Merge tag 'platform-drivers-x86-v6.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

Pull x86 platform driver updates from Hans de Goede:

 - Microsoft Surface:
     - SSAM hot unplug support
     - Surface Pro 8 keyboard cover support
     - Tablet mode switch support for Surface Pro 8 and Surface Laptop
       Studio

 - thinkpad_acpi:
     - AMD Automatice Mode Transitions (AMT) support

 - Mellanox:
     - Vulcan chassis COMe NVSwitch management support
     - XH3000 support

 - New generic/shared Intel P2SB (Primary to Sideband) support

 - Lots of small cleanups

 - Various small bugfixes

 - Various new hardware ids / quirks additions

* tag 'platform-drivers-x86-v6.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (105 commits)
  platform/x86/intel/vsec: Fix wrong type for local status variables
  platform/x86: p2sb: Move out of X86_PLATFORM_DEVICES dependency
  platform/x86: pmc_atom: Fix comment typo
  platform/surface: gpe: Add support for 13" Intel version of Surface Laptop 4
  platform/olpc: Fix uninitialized data in debugfs write
  platform/mellanox: mlxreg-lc: Fix error flow and extend verbosity
  platform/x86: pmc_atom: Match all Lex BayTrail boards with critclk_systems DMI table
  platform/x86: sony-laptop: Remove useless comparisons in sony_pic_read_possible_resource()
  tools/power/x86/intel-speed-select: Remove unneeded semicolon
  tools/power/x86/intel-speed-select: Fix off by one check
  platform/surface: tabletsw: Fix __le32 integer access
  Documentation/ABI: Add new attributes for mlxreg-io sysfs interfaces
  Documentation/ABI: mlxreg-io: Fix contact info
  platform/mellanox: mlxreg-io: Add locking for io operations
  platform/x86: mlx-platform: Add COME board revision register
  platform/x86: mlx-platform: Add support for new system XH3000
  platform/x86: mlx-platform: Introduce support for COMe NVSwitch management module for Vulcan chassis
  platform/x86: mlx-platform: Add support for systems equipped with two ASICs
  platform/x86: mlx-platform: Add cosmetic changes for alignment
  platform/x86: mlx-platform: Make activation of some drivers conditional
  ...

1 files changed, 34 insertions, 35 deletions

diff --git a/drivers/platform/x86/serial-multi-instantiate.c b/drivers/platform/x86/serial-multi-instantiate.c
index 1e8063b7c169..67feed25c9db 100644
--- a/drivers/platform/x86/serial-multi-instantiate.c
+++ b/drivers/platform/x86/serial-multi-instantiate.c
@@ -61,36 +61,35 @@ static int smi_get_irq(struct platform_device *pdev, struct acpi_device *adev,
 	default:
 		return 0;
 	}
-
 	if (ret < 0)
-		dev_err_probe(&pdev->dev, ret, "Error requesting irq at index %d: %d\n",
-			      inst->irq_idx, ret);
+		return dev_err_probe(&pdev->dev, ret, "Error requesting irq at index %d\n",
+				     inst->irq_idx);
 
 	return ret;
 }
 
 static void smi_devs_unregister(struct smi *smi)
 {
-	while (smi->i2c_num > 0)
-		i2c_unregister_device(smi->i2c_devs[--smi->i2c_num]);
+	while (smi->i2c_num--)
+		i2c_unregister_device(smi->i2c_devs[smi->i2c_num]);
 
-	while (smi->spi_num > 0)
-		spi_unregister_device(smi->spi_devs[--smi->spi_num]);
+	while (smi->spi_num--)
+		spi_unregister_device(smi->spi_devs[smi->spi_num]);
 }
 
 /**
  * smi_spi_probe - Instantiate multiple SPI devices from inst array
  * @pdev:	Platform device
- * @adev:	ACPI device
  * @smi:	Internal struct for Serial multi instantiate driver
  * @inst_array:	Array of instances to probe
  *
  * Returns the number of SPI devices instantiate, Zero if none is found or a negative error code.
  */
-static int smi_spi_probe(struct platform_device *pdev, struct acpi_device *adev, struct smi *smi,
+static int smi_spi_probe(struct platform_device *pdev, struct smi *smi,
 			 const struct smi_instance *inst_array)
 {
 	struct device *dev = &pdev->dev;
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 	struct spi_controller *ctlr;
 	struct spi_device *spi_dev;
 	char name[50];
@@ -99,8 +98,8 @@ static int smi_spi_probe(struct platform_device *pdev, struct acpi_device *adev,
 	ret = acpi_spi_count_resources(adev);
 	if (ret < 0)
 		return ret;
-	else if (!ret)
-		return -ENODEV;
+	if (!ret)
+		return -ENOENT;
 
 	count = ret;
 
