linux/drivers/usb/typec/mux/it5205.c

// SPDX-License-Identifier: GPL-2.0
/*
 * ITE IT5205 Type-C USB alternate mode passive mux
 *
 * Copyright (c) 2020 MediaTek Inc.
 * Copyright (c) 2024 Collabora Ltd.
 *                    AngeloGioacchino Del Regno <[email protected]>
 *
 */

#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/usb/tcpm.h>
#include <linux/usb/typec.h>
#include <linux/usb/typec_dp.h>
#include <linux/usb/typec_mux.h>

#define IT5205_REG_CHIP_ID(x) …
#define IT5205FN_CHIP_ID …

/* MUX power down register */
#define IT5205_REG_MUXPDR …
#define IT5205_MUX_POWER_DOWN …

/* MUX control register */
#define IT5205_REG_MUXCR …
#define IT5205_POLARITY_INVERTED …
#define IT5205_DP_USB_CTRL_MASK …
#define IT5205_DP …
#define IT5205_DP_USB …
#define IT5205_USB …

/* Vref Select Register */
#define IT5205_REG_VSR …
#define IT5205_VREF_SELECT_MASK …
#define IT5205_VREF_SELECT_3_3V …
#define IT5205_VREF_SELECT_OFF …

/* CSBU Over Voltage Protection Register */
#define IT5205_REG_CSBUOVPSR …
#define IT5205_OVP_SELECT_MASK …
#define IT5205_OVP_3_90V …
#define IT5205_OVP_3_68V …
#define IT5205_OVP_3_62V …
#define IT5205_OVP_3_57V …

/* CSBU Switch Register */
#define IT5205_REG_CSBUSR …
#define IT5205_CSBUSR_SWITCH …

/* Interrupt Switch Register */
#define IT5205_REG_ISR …
#define IT5205_ISR_CSBU_MASK …
#define IT5205_ISR_CSBU_OVP …

struct it5205 { … };

static int it5205_switch_set(struct typec_switch_dev *sw, enum typec_orientation orientation)
{ … }

static int it5205_mux_set(struct typec_mux_dev *mux, struct typec_mux_state *state)
{ … }

static irqreturn_t it5205_irq_handler(int irq, void *data)
{ … }

static void it5205_enable_ovp(struct it5205 *it)
{ … }

static const struct regmap_config it5205_regmap = …;

static int it5205_probe(struct i2c_client *client)
{ … }

static void it5205_remove(struct i2c_client *client)
{ … }

static const struct i2c_device_id it5205_table[] = …;
MODULE_DEVICE_TABLE(i2c, it5205_table);

static const struct of_device_id it5205_of_table[] = …;
MODULE_DEVICE_TABLE(of, it5205_of_table);

static struct i2c_driver it5205_driver = …;
module_i2c_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;