Merge branch 'i2c/for-mergewindow' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c updates from Wolfram Sang:

 - big refactoring of the PASEMI driver to support the Apple M1

 - huge improvements to the XIIC in terms of locking and SMP safety

 - refactoring and clean ups for the i801 driver

... and the usual bunch of small driver updates

* 'i2c/for-mergewindow' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (43 commits)
  i2c: amd-mp2-plat: ACPI: Use ACPI_COMPANION() directly
  i2c: i801: Add support for Intel Ice Lake PCH-N
  i2c: virtio: update the maintainer to Conghui
  i2c: xlr: Fix a resource leak in the error handling path of 'xlr_i2c_probe()'
  i2c: qup: move to use request_irq by IRQF_NO_AUTOEN flag
  i2c: qup: fix a trivial typo
  i2c: tegra: Ensure that device is suspended before driver is removed
  i2c: i801: Fix incorrect and needless software PEC disabling
  i2c: mediatek: Dump i2c/dma register when a timeout occurs
  i2c: mediatek: Reset the handshake signal between i2c and dma
  i2c: mlxcpld: Allow flexible polling time setting for I2C transactions
  i2c: pasemi: Set enable bit for Apple variant
  i2c: pasemi: Add Apple platform driver
  i2c: pasemi: Refactor _probe to use devm_*
  i2c: pasemi: Allow to configure bus frequency
  i2c: pasemi: Move common reset code to own function
  i2c: pasemi: Split pci driver to its own file
  i2c: pasemi: Split off common probing code
  i2c: pasemi: Remove usage of pci_dev
  i2c: pasemi: Use dev_name instead of port number
  ...

20 files changed, 490 insertions, 260 deletions

diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index e17790fe35a7..dce392839017 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -615,7 +615,10 @@ config I2C_EXYNOS5
 	depends on ARCH_EXYNOS || COMPILE_TEST
 	default y if ARCH_EXYNOS
 	help
-	  High-speed I2C controller on Exynos5 and newer Samsung SoCs.
+	  High-speed I2C controller on Samsung Exynos5 and newer Samsung SoCs:
+	  Exynos5250, Exynos5260, Exynos5410, Exynos542x, Exynos5800,
+	  Exynos5433 and Exynos7.
+	  Choose Y here only if you build for such Samsung SoC.
 
 config I2C_GPIO
 	tristate "GPIO-based bitbanging I2C"
@@ -856,6 +859,17 @@ config I2C_PASEMI
 	help
 	  Supports the PA Semi PWRficient on-chip SMBus interfaces.
 
+config I2C_APPLE
+	tristate "Apple SMBus platform driver"
+	depends on ARCH_APPLE || COMPILE_TEST
+	default ARCH_APPLE
+	help
+	  Say Y here if you want to use the I2C controller present on Apple
+	  Silicon chips such as the M1.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called i2c-apple.
+
 config I2C_PCA_PLATFORM
 	tristate "PCA9564/PCA9665 as platform device"
 	select I2C_ALGOPCA
diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile
index 1336b04f40e2..d85899fef8c7 100644
--- a/drivers/i2c/busses/Makefile
+++ b/drivers/i2c/busses/Makefile
@@ -84,7 +84,10 @@ obj-$(CONFIG_I2C_NPCM7XX)	+= i2c-npcm7xx.o
 obj-$(CONFIG_I2C_OCORES)	+= i2c-ocores.o
 obj-$(CONFIG_I2C_OMAP)		+= i2c-omap.o
 obj-$(CONFIG_I2C_OWL)		+= i2c-owl.o
+i2c-pasemi-objs := i2c-pasemi-core.o i2c-pasemi-pci.o
 obj-$(CONFIG_I2C_PASEMI)	+= i2c-pasemi.o
+i2c-apple-objs := i2c-pasemi-core.o i2c-pasemi-platform.o
+obj-$(CONFIG_I2C_APPLE)	+= i2c-apple.o
 obj-$(CONFIG_I2C_PCA_PLATFORM)	+= i2c-pca-platform.o
 obj-$(CONFIG_I2C_PNX)		+= i2c-pnx.o
 obj-$(CONFIG_I2C_PXA)		+= i2c-pxa.o
diff --git a/drivers/i2c/busses/i2c-amd-mp2-pci.c b/drivers/i2c/busses/i2c-amd-mp2-pci.c
index ce130a821ea5..adf0e8c1ec01 100644
--- a/drivers/i2c/busses/i2c-amd-mp2-pci.c
+++ b/drivers/i2c/busses/i2c-amd-mp2-pci.c
@@ -307,9 +307,9 @@ static int amd_mp2_pci_init(struct amd_mp2_dev *privdata,
 
 	pci_set_master(pci_dev);
 
