// SPDX-License-Identifier: GPL-2.0 /* * Intel Cherry Trail ACPI INT33FE pseudo device driver * * Copyright (C) 2017 Hans de Goede <[email protected]> * * Some Intel Cherry Trail based device which ship with Windows 10, have * this weird INT33FE ACPI device with a CRS table with 4 I2cSerialBusV2 * resources, for 4 different chips attached to various I²C buses: * 1. The Whiskey Cove PMIC, which is also described by the INT34D3 ACPI device * 2. Maxim MAX17047 Fuel Gauge Controller * 3. FUSB302 USB Type-C Controller * 4. PI3USB30532 USB switch * * So this driver is a stub / pseudo driver whose only purpose is to * instantiate I²C clients for chips 2 - 4, so that standard I²C drivers * for these chips can bind to the them. */ #include <linux/dmi.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/pci.h> #include <linux/platform_device.h> #include <linux/property.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/usb/pd.h> struct cht_int33fe_data { … }; /* * Grrr, I severely dislike buggy BIOS-es. At least one BIOS enumerates * the max17047 both through the INT33FE ACPI device (it is right there * in the resources table) as well as through a separate MAX17047 device. * * These helpers are used to work around this by checking if an I²C client * for the max17047 has already been registered. */ static int cht_int33fe_check_for_max17047(struct device *dev, void *data) { … } static const char * const max17047_suppliers[] = …; static const struct property_entry max17047_properties[] = …; static const struct software_node max17047_node = …; /* * We are not using inline property here because those are constant, * and we need to adjust this one at runtime to point to real * software node. */ static struct software_node_ref_args fusb302_mux_refs[] = …; static const struct property_entry fusb302_properties[] = …; static const struct software_node fusb302_node = …; #define PDO_FIXED_FLAGS … static const u32 src_pdo[] = …; static const u32 snk_pdo[] = …; static const struct software_node pi3usb30532_node = …; static const struct software_node displayport_node = …; static const struct property_entry usb_connector_properties[] = …; static const struct software_node usb_connector_node = …; static const struct software_node altmodes_node = …; static const struct property_entry dp_altmode_properties[] = …; static const struct software_node dp_altmode_node = …; static const struct software_node *node_group[] = …; static int cht_int33fe_setup_dp(struct cht_int33fe_data *data) { … } static void cht_int33fe_remove_nodes(struct cht_int33fe_data *data) { … } static int cht_int33fe_add_nodes(struct cht_int33fe_data *data) { … } static int cht_int33fe_register_max17047(struct device *dev, struct cht_int33fe_data *data) { … } static const struct dmi_system_id cht_int33fe_typec_ids[] = …; MODULE_DEVICE_TABLE(dmi, cht_int33fe_typec_ids); static int cht_int33fe_typec_probe(struct platform_device *pdev) { … } static void cht_int33fe_typec_remove(struct platform_device *pdev) { … } static const struct acpi_device_id cht_int33fe_acpi_ids[] = …; static struct platform_driver cht_int33fe_typec_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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