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https://github.com/AsahiLinux/u-boot
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41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017, STMicroelectronics - All Rights Reserved
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* Author(s): Patrice Chotard, <patrice.chotard@st.com> for STMicroelectronics.
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*/
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#include <common.h>
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#include <dm.h>
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#include <regmap.h>
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#include <syscon.h>
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#include <sysreset.h>
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#include <asm/io.h>
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#include <linux/bitops.h>
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DECLARE_GLOBAL_DATA_PTR;
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struct sti_sysreset_priv {
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phys_addr_t base;
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};
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static int sti_sysreset_request(struct udevice *dev, enum sysreset_t type)
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{
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struct sti_sysreset_priv *priv = dev_get_priv(dev);
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generic_clear_bit(0, (void __iomem *)priv->base);
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return -EINPROGRESS;
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}
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static int sti_sysreset_probe(struct udevice *dev)
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{
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struct sti_sysreset_priv *priv = dev_get_priv(dev);
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struct udevice *syscon;
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struct regmap *regmap;
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struct fdtdec_phandle_args syscfg_phandle;
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int ret;
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/* get corresponding syscon phandle */
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ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev_of_offset(dev),
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"st,syscfg", NULL, 0, 0,
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&syscfg_phandle);
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if (ret < 0) {
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pr_err("Can't get syscfg phandle: %d\n", ret);
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return ret;
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}
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ret = uclass_get_device_by_of_offset(UCLASS_SYSCON,
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syscfg_phandle.node,
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&syscon);
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if (ret) {
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pr_err("%s: uclass_get_device_by_of_offset failed: %d\n",
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__func__, ret);
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return ret;
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}
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regmap = syscon_get_regmap(syscon);
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if (!regmap) {
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pr_err("unable to get regmap for %s\n", syscon->name);
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return -ENODEV;
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}
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priv->base = regmap->ranges[0].start;
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return 0;
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}
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static struct sysreset_ops sti_sysreset = {
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.request = sti_sysreset_request,
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};
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static const struct udevice_id sti_sysreset_ids[] = {
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{