-	rc = pci_set_dma_mask(pci_dev, DMA_BIT_MASK(64));
+	rc = dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(64));
 	if (rc) {
-		rc = pci_set_dma_mask(pci_dev, DMA_BIT_MASK(32));
+		rc = dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32));
 		if (rc)
 			goto err_dma_mask;
 	}
diff --git a/drivers/i2c/busses/i2c-amd-mp2-plat.c b/drivers/i2c/busses/i2c-amd-mp2-plat.c
index de058671f9b8..84b7e6cbc67b 100644
--- a/drivers/i2c/busses/i2c-amd-mp2-plat.c
+++ b/drivers/i2c/busses/i2c-amd-mp2-plat.c
@@ -246,12 +246,11 @@ static int i2c_amd_probe(struct platform_device *pdev)
 {
 	int ret;
 	struct amd_i2c_dev *i2c_dev;
-	acpi_handle handle = ACPI_HANDLE(&pdev->dev);
-	struct acpi_device *adev;
+	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
 	struct amd_mp2_dev *mp2_dev;
 	const char *uid;
 
-	if (acpi_bus_get_device(handle, &adev))
+	if (!adev)
 		return -ENODEV;
 
 	/* The ACPI namespace doesn't contain information about which MP2 PCI
diff --git a/drivers/i2c/busses/i2c-bcm-kona.c b/drivers/i2c/busses/i2c-bcm-kona.c
index ed5e1275ae46..8e350f20cde0 100644
--- a/drivers/i2c/busses/i2c-bcm-kona.c
+++ b/drivers/i2c/busses/i2c-bcm-kona.c
@@ -763,7 +763,7 @@ static int bcm_kona_i2c_probe(struct platform_device *pdev)
 	/* Map hardware registers */
 	dev->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(dev->base))
-		return -ENOMEM;
+		return PTR_ERR(dev->base);
 
 	/* Get and enable external clock */
 	dev->external_clk = devm_clk_get(dev->device, NULL);
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 89ae78ef1a1c..05187457f88a 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -64,6 +64,7 @@
  * Cannon Lake-LP (PCH)		0x9da3	32	hard	yes	yes	yes
  * Cedar Fork (PCH)		0x18df	32	hard	yes	yes	yes
  * Ice Lake-LP (PCH)		0x34a3	32	hard	yes	yes	yes
+ * Ice Lake-N (PCH)		0x38a3	32	hard	yes	yes	yes
  * Comet Lake (PCH)		0x02a3	32	hard	yes	yes	yes
  * Comet Lake-H (PCH)		0x06a3	32	hard	yes	yes	yes
  * Elkhart Lake (PCH)		0x4b23	32	hard	yes	yes	yes
@@ -218,6 +219,7 @@
 #define PCI_DEVICE_ID_INTEL_COLETOCREEK_SMBUS		0x23b0
 #define PCI_DEVICE_ID_INTEL_GEMINILAKE_SMBUS		0x31d4
 #define PCI_DEVICE_ID_INTEL_ICELAKE_LP_SMBUS		0x34a3
+#define PCI_DEVICE_ID_INTEL_ICELAKE_N_SMBUS		0x38a3
 #define PCI_DEVICE_ID_INTEL_5_3400_SERIES_SMBUS		0x3b30
 #define PCI_DEVICE_ID_INTEL_TIGERLAKE_H_SMBUS		0x43a3
 #define PCI_DEVICE_ID_INTEL_ELKHART_LAKE_SMBUS		0x4b23
@@ -1042,6 +1044,7 @@ static const struct pci_device_id i801_ids[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CANNONLAKE_H_SMBUS) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CANNONLAKE_LP_SMBUS) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICELAKE_LP_SMBUS) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICELAKE_N_SMBUS) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COMETLAKE_SMBUS) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COMETLAKE_H_SMBUS) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COMETLAKE_V_SMBUS) },
@@ -1192,7 +1195,7 @@ static acpi_status check_acpi_smo88xx_device(acpi_handle obj_handle,
 
 	kfree(info);
 
-	*((bool *)return_value) = true;
+	*return_value = NULL;
 	return AE_CTRL_TERMINATE;
 
 smo88xx_not_found:
@@ -1202,11 +1205,9 @@ smo88xx_not_found:
 
 static bool is_dell_system_with_lis3lv02d(void)
 {
-	bool found;
-	const char *vendor;
+	void *err = ERR_PTR(-ENOENT);
 
-	vendor = dmi_get_system_info(DMI_SYS_VENDOR);
-	if (!vendor || strcmp(vendor, "Dell Inc."))
+	if (!dmi_match(DMI_SYS_VENDOR, "Dell Inc."))
 		return false;
 
 	/*
@@ -1217,11 +1218,9 @@ static bool is_dell_system_with_lis3lv02d(void)
 	 * accelerometer but unfortunately ACPI does not provide any other
 	 * information (like I2C address).
 	 */
-	found = false;
-	acpi_get_devices(NULL, check_acpi_smo88xx_device, NULL,
-			 (void **)&found);
+	acpi_get_devices(NULL, check_acpi_smo88xx_device, NULL, &err);
 
-	return found;
+	return !IS_ERR(err);
 }
 
 /*
@@ -1395,7 +1394,7 @@ static const struct dmi_system_id mux_dmi_table[] = {
 };
 
