[PATCH v4 00/15] i2c-multi-instantiate: Adapt for INT3515 and alike

[PATCH v4 00/15] i2c-multi-instantiate: Adapt for INT3515 and alike

[Andy Shevchenko]

Currently i2c-multi-instantiate driver does not support the case
of INT3515 USB PD device, where:

- Interrupt() is used instead of GpioInt()
- All slaves may be the same from IP point of view
- There can be variadic amount of slaves

This series is addressing all above.

Note, series has been smoke tested (Heikki would do BAT or more)
on Intel Coffee Lake system.

The idea is to push this either through PDx86 tree (needs Rafael's ACKs) or ACPI.
In any case it needs tags from Heikki, Hans, Mika, Wolfram and Jonathan.

Testing and comments are warmly welcome.

In v4:
- directly return -EPROBE_DEFER from i2c_acpi_new_device()
- due to above split error handling simplification to separate patches

In v3:
- revisit error codes returned by i2c_acpi_new_device() (Hans, Mika)
- add documentation to exported i2c_acpi_get_i2c_resource() (Mika)
- drop Hans' Rb tag in patch 5 due to changes
- append Mika's Ab tag to patch 6

In v2:
- drop patches to copy fwnode and to handle BOSC0200 device
- append check for amount of devices listed in the driver's mapping
- add Rb tag given by Hans

Andy Shevchenko (15):
  defconfig: enable I2C_DEBUG_CORE
  platform/x86: intel_cht_int33fe: Remove duplicate NULL check
  platform/x86: intel_cht_int33fe: Accept errors of
    i2c_acpi_new_device()
  platform/x86: i2c-multi-instantiate: Accept errors of
    i2c_acpi_new_device()
  i2c: acpi: Return error pointers from i2c_acpi_new_device()
  platform/x86: intel_cht_int33fe: Get rid of obsolete conditional
  platform/x86: i2c-multi-instantiate: Get rid of obsolete conditional
  i2c: acpi: Use ACPI_FAILURE instead of !ACPI_SUCCESS
  i2c: acpi: Introduce i2c_acpi_get_i2c_resource() helper
  platform/x86: i2c-multi-instantiate: Count I2cSerialBus() resources
  platform/x86: i2c-multi-instantiate: Distinguish IRQ resource type
  platform/x86: i2c-multi-instantiate: Introduce IOAPIC IRQ support
  platform/x86: i2c-multi-instantiate: Allow to have same slaves
  ACPI / scan: Create platform device for INT3515 ACPI nodes
  iio: inv_mpu6050: Use i2c_acpi_get_i2c_resource() helper

 arch/x86/configs/i386_defconfig              |  1 +
 arch/x86/configs/x86_64_defconfig            |  1 +
 drivers/acpi/scan.c                          |  1 +
 drivers/i2c/i2c-core-acpi.c                  | 64 +++++++++----
 drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c   | 16 ++--
 drivers/platform/x86/i2c-multi-instantiate.c | 97 ++++++++++++++++----
 drivers/platform/x86/intel_cht_int33fe.c     | 20 ++--
 drivers/usb/typec/tps6598x.c                 |  8 +-
 include/linux/acpi.h                         | 11 +++
 9 files changed, 159 insertions(+), 60 deletions(-)

--
2.19.2

[PATCH v4 01/15] defconfig: enable I2C_DEBUG_CORE

[Andy Shevchenko]

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 arch/x86/configs/i386_defconfig   | 1 +
 arch/x86/configs/x86_64_defconfig | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/x86/configs/i386_defconfig b/arch/x86/configs/i386_defconfig
index 5d362dddec0c..3bbcca9b4ed7 100644
--- a/arch/x86/configs/i386_defconfig
+++ b/arch/x86/configs/i386_defconfig
@@ -320,6 +320,7 @@ CONFIG_I2C_DESIGNWARE_PCI=y
 CONFIG_I2C_DESIGNWARE_PLATFORM=m
 CONFIG_I2C_MUX=y
 CONFIG_I2C_MULTI_INSTANTIATE=m
+CONFIG_I2C_DEBUG_CORE=y
 CONFIG_IIO=y
 CONFIG_INV_MPU6050_I2C=m
 CONFIG_GPIOLIB=y
diff --git a/arch/x86/configs/x86_64_defconfig b/arch/x86/configs/x86_64_defconfig
index 041801355a1a..15511394847e 100644
--- a/arch/x86/configs/x86_64_defconfig
+++ b/arch/x86/configs/x86_64_defconfig
@@ -318,6 +318,7 @@ CONFIG_I2C_DESIGNWARE_PCI=y
 CONFIG_I2C_DESIGNWARE_PLATFORM=m
 CONFIG_I2C_MUX=y
 CONFIG_I2C_MULTI_INSTANTIATE=m
+CONFIG_I2C_DEBUG_CORE=y
 CONFIG_IIO=y
 CONFIG_INV_MPU6050_I2C=m
 CONFIG_GPIOLIB=y
-- 
2.19.2

