// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2011 NXP Semiconductors * * Code portions referenced from the i2x-pxa and i2c-pnx drivers * * Make SMBus byte and word transactions work on LPC178x/7x * Copyright (c) 2012 * Alexander Potashev, Emcraft Systems, [email protected] * Anton Protopopov, Emcraft Systems, [email protected] * * Copyright (C) 2015 Joachim Eastwood <[email protected]> */ #include <linux/clk.h> #include <linux/errno.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/sched.h> #include <linux/time.h> /* LPC24xx register offsets and bits */ #define LPC24XX_I2CONSET … #define LPC24XX_I2STAT … #define LPC24XX_I2DAT … #define LPC24XX_I2ADDR … #define LPC24XX_I2SCLH … #define LPC24XX_I2SCLL … #define LPC24XX_I2CONCLR … #define LPC24XX_AA … #define LPC24XX_SI … #define LPC24XX_STO … #define LPC24XX_STA … #define LPC24XX_I2EN … #define LPC24XX_STO_AA … #define LPC24XX_CLEAR_ALL … /* I2C SCL clock has different duty cycle depending on mode */ #define I2C_STD_MODE_DUTY … #define I2C_FAST_MODE_DUTY … #define I2C_FAST_MODE_PLUS_DUTY … /* * 26 possible I2C status codes, but codes applicable only * to controller mode are listed here and used in this driver */ enum { … }; struct lpc2k_i2c { … }; static void i2c_lpc2k_reset(struct lpc2k_i2c *i2c) { … } static int i2c_lpc2k_clear_arb(struct lpc2k_i2c *i2c) { … } static void i2c_lpc2k_pump_msg(struct lpc2k_i2c *i2c) { … } static int lpc2k_process_msg(struct lpc2k_i2c *i2c, int msgidx) { … } static int i2c_lpc2k_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int msg_num) { … } static irqreturn_t i2c_lpc2k_handler(int irq, void *dev_id) { … } static u32 i2c_lpc2k_functionality(struct i2c_adapter *adap) { … } static const struct i2c_algorithm i2c_lpc2k_algorithm = …; static int i2c_lpc2k_probe(struct platform_device *pdev) { … } static void i2c_lpc2k_remove(struct platform_device *dev) { … } static int i2c_lpc2k_suspend(struct device *dev) { … } static int i2c_lpc2k_resume(struct device *dev) { … } static const struct dev_pm_ops i2c_lpc2k_dev_pm_ops = …; static const struct of_device_id lpc2k_i2c_match[] = …; MODULE_DEVICE_TABLE(of, lpc2k_i2c_match); static struct platform_driver i2c_lpc2k_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
Codebase Browser
linux