 /* Setup multiplexing if needed */
-static int i801_add_mux(struct i801_priv *priv)
+static void i801_add_mux(struct i801_priv *priv)
 {
 	struct device *dev = &priv->adapter.dev;
 	const struct i801_mux_config *mux_config;
@@ -1404,7 +1403,7 @@ static int i801_add_mux(struct i801_priv *priv)
 	int i;
 
 	if (!priv->mux_drvdata)
-		return 0;
+		return;
 	mux_config = priv->mux_drvdata;
 
 	/* Prepare the platform data */
@@ -1420,13 +1419,11 @@ static int i801_add_mux(struct i801_priv *priv)
 			      struct_size(lookup, table, mux_config->n_gpios + 1),
 			      GFP_KERNEL);
 	if (!lookup)
-		return -ENOMEM;
+		return;
 	lookup->dev_id = "i2c-mux-gpio";
-	for (i = 0; i < mux_config->n_gpios; i++) {
-		lookup->table[i] = (struct gpiod_lookup)
-			GPIO_LOOKUP(mux_config->gpio_chip,
-				    mux_config->gpios[i], "mux", 0);
-	}
+	for (i = 0; i < mux_config->n_gpios; i++)
+		lookup->table[i] = GPIO_LOOKUP(mux_config->gpio_chip,
+					       mux_config->gpios[i], "mux", 0);
 	gpiod_add_lookup_table(lookup);
 	priv->lookup = lookup;
 
@@ -1444,8 +1441,6 @@ static int i801_add_mux(struct i801_priv *priv)
 		gpiod_remove_lookup_table(lookup);
 		dev_err(dev, "Failed to register i2c-mux-gpio device\n");
 	}
-
-	return PTR_ERR_OR_ZERO(priv->mux_pdev);
 }
 
 static void i801_del_mux(struct i801_priv *priv)
@@ -1475,7 +1470,7 @@ static unsigned int i801_get_adapter_class(struct i801_priv *priv)
 	return class;
 }
 #else
-static inline int i801_add_mux(struct i801_priv *priv) { return 0; }
+static inline void i801_add_mux(struct i801_priv *priv) { }
 static inline void i801_del_mux(struct i801_priv *priv) { }
 
 static inline unsigned int i801_get_adapter_class(struct i801_priv *priv)
@@ -1493,7 +1488,6 @@ static struct platform_device *
 i801_add_tco_spt(struct i801_priv *priv, struct pci_dev *pci_dev,
 		 struct resource *tco_res)
 {
-	static DEFINE_MUTEX(p2sb_mutex);
 	struct resource *res;
 	unsigned int devfn;
 	u64 base64_addr;
@@ -1506,7 +1500,7 @@ i801_add_tco_spt(struct i801_priv *priv, struct pci_dev *pci_dev,
 	 * enumerated by the PCI subsystem, so we need to unhide/hide it
 	 * to lookup the P2SB BAR.
 	 */
-	mutex_lock(&p2sb_mutex);
+	pci_lock_rescan_remove();
 
 	devfn = PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 1);
 
@@ -1524,7 +1518,7 @@ i801_add_tco_spt(struct i801_priv *priv, struct pci_dev *pci_dev,
 	/* Hide the P2SB device, if it was hidden before */
 	if (hidden)
 		pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, hidden);
-	mutex_unlock(&p2sb_mutex);
+	pci_unlock_rescan_remove();
 
 	res = &tco_res[1];
 	if (pci_dev->device == PCI_DEVICE_ID_INTEL_DNV_SMBUS)
@@ -1624,7 +1618,7 @@ i801_acpi_io_handler(u32 function, acpi_physical_address address, u32 bits,
 		 * BIOS is accessing the host controller so prevent it from
 		 * suspending automatically from now on.
 		 */
-		pm_runtime_set_autosuspend_delay(&pdev->dev, -1);
+		pm_runtime_get_sync(&pdev->dev);
 	}
 
 	if ((function & ACPI_IO_MASK) == ACPI_READ)
@@ -1639,31 +1633,22 @@ i801_acpi_io_handler(u32 function, acpi_physical_address address, u32 bits,
 
 static int i801_acpi_probe(struct i801_priv *priv)
 {
-	struct acpi_device *adev;
+	acpi_handle ah = ACPI_HANDLE(&priv->pci_dev->dev);
 	acpi_status status;
 
-	adev = ACPI_COMPANION(&priv->pci_dev->dev);
-	if (adev) {
-		status = acpi_install_address_space_handler(adev->handle,
-				ACPI_ADR_SPACE_SYSTEM_IO, i801_acpi_io_handler,
-				NULL, priv);
-		if (ACPI_SUCCESS(status))
-			return 0;
-	}
+	status = acpi_install_address_space_handler(ah, ACPI_ADR_SPACE_SYSTEM_IO,
+						    i801_acpi_io_handler, NULL, priv);
+	if (ACPI_SUCCESS(status))
+		return 0;
 
 	return acpi_check_resource_conflict(&priv->pci_dev->resource[SMBBAR]);
 }
 
 static void i801_acpi_remove(struct i801_priv *priv)
 {
-	struct acpi_device *adev;
+	acpi_handle ah = ACPI_HANDLE(&priv->pci_dev->dev);
 
