Merge tag 'platform-drivers-x86-int3472-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86 into regulator-5.17

Signed tag for the immutable platform-drivers-x86-int3472 branch

This branch contains 5.16-rc1 + the pending ACPI/i2c, tps68570 platform_data
and INT3472 driver patches required so that the tps68570 regulator
driver can be applied.

Author: broonie

drivers/acpi/scan.c

@@ -797,6 +797,12 @@ static const char * const acpi_ignore_dep_ids[] = {
 	NULL
 };
 
+/* List of HIDs for which we honor deps of matching ACPI devs, when checking _DEP lists. */
+static const char * const acpi_honor_dep_ids[] = {
+	"INT3472", /* Camera sensor PMIC / clk and regulator info */
+	NULL
+};
+
 static struct acpi_device *acpi_bus_get_parent(acpi_handle handle)
 {
 	struct acpi_device *device = NULL;
@@ -1762,8 +1768,12 @@ static void acpi_scan_dep_init(struct acpi_device *adev)
 	struct acpi_dep_data *dep;
 
 	list_for_each_entry(dep, &acpi_dep_list, node) {
-		if (dep->consumer == adev->handle)
+		if (dep->consumer == adev->handle) {
+			if (dep->honor_dep)
+				adev->flags.honor_deps = 1;
+
 			adev->dep_unmet++;
+		}
 	}
 }
 
@@ -1967,7 +1977,7 @@ static u32 acpi_scan_check_dep(acpi_handle handle, bool check_dep)
 	for (count = 0, i = 0; i < dep_devices.count; i++) {
 		struct acpi_device_info *info;
 		struct acpi_dep_data *dep;
-		bool skip;
+		bool skip, honor_dep;
 
 		status = acpi_get_object_info(dep_devices.handles[i], &info);
 		if (ACPI_FAILURE(status)) {
@@ -1976,6 +1986,7 @@ static u32 acpi_scan_check_dep(acpi_handle handle, bool check_dep)
 		}
 
 		skip = acpi_info_matches_ids(info, acpi_ignore_dep_ids);
+		honor_dep = acpi_info_matches_ids(info, acpi_honor_dep_ids);
 		kfree(info);
 
 		if (skip)
@@ -1989,6 +2000,7 @@ static u32 acpi_scan_check_dep(acpi_handle handle, bool check_dep)
 
 		dep->supplier = dep_devices.handles[i];
 		dep->consumer = handle;
+		dep->honor_dep = honor_dep;
 
 		mutex_lock(&acpi_dep_list_lock);
 		list_add_tail(&dep->node , &acpi_dep_list);
@@ -2155,8 +2167,8 @@ static void acpi_bus_attach(struct acpi_device *device, bool first_pass)
 		register_dock_dependent_device(device, ejd);
 
 	acpi_bus_get_status(device);
-	/* Skip devices that are not present. */
-	if (!acpi_device_is_present(device)) {
+	/* Skip devices that are not ready for enumeration (e.g. not present) */
+	if (!acpi_dev_ready_for_enumeration(device)) {
 		device->flags.initialized = false;
 		acpi_device_clear_enumerated(device);
 		device->flags.power_manageable = 0;
@@ -2318,6 +2330,23 @@ void acpi_dev_clear_dependencies(struct acpi_device *supplier)
 }
 EXPORT_SYMBOL_GPL(acpi_dev_clear_dependencies);
 
+/**
+ * acpi_dev_ready_for_enumeration - Check if the ACPI device is ready for enumeration
+ * @device: Pointer to the &struct acpi_device to check
+ *
+ * Check if the device is present and has no unmet dependencies.
+ *
+ * Return true if the device is ready for enumeratino. Otherwise, return false.
+ */
+bool acpi_dev_ready_for_enumeration(const struct acpi_device *device)
+{
+	if (device->flags.honor_deps && device->dep_unmet)
+		return false;
+
+	return acpi_device_is_present(device);
+}
+EXPORT_SYMBOL_GPL(acpi_dev_ready_for_enumeration);
+
 /**
  * acpi_dev_get_first_consumer_dev - Return ACPI device dependent on @supplier
  * @supplier: Pointer to the dependee device

drivers/i2c/i2c-core-acpi.c

@@ -144,9 +144,12 @@ static int i2c_acpi_do_lookup(struct acpi_device *adev,
 	struct list_head resource_list;
 	int ret;
 
-	if (acpi_bus_get_status(adev) || !adev->status.present)
+	if (acpi_bus_get_status(adev))
 		return -EINVAL;
 
+	if (!acpi_dev_ready_for_enumeration(adev))
+		return -ENODEV;
+
 	if (acpi_match_device_ids(adev, i2c_acpi_ignored_device_ids) == 0)
 		return -ENODEV;
 
@@ -473,8 +476,8 @@ struct notifier_block i2c_acpi_notifier = {
 };
 
