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https://github.com/AsahiLinux/u-boot
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61040097a9
Add support for at91 reset controller's basic assert/deassert operations. Since this driver conflicts with the SYSRESET driver because they both bind to the same RSTC node, implement a custom bind hook that would manually bind the sysreset driver, if enabled, to the same RSTC DT node. Furthermore, delete the no longer needed compatibles from the SYSRESET driver and rename it to make sure than any possible conflicts are avoided. Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com> Tested-by: Mihai Sain <mihai.sain@microchip.com> Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
// 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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U_BOOT_DRIVER(sysreset_at91) = {
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.id = UCLASS_SYSRESET,
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.name = "at91_sysreset",
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.ops = &at91_sysreset,
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.probe = at91_sysreset_probe,
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};
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