-	adev = ACPI_COMPANION(&priv->pci_dev->dev);
-	if (!adev)
-		return;
-
-	acpi_remove_address_space_handler(adev->handle,
-		ACPI_ADR_SPACE_SYSTEM_IO, i801_acpi_io_handler);
+	acpi_remove_address_space_handler(ah, ACPI_ADR_SPACE_SYSTEM_IO, i801_acpi_io_handler);
 }
 #else
 static inline int i801_acpi_probe(struct i801_priv *priv) { return 0; }
@@ -1675,7 +1660,6 @@ static void i801_setup_hstcfg(struct i801_priv *priv)
 	unsigned char hstcfg = priv->original_hstcfg;
 
 	hstcfg &= ~SMBHSTCFG_I2C_EN;	/* SMBus timing */
-	hstcfg &= ~SMBHSTCNT_PEC_EN;	/* Disable software PEC */
 	hstcfg |= SMBHSTCFG_HST_EN;
 	pci_write_config_byte(priv->pci_dev, SMBHSTCFG, hstcfg);
 }
@@ -1720,6 +1704,7 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
 	case PCI_DEVICE_ID_INTEL_CANNONLAKE_LP_SMBUS:
 	case PCI_DEVICE_ID_INTEL_CDF_SMBUS:
 	case PCI_DEVICE_ID_INTEL_ICELAKE_LP_SMBUS:
+	case PCI_DEVICE_ID_INTEL_ICELAKE_N_SMBUS:
 	case PCI_DEVICE_ID_INTEL_COMETLAKE_SMBUS:
 	case PCI_DEVICE_ID_INTEL_COMETLAKE_H_SMBUS:
 	case PCI_DEVICE_ID_INTEL_ELKHART_LAKE_SMBUS:
@@ -1831,19 +1816,12 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
 		priv->features &= ~FEATURE_IRQ;
 
 	if (priv->features & FEATURE_IRQ) {
-		u16 pcictl, pcists;
+		u16 pcists;
 
 		/* Complain if an interrupt is already pending */
 		pci_read_config_word(priv->pci_dev, PCI_STATUS, &pcists);
 		if (pcists & PCI_STATUS_INTERRUPT)
 			dev_warn(&dev->dev, "An interrupt is pending!\n");
-
-		/* Check if interrupts have been disabled */
-		pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pcictl);
-		if (pcictl & PCI_COMMAND_INTX_DISABLE) {
-			dev_info(&dev->dev, "Interrupts are disabled\n");
-			priv->features &= ~FEATURE_IRQ;
-		}
 	}
 
 	if (priv->features & FEATURE_IRQ) {
@@ -1891,9 +1869,6 @@ static void i801_remove(struct pci_dev *dev)
 {
 	struct i801_priv *priv = pci_get_drvdata(dev);
 
-	pm_runtime_forbid(&dev->dev);
-	pm_runtime_get_noresume(&dev->dev);
-
 	i801_disable_host_notify(priv);
 	i801_del_mux(priv);
 	i2c_del_adapter(&priv->adapter);
@@ -1902,6 +1877,10 @@ static void i801_remove(struct pci_dev *dev)
 
 	platform_device_unregister(priv->tco_pdev);
 
+	/* if acpi_reserved is set then usage_count is incremented already */
+	if (!priv->acpi_reserved)
+		pm_runtime_get_noresume(&dev->dev);
+
 	/*
 	 * do not call pci_disable_device(dev) since it can cause hard hangs on
 	 * some systems during power-off (eg. Fujitsu-Siemens Lifebook E8010)
diff --git a/drivers/i2c/busses/i2c-ismt.c b/drivers/i2c/busses/i2c-ismt.c
index a6187cbec2c9..f4820fd3dc13 100644
--- a/drivers/i2c/busses/i2c-ismt.c
+++ b/drivers/i2c/busses/i2c-ismt.c
@@ -918,13 +918,11 @@ ismt_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		return -ENODEV;
 	}
 
-	if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) ||
-	    (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0)) {
-		if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
-		    (pci_set_consistent_dma_mask(pdev,
-						 DMA_BIT_MASK(32)) != 0)) {
-			dev_err(&pdev->dev, "pci_set_dma_mask fail %p\n",
-				pdev);
+	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	if (err) {
+		err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+		if (err) {
+			dev_err(&pdev->dev, "dma_set_mask fail\n");
 			return -ENODEV;
 		}
 	}
diff --git a/drivers/i2c/busses/i2c-kempld.c b/drivers/i2c/busses/i2c-kempld.c
index 2d60be086b1a..5bbb7f0d7852 100644
--- a/drivers/i2c/busses/i2c-kempld.c
+++ b/drivers/i2c/busses/i2c-kempld.c
@@ -283,7 +283,8 @@ static const struct i2c_algorithm kempld_i2c_algorithm = {
 static const struct i2c_adapter kempld_i2c_adapter = {
 	.owner		= THIS_MODULE,
 	.name		= "i2c-kempld",
-	.class		= I2C_CLASS_HWMON | I2C_CLASS_SPD,
+	.class		= I2C_CLASS_HWMON | I2C_CLASS_SPD |
+			  I2C_CLASS_DEPRECATED,
 	.algo		= &kempld_i2c_algorithm,
 };
 
