xref: /kernel/linux/linux-5.10/drivers/gpu/drm/loongson/loongson_i2c.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Copyright (c) 2020 Loongson Technology Co., Ltd.
 * Authors:
 *	sunhao <sunhao@loongson.cn>
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#ifndef __LOONGSON_I2C_H__
#define __LOONGSON_I2C_H__

#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <drm/drm_edid.h>

/* Modify this marco to config i2c bus speed, bus_freq = 500 / T */
/* Eg: i2c_bus_freq=100k when T=5 */
#define DC_I2C_TON 5
#define DC_I2C_NAME "ls7a_dc_i2c"
#define DC_I2C_BUS_MAX 2

/* Loongson 7A display controller proprietary GPIOs */
#define LS7A_DC_GPIO_CFG_OFFSET (0x1660)
#define LS7A_DC_GPIO_IN_OFFSET (0x1650)
#define LS7A_DC_GPIO_OUT_OFFSET (0x1650)

struct loongson_drm_device;

struct loongson_i2c {
	struct loongson_drm_device *ldev;
	struct i2c_client *ddc_client;
	struct i2c_adapter *adapter;
	u32 data, clock;
	bool use, init;
	u32 i2c_id;
};

int loongson_i2c_init(struct loongson_drm_device *ldev);

#endif