forked from Mirrors/opensbi
6f1fe98c2f
The allwinner,sun20i-d1-clint compatible string is not documented in any official binding, so it should not be used by drivers. The MSWI in the D1 CLINT is compatible with the ACLINT specification, so it can take advantage of generic driver support. However, that is only possible if the MSWI and MTIMER are split into separate DT nodes. This means the final binding for this device is likely to be incompatible with what is implemented here. Remove this compatible string from the driver to prevent it from appearing in a stable version and causing future issues. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Anup Patel <anup@brainfault.org>
69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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*/
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#include <sbi/sbi_error.h>
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#include <sbi_utils/fdt/fdt_helper.h>
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#include <sbi_utils/ipi/fdt_ipi.h>
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#include <sbi_utils/ipi/aclint_mswi.h>
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#define MSWI_MAX_NR 16
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static unsigned long mswi_count = 0;
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static struct aclint_mswi_data mswi[MSWI_MAX_NR];
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static int ipi_mswi_cold_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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unsigned long offset;
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struct aclint_mswi_data *ms;
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if (MSWI_MAX_NR <= mswi_count)
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return SBI_ENOSPC;
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ms = &mswi[mswi_count];
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rc = fdt_parse_aclint_node(fdt, nodeoff, false,
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&ms->addr, &ms->size, NULL, NULL,
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&ms->first_hartid, &ms->hart_count);
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if (rc)
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return rc;
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if (match->data) {
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/* Adjust MSWI address and size for CLINT device */
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offset = *((unsigned long *)match->data);
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ms->addr += offset;
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if ((ms->size - offset) < ACLINT_MSWI_SIZE)
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return SBI_EINVAL;
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ms->size = ACLINT_MSWI_SIZE;
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}
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rc = aclint_mswi_cold_init(ms);
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if (rc)
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return rc;
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mswi_count++;
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return 0;
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}
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static const unsigned long clint_offset = CLINT_MSWI_OFFSET;
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static const struct fdt_match ipi_mswi_match[] = {
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{ .compatible = "riscv,clint0", .data = &clint_offset },
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{ .compatible = "sifive,clint0", .data = &clint_offset },
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{ .compatible = "riscv,aclint-mswi" },
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{ },
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};
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struct fdt_ipi fdt_ipi_mswi = {
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.match_table = ipi_mswi_match,
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.cold_init = ipi_mswi_cold_init,
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.warm_init = aclint_mswi_warm_init,
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.exit = NULL,
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};
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