diff --git a/drivers/i2c/busses/i2c-mlxcpld.c b/drivers/i2c/busses/i2c-mlxcpld.c
index 015e11c4663f..56aa424fd71d 100644
--- a/drivers/i2c/busses/i2c-mlxcpld.c
+++ b/drivers/i2c/busses/i2c-mlxcpld.c
@@ -27,7 +27,7 @@
 #define MLXCPLD_I2C_MAX_ADDR_LEN	4
 #define MLXCPLD_I2C_RETR_NUM		2
 #define MLXCPLD_I2C_XFER_TO		500000 /* usec */
-#define MLXCPLD_I2C_POLL_TIME		400   /* usec */
+#define MLXCPLD_I2C_POLL_TIME		200   /* usec */
 
 /* LPC I2C registers */
 #define MLXCPLD_LPCI2C_CPBLTY_REG	0x0
@@ -73,6 +73,7 @@ struct mlxcpld_i2c_priv {
 	struct  mlxcpld_i2c_curr_xfer xfer;
 	struct device *dev;
 	bool smbus_block;
+	int polling_time;
 };
 
 static void mlxcpld_i2c_lpc_write_buf(u8 *data, u8 len, u32 addr)
@@ -267,8 +268,8 @@ static int mlxcpld_i2c_wait_for_free(struct mlxcpld_i2c_priv *priv)
 	do {
 		if (!mlxcpld_i2c_check_busy(priv))
 			break;
-		usleep_range(MLXCPLD_I2C_POLL_TIME / 2, MLXCPLD_I2C_POLL_TIME);
-		timeout += MLXCPLD_I2C_POLL_TIME;
+		usleep_range(priv->polling_time / 2, priv->polling_time);
+		timeout += priv->polling_time;
 	} while (timeout <= MLXCPLD_I2C_XFER_TO);
 
 	if (timeout > MLXCPLD_I2C_XFER_TO)
@@ -288,10 +289,10 @@ static int mlxcpld_i2c_wait_for_tc(struct mlxcpld_i2c_priv *priv)
 	u8 datalen, val;
 
 	do {
-		usleep_range(MLXCPLD_I2C_POLL_TIME / 2, MLXCPLD_I2C_POLL_TIME);
+		usleep_range(priv->polling_time / 2, priv->polling_time);
 		if (!mlxcpld_i2c_check_status(priv, &status))
 			break;
-		timeout += MLXCPLD_I2C_POLL_TIME;
+		timeout += priv->polling_time;
 	} while (status == 0 && timeout < MLXCPLD_I2C_XFER_TO);
 
 	switch (status) {
@@ -498,9 +499,11 @@ mlxcpld_i2c_set_frequency(struct mlxcpld_i2c_priv *priv,
 	switch ((regval & data->mask) >> data->bit) {
 	case MLXCPLD_I2C_FREQ_1000KHZ:
 		freq = MLXCPLD_I2C_FREQ_1000KHZ_SET;
+		priv->polling_time /= 4;
 		break;
 	case MLXCPLD_I2C_FREQ_400KHZ:
 		freq = MLXCPLD_I2C_FREQ_400KHZ_SET;
+		priv->polling_time /= 4;
 		break;
 	default:
 		return 0;
@@ -527,6 +530,7 @@ static int mlxcpld_i2c_probe(struct platform_device *pdev)
 
 	priv->dev = &pdev->dev;
 	priv->base_addr = MLXPLAT_CPLD_LPC_I2C_BASE_ADDR;
+	priv->polling_time = MLXCPLD_I2C_POLL_TIME;
 
 	/* Set I2C bus frequency if platform data provides this info. */
 	pdata = dev_get_platdata(&pdev->dev);
diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index 7d4b3eb7077a..9ea427f53083 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -15,6 +15,7 @@
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
+#include <linux/iopoll.h>
 #include <linux/kernel.h>
 #include <linux/mm.h>
 #include <linux/module.h>
@@ -49,6 +50,8 @@
 #define I2C_RD_TRANAC_VALUE		0x0001
 #define I2C_SCL_MIS_COMP_VALUE		0x0000
 #define I2C_CHN_CLR_FLAG		0x0000
+#define I2C_RELIABILITY		0x0010
+#define I2C_DMAACK_ENABLE		0x0008
 
 #define I2C_DMA_CON_TX			0x0000
 #define I2C_DMA_CON_RX			0x0001
@@ -127,6 +130,7 @@ enum I2C_REGS_OFFSET {
 	OFFSET_HS,
 	OFFSET_SOFTRESET,
 	OFFSET_DCM_EN,
+	OFFSET_MULTI_DMA,
 	OFFSET_PATH_DIR,
 	OFFSET_DEBUGSTAT,
 	OFFSET_DEBUGCTRL,
@@ -194,8 +198,9 @@ static const u16 mt_i2c_regs_v2[] = {
 	[OFFSET_TRANSFER_LEN_AUX] = 0x44,
 	[OFFSET_CLOCK_DIV] = 0x48,
 	[OFFSET_SOFTRESET] = 0x50,
+	[OFFSET_MULTI_DMA] = 0x8c,
 	[OFFSET_SCL_MIS_COMP_POINT] = 0x90,
-	[OFFSET_DEBUGSTAT] = 0xe0,
+	[OFFSET_DEBUGSTAT] = 0xe4,
 	[OFFSET_DEBUGCTRL] = 0xe8,
 	[OFFSET_FIFO_STAT] = 0xf4,
 	[OFFSET_FIFO_THRESH] = 0xf8,
@@ -842,6 +847,57 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
 	return 0;
 }
 
