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https://github.com/AsahiLinux/u-boot
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72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2022 Microchip Technology, Inc. and its subsidiaries
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*/
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#include <asm/arch/hardware.h>
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#include <asm/io.h>
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#include <asm/arch/at91_rstc.h>
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#include <clk.h>
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#include <common.h>
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#include <cpu_func.h>
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#include <dm.h>
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#include <dm/device_compat.h>
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#include <dm/device-internal.h>
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#include <sysreset.h>
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static int at91_sysreset_request(struct udevice *dev, enum sysreset_t type)
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{
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at91_rstc_t *rstc = (at91_rstc_t *)dev_get_priv(dev);
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writel(AT91_RSTC_KEY
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| AT91_RSTC_CR_PROCRST /* Processor Reset */
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| AT91_RSTC_CR_PERRST /* Peripheral Reset */
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#ifdef CONFIG_AT91RESET_EXTRST
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| AT91_RSTC_CR_EXTRST /* External Reset (assert nRST pin) */
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#endif
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, &rstc->cr);
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return -EINPROGRESS;
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}
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static int at91_sysreset_probe(struct udevice *dev)
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{
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struct clk slck;
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void *priv;
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int ret;
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priv = dev_remap_addr(dev);
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if (!priv)
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return -EINVAL;
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dev_set_priv(dev, priv);
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ret = clk_get_by_index(dev, 0, &slck);
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if (ret)
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return ret;
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ret = clk_prepare_enable(&slck);
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if (ret)
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return ret;
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return 0;
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}
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static struct sysreset_ops at91_sysreset = {
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.request = at91_sysreset_request,
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};
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static const struct udevice_id a91_sysreset_ids[] = {
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{ .compatible = "atmel,sama5d3-rstc" },
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{ .compatible = "microchip,sam9x60-rstc" },
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{ }
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};
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U_BOOT_DRIVER(sysreset_at91) = {
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.id = UCLASS_SYSRESET,
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.name = "at91_reset",
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.ops = &at91_sysreset,
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.probe = at91_sysreset_probe,
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.of_match = a91_sysreset_ids,
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};
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