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https://github.com/riscv-software-src/opensbi.git
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e3d6919d10
We add generic GPIO reset driver inspired from gpio-restart and gpio-poweroff drivers of Linux kernel. Signed-off-by: Green Wan <green.wan@sifive.com> Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2020 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/sbi_scratch.h>
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#include <sbi_utils/fdt/fdt_helper.h>
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#include <sbi_utils/reset/fdt_reset.h>
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extern struct fdt_reset fdt_reset_gpio;
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extern struct fdt_reset fdt_reset_sifive_test;
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extern struct fdt_reset fdt_reset_htif;
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extern struct fdt_reset fdt_reset_thead;
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static struct fdt_reset *reset_drivers[] = {
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&fdt_reset_gpio,
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&fdt_reset_sifive_test,
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&fdt_reset_htif,
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&fdt_reset_thead,
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};
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static struct fdt_reset *current_driver = NULL;
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int fdt_reset_init(void)
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{
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int pos, noff, rc;
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struct fdt_reset *drv;
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const struct fdt_match *match;
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void *fdt = sbi_scratch_thishart_arg1_ptr();
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for (pos = 0; pos < array_size(reset_drivers); pos++) {
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drv = reset_drivers[pos];
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noff = fdt_find_match(fdt, -1, drv->match_table, &match);
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if (noff < 0)
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continue;
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if (drv->init) {
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rc = drv->init(fdt, noff, match);
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if (rc == SBI_ENODEV)
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continue;
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if (rc)
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return rc;
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}
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current_driver = drv;
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break;
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}
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return 0;
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}
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