Merge tag 'platform-drivers-x86-ib-int3472-v6.7' of https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86 into gpio/for-next

Immutable branch between pdx86 int3472 branch and GPIO due for the v6.7 merge window.

platform-drivers-x86-ib-int3472-v6.7: v6.6-rc1 + platform-drivers-x86-int3472
for merging into the GPIO subsystem for v6.7.

Author: Bartosz Golaszewski

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

@@ -162,9 +162,8 @@ int skl_int3472_register_dsm_clock(struct int3472_discrete_device *int3472)
 }
 
 int skl_int3472_register_gpio_clock(struct int3472_discrete_device *int3472,
-				    struct acpi_resource_gpio *agpio, u32 polarity)
+				    struct gpio_desc *gpio)
 {
-	char *path = agpio->resource_source.string_ptr;
 	struct clk_init_data init = {
 		.ops = &skl_int3472_clock_ops,
 		.flags = CLK_GET_RATE_NOCACHE,
@@ -174,26 +173,12 @@ int skl_int3472_register_gpio_clock(struct int3472_discrete_device *int3472,
 	if (int3472->clock.cl)
 		return -EBUSY;
 
-	int3472->clock.ena_gpio = acpi_get_and_request_gpiod(path, agpio->pin_table[0],
-							     "int3472,clk-enable");
-	if (IS_ERR(int3472->clock.ena_gpio)) {
-		ret = PTR_ERR(int3472->clock.ena_gpio);
-		int3472->clock.ena_gpio = NULL;
-		return dev_err_probe(int3472->dev, ret, "getting clk-enable GPIO\n");
-	}
-
-	if (polarity == GPIO_ACTIVE_LOW)
-		gpiod_toggle_active_low(int3472->clock.ena_gpio);
-
-	/* Ensure the pin is in output mode and non-active state */
-	gpiod_direction_output(int3472->clock.ena_gpio, 0);
+	int3472->clock.ena_gpio = gpio;
 
 	init.name = kasprintf(GFP_KERNEL, "%s-clk",
 			      acpi_dev_name(int3472->adev));
-	if (!init.name) {
-		ret = -ENOMEM;
-		goto out_put_gpio;
-	}
+	if (!init.name)
+		return -ENOMEM;
 
 	int3472->clock.frequency = skl_int3472_get_clk_frequency(int3472);
 
@@ -219,8 +204,6 @@ int skl_int3472_register_gpio_clock(struct int3472_discrete_device *int3472,
 	clk_unregister(int3472->clock.clk);
 out_free_init_name:
 	kfree(init.name);
-out_put_gpio:
-	gpiod_put(int3472->clock.ena_gpio);
 
 	return ret;
 }
@@ -232,7 +215,6 @@ void skl_int3472_unregister_clock(struct int3472_discrete_device *int3472)
 
 	clkdev_drop(int3472->clock.cl);
 	clk_unregister(int3472->clock.clk);
-	gpiod_put(int3472->clock.ena_gpio);
 }
 
 /*
@@ -273,14 +255,13 @@ static const struct dmi_system_id skl_int3472_regulator_second_sensor[] = {
 };
 
 int skl_int3472_register_regulator(struct int3472_discrete_device *int3472,
-				   struct acpi_resource_gpio *agpio)
+				   struct gpio_desc *gpio)
 {
-	char *path = agpio->resource_source.string_ptr;
 	struct regulator_init_data init_data = { };
 	struct regulator_config cfg = { };
 	const char *second_sensor = NULL;
 	const struct dmi_system_id *id;
-	int i, j, ret;
+	int i, j;
 
 	id = dmi_first_match(skl_int3472_regulator_second_sensor);
 	if (id)
@@ -314,16 +295,7 @@ int skl_int3472_register_regulator(struct int3472_discrete_device *int3472,
 						int3472->regulator.supply_name,
 						&int3472_gpio_regulator_ops);
 
-	int3472->regulator.gpio = acpi_get_and_request_gpiod(path, agpio->pin_table[0],
-							     "int3472,regulator");
-	if (IS_ERR(int3472->regulator.gpio)) {
-		ret = PTR_ERR(int3472->regulator.gpio);
-		int3472->regulator.gpio = NULL;
-		return dev_err_probe(int3472->dev, ret, "getting regulator GPIO\n");
-	}
-
-	/* Ensure the pin is in output mode and non-active state */
-	gpiod_direction_output(int3472->regulator.gpio, 0);
+	int3472->regulator.gpio = gpio;
 
 	cfg.dev = &int3472->adev->dev;
 	cfg.init_data = &init_data;
@@ -332,21 +304,11 @@ int skl_int3472_register_regulator(struct int3472_discrete_device *int3472,
 	int3472->regulator.rdev = regulator_register(int3472->dev,
 						     &int3472->regulator.rdesc,
 						     &cfg);
-	if (IS_ERR(int3472->regulator.rdev)) {
-		ret = PTR_ERR(int3472->regulator.rdev);
-		goto err_free_gpio;
-	}
 