[PATCH v4 02/15] platform/x86: intel_cht_int33fe: Remove duplicate NULL check

[Andy Shevchenko]

Since i2c_unregister_device() became NULL-aware we may remove duplicate
NULL check.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/intel_cht_int33fe.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/intel_cht_int33fe.c b/drivers/platform/x86/intel_cht_int33fe.c
index 464fe93657b5..431151d4e611 100644
--- a/drivers/platform/x86/intel_cht_int33fe.c
+++ b/drivers/platform/x86/intel_cht_int33fe.c
@@ -213,8 +213,7 @@ static int cht_int33fe_probe(struct platform_device *pdev)
 	i2c_unregister_device(data->fusb302);
 
 out_unregister_max17047:
-	if (data->max17047)
-		i2c_unregister_device(data->max17047);
+	i2c_unregister_device(data->max17047);
 
 	device_connections_remove(data->connections);
 
@@ -227,8 +226,7 @@ static int cht_int33fe_remove(struct platform_device *pdev)
 
 	i2c_unregister_device(data->pi3usb30532);
 	i2c_unregister_device(data->fusb302);
-	if (data->max17047)
-		i2c_unregister_device(data->max17047);
+	i2c_unregister_device(data->max17047);
 
 	device_connections_remove(data->connections);
 
-- 
2.19.2

[PATCH v4 03/15] platform/x86: intel_cht_int33fe: Accept errors of i2c_acpi_new_device()

[Andy Shevchenko]

In the future i2c_acpi_new_device() will return error pointer in some cases.
Prepare intel_cht_int33fe driver to support that.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/intel_cht_int33fe.c | 28 +++++++++++++++++++-----
 1 file changed, 23 insertions(+), 5 deletions(-)

diff --git a/drivers/platform/x86/intel_cht_int33fe.c b/drivers/platform/x86/intel_cht_int33fe.c
index 431151d4e611..367d6e304ade 100644
--- a/drivers/platform/x86/intel_cht_int33fe.c
+++ b/drivers/platform/x86/intel_cht_int33fe.c
@@ -168,8 +168,14 @@ static int cht_int33fe_probe(struct platform_device *pdev)
 		board_info.dev_name = "max17047";
 		board_info.properties = max17047_props;
 		data->max17047 = i2c_acpi_new_device(dev, 1, &board_info);
-		if (!data->max17047)
-			return -EPROBE_DEFER; /* Wait for i2c-adapter to load */
+		if (IS_ERR(data->max17047))
+			ret = PTR_ERR(data->max17047);
+		else if (!data->max17047)
+			ret = -EPROBE_DEFER; /* Wait for i2c-adapter to load */
+		else
+			ret = 0;
+		if (ret)
+			return ret;
 	}
 
 	data->connections[0].endpoint[0] = "port0";
@@ -194,7 +200,13 @@ static int cht_int33fe_probe(struct platform_device *pdev)
 	board_info.irq = fusb302_irq;
 
 	data->fusb302 = i2c_acpi_new_device(dev, 2, &board_info);
-	if (!data->fusb302)
+	if (IS_ERR(data->fusb302))
+		ret = PTR_ERR(data->fusb302);
+	else if (!data->fusb302)
+		ret = -EPROBE_DEFER; /* Wait for the i2c-adapter to load */
+	else
+		ret = 0;
+	if (ret)
 		goto out_unregister_max17047;
 
 	memset(&board_info, 0, sizeof(board_info));
@@ -202,7 +214,13 @@ static int cht_int33fe_probe(struct platform_device *pdev)
 	strlcpy(board_info.type, "pi3usb30532", I2C_NAME_SIZE);
 
 	data->pi3usb30532 = i2c_acpi_new_device(dev, 3, &board_info);
-	if (!data->pi3usb30532)
+	if (IS_ERR(data->pi3usb30532))
+		ret = PTR_ERR(data->pi3usb30532);
+	else if (!data->pi3usb30532)
+		ret = -EPROBE_DEFER; /* Wait for the i2c-adapter to load */
+	else
+		ret = 0;
+	if (ret)
 		goto out_unregister_fusb302;
 
 	platform_set_drvdata(pdev, data);
@@ -217,7 +235,7 @@ static int cht_int33fe_probe(struct platform_device *pdev)
 
 	device_connections_remove(data->connections);
 
-	return -EPROBE_DEFER; /* Wait for the i2c-adapter to load */
+	return ret;
 }
 
 static int cht_int33fe_remove(struct platform_device *pdev)
-- 
2.19.2

[PATCH v4 04/15] platform/x86: i2c-multi-instantiate: Accept errors of i2c_acpi_new_device()

[Andy Shevchenko]

