static int soc_button_remove(struct platform_device *pdev)
 static int soc_button_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	const struct acpi_device_id *id;
-	struct soc_button_info *button_info;
+	const struct soc_device_data *device_data;
+	const struct soc_button_info *button_info;
 	struct soc_button_data *priv;
 	struct platform_device *pd;
 	int i;
 	int error;
 
-	id = acpi_match_device(dev->driver->acpi_match_table, dev);
-	if (!id)
-		return -ENODEV;
+	device_data = acpi_device_get_match_data(dev);
+	if (device_data && device_data->check) {
+		error = device_data->check(dev);
+		if (error)
+			return error;
+	}
 
-	if (!id->driver_data) {
+	if (device_data && device_data->button_info) {
+		button_info = device_data->button_info;
+	} else {
 		button_info = soc_button_get_button_info(dev);
 		if (IS_ERR(button_info))
 			return PTR_ERR(button_info);
-	} else {
-		button_info = (struct soc_button_info *)id->driver_data;
 	}
 
 	error = gpiod_count(dev, NULL);
@@ -357,7 +364,7 @@ static int soc_button_probe(struct platform_device *pdev)
 	if (!priv->children[0] && !priv->children[1])
 		return -ENODEV;
 
-	if (!id->driver_data)
+	if (!device_data || !device_data->button_info)
 		devm_kfree(dev, button_info);
 
 	return 0;
@@ -368,7 +375,7 @@ static int soc_button_probe(struct platform_device *pdev)
  * is defined in section 2.8.7.2 of "Windows ACPI Design Guide for SoC
  * Platforms"
  */
-static struct soc_button_info soc_button_PNP0C40[] = {
+static const struct soc_button_info soc_button_PNP0C40[] = {
 	{ "power", 0, EV_KEY, KEY_POWER, false, true },
 	{ "home", 1, EV_KEY, KEY_LEFTMETA, false, true },
 	{ "volume_up", 2, EV_KEY, KEY_VOLUMEUP, true, false },
@@ -377,9 +384,77 @@ static struct soc_button_info soc_button_PNP0C40[] = {
 	{ }
 };
 
+static const struct soc_device_data soc_device_PNP0C40 = {
+	.button_info = soc_button_PNP0C40,
+};
+
+/*
+ * 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 Revision
+static 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 },
+	{ "volume_up", 2, EV_KEY, KEY_VOLUMEUP, true, false },
+	{ "volume_down", 4, EV_KEY, KEY_VOLUMEDOWN, true, false },
+	{ }
+};
+
+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_button_PNP0C40 },
+	{ "PNP0C40", (unsigned long)&soc_device_PNP0C40 },
 	{ "ACPI0011", 0 },
+
+	/* Microsoft Surface Devices (5th and 6th generation) */
+	{ "MSHW0040", (unsigned long)&soc_device_MSHW0040 },
+
 	{ }
 };