+static void i2c_dump_register(struct mtk_i2c *i2c)
+{
+	dev_dbg(i2c->dev, "SLAVE_ADDR: 0x%x, INTR_MASK: 0x%x\n",
+		mtk_i2c_readw(i2c, OFFSET_SLAVE_ADDR),
+		mtk_i2c_readw(i2c, OFFSET_INTR_MASK));
+	dev_dbg(i2c->dev, "INTR_STAT: 0x%x, CONTROL: 0x%x\n",
+		mtk_i2c_readw(i2c, OFFSET_INTR_STAT),
+		mtk_i2c_readw(i2c, OFFSET_CONTROL));
+	dev_dbg(i2c->dev, "TRANSFER_LEN: 0x%x, TRANSAC_LEN: 0x%x\n",
+		mtk_i2c_readw(i2c, OFFSET_TRANSFER_LEN),
+		mtk_i2c_readw(i2c, OFFSET_TRANSAC_LEN));
+	dev_dbg(i2c->dev, "DELAY_LEN: 0x%x, HTIMING: 0x%x\n",
+		mtk_i2c_readw(i2c, OFFSET_DELAY_LEN),
+		mtk_i2c_readw(i2c, OFFSET_TIMING));
+	dev_dbg(i2c->dev, "START: 0x%x, EXT_CONF: 0x%x\n",
+		mtk_i2c_readw(i2c, OFFSET_START),
+		mtk_i2c_readw(i2c, OFFSET_EXT_CONF));
+	dev_dbg(i2c->dev, "HS: 0x%x, IO_CONFIG: 0x%x\n",
+		mtk_i2c_readw(i2c, OFFSET_HS),
+		mtk_i2c_readw(i2c, OFFSET_IO_CONFIG));
+	dev_dbg(i2c->dev, "DCM_EN: 0x%x, TRANSFER_LEN_AUX: 0x%x\n",
+		mtk_i2c_readw(i2c, OFFSET_DCM_EN),
+		mtk_i2c_readw(i2c, OFFSET_TRANSFER_LEN_AUX));
+	dev_dbg(i2c->dev, "CLOCK_DIV: 0x%x, FIFO_STAT: 0x%x\n",
+		mtk_i2c_readw(i2c, OFFSET_CLOCK_DIV),
+		mtk_i2c_readw(i2c, OFFSET_FIFO_STAT));
+	dev_dbg(i2c->dev, "DEBUGCTRL : 0x%x, DEBUGSTAT: 0x%x\n",
+		mtk_i2c_readw(i2c, OFFSET_DEBUGCTRL),
+		mtk_i2c_readw(i2c, OFFSET_DEBUGSTAT));
+	if (i2c->dev_comp->regs == mt_i2c_regs_v2) {
+		dev_dbg(i2c->dev, "LTIMING: 0x%x, MULTI_DMA: 0x%x\n",
+			mtk_i2c_readw(i2c, OFFSET_LTIMING),
+			mtk_i2c_readw(i2c, OFFSET_MULTI_DMA));
+	}
+	dev_dbg(i2c->dev, "\nDMA_INT_FLAG: 0x%x, DMA_INT_EN: 0x%x\n",
+		readl(i2c->pdmabase + OFFSET_INT_FLAG),
+		readl(i2c->pdmabase + OFFSET_INT_EN));
+	dev_dbg(i2c->dev, "DMA_EN: 0x%x, DMA_CON: 0x%x\n",
+		readl(i2c->pdmabase + OFFSET_EN),
+		readl(i2c->pdmabase + OFFSET_CON));
+	dev_dbg(i2c->dev, "DMA_TX_MEM_ADDR: 0x%x, DMA_RX_MEM_ADDR: 0x%x\n",
+		readl(i2c->pdmabase + OFFSET_TX_MEM_ADDR),
+		readl(i2c->pdmabase + OFFSET_RX_MEM_ADDR));
+	dev_dbg(i2c->dev, "DMA_TX_LEN: 0x%x, DMA_RX_LEN: 0x%x\n",
+		readl(i2c->pdmabase + OFFSET_TX_LEN),
+		readl(i2c->pdmabase + OFFSET_RX_LEN));
+	dev_dbg(i2c->dev, "DMA_TX_4G_MODE: 0x%x, DMA_RX_4G_MODE: 0x%x",
+		readl(i2c->pdmabase + OFFSET_TX_4G_MODE),
+		readl(i2c->pdmabase + OFFSET_RX_4G_MODE));
+}
+
 static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 			       int num, int left_num)
 {
@@ -851,6 +907,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 	u16 restart_flag = 0;
 	u16 dma_sync = 0;
 	u32 reg_4g_mode;
+	u32 reg_dma_reset;
 	u8 *dma_rd_buf = NULL;
 	u8 *dma_wr_buf = NULL;
 	dma_addr_t rpaddr = 0;
@@ -864,6 +921,28 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 
 	reinit_completion(&i2c->msg_complete);
 
