mirror of
https://github.com/riscv-software-src/opensbi.git
synced 2025-08-26 00:11:32 +01:00
e9d08bd99c
Starfive JH7110 I2C IP is synopsys designware. Minimum StarFIve I2C driver to read/send bytes over I2C bus. This allows querying information and perform operation of onboard PMIC, as well as power-off and reset. Signed-off-by: Minda Chen <minda.chen@starfivetech.com> Reviewed-by: Anup Patel <anup@brainfault.org>
63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
/*
|
|
* 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,
|
|
};
|