@@ -112,9 +111,8 @@ static int smi_spi_probe(struct platform_device *pdev, struct acpi_device *adev,
 
 		spi_dev = acpi_spi_device_alloc(NULL, adev, i);
 		if (IS_ERR(spi_dev)) {
-			ret = PTR_ERR(spi_dev);
-			dev_err_probe(dev, ret, "failed to allocate SPI device %s from ACPI: %d\n",
-				      dev_name(&adev->dev), ret);
+			ret = dev_err_probe(dev, PTR_ERR(spi_dev), "failed to allocate SPI device %s from ACPI\n",
+					    dev_name(&adev->dev));
 			goto error;
 		}
 
@@ -135,9 +133,8 @@ static int smi_spi_probe(struct platform_device *pdev, struct acpi_device *adev,
 
 		ret = spi_add_device(spi_dev);
 		if (ret) {
-			dev_err_probe(&ctlr->dev, ret,
-				      "failed to add SPI device %s from ACPI: %d\n",
-				      dev_name(&adev->dev), ret);
+			dev_err_probe(&ctlr->dev, ret, "failed to add SPI device %s from ACPI\n",
+				      dev_name(&adev->dev));
 			spi_dev_put(spi_dev);
 			goto error;
 		}
@@ -166,25 +163,25 @@ error:
 /**
  * smi_i2c_probe - Instantiate multiple I2C devices from inst array
  * @pdev:	Platform device
- * @adev:	ACPI device
  * @smi:	Internal struct for Serial multi instantiate driver
  * @inst_array:	Array of instances to probe
  *
  * Returns the number of I2C devices instantiate, Zero if none is found or a negative error code.
  */
-static int smi_i2c_probe(struct platform_device *pdev, struct acpi_device *adev, struct smi *smi,
+static int smi_i2c_probe(struct platform_device *pdev, struct smi *smi,
 			 const struct smi_instance *inst_array)
 {
 	struct i2c_board_info board_info = {};
 	struct device *dev = &pdev->dev;
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 	char name[32];
 	int i, ret, count;
 
 	ret = i2c_acpi_client_count(adev);
 	if (ret < 0)
 		return ret;
-	else if (!ret)
-		return -ENODEV;
+	if (!ret)
+		return -ENOENT;
 
 	count = ret;
 
@@ -230,12 +227,8 @@ static int smi_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	const struct smi_node *node;
-	struct acpi_device *adev;
 	struct smi *smi;
-
-	adev = ACPI_COMPANION(dev);
-	if (!adev)
-		return -ENODEV;
+	int ret;
 
 	node = device_get_match_data(dev);
 	if (!node) {
@@ -251,19 +244,25 @@ static int smi_probe(struct platform_device *pdev)
 
 	switch (node->bus_type) {
 	case SMI_I2C:
-		return smi_i2c_probe(pdev, adev, smi, node->instances);
+		return smi_i2c_probe(pdev, smi, node->instances);
 	case SMI_SPI:
-		return smi_spi_probe(pdev, adev, smi, node->instances);
+		return smi_spi_probe(pdev, smi, node->instances);
 	case SMI_AUTO_DETECT:
-		if (i2c_acpi_client_count(adev) > 0)
-			return smi_i2c_probe(pdev, adev, smi, node->instances);
-		else
-			return smi_spi_probe(pdev, adev, smi, node->instances);
+		/*
+		 * For backwards-compatibility with the existing nodes I2C
+		 * is checked first and if such entries are found ONLY I2C
+		 * devices are created. Since some existing nodes that were
+		 * already handled by this driver could also contain unrelated
+		 * SpiSerialBus nodes that were previously ignored, and this
+		 * preserves that behavior.
+		 */
+		ret = smi_i2c_probe(pdev, smi, node->instances);
+		if (ret != -ENOENT)
+			return ret;
+		return smi_spi_probe(pdev, smi, node->instances);
 	default:
 		return -EINVAL;
 	}
-
-	return 0; /* never reached */
 }
 
 static int smi_remove(struct platform_device *pdev)
@@ -325,8 +324,8 @@ static const struct smi_node cs35l41_hda = {
 static const struct acpi_device_id smi_acpi_ids[] = {
 	{ "BSG1160", (unsigned long)&bsg1160_data },
 	{ "BSG2150", (unsigned long)&bsg2150_data },
-	{ "INT3515", (unsigned long)&int3515_data },
 	{ "CSC3551", (unsigned long)&cs35l41_hda },
+	{ "INT3515", (unsigned long)&int3515_data },
 	/* Non-conforming _HID for Cirrus Logic already released */
 	{ "CLSA0100", (unsigned long)&cs35l41_hda },
 	{ }