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https://github.com/AsahiLinux/u-boot
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486942184a
The new type sysreset 'POWER_OFF', introduced by
commit 751fed426f ("sysreset: Add a way to find the last reset")
is only supported for "syscon-poweroff" compatible.
For details see Linux binding:
./Documentation/devicetree/bindings/power/reset/syscon-poweroff.txt
This patch removes the support of POWER_OFF for "syscon-reboot"
and keeps only the COLD reset (for command reset support)
and it introduces the compatible "syscon-poweroff"
for the POWER_OFF case.
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
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*
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* Derived from linux/drivers/power/reset/syscon-reboot.c:
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* Copyright (C) 2013, Applied Micro Circuits Corporation
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* Author: Feng Kan <fkan@apm.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 <regmap.h>
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#include <sysreset.h>
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#include <syscon.h>
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struct syscon_reboot_priv {
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struct regmap *regmap;
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unsigned int offset;
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unsigned int mask;
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};
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static int syscon_reboot_request(struct udevice *dev, enum sysreset_t type)
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{
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struct syscon_reboot_priv *priv = dev_get_priv(dev);
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ulong driver_data = dev_get_driver_data(dev);
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if (type != driver_data)
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return -EPROTONOSUPPORT;
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regmap_write(priv->regmap, priv->offset, priv->mask);
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return -EINPROGRESS;
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}
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static struct sysreset_ops syscon_reboot_ops = {
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.request = syscon_reboot_request,
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};
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int syscon_reboot_probe(struct udevice *dev)
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{
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struct syscon_reboot_priv *priv = dev_get_priv(dev);
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priv->regmap = syscon_regmap_lookup_by_phandle(dev, "regmap");
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if (IS_ERR(priv->regmap)) {
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pr_err("unable to find regmap\n");
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return -ENODEV;
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}
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priv->offset = dev_read_u32_default(dev, "offset", 0);
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priv->mask = dev_read_u32_default(dev, "mask", 0);
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return 0;
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}
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static const struct udevice_id syscon_reboot_ids[] = {
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{ .compatible = "syscon-reboot", .data = SYSRESET_COLD },
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{ .compatible = "syscon-poweroff", .data = SYSRESET_POWER_OFF },
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{ /* sentinel */ }
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};
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U_BOOT_DRIVER(syscon_reboot) = {
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.name = "syscon_reboot",
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.id = UCLASS_SYSRESET,
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.of_match = syscon_reboot_ids,
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.probe = syscon_reboot_probe,
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.priv_auto_alloc_size = sizeof(struct syscon_reboot_priv),
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.ops = &syscon_reboot_ops,
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};
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