-	return 0;
-
-err_free_gpio:
-	gpiod_put(int3472->regulator.gpio);
-
-	return ret;
+	return PTR_ERR_OR_ZERO(int3472->regulator.rdev);
 }
 
 void skl_int3472_unregister_regulator(struct int3472_discrete_device *int3472)
 {
 	regulator_unregister(int3472->regulator.rdev);
-	gpiod_put(int3472->regulator.gpio);
 }

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

@@ -117,16 +117,15 @@ int skl_int3472_get_sensor_adev_and_name(struct device *dev,
 					 const char **name_ret);
 
 int skl_int3472_register_gpio_clock(struct int3472_discrete_device *int3472,
-				    struct acpi_resource_gpio *agpio, u32 polarity);
+				    struct gpio_desc *gpio);
 int skl_int3472_register_dsm_clock(struct int3472_discrete_device *int3472);
 void skl_int3472_unregister_clock(struct int3472_discrete_device *int3472);
 
 int skl_int3472_register_regulator(struct int3472_discrete_device *int3472,
-				   struct acpi_resource_gpio *agpio);
+				   struct gpio_desc *gpio);
 void skl_int3472_unregister_regulator(struct int3472_discrete_device *int3472);
 
-int skl_int3472_register_pled(struct int3472_discrete_device *int3472,
-			      struct acpi_resource_gpio *agpio, u32 polarity);
+int skl_int3472_register_pled(struct int3472_discrete_device *int3472, struct gpio_desc *gpio);
 void skl_int3472_unregister_pled(struct int3472_discrete_device *int3472);
 
 #endif

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

@@ -52,21 +52,15 @@ static void skl_int3472_log_sensor_module_name(struct int3472_discrete_device *i
 	}
 }
 
-static int skl_int3472_map_gpio_to_sensor(struct int3472_discrete_device *int3472,
-					  struct acpi_resource_gpio *agpio,
-					  const char *func, u32 polarity)
+static int skl_int3472_fill_gpiod_lookup(struct gpiod_lookup *table_entry,
+					 struct acpi_resource_gpio *agpio,
+					 const char *func, u32 polarity)
 {
 	char *path = agpio->resource_source.string_ptr;
-	struct gpiod_lookup *table_entry;
 	struct acpi_device *adev;
 	acpi_handle handle;
 	acpi_status status;
 
-	if (int3472->n_sensor_gpios >= INT3472_MAX_SENSOR_GPIOS) {
-		dev_warn(int3472->dev, "Too many GPIOs mapped\n");
-		return -EINVAL;
-	}
-
 	status = acpi_get_handle(NULL, path, &handle);
 	if (ACPI_FAILURE(status))
 		return -EINVAL;
@@ -75,18 +69,62 @@ static int skl_int3472_map_gpio_to_sensor(struct int3472_discrete_device *int347
 	if (!adev)
 		return -ENODEV;
 
-	table_entry = &int3472->gpios.table[int3472->n_sensor_gpios];
 	table_entry->key = acpi_dev_name(adev);
 	table_entry->chip_hwnum = agpio->pin_table[0];
 	table_entry->con_id = func;
 	table_entry->idx = 0;
 	table_entry->flags = polarity;
 
+	return 0;
+}
+
+static int skl_int3472_map_gpio_to_sensor(struct int3472_discrete_device *int3472,
+					  struct acpi_resource_gpio *agpio,
+					  const char *func, u32 polarity)
+{
+	int ret;
+
+	if (int3472->n_sensor_gpios >= INT3472_MAX_SENSOR_GPIOS) {
+		dev_warn(int3472->dev, "Too many GPIOs mapped\n");
+		return -EINVAL;
+	}
+
+	ret = skl_int3472_fill_gpiod_lookup(&int3472->gpios.table[int3472->n_sensor_gpios],
+					    agpio, func, polarity);
+	if (ret)
+		return ret;
+
 	int3472->n_sensor_gpios++;
 
 	return 0;
 }
 
+/* This should *really* only be used when there's no other way... */
+static struct gpio_desc *
+skl_int3472_gpiod_get_from_temp_lookup(struct int3472_discrete_device *int3472,
+				       struct acpi_resource_gpio *agpio,
+				       const char *func, u32 polarity)
+{
+	struct gpio_desc *desc;
+	int ret;
+
+	struct gpiod_lookup_table *lookup __free(kfree) =
+			kzalloc(struct_size(lookup, table, 2), GFP_KERNEL);
+	if (!lookup)
+		return ERR_PTR(-ENOMEM);
+
+	lookup->dev_id = dev_name(int3472->dev);
+	ret = skl_int3472_fill_gpiod_lookup(&lookup->table[0], agpio, func, polarity);
+	if (ret)
+		return ERR_PTR(ret);
+
+	gpiod_add_lookup_table(lookup);
+	desc = devm_gpiod_get(int3472->dev, func, GPIOD_OUT_LOW);
+	gpiod_remove_lookup_table(lookup);
+
+	return desc;
+}
+
 static void int3472_get_func_and_polarity(u8 type, const char **func, u32 *polarity)
 {
 	switch (type) {
@@ -156,6 +194,7 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares,
 	struct acpi_resource_gpio *agpio;
 	u8 active_value, pin, type;
 	union acpi_object *obj;
+	struct gpio_desc *gpio;
 	const char *err_msg;
 	const char *func;
 	u32 polarity;
@@ -206,22 +245,38 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares,
 