 /**
- * i2c_acpi_new_device - Create i2c-client for the Nth I2cSerialBus resource
- * @dev:     Device owning the ACPI resources to get the client from
+ * i2c_acpi_new_device_by_fwnode - Create i2c-client for the Nth I2cSerialBus resource
+ * @fwnode:  fwnode with the ACPI resources to get the client from
  * @index:   Index of ACPI resource to get
  * @info:    describes the I2C device; note this is modified (addr gets set)
  * Context: can sleep
@@ -490,15 +493,20 @@ struct notifier_block i2c_acpi_notifier = {
  * 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_client *i2c_acpi_new_device_by_fwnode(struct fwnode_handle *fwnode,
+						 int index,
+						 struct i2c_board_info *info)
 {
-	struct acpi_device *adev = ACPI_COMPANION(dev);
 	struct i2c_acpi_lookup lookup;
 	struct i2c_adapter *adapter;
+	struct acpi_device *adev;
 	LIST_HEAD(resource_list);
 	int ret;
 
+	adev = to_acpi_device_node(fwnode);
+	if (!adev)
+		return ERR_PTR(-ENODEV);
+
 	memset(&lookup, 0, sizeof(lookup));
 	lookup.info = info;
 	lookup.device_handle = acpi_device_handle(adev);
@@ -520,7 +528,7 @@ struct i2c_client *i2c_acpi_new_device(struct device *dev, int index,
 
 	return i2c_new_client_device(adapter, info);
 }
-EXPORT_SYMBOL_GPL(i2c_acpi_new_device);
+EXPORT_SYMBOL_GPL(i2c_acpi_new_device_by_fwnode);
 
 bool i2c_acpi_waive_d0_probe(struct device *dev)
 {

drivers/platform/x86/intel/int3472/Makefile

@@ -1,5 +1,4 @@
-obj-$(CONFIG_INTEL_SKL_INT3472)		+= intel_skl_int3472.o
-intel_skl_int3472-y			:= intel_skl_int3472_common.o \
-					   intel_skl_int3472_discrete.o \
-					   intel_skl_int3472_tps68470.o \
-					   intel_skl_int3472_clk_and_regulator.o
+obj-$(CONFIG_INTEL_SKL_INT3472)		+= intel_skl_int3472_discrete.o \
+					   intel_skl_int3472_tps68470.o
+intel_skl_int3472_discrete-y		:= discrete.o clk_and_regulator.o common.o
+intel_skl_int3472_tps68470-y		:= tps68470.o tps68470_board_data.o common.o

drivers/platform/x86/intel/int3472/intel_skl_int3472_clk_and_regulator.c renamed to drivers/platform/x86/intel/int3472/clk_and_regulator.c

@@ -9,7 +9,7 @@
 #include <linux/regulator/driver.h>
 #include <linux/slab.h>
 
-#include "intel_skl_int3472_common.h"
+#include "common.h"
 
 /*
  * The regulators have to have .ops to be valid, but the only ops we actually

drivers/platform/x86/intel/int3472/common.c

@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Author: Dan Scally <[email protected]> */
+
+#include <linux/acpi.h>
+#include <linux/slab.h>
+
+#include "common.h"
+
+union acpi_object *skl_int3472_get_acpi_buffer(struct acpi_device *adev, char *id)
+{
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	acpi_handle handle = adev->handle;
+	union acpi_object *obj;
+	acpi_status status;
+
+	status = acpi_evaluate_object(handle, id, NULL, &buffer);
+	if (ACPI_FAILURE(status))
+		return ERR_PTR(-ENODEV);
+
+	obj = buffer.pointer;
+	if (!obj)
+		return ERR_PTR(-ENODEV);
+
+	if (obj->type != ACPI_TYPE_BUFFER) {
+		acpi_handle_err(handle, "%s object is not an ACPI buffer\n", id);
+		kfree(obj);
+		return ERR_PTR(-EINVAL);
+	}
+
+	return obj;
+}
+
+int skl_int3472_fill_cldb(struct acpi_device *adev, struct int3472_cldb *cldb)
+{
+	union acpi_object *obj;
+	int ret;
+
+	obj = skl_int3472_get_acpi_buffer(adev, "CLDB");
+	if (IS_ERR(obj))
+		return PTR_ERR(obj);
+
+	if (obj->buffer.length > sizeof(*cldb)) {
+		acpi_handle_err(adev->handle, "The CLDB buffer is too large\n");
+		ret = -EINVAL;
+		goto out_free_obj;
+	}
+
+	memcpy(cldb, obj->buffer.pointer, obj->buffer.length);
+	ret = 0;
+
+out_free_obj:
+	kfree(obj);
+	return ret;
+}
+
+/* sensor_adev_ret may be NULL, name_ret must not be NULL */
+int skl_int3472_get_sensor_adev_and_name(struct device *dev,
+					 struct acpi_device **sensor_adev_ret,
+					 const char **name_ret)
+{
+	struct acpi_device *adev = ACPI_COMPANION(dev);
+	struct acpi_device *sensor;
+	int ret = 0;
+
+	sensor = acpi_dev_get_first_consumer_dev(adev);
+	if (!sensor) {
+		dev_err(dev, "INT3472 seems to have no dependents.\n");
+		return -ENODEV;
+	}
+
+	*name_ret = devm_kasprintf(dev, GFP_KERNEL, I2C_DEV_NAME_FORMAT,
+				   acpi_dev_name(sensor));
+	if (!*name_ret)
+		ret = -ENOMEM;
+
+	if (ret == 0 && sensor_adev_ret)
+		*sensor_adev_ret = sensor;
+	else
+		acpi_dev_put(sensor);
+
+	return ret;
+}