+	if (i2c->dev_comp->apdma_sync &&
+	    i2c->op != I2C_MASTER_WRRD && num > 1) {
+		mtk_i2c_writew(i2c, 0x00, OFFSET_DEBUGCTRL);
+		writel(I2C_DMA_HANDSHAKE_RST | I2C_DMA_WARM_RST,
+		       i2c->pdmabase + OFFSET_RST);
+
+		ret = readw_poll_timeout(i2c->pdmabase + OFFSET_RST,
+					 reg_dma_reset,
+					 !(reg_dma_reset & I2C_DMA_WARM_RST),
+					 0, 100);
+		if (ret) {
+			dev_err(i2c->dev, "DMA warm reset timeout\n");
+			return -ETIMEDOUT;
+		}
+
+		writel(I2C_DMA_CLR_FLAG, i2c->pdmabase + OFFSET_RST);
+		mtk_i2c_writew(i2c, I2C_HANDSHAKE_RST, OFFSET_SOFTRESET);
+		mtk_i2c_writew(i2c, I2C_CHN_CLR_FLAG, OFFSET_SOFTRESET);
+		mtk_i2c_writew(i2c, I2C_RELIABILITY | I2C_DMAACK_ENABLE,
+			       OFFSET_DEBUGCTRL);
+	}
+
 	control_reg = mtk_i2c_readw(i2c, OFFSET_CONTROL) &
 			~(I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS);
 	if ((i2c->speed_hz > I2C_MAX_FAST_MODE_PLUS_FREQ) || (left_num >= 1))
@@ -1049,6 +1128,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 
 	if (ret == 0) {
 		dev_dbg(i2c->dev, "addr: %x, transfer timeout\n", msgs->addr);
+		i2c_dump_register(i2c);
 		mtk_i2c_init_hw(i2c);
 		return -ETIMEDOUT;
 	}
diff --git a/drivers/i2c/busses/i2c-pasemi.c b/drivers/i2c/busses/i2c-pasemi-core.c
index 20f2772c0e79..4e161a4089d8 100644
--- a/drivers/i2c/busses/i2c-pasemi.c
+++ b/drivers/i2c/busses/i2c-pasemi-core.c
@@ -15,20 +15,14 @@
 #include <linux/slab.h>
 #include <linux/io.h>
 
-static struct pci_driver pasemi_smb_driver;
-
-struct pasemi_smbus {
-	struct pci_dev		*dev;
-	struct i2c_adapter	 adapter;
-	unsigned long		 base;
-	int			 size;
-};
+#include "i2c-pasemi-core.h"
 
 /* Register offsets */
 #define REG_MTXFIFO	0x00
 #define REG_MRXFIFO	0x04
 #define REG_SMSTA	0x14
 #define REG_CTL		0x1c
+#define REG_REV		0x28
 
 /* Register defs */
 #define MTXFIFO_READ	0x00000400
@@ -44,30 +38,36 @@ struct pasemi_smbus {
 
 #define CTL_MRR		0x00000400
 #define CTL_MTR		0x00000200
+#define CTL_EN		0x00000800
 #define CTL_CLK_M	0x000000ff
 
-#define CLK_100K_DIV	84
-#define CLK_400K_DIV	21
-
 static inline void reg_write(struct pasemi_smbus *smbus, int reg, int val)
 {
-	dev_dbg(&smbus->dev->dev, "smbus write reg %lx val %08x\n",
-		smbus->base + reg, val);
-	outl(val, smbus->base + reg);
+	dev_dbg(smbus->dev, "smbus write reg %x val %08x\n", reg, val);
+	iowrite32(val, smbus->ioaddr + reg);
 }
 
 static inline int reg_read(struct pasemi_smbus *smbus, int reg)
 {
 	int ret;
-	ret = inl(smbus->base + reg);
-	dev_dbg(&smbus->dev->dev, "smbus read reg %lx val %08x\n",
-		smbus->base + reg, ret);
+	ret = ioread32(smbus->ioaddr + reg);
+	dev_dbg(smbus->dev, "smbus read reg %x val %08x\n", reg, ret);
 	return ret;
 }
 
 #define TXFIFO_WR(smbus, reg)	reg_write((smbus), REG_MTXFIFO, (reg))
 #define RXFIFO_RD(smbus)	reg_read((smbus), REG_MRXFIFO)
 