 		break;
 	case INT3472_GPIO_TYPE_CLK_ENABLE:
-		ret = skl_int3472_register_gpio_clock(int3472, agpio, polarity);
-		if (ret)
-			err_msg = "Failed to register clock\n";
-
-		break;
 	case INT3472_GPIO_TYPE_PRIVACY_LED:
-		ret = skl_int3472_register_pled(int3472, agpio, polarity);
-		if (ret)
-			err_msg = "Failed to register LED\n";
-
-		break;
 	case INT3472_GPIO_TYPE_POWER_ENABLE:
-		ret = skl_int3472_register_regulator(int3472, agpio);
-		if (ret)
-			err_msg = "Failed to map regulator to sensor\n";
-
+		gpio = skl_int3472_gpiod_get_from_temp_lookup(int3472, agpio, func, polarity);
+		if (IS_ERR(gpio)) {
+			ret = PTR_ERR(gpio);
+			err_msg = "Failed to get GPIO\n";
+			break;
+		}
+
+		switch (type) {
+		case INT3472_GPIO_TYPE_CLK_ENABLE:
+			ret = skl_int3472_register_gpio_clock(int3472, gpio);
+			if (ret)
+				err_msg = "Failed to register clock\n";
+
+			break;
+		case INT3472_GPIO_TYPE_PRIVACY_LED:
+			ret = skl_int3472_register_pled(int3472, gpio);
+			if (ret)
+				err_msg = "Failed to register LED\n";
+
+			break;
+		case INT3472_GPIO_TYPE_POWER_ENABLE:
+			ret = skl_int3472_register_regulator(int3472, gpio);
+			if (ret)
+				err_msg = "Failed to map regulator to sensor\n";
+
+			break;
+		default: /* Never reached */
+			ret = -EINVAL;
+			break;
+		}
 		break;
 	default:
 		dev_warn(int3472->dev,

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

@@ -16,26 +16,15 @@ static int int3472_pled_set(struct led_classdev *led_cdev,
 	return 0;
 }
 
-int skl_int3472_register_pled(struct int3472_discrete_device *int3472,
-			      struct acpi_resource_gpio *agpio, u32 polarity)
+int skl_int3472_register_pled(struct int3472_discrete_device *int3472, struct gpio_desc *gpio)
 {
-	char *p, *path = agpio->resource_source.string_ptr;
+	char *p;
 	int ret;
 
 	if (int3472->pled.classdev.dev)
 		return -EBUSY;
 
-	int3472->pled.gpio = acpi_get_and_request_gpiod(path, agpio->pin_table[0],
-							     "int3472,privacy-led");
-	if (IS_ERR(int3472->pled.gpio))
-		return dev_err_probe(int3472->dev, PTR_ERR(int3472->pled.gpio),
-				     "getting privacy LED GPIO\n");
-
-	if (polarity == GPIO_ACTIVE_LOW)
-		gpiod_toggle_active_low(int3472->pled.gpio);
-
-	/* Ensure the pin is in output mode and non-active state */
-	gpiod_direction_output(int3472->pled.gpio, 0);
+	int3472->pled.gpio = gpio;
 
 	/* Generate the name, replacing the ':' in the ACPI devname with '_' */
 	snprintf(int3472->pled.name, sizeof(int3472->pled.name),
@@ -50,18 +39,14 @@ int skl_int3472_register_pled(struct int3472_discrete_device *int3472,
 
 	ret = led_classdev_register(int3472->dev, &int3472->pled.classdev);
 	if (ret)
-		goto err_free_gpio;
+		return ret;
 
 	int3472->pled.lookup.provider = int3472->pled.name;
 	int3472->pled.lookup.dev_id = int3472->sensor_name;
 	int3472->pled.lookup.con_id = "privacy-led";
 	led_add_lookup(&int3472->pled.lookup);
 
 	return 0;
-
-err_free_gpio:
-	gpiod_put(int3472->pled.gpio);
-	return ret;
 }
 
 void skl_int3472_unregister_pled(struct int3472_discrete_device *int3472)
@@ -71,5 +56,4 @@ void skl_int3472_unregister_pled(struct int3472_discrete_device *int3472)
 
 	led_remove_lookup(&int3472->pled.lookup);
 	led_classdev_unregister(&int3472->pled.classdev);
-	gpiod_put(int3472->pled.gpio);
 }