drivers/platform/x86/intel/int3472/intel_skl_int3472_common.h renamed to drivers/platform/x86/intel/int3472/common.h

@@ -105,12 +105,12 @@ struct int3472_discrete_device {
 	struct gpiod_lookup_table gpios;
 };
 
-int skl_int3472_discrete_probe(struct platform_device *pdev);
-int skl_int3472_discrete_remove(struct platform_device *pdev);
-int skl_int3472_tps68470_probe(struct i2c_client *client);
 union acpi_object *skl_int3472_get_acpi_buffer(struct acpi_device *adev,
 					       char *id);
 int skl_int3472_fill_cldb(struct acpi_device *adev, struct int3472_cldb *cldb);
+int skl_int3472_get_sensor_adev_and_name(struct device *dev,
+					 struct acpi_device **sensor_adev_ret,
+					 const char **name_ret);
 
 int skl_int3472_register_clock(struct int3472_discrete_device *int3472);
 void skl_int3472_unregister_clock(struct int3472_discrete_device *int3472);

drivers/platform/x86/intel/int3472/intel_skl_int3472_discrete.c renamed to drivers/platform/x86/intel/int3472/discrete.c

@@ -14,7 +14,7 @@
 #include <linux/platform_device.h>
 #include <linux/uuid.h>
 
-#include "intel_skl_int3472_common.h"
+#include "common.h"
 
 /*
  * 79234640-9e10-4fea-a5c1-b5aa8b19756f
@@ -332,7 +332,9 @@ static int skl_int3472_parse_crs(struct int3472_discrete_device *int3472)
 	return 0;
 }
 
-int skl_int3472_discrete_probe(struct platform_device *pdev)
+static int skl_int3472_discrete_remove(struct platform_device *pdev);
+
+static int skl_int3472_discrete_probe(struct platform_device *pdev)
 {
 	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
 	struct int3472_discrete_device *int3472;
@@ -361,19 +363,10 @@ int skl_int3472_discrete_probe(struct platform_device *pdev)
 	int3472->dev = &pdev->dev;
 	platform_set_drvdata(pdev, int3472);
 
-	int3472->sensor = acpi_dev_get_first_consumer_dev(adev);
-	if (!int3472->sensor) {
-		dev_err(&pdev->dev, "INT3472 seems to have no dependents.\n");
-		return -ENODEV;
-	}
-
-	int3472->sensor_name = devm_kasprintf(int3472->dev, GFP_KERNEL,
-					      I2C_DEV_NAME_FORMAT,
-					      acpi_dev_name(int3472->sensor));
-	if (!int3472->sensor_name) {
-		ret = -ENOMEM;
-		goto err_put_sensor;
-	}
+	ret = skl_int3472_get_sensor_adev_and_name(&pdev->dev, &int3472->sensor,
+						   &int3472->sensor_name);
+	if (ret)
+		return ret;
 
 	/*
 	 * Initialising this list means we can call gpiod_remove_lookup_table()
@@ -387,15 +380,11 @@ int skl_int3472_discrete_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	acpi_dev_clear_dependencies(adev);
 	return 0;
-
-err_put_sensor:
-	acpi_dev_put(int3472->sensor);
-
-	return ret;
 }
 
-int skl_int3472_discrete_remove(struct platform_device *pdev)
+static int skl_int3472_discrete_remove(struct platform_device *pdev)
 {
 	struct int3472_discrete_device *int3472 = platform_get_drvdata(pdev);
 
@@ -411,3 +400,23 @@ int skl_int3472_discrete_remove(struct platform_device *pdev)
 
 	return 0;
 }
+
+static const struct acpi_device_id int3472_device_id[] = {
+	{ "INT3472", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, int3472_device_id);
+
+static struct platform_driver int3472_discrete = {
+	.driver = {
+		.name = "int3472-discrete",
+		.acpi_match_table = int3472_device_id,
+	},
+	.probe = skl_int3472_discrete_probe,
+	.remove = skl_int3472_discrete_remove,
+};
+module_platform_driver(int3472_discrete);
+
+MODULE_DESCRIPTION("Intel SkyLake INT3472 ACPI Discrete Device Driver");
+MODULE_AUTHOR("Daniel Scally <[email protected]>");
+MODULE_LICENSE("GPL v2");