// SPDX-License-Identifier: GPL-2.0 /* * drivers/i2c/busses/i2c-mt7621.c * * Copyright (C) 2013 Steven Liu <[email protected]> * Copyright (C) 2016 Michael Lee <[email protected]> * Copyright (C) 2018 Jan Breuer <[email protected]> * * Improve driver for i2cdetect from i2c-tools to detect i2c devices on the bus. * (C) 2014 Sittisak <[email protected]> */ #include <linux/clk.h> #include <linux/delay.h> #include <linux/i2c.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/reset.h> #define REG_SM0CFG2_REG … #define REG_SM0CTL0_REG … #define REG_SM0CTL1_REG … #define REG_SM0D0_REG … #define REG_SM0D1_REG … #define REG_PINTEN_REG … #define REG_PINTST_REG … #define REG_PINTCL_REG … /* REG_SM0CFG2_REG */ #define SM0CFG2_IS_AUTOMODE … /* REG_SM0CTL0_REG */ #define SM0CTL0_ODRAIN … #define SM0CTL0_CLK_DIV_MASK … #define SM0CTL0_CLK_DIV_MAX … #define SM0CTL0_CS_STATUS … #define SM0CTL0_SCL_STATE … #define SM0CTL0_SDA_STATE … #define SM0CTL0_EN … #define SM0CTL0_SCL_STRETCH … /* REG_SM0CTL1_REG */ #define SM0CTL1_ACK_MASK … #define SM0CTL1_PGLEN_MASK … #define SM0CTL1_PGLEN(x) … #define SM0CTL1_READ … #define SM0CTL1_READ_LAST … #define SM0CTL1_STOP … #define SM0CTL1_WRITE … #define SM0CTL1_START … #define SM0CTL1_MODE_MASK … #define SM0CTL1_TRI … /* timeout waiting for I2C devices to respond */ #define TIMEOUT_MS … struct mtk_i2c { … }; static int mtk_i2c_wait_idle(struct mtk_i2c *i2c) { … } static void mtk_i2c_reset(struct mtk_i2c *i2c) { … } static void mtk_i2c_dump_reg(struct mtk_i2c *i2c) { … } static int mtk_i2c_check_ack(struct mtk_i2c *i2c, u32 expected) { … } static int mtk_i2c_start(struct mtk_i2c *i2c) { … } static int mtk_i2c_stop(struct mtk_i2c *i2c) { … } static int mtk_i2c_cmd(struct mtk_i2c *i2c, u32 cmd, int page_len) { … } static int mtk_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) { … } static u32 mtk_i2c_func(struct i2c_adapter *a) { … } static const struct i2c_algorithm mtk_i2c_algo = …; static const struct of_device_id i2c_mtk_dt_ids[] = …; MODULE_DEVICE_TABLE(of, i2c_mtk_dt_ids); static void mtk_i2c_init(struct mtk_i2c *i2c) { … } static int mtk_i2c_probe(struct platform_device *pdev) { … } static void mtk_i2c_remove(struct platform_device *pdev) { … } static struct platform_driver mtk_i2c_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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