58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2019 Pepperl+Fuchs
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* Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <sysreset.h>
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#include <asm/io.h>
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#include <asm/arch/reset_manager.h>
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#include <linux/bitops.h>
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struct socfpga_sysreset_data {
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void __iomem *rstmgr_base;
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};
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static int socfpga_sysreset_request(struct udevice *dev,
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enum sysreset_t type)
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{
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struct socfpga_sysreset_data *data = dev_get_priv(dev);
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switch (type) {
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case SYSRESET_WARM:
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writel(BIT(RSTMGR_CTRL_SWWARMRSTREQ_LSB),
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data->rstmgr_base + RSTMGR_CTRL);
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break;
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case SYSRESET_COLD:
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writel(BIT(RSTMGR_CTRL_SWCOLDRSTREQ_LSB),
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data->rstmgr_base + RSTMGR_CTRL);
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break;
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default:
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return -EPROTONOSUPPORT;
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}
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return -EINPROGRESS;
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}
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static int socfpga_sysreset_probe(struct udevice *dev)
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{
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struct socfpga_sysreset_data *data = dev_get_priv(dev);
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data->rstmgr_base = dev_read_addr_ptr(dev);
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return 0;
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}
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static struct sysreset_ops socfpga_sysreset = {
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.request = socfpga_sysreset_request,
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};
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U_BOOT_DRIVER(sysreset_socfpga) = {
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.id = UCLASS_SYSRESET,
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.name = "socfpga_sysreset",
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.priv_auto = sizeof(struct socfpga_sysreset_data),
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.ops = &socfpga_sysreset,
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.probe = socfpga_sysreset_probe,
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};
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