platform/x86: int3472: Split into 2 drivers

The intel_skl_int3472.ko module contains 2 separate drivers,
the int3472_discrete platform driver and the int3472_tps68470
I2C-driver.

These 2 drivers contain very little shared code, only
skl_int3472_get_acpi_buffer() and skl_int3472_fill_cldb() are
shared.

Split the module into 2 drivers, linking the little shared code
directly into both.

This will allow us to add soft-module dependencies for the
tps68470 clk, gpio and regulator drivers to the new
intel_skl_int3472_tps68470.ko to help with probe ordering issues
without causing these modules to get loaded on boards which only
use the int3472_discrete platform driver.

While at it also rename the .c and .h files to remove the
cumbersome intel_skl_int3472_ prefix.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211203102857.44539-8-hdegoede@redhat.com

1 files changed, 119 insertions, 0 deletions

diff --git a/drivers/platform/x86/intel/int3472/common.h b/drivers/platform/x86/intel/int3472/common.h
new file mode 100644
index 000000000000..d14944ee8586
--- /dev/null
+++ b/drivers/platform/x86/intel/int3472/common.h
@@ -0,0 +1,119 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Author: Dan Scally <djrscally@gmail.com> */
+
+#ifndef _INTEL_SKL_INT3472_H
+#define _INTEL_SKL_INT3472_H
+
+#include <linux/clk-provider.h>
+#include <linux/gpio/machine.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/types.h>
+
+/* FIXME drop this once the I2C_DEV_NAME_FORMAT macro has been added to include/linux/i2c.h */
+#ifndef I2C_DEV_NAME_FORMAT
+#define I2C_DEV_NAME_FORMAT					"i2c-%s"
+#endif
+
+/* PMIC GPIO Types */
+#define INT3472_GPIO_TYPE_RESET					0x00
+#define INT3472_GPIO_TYPE_POWERDOWN				0x01
+#define INT3472_GPIO_TYPE_POWER_ENABLE				0x0b
+#define INT3472_GPIO_TYPE_CLK_ENABLE				0x0c
+#define INT3472_GPIO_TYPE_PRIVACY_LED				0x0d
+
+#define INT3472_PDEV_MAX_NAME_LEN				23
+#define INT3472_MAX_SENSOR_GPIOS				3
+
+#define GPIO_REGULATOR_NAME_LENGTH				21
+#define GPIO_REGULATOR_SUPPLY_NAME_LENGTH			9
+
+#define CIO2_SENSOR_SSDB_MCLKSPEED_OFFSET			86
+
+#define INT3472_REGULATOR(_name, _supply, _ops)			\
+	(const struct regulator_desc) {				\
+		.name = _name,					\
+		.supply_name = _supply,				\
+		.type = REGULATOR_VOLTAGE,			\
+		.ops = _ops,					\
+		.owner = THIS_MODULE,				\
+	}
+
+#define to_int3472_clk(hw)					\
+	container_of(hw, struct int3472_gpio_clock, clk_hw)
+
+#define to_int3472_device(clk)					\
+	container_of(clk, struct int3472_discrete_device, clock)
+
+struct acpi_device;
+struct i2c_client;
+struct platform_device;
+
+struct int3472_cldb {
+	u8 version;
+	/*
+	 * control logic type
+	 * 0: UNKNOWN
+	 * 1: DISCRETE(CRD-D)
+	 * 2: PMIC TPS68470
+	 * 3: PMIC uP6641
+	 */
+	u8 control_logic_type;
+	u8 control_logic_id;
+	u8 sensor_card_sku;
+	u8 reserved[28];
+};
+
+struct int3472_gpio_function_remap {
+	const char *documented;
+	const char *actual;
+};
+
+struct int3472_sensor_config {
+	const char *sensor_module_name;
+	struct regulator_consumer_supply supply_map;
+	const struct int3472_gpio_function_remap *function_maps;
+};
+
+struct int3472_discrete_device {
+	struct acpi_device *adev;
+	struct device *dev;
+	struct acpi_device *sensor;
+	const char *sensor_name;
+
+	const struct int3472_sensor_config *sensor_config;
+
+	struct int3472_gpio_regulator {
+		char regulator_name[GPIO_REGULATOR_NAME_LENGTH];
+		char supply_name[GPIO_REGULATOR_SUPPLY_NAME_LENGTH];
+		struct gpio_desc *gpio;
+		struct regulator_dev *rdev;
+		struct regulator_desc rdesc;
+	} regulator;
+
+	struct int3472_gpio_clock {
+		struct clk *clk;
+		struct clk_hw clk_hw;
+		struct clk_lookup *cl;
+		struct gpio_desc *ena_gpio;
+		struct gpio_desc *led_gpio;
+		u32 frequency;
+	} clock;
+
+	unsigned int ngpios; /* how many GPIOs have we seen */
+	unsigned int n_sensor_gpios; /* how many have we mapped to sensor */
+	struct gpiod_lookup_table gpios;
+};
+
+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_register_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);
+void skl_int3472_unregister_regulator(struct int3472_discrete_device *int3472);
+
+#endif