In the future i2c_acpi_new_device() will return error pointer in some cases.
Prepare i2c-multi-instantiate driver to support that.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/i2c-multi-instantiate.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/i2c-multi-instantiate.c b/drivers/platform/x86/i2c-multi-instantiate.c
index 5456581b473c..16a0eabe1e31 100644
--- a/drivers/platform/x86/i2c-multi-instantiate.c
+++ b/drivers/platform/x86/i2c-multi-instantiate.c
@@ -72,9 +72,14 @@ static int i2c_multi_inst_probe(struct platform_device *pdev)
 			board_info.irq = ret;
 		}
 		multi->clients[i] = i2c_acpi_new_device(dev, i, &board_info);
-		if (!multi->clients[i]) {
+		if (IS_ERR(multi->clients[i]))
+			ret = PTR_ERR(multi->clients[i]);
+		else if (!multi->clients[i])
+			ret = -EPROBE_DEFER; /* Wait for i2c-adapter to load */
+		else
+			ret = 0;
+		if (ret) {
 			dev_err(dev, "Error creating i2c-client, idx %d\n", i);
-			ret = -ENODEV;
 			goto error;
 		}
 	}
-- 
2.19.2

[PATCH v4 05/15] i2c: acpi: Return error pointers from i2c_acpi_new_device()

[Andy Shevchenko]

The caller would like to know the reason why the i2c_acpi_new_device() fails.
For example, if adapter is not available, it might be in the future and we
would like to re-probe the clients again. But at the same time we would like to
bail out if the error seems unrecoverable, such as invalid argument supplied.
To achieve this, return error pointer in some cases.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/i2c/i2c-core-acpi.c | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c
index 32affd3fa8bd..689c0c467e97 100644
--- a/drivers/i2c/i2c-core-acpi.c
+++ b/drivers/i2c/i2c-core-acpi.c
@@ -386,20 +386,22 @@ struct notifier_block i2c_acpi_notifier = {
  *
  * Also see i2c_new_device, which this function calls to create the i2c-client.
  *
- * Returns a pointer to the new i2c-client, or NULL if the adapter is not found.
+ * Returns a pointer to the new i2c-client, or error pointer in case of failure.
+ * Specifically, -EPROBE_DEFER is returned if the adapter is not found.
  */
 struct i2c_client *i2c_acpi_new_device(struct device *dev, int index,
 				       struct i2c_board_info *info)
 {
 	struct i2c_acpi_lookup lookup;
 	struct i2c_adapter *adapter;
+	struct i2c_client *client;
 	struct acpi_device *adev;
 	LIST_HEAD(resource_list);
 	int ret;
 
 	adev = ACPI_COMPANION(dev);
 	if (!adev)
-		return NULL;
+		return ERR_PTR(-EINVAL);
 
 	memset(&lookup, 0, sizeof(lookup));
 	lookup.info = info;
@@ -408,16 +410,23 @@ struct i2c_client *i2c_acpi_new_device(struct device *dev, int index,
 
 	ret = acpi_dev_get_resources(adev, &resource_list,
 				     i2c_acpi_fill_info, &lookup);
+	if (ret < 0)
+		return ERR_PTR(ret);
+
 	acpi_dev_free_resource_list(&resource_list);
 
-	if (ret < 0 || !info->addr)
-		return NULL;
+	if (!info->addr)
+		return ERR_PTR(-EADDRNOTAVAIL);
 
 	adapter = i2c_acpi_find_adapter_by_handle(lookup.adapter_handle);
 	if (!adapter)
-		return NULL;
+		return ERR_PTR(-EPROBE_DEFER);
+
+	client = i2c_new_device(adapter, info);
+	if (!client)
+		return ERR_PTR(-ENODEV);
 
-	return i2c_new_device(adapter, info);
+	return client;
 }
 EXPORT_SYMBOL_GPL(i2c_acpi_new_device);
 
-- 
2.19.2

[PATCH v4 06/15] platform/x86: intel_cht_int33fe: Get rid of obsolete conditional

[Andy Shevchenko]

Now, when i2c_acpi_new_device() never returns NULL, there is no point to check
for it. Besides that, i2c_acpi_new_device() returns -EPROBE_DEFER directly and
caller doesn't need to guess is better.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/platform/x86/intel_cht_int33fe.c | 24 +++++-------------------
 1 file changed, 5 insertions(+), 19 deletions(-)

diff --git a/drivers/platform/x86/intel_cht_int33fe.c b/drivers/platform/x86/intel_cht_int33fe.c
index 367d6e304ade..616b8853a91f 100644
--- a/drivers/platform/x86/intel_cht_int33fe.c
+++ b/drivers/platform/x86/intel_cht_int33fe.c
@@ -169,13 +169,7 @@ static int cht_int33fe_probe(struct platform_device *pdev)
 		board_info.properties = max17047_props;
 		data->max17047 = i2c_acpi_new_device(dev, 1, &board_info);
 		if (IS_ERR(data->max17047))
-			ret = PTR_ERR(data->max17047);
-		else if (!data->max17047)
-			ret = -EPROBE_DEFER; /* Wait for i2c-adapter to load */
-		else
-			ret = 0;
-		if (ret)
-			return ret;
+			return PTR_ERR(data->max17047);
 	}
 
