forked from Mirrors/opensbi
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
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2022 starfivetech.com
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*
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* Authors:
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* Minda Chen <minda.chen@starfivetech.com>
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*/
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#include <sbi/riscv_io.h>
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#include <sbi/sbi_error.h>
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#include <sbi/sbi_string.h>
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#include <sbi_utils/fdt/fdt_helper.h>
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#include <sbi_utils/i2c/dw_i2c.h>
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#include <sbi_utils/i2c/fdt_i2c.h>
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#define FDT_DW_I2C_ADAPTER_MAX 7
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static unsigned int fdt_dw_i2c_adapter_count;
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static struct dw_i2c_adapter
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fdt_dw_i2c_adapter_array[FDT_DW_I2C_ADAPTER_MAX];
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extern struct fdt_i2c_adapter fdt_i2c_adapter_dw;
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static int fdt_dw_i2c_init(void *fdt, int nodeoff,
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const struct fdt_match *match)
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{
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int rc;
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struct dw_i2c_adapter *adapter;
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u64 addr;
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if (fdt_dw_i2c_adapter_count >= FDT_DW_I2C_ADAPTER_MAX)
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return SBI_ENOSPC;
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adapter = &fdt_dw_i2c_adapter_array[fdt_dw_i2c_adapter_count];
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rc = fdt_get_node_addr_size(fdt, nodeoff, 0, &addr, NULL);
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if (rc)
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return rc;
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adapter->addr = addr;
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adapter->adapter.driver = &fdt_i2c_adapter_dw;
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rc = dw_i2c_init(&adapter->adapter, nodeoff);
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if (rc)
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return rc;
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fdt_dw_i2c_adapter_count++;
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return 0;
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}
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static const struct fdt_match fdt_dw_i2c_match[] = {
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{ .compatible = "snps,designware-i2c" },
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{ .compatible = "starfive,jh7110-i2c" },
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{ },
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};
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struct fdt_i2c_adapter fdt_i2c_adapter_dw = {
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.match_table = fdt_dw_i2c_match,
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.init = fdt_dw_i2c_init,
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};
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