Firmware/opensbi
8
0
Fork 0
forked from Mirrors/opensbi
Code Pull Requests Activity

lib: utils/i2c: Add minimal StarFive jh7110 I2C driver

Browse Source 
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>
This commit is contained in:
Minda Chen
2023-03-09 14:19:58 +08:00
committed by Anup Patel
parent 4b28afc98b
commit e9d08bd99c
5 changed files with 286 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
lib/utils/i2c/fdt_i2c_dw.c Normal file
View File

@@ -0,0 +1,62 @@
/*
* 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,
};