 	data->connections[0].endpoint[0] = "port0";
@@ -200,28 +194,20 @@ static int cht_int33fe_probe(struct platform_device *pdev)
 	board_info.irq = fusb302_irq;
 
 	data->fusb302 = i2c_acpi_new_device(dev, 2, &board_info);
-	if (IS_ERR(data->fusb302))
+	if (IS_ERR(data->fusb302)) {
 		ret = PTR_ERR(data->fusb302);
-	else if (!data->fusb302)
-		ret = -EPROBE_DEFER; /* Wait for the i2c-adapter to load */
-	else
-		ret = 0;
-	if (ret)
 		goto out_unregister_max17047;
+	}
 
 	memset(&board_info, 0, sizeof(board_info));
 	board_info.dev_name = "pi3usb30532";
 	strlcpy(board_info.type, "pi3usb30532", I2C_NAME_SIZE);
 
 	data->pi3usb30532 = i2c_acpi_new_device(dev, 3, &board_info);
-	if (IS_ERR(data->pi3usb30532))
+	if (IS_ERR(data->pi3usb30532)) {
 		ret = PTR_ERR(data->pi3usb30532);
-	else if (!data->pi3usb30532)
-		ret = -EPROBE_DEFER; /* Wait for the i2c-adapter to load */
-	else
-		ret = 0;
-	if (ret)
 		goto out_unregister_fusb302;
+	}
 
 	platform_set_drvdata(pdev, data);
 
-- 
2.19.2

[PATCH v4 07/15] platform/x86: i2c-multi-instantiate: Get rid of obsolete conditional

[Andy Shevchenko]

Now, when i2c_acpi_new_device() never returns NULL, there is no point to check
for it. Besides that, i2c_acpi_new_device() returns -EPROBE_DEFER directly and
caller doesn't need to guess is better.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/platform/x86/i2c-multi-instantiate.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/platform/x86/i2c-multi-instantiate.c b/drivers/platform/x86/i2c-multi-instantiate.c
index 16a0eabe1e31..724535673089 100644
--- a/drivers/platform/x86/i2c-multi-instantiate.c
+++ b/drivers/platform/x86/i2c-multi-instantiate.c
@@ -72,14 +72,10 @@ static int i2c_multi_inst_probe(struct platform_device *pdev)
 			board_info.irq = ret;
 		}
 		multi->clients[i] = i2c_acpi_new_device(dev, i, &board_info);
-		if (IS_ERR(multi->clients[i]))
+		if (IS_ERR(multi->clients[i])) {
 			ret = PTR_ERR(multi->clients[i]);
-		else if (!multi->clients[i])
-			ret = -EPROBE_DEFER; /* Wait for i2c-adapter to load */
-		else
-			ret = 0;
-		if (ret) {
-			dev_err(dev, "Error creating i2c-client, idx %d\n", i);
+			if (ret != -EPROBE_DEFER)
+				dev_err(dev, "Error creating i2c-client, idx %d\n", i);
 			goto error;
 		}
 	}
-- 
2.19.2

[PATCH v4 08/15] i2c: acpi: Use ACPI_FAILURE instead of !ACPI_SUCCESS

[Andy Shevchenko]

Convert to use ACPI_FAILURE instead of !ACPI_SUCCESS.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
---
 drivers/i2c/i2c-core-acpi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c
index 689c0c467e97..8a88586e0902 100644
--- a/drivers/i2c/i2c-core-acpi.c
+++ b/drivers/i2c/i2c-core-acpi.c
@@ -65,7 +65,7 @@ static int i2c_acpi_fill_info(struct acpi_resource *ares, void *data)
 	status = acpi_get_handle(lookup->device_handle,
 				 sb->resource_source.string_ptr,
 				 &lookup->adapter_handle);
-	if (!ACPI_SUCCESS(status))
+	if (ACPI_FAILURE(status))
 		return 1;
 
 	info->addr = sb->slave_address;
-- 
2.19.2

[PATCH v4 09/15] i2c: acpi: Introduce i2c_acpi_get_i2c_resource() helper

[Andy Shevchenko]

Besides current two users one more is coming. Definitely makes sense to
introduce a helper.

No functional change intended.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/i2c/i2c-core-acpi.c | 41 ++++++++++++++++++++++++++-----------
 include/linux/acpi.h        | 11 ++++++++++
 2 files changed, 40 insertions(+), 12 deletions(-)

diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c
index 8a88586e0902..272800692088 100644
--- a/drivers/i2c/i2c-core-acpi.c
+++ b/drivers/i2c/i2c-core-acpi.c
@@ -45,6 +45,33 @@ struct i2c_acpi_lookup {
 	u32 min_speed;
 };
 