+static void pasemi_reset(struct pasemi_smbus *smbus)
+{
+	u32 val = (CTL_MTR | CTL_MRR | (smbus->clk_div & CTL_CLK_M));
+
+	if (smbus->hw_rev >= 6)
+		val |= CTL_EN;
+
+	reg_write(smbus, REG_CTL, val);
+}
+
 static void pasemi_smb_clear(struct pasemi_smbus *smbus)
 {
 	unsigned int status;
@@ -93,7 +93,7 @@ static int pasemi_smb_waitready(struct pasemi_smbus *smbus)
 		return -ENXIO;
 
 	if (timeout < 0) {
-		dev_warn(&smbus->dev->dev, "Timeout, status 0x%08x\n", status);
+		dev_warn(smbus->dev, "Timeout, status 0x%08x\n", status);
 		reg_write(smbus, REG_SMSTA, status);
 		return -ETIME;
 	}
@@ -142,8 +142,7 @@ static int pasemi_i2c_xfer_msg(struct i2c_adapter *adapter,
 	return 0;
 
  reset_out:
-	reg_write(smbus, REG_CTL, (CTL_MTR | CTL_MRR |
-		  (CLK_100K_DIV & CTL_CLK_M)));
+	pasemi_reset(smbus);
 	return err;
 }
 
@@ -309,8 +308,7 @@ static int pasemi_smb_xfer(struct i2c_adapter *adapter,
 	return 0;
 
  reset_out:
-	reg_write(smbus, REG_CTL, (CTL_MTR | CTL_MRR |
-		  (CLK_100K_DIV & CTL_CLK_M)));
+	pasemi_reset(smbus);
 	return err;
 }
 
@@ -328,82 +326,28 @@ static const struct i2c_algorithm smbus_algorithm = {
 	.functionality	= pasemi_smb_func,
 };
 
-static int pasemi_smb_probe(struct pci_dev *dev,
-				      const struct pci_device_id *id)
+int pasemi_i2c_common_probe(struct pasemi_smbus *smbus)
 {
-	struct pasemi_smbus *smbus;
 	int error;
 
-	if (!(pci_resource_flags(dev, 0) & IORESOURCE_IO))
-		return -ENODEV;
-
-	smbus = kzalloc(sizeof(struct pasemi_smbus), GFP_KERNEL);
-	if (!smbus)
-		return -ENOMEM;
-
-	smbus->dev = dev;
-	smbus->base = pci_resource_start(dev, 0);
-	smbus->size = pci_resource_len(dev, 0);
-
-	if (!request_region(smbus->base, smbus->size,
-			    pasemi_smb_driver.name)) {
-		error = -EBUSY;
-		goto out_kfree;
-	}
-
 	smbus->adapter.owner = THIS_MODULE;
 	snprintf(smbus->adapter.name, sizeof(smbus->adapter.name),
-		 "PA Semi SMBus adapter at 0x%lx", smbus->base);
+		 "PA Semi SMBus adapter (%s)", dev_name(smbus->dev));
 	smbus->adapter.class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
 	smbus->adapter.algo = &smbus_algorithm;
 	smbus->adapter.algo_data = smbus;
 
 	/* set up the sysfs linkage to our parent device */
-	smbus->adapter.dev.parent = &dev->dev;
+	smbus->adapter.dev.parent = smbus->dev;
 
-	reg_write(smbus, REG_CTL, (CTL_MTR | CTL_MRR |
-		  (CLK_100K_DIV & CTL_CLK_M)));
+	if (smbus->hw_rev != PASEMI_HW_REV_PCI)
+		smbus->hw_rev = reg_read(smbus, REG_REV);
 
-	error = i2c_add_adapter(&smbus->adapter);
-	if (error)
-		goto out_release_region;
+	pasemi_reset(smbus);
 
-	pci_set_drvdata(dev, smbus);
+	error = devm_i2c_add_adapter(smbus->dev, &smbus->adapter);
+	if (error)
+		return error;
 
 	return 0;
-
- out_release_region:
-	release_region(smbus->base, smbus->size);
- out_kfree:
-	kfree(smbus);
-	return error;
 }
-
-static void pasemi_smb_remove(struct pci_dev *dev)
-{
-	struct pasemi_smbus *smbus = pci_get_drvdata(dev);
-
-	i2c_del_adapter(&smbus->adapter);
-	release_region(smbus->base, smbus->size);
-	kfree(smbus);
-}
-
-static const struct pci_device_id pasemi_smb_ids[] = {
-	{ PCI_DEVICE(0x1959, 0xa003) },
-	{ 0, }
-};
-
-MODULE_DEVICE_TABLE(pci, pasemi_smb_ids);
-
-static struct pci_driver pasemi_smb_driver = {
-	.name		= "i2c-pasemi",
-	.id_table	= pasemi_smb_ids,
-	.probe		= pasemi_smb_probe,
-	.remove		= pasemi_smb_remove,
-};
-
-module_pci_driver(pasemi_smb_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
-MODULE_DESCRIPTION("PA Semi PWRficient SMBus driver");
diff --git a/drivers/i2c/busses/i2c-pasemi-core.h b/drivers/i2c/busses/i2c-pasemi-core.h
new file mode 100644
index 000000000000..4655124a37f3
--- /dev/null
+++ b/drivers/i2c/busses/i2c-pasemi-core.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/atomic.h>
+#include <linux/clk.h>
+#include <linux/de