// SPDX-License-Identifier: GPL-2.0-or-later /* * Intel CHT Whiskey Cove PMIC I2C controller driver * Copyright (C) 2017 Hans de Goede <[email protected]> * * Based on various non upstream patches to support the CHT Whiskey Cove PMIC: * Copyright (C) 2011 - 2014 Intel Corporation. All rights reserved. */ #include <linux/acpi.h> #include <linux/completion.h> #include <linux/delay.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/irqdomain.h> #include <linux/mfd/intel_soc_pmic.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/power/bq24190_charger.h> #include <linux/power/bq25890_charger.h> #include <linux/slab.h> #define CHT_WC_I2C_CTRL … #define CHT_WC_I2C_CTRL_WR … #define CHT_WC_I2C_CTRL_RD … #define CHT_WC_I2C_CLIENT_ADDR … #define CHT_WC_I2C_REG_OFFSET … #define CHT_WC_I2C_WRDATA … #define CHT_WC_I2C_RDDATA … #define CHT_WC_EXTCHGRIRQ … #define CHT_WC_EXTCHGRIRQ_CLIENT_IRQ … #define CHT_WC_EXTCHGRIRQ_WRITE_IRQ … #define CHT_WC_EXTCHGRIRQ_READ_IRQ … #define CHT_WC_EXTCHGRIRQ_NACK_IRQ … #define CHT_WC_EXTCHGRIRQ_ADAP_IRQMASK … #define CHT_WC_EXTCHGRIRQ_MSK … struct cht_wc_i2c_adap { … }; static irqreturn_t cht_wc_i2c_adap_thread_handler(int id, void *data) { … } static u32 cht_wc_i2c_adap_func(struct i2c_adapter *adap) { … } static int cht_wc_i2c_adap_smbus_xfer(struct i2c_adapter *_adap, u16 addr, unsigned short flags, char read_write, u8 command, int size, union i2c_smbus_data *data) { … } static const struct i2c_algorithm cht_wc_i2c_adap_algo = …; /* * We are an i2c-adapter which itself is part of an i2c-client. This means that * transfers done through us take adapter->bus_lock twice, once for our parent * i2c-adapter and once to take our own bus_lock. Lockdep does not like this * nested locking, to make lockdep happy in the case of busses with muxes, the * i2c-core's i2c_adapter_lock_bus function calls: * rt_mutex_lock_nested(&adapter->bus_lock, i2c_adapter_depth(adapter)); * * But i2c_adapter_depth only works when the direct parent of the adapter is * another adapter, as it is only meant for muxes. In our case there is an * i2c-client and MFD instantiated platform_device in the parent->child chain * between the 2 devices. * * So we override the default i2c_lock_operations and pass a hardcoded * depth of 1 to rt_mutex_lock_nested, to make lockdep happy. * * Note that if there were to be a mux attached to our adapter, this would * break things again since the i2c-mux code expects the root-adapter to have * a locking depth of 0. But we always have only 1 client directly attached * in the form of the Charger IC paired with the CHT Whiskey Cove PMIC. */ static void cht_wc_i2c_adap_lock_bus(struct i2c_adapter *adapter, unsigned int flags) { … } static int cht_wc_i2c_adap_trylock_bus(struct i2c_adapter *adapter, unsigned int flags) { … } static void cht_wc_i2c_adap_unlock_bus(struct i2c_adapter *adapter, unsigned int flags) { … } static const struct i2c_lock_operations cht_wc_i2c_adap_lock_ops = …; /**** irqchip for the client connected to the extchgr i2c adapter ****/ static void cht_wc_i2c_irq_lock(struct irq_data *data) { … } static void cht_wc_i2c_irq_sync_unlock(struct irq_data *data) { … } static void cht_wc_i2c_irq_enable(struct irq_data *data) { … } static void cht_wc_i2c_irq_disable(struct irq_data *data) { … } static const struct irq_chip cht_wc_i2c_irq_chip = …; /********** GPD Win / Pocket charger IC settings **********/ static const char * const bq24190_suppliers[] = …; static const struct property_entry bq24190_props[] = …; static const struct software_node bq24190_node = …; static struct regulator_consumer_supply fusb302_consumer = …; static const struct regulator_init_data bq24190_vbus_init_data = …; static struct bq24190_platform_data bq24190_pdata = …; static struct i2c_board_info gpd_win_board_info = …; /********** Xiaomi Mi Pad 2 charger IC settings **********/ static struct regulator_consumer_supply bq2589x_vbus_consumer = …; static const struct regulator_init_data bq2589x_vbus_init_data = …; static struct bq25890_platform_data bq2589x_pdata = …; static const struct property_entry xiaomi_mipad2_props[] = …; static const struct software_node xiaomi_mipad2_node = …; static struct i2c_board_info xiaomi_mipad2_board_info = …; /********** Lenovo Yogabook YB1-X90F/-X91F/-X91L charger settings **********/ static const char * const lenovo_yb1_bq25892_suppliers[] = …; static const struct property_entry lenovo_yb1_bq25892_props[] = …; static const struct software_node lenovo_yb1_bq25892_node = …; static struct i2c_board_info lenovo_yogabook1_board_info = …; /********** Lenovo Yogabook YT3-X90F charger settings **********/ static const char * const lenovo_yt3_bq25892_1_suppliers[] = …; /* * bq25892 charger settings for the round li-ion cells in the hinge, * this is the main / biggest battery. */ static const struct property_entry lenovo_yt3_bq25892_1_props[] = …; static const struct software_node lenovo_yt3_bq25892_1_node = …; /* bq25892 charger for the round li-ion cells in the hinge */ static struct i2c_board_info lenovo_yoga_tab3_board_info = …; static int cht_wc_i2c_adap_i2c_probe(struct platform_device *pdev) { … } static void cht_wc_i2c_adap_i2c_remove(struct platform_device *pdev) { … } static const struct platform_device_id cht_wc_i2c_adap_id_table[] = …; MODULE_DEVICE_TABLE(platform, cht_wc_i2c_adap_id_table); static struct platform_driver cht_wc_i2c_adap_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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