+/**
+ * i2c_acpi_get_i2c_resource - Gets I2cSerialBus resource if type matches
+ * @ares:	ACPI resource
+ * @i2c:	Pointer to I2cSerialBus resource will be returned here
+ *
+ * Checks if the given ACPI resource is of type I2cSerialBus.
+ * In this case, returns a pointer to it to the caller.
+ *
+ * Returns true if resource type is of I2cSerialBus, otherwise false.
+ */
+bool i2c_acpi_get_i2c_resource(struct acpi_resource *ares,
+			       struct acpi_resource_i2c_serialbus **i2c)
+{
+	struct acpi_resource_i2c_serialbus *sb;
+
+	if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS)
+		return false;
+
+	sb = &ares->data.i2c_serial_bus;
+	if (sb->type != ACPI_RESOURCE_SERIAL_TYPE_I2C)
+		return false;
+
+	*i2c = sb;
+	return true;
+}
+EXPORT_SYMBOL_GPL(i2c_acpi_get_i2c_resource);
+
 static int i2c_acpi_fill_info(struct acpi_resource *ares, void *data)
 {
 	struct i2c_acpi_lookup *lookup = data;
@@ -52,11 +79,7 @@ static int i2c_acpi_fill_info(struct acpi_resource *ares, void *data)
 	struct acpi_resource_i2c_serialbus *sb;
 	acpi_status status;
 
-	if (info->addr || ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS)
-		return 1;
-
-	sb = &ares->data.i2c_serial_bus;
-	if (sb->type != ACPI_RESOURCE_SERIAL_TYPE_I2C)
+	if (info->addr || !i2c_acpi_get_i2c_resource(ares, &sb))
 		return 1;
 
 	if (lookup->index != -1 && lookup->n++ != lookup->index)
@@ -534,13 +557,7 @@ i2c_acpi_space_handler(u32 function, acpi_physical_address command,
 		goto err;
 	}
 
-	if (!value64 || ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) {
-		ret = AE_BAD_PARAMETER;
-		goto err;
-	}
-
-	sb = &ares->data.i2c_serial_bus;
-	if (sb->type != ACPI_RESOURCE_SERIAL_TYPE_I2C) {
+	if (!value64 || !i2c_acpi_get_i2c_resource(ares, &sb)) {
 		ret = AE_BAD_PARAMETER;
 		goto err;
 	}
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index ed80f147bd50..6afc6e3c4c5c 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -1054,6 +1054,17 @@ static inline int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index)
 }
 #endif
 
+#if defined(CONFIG_ACPI) && IS_ENABLED(CONFIG_I2C)
+bool i2c_acpi_get_i2c_resource(struct acpi_resource *ares,
+			       struct acpi_resource_i2c_serialbus **i2c);
+#else
+static inline bool i2c_acpi_get_i2c_resource(struct acpi_resource *ares,
+					     struct acpi_resource_i2c_serialbus **i2c)
+{
+	return false;
+}
+#endif
+
 /* Device properties */
 
 #ifdef CONFIG_ACPI
-- 
2.19.2

[PATCH v4 10/15] platform/x86: i2c-multi-instantiate: Count I2cSerialBus() resources

[Andy Shevchenko]

Instead of relying on hard coded and thus expected number of I2C clients,
count the real amount provided by firmware.

This allows to support non-fixed amount of the slaves.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/i2c-multi-instantiate.c | 41 ++++++++++++++++++--
 1 file changed, 37 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/i2c-multi-instantiate.c b/drivers/platform/x86/i2c-multi-instantiate.c
index 724535673089..d99bbaed0ca2 100644
--- a/drivers/platform/x86/i2c-multi-instantiate.c
+++ b/drivers/platform/x86/i2c-multi-instantiate.c
@@ -12,6 +12,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/types.h>
 
 struct i2c_inst_data {
 	const char *type;
@@ -23,6 +24,31 @@ struct i2c_multi_inst_data {
 	struct i2c_client *clients[0];
 };
 
+static int i2c_multi_inst_count(struct acpi_resource *ares, void *data)
+{
+	struct acpi_resource_i2c_serialbus *sb;
+	int *count = data;
+
+	if (i2c_acpi_get_i2c_resource(ares, &sb))
+		*count = *count + 1;
+
+	return 1;
+}
+
+static int i2c_multi_inst_count_resources(struct acpi_device *adev)
+{
+	LIST_HEAD(r);
+	int count = 0;
+	int ret;
+
+	ret = acpi_dev_get_resources(adev, &r, i2c_multi_inst_count, &count);
+	if (ret < 0)
+		return ret;
+
+	acpi_dev_free_resource_list(&r);
+	return count;
+}
+
 static int i2c_multi_inst_probe(struct platform_device *pdev)
 {
 	struct i2c_multi_inst_data *multi;
@@ -44,17 +70,19 @@ static int i2c_multi_inst_probe(struct platform_device *pdev)
 	adev = ACPI_COMPANION(dev);
 
 	/* Count number of clients to instantiate */
-	for (i = 0; inst_data[i].type; i++) {}
+	ret = i2c_multi_inst_count_resources(adev);
+	if (ret < 0)
+		return ret;
 
 	multi = devm_kmalloc(dev,
-			offsetof(struct i2c_multi_inst_data, clients[i]),
+			offsetof(struct i2c_multi_inst_data, clients[ret]),
 			GFP_KERNEL);
 	if (!multi)
 		return -ENOMEM;
 
