/*
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2022 starfivetech.com
 *
 * Authors:
 *   Minda Chen <minda.chen@starfivetech.com>
 */

#include <sbi/riscv_io.h>
#include <sbi/sbi_error.h>
#include <sbi/sbi_string.h>
#include <sbi_utils/fdt/fdt_helper.h>
#include <sbi_utils/i2c/dw_i2c.h>
#include <sbi_utils/i2c/fdt_i2c.h>

#define FDT_DW_I2C_ADAPTER_MAX	7

static unsigned int fdt_dw_i2c_adapter_count;
static struct dw_i2c_adapter
	fdt_dw_i2c_adapter_array[FDT_DW_I2C_ADAPTER_MAX];

extern struct fdt_i2c_adapter fdt_i2c_adapter_dw;

static int fdt_dw_i2c_init(void *fdt, int nodeoff,
			     const struct fdt_match *match)
{
	int rc;
	struct dw_i2c_adapter *adapter;
	u64 addr;

	if (fdt_dw_i2c_adapter_count >= FDT_DW_I2C_ADAPTER_MAX)
		return SBI_ENOSPC;

	adapter = &fdt_dw_i2c_adapter_array[fdt_dw_i2c_adapter_count];

	rc = fdt_get_node_addr_size(fdt, nodeoff, 0, &addr, NULL);
	if (rc)
		return rc;

	adapter->addr = addr;
	adapter->adapter.driver = &fdt_i2c_adapter_dw;

	rc = dw_i2c_init(&adapter->adapter, nodeoff);
	if (rc)
		return rc;

	fdt_dw_i2c_adapter_count++;

	return 0;
}

static const struct fdt_match fdt_dw_i2c_match[] = {
	{ .compatible = "snps,designware-i2c" },
	{ .compatible = "starfive,jh7110-i2c" },
	{ },
};

struct fdt_i2c_adapter fdt_i2c_adapter_dw = {
	.match_table = fdt_dw_i2c_match,
	.init = fdt_dw_i2c_init,
};