-	multi->num_clients = i;
+	multi->num_clients = ret;
 
-	for (i = 0; i < multi->num_clients; i++) {
+	for (i = 0; i < multi->num_clients && inst_data[i].type; i++) {
 		memset(&board_info, 0, sizeof(board_info));
 		strlcpy(board_info.type, inst_data[i].type, I2C_NAME_SIZE);
 		snprintf(name, sizeof(name), "%s-%s", match->id,
@@ -79,6 +107,11 @@ static int i2c_multi_inst_probe(struct platform_device *pdev)
 			goto error;
 		}
 	}
+	if (i < multi->num_clients) {
+		dev_err(dev, "Error finding driver, idx %d\n", i);
+		ret = -ENODEV;
+		goto error;
+	}
 
 	platform_set_drvdata(pdev, multi);
 	return 0;
-- 
2.19.2

[PATCH v4 11/15] platform/x86: i2c-multi-instantiate: Distinguish IRQ resource type

[Andy Shevchenko]

As a preparatory patch switch the driver to distinguish IRQ resource type.
For now, only GpioInt() is supported.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/i2c-multi-instantiate.c | 27 +++++++++++++-------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/drivers/platform/x86/i2c-multi-instantiate.c b/drivers/platform/x86/i2c-multi-instantiate.c
index d99bbaed0ca2..99db3e336718 100644
--- a/drivers/platform/x86/i2c-multi-instantiate.c
+++ b/drivers/platform/x86/i2c-multi-instantiate.c
@@ -7,6 +7,7 @@
  */
 
 #include <linux/acpi.h>
+#include <linux/bits.h>
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
@@ -14,9 +15,14 @@
 #include <linux/platform_device.h>
 #include <linux/types.h>
 
+#define IRQ_RESOURCE_TYPE	GENMASK(1, 0)
+#define IRQ_RESOURCE_NONE	0
+#define IRQ_RESOURCE_GPIO	1
+
 struct i2c_inst_data {
 	const char *type;
-	int gpio_irq_idx;
+	unsigned int flags;
+	int irq_idx;
 };
 
 struct i2c_multi_inst_data {
@@ -88,16 +94,19 @@ static int i2c_multi_inst_probe(struct platform_device *pdev)
 		snprintf(name, sizeof(name), "%s-%s", match->id,
 			 inst_data[i].type);
 		board_info.dev_name = name;
-		board_info.irq = 0;
-		if (inst_data[i].gpio_irq_idx != -1) {
-			ret = acpi_dev_gpio_irq_get(adev,
-						    inst_data[i].gpio_irq_idx);
+		switch (inst_data[i].flags & IRQ_RESOURCE_TYPE) {
+		case IRQ_RESOURCE_GPIO:
+			ret = acpi_dev_gpio_irq_get(adev, inst_data[i].irq_idx);
 			if (ret < 0) {
 				dev_err(dev, "Error requesting irq at index %d: %d\n",
-					inst_data[i].gpio_irq_idx, ret);
+					inst_data[i].irq_idx, ret);
 				goto error;
 			}
 			board_info.irq = ret;
+			break;
+		default:
+			board_info.irq = 0;
+			break;
 		}
 		multi->clients[i] = i2c_acpi_new_device(dev, i, &board_info);
 		if (IS_ERR(multi->clients[i])) {
@@ -135,9 +144,9 @@ static int i2c_multi_inst_remove(struct platform_device *pdev)
 }
 
 static const struct i2c_inst_data bsg1160_data[]  = {
-	{ "bmc150_accel", 0 },
-	{ "bmc150_magn", -1 },
-	{ "bmg160", -1 },
+	{ "bmc150_accel", IRQ_RESOURCE_GPIO, 0 },
+	{ "bmc150_magn" },
+	{ "bmg160" },
 	{}
 };
 
-- 
2.19.2

[PATCH v4 12/15] platform/x86: i2c-multi-instantiate: Introduce IOAPIC IRQ support

[Andy Shevchenko]

If ACPI table provides an Interrupt() resource we may consider to use it
instead of GpioInt() one.

Here we leave an error condition, when getting IRQ resource, to the driver
to decide how to proceed, because some drivers may consider IRQ resource
optional.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/i2c-multi-instantiate.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/platform/x86/i2c-multi-instantiate.c b/drivers/platform/x86/i2c-multi-instantiate.c
index 99db3e336718..365457f9c424 100644
--- a/drivers/platform/x86/i2c-multi-instantiate.c
+++ b/drivers/platform/x86/i2c-multi-instantiate.c
@@ -18,6 +18,7 @@
 #define IRQ_RESOURCE_TYPE	GENMASK(1, 0)
 #define IRQ_RESOURCE_NONE	0
 #define IRQ_RESOURCE_GPIO	1
+#define IRQ_RESOURCE_APIC	2
 
 struct i2c_inst_data {
 	const char *type;
@@ -104,6 +105,14 @@ static int i2c_multi_inst_probe(struct platform_device *pdev)
 			}
 			board_info.irq = ret;
 			break;
+		case IRQ_RESOURCE_APIC:
+			ret = platform_get_irq(pdev, inst_data[i].irq_idx);
+			if (ret < 0) {
+				dev_dbg(dev, "Error requesting irq at index %d: %d\n",
+					inst_data[i].irq_idx, ret);
+			}
+			board_info.irq = ret;
+			break;
 		default:
 			board_info.irq = 0;
 			break;
-- 
2.19.2

[PATCH v4 13/15] platform/x86: i2c-multi-instantiate: Allow to have same slaves

[Andy Shevchenko]

Currently the driver will not enumerate the devices where I2C slaves
are of the same type.

Add an instance number to make them unique.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/i2c-multi-instantiate.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/i2c-multi-instantiate.c b/drivers/platform/x86/i2c-multi-instantiate.c
index 365457f9c424..2439d4c71118 100644
--- a/drivers/platform/x86/i2c-multi-instantiate.c
+++ b/drivers/platform/x86/i2c-multi-instantiate.c
@@ -92,8 +92,8 @@ static int i2c_multi_inst_probe(struct platform_device *pdev)
 	for (i = 0; i < multi->num_clients && inst_data[i].type; i++) {
 		memset(&board_info, 0, sizeof(board_info));
 		strlcpy(board_info.type, inst_data[i].type, I2C_NAME_SIZE);
-		snprintf(name, sizeof(name), "%s-%s", match->id,
-			 inst_data[i].type);
+		snprintf(name, sizeof(name), "%s-%s.%d", match->id,
+			 inst_data[i].type, i);
 		board_info.dev_name = name;
 		switch (inst_data[i].flags & IRQ_RESOURCE_TYPE) {
 		case IRQ_RESOURCE_GPIO:
-- 
2.19.2

[PATCH v4 14/15] ACPI / scan: Create platform device for INT3515 ACPI nodes

[Andy Shevchenko]

The ACPI device with INT3515 _HID is representing a complex USB PD
hardware infrastructure which includes several I2C slave ICs.

We add an ID to the I2C multi instantiate list to enumerate
all I2C slaves correctly.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/acpi/scan.c                          | 1 +
 drivers/platform/x86/i2c-multi-instantiate.c | 9 +++++++++
 drivers/usb/typec/tps6598x.c                 | 8 ++++----
 3 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index bd1c59fb0e17..e9eda5558c1f 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1541,6 +1541,7 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device)
 	static const struct acpi_device_id i2c_multi_instantiate_ids[] = {
 		{"BSG1160", },
 		{"INT33FE", },
+		{"INT3515", },
 		{}
 	};
 
diff --git a/drivers/platform/x86/i2c-multi-instantiate.c b/drivers/platform/x86/i2c-multi-instantiate.c
index 2439d4c71118..3d893e0ac250 100644
--- a/drivers/platform/x86/i2c-multi-instantiate.c
+++ b/drivers/platform/x86/i2c-multi-instantiate.c
@@ -159,12 +159,21 @@ static const struct i2c_inst_data bsg1160_data[]  = {
 	{}
 };
 
+static const struct i2c_inst_data int3515_data[]  = {
+	{ "tps6598x", IRQ_RESOURCE_APIC, 0 },
+	{ "tps6598x", IRQ_RESOURCE_APIC, 1 },
+	{ "tps6598x", IRQ_RESOURCE_APIC, 2 },
+	{ "tps6598x", IRQ_RESOURCE_APIC, 3 },
+	{}
+};
+
 /*
  * Note new device-ids must also be added to i2c_multi_instantiate_ids in
  * drivers/acpi/scan.c: acpi_device_enumeration_by_parent().
  */
 static const struct acpi_device_id i2c_multi_inst_acpi_ids[] = {
 	{ "BSG1160", (unsigned long)bsg1160_data },
+	{ "INT3515", (unsigned long)int3515_data },
 	{ }
 };
 MODULE_DEVICE_TABLE(acpi, i2c_multi_inst_acpi_ids);
diff --git a/drivers/usb/typec/tps6598x.c b/drivers/usb/typec/tps6598x.c
index c84c8c189e90..1c0033ad8738 100644
--- a/drivers/usb/typec/tps6598x.c
+++ b/drivers/usb/typec/tps6598x.c
@@ -501,19 +501,19 @@ static int tps6598x_remove(struct i2c_client *client)
 	return 0;
 }
 
-static const struct acpi_device_id tps6598x_acpi_match[] = {
-	{ "INT3515", 0 },
+static const struct i2c_device_id tps6598x_id[] = {
+	{ "tps6598x" },
 	{ }
 };
-MODULE_DEVICE_TABLE(acpi, tps6598x_acpi_match);
+MODULE_DEVICE_TABLE(i2c, tps6598x_id);
 
 static struct i2c_driver tps6598x_i2c_driver = {
 	.driver = {
 		.name = "tps6598x",
-		.acpi_match_table = tps6598x_acpi_match,
 	},
 	.probe_new = tps6598x_probe,
 	.remove = tps6598x_remove,
+	.id_table = tps6598x_id,
 };
 module_i2c_driver(tps6598x_i2c_driver);
 
-- 
2.19.2

[PATCH v4 15/15] iio: inv_mpu6050: Use i2c_acpi_get_i2c_resource() helper

[Andy Shevchenko]

ACPI provides a generic helper to get I2C Serial Bus resources.
Use it instead of open coded variant.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c
index d78a10403bac..a961b5a06fe6 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c
@@ -91,18 +91,14 @@ static int asus_acpi_get_sensor_info(struct acpi_device *adev,
 
 static int acpi_i2c_check_resource(struct acpi_resource *ares, void *data)
 {
+	struct acpi_resource_i2c_serialbus *sb;
 	u32 *addr = data;
 
-	if (ares->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) {
-		struct acpi_resource_i2c_serialbus *sb;
-
-		sb = &ares->data.i2c_serial_bus;
-		if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_I2C) {
-			if (*addr)
-				*addr |= (sb->slave_address << 16);
-			else
-				*addr = sb->slave_address;
-		}
+	if (i2c_acpi_get_i2c_resource(ares, &sb)) {
+		if (*addr)
+			*addr |= (sb->slave_address << 16);
+		else
+			*addr = sb->slave_address;
 	}
 
 	/* Tell the ACPI core that we already copied this address */
-- 
2.19.2

Re: [PATCH v4 00/15] i2c-multi-instantiate: Adapt for INT3515 and alike

[Andy Shevchenko]

On Wed, Nov 28, 2018 at 01:30:09PM +0200, Andy Shevchenko wrote:
> Currently i2c-multi-instantiate driver does not support the case
> of INT3515 USB PD device, where:
> 
> - Interrupt() is used instead of GpioInt()
> - All slaves may be the same from IP point of view
> - There can be variadic amount of slaves
> 
> This series is addressing all above.
> 
> Note, series has been smoke tested (Heikki would do BAT or more)
> on Intel Coffee Lake system.
> 
> The idea is to push this either through PDx86 tree (needs Rafael's ACKs) or ACPI.
> In any case it needs tags from Heikki, Hans, Mika, Wolfram and Jonathan.
> 
> Testing and comments are warmly welcome.
> 
> In v4:
> - directly return -EPROBE_DEFER from i2c_acpi_new_device()
> - due to above split error handling simplification to separate patches


Please, ignore this.
I messed up with the patches.

> 
> In v3:
> - revisit error codes returned by i2c_acpi_new_device() (Hans, Mika)
> - add documentation to exported i2c_acpi_get_i2c_resource() (Mika)
> - drop Hans' Rb tag in patch 5 due to changes
> - append Mika's Ab tag to patch 6
> 
> In v2:
> - drop patches to copy fwnode and to handle BOSC0200 device
> - append check for amount of devices listed in the driver's mapping
> - add Rb tag given by Hans
> 
> Andy Shevchenko (15):
>   defconfig: enable I2C_DEBUG_CORE
>   platform/x86: intel_cht_int33fe: Remove duplicate NULL check
>   platform/x86: intel_cht_int33fe: Accept errors of
>     i2c_acpi_new_device()
>   platform/x86: i2c-multi-instantiate: Accept errors of
>     i2c_acpi_new_device()
>   i2c: acpi: Return error pointers from i2c_acpi_new_device()
>   platform/x86: intel_cht_int33fe: Get rid of obsolete conditional
>   platform/x86: i2c-multi-instantiate: Get rid of obsolete conditional
>   i2c: acpi: Use ACPI_FAILURE instead of !ACPI_SUCCESS
>   i2c: acpi: Introduce i2c_acpi_get_i2c_resource() helper
>   platform/x86: i2c-multi-instantiate: Count I2cSerialBus() resources
>   platform/x86: i2c-multi-instantiate: Distinguish IRQ resource type
>   platform/x86: i2c-multi-instantiate: Introduce IOAPIC IRQ support
>   platform/x86: i2c-multi-instantiate: Allow to have same slaves
>   ACPI / scan: Create platform device for INT3515 ACPI nodes
>   iio: inv_mpu6050: Use i2c_acpi_get_i2c_resource() helper
> 
>  arch/x86/configs/i386_defconfig              |  1 +
>  arch/x86/configs/x86_64_defconfig            |  1 +
>  drivers/acpi/scan.c                          |  1 +
>  drivers/i2c/i2c-core-acpi.c                  | 64 +++++++++----
>  drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c   | 16 ++--
>  drivers/platform/x86/i2c-multi-instantiate.c | 97 ++++++++++++++++----
>  drivers/platform/x86/intel_cht_int33fe.c     | 20 ++--
>  drivers/usb/typec/tps6598x.c                 |  8 +-
>  include/linux/acpi.h                         | 11 +++
>  9 files changed, 159 insertions(+), 60 deletions(-)
> 
> --
> 2.19.2
> 

-- 
With Best Regards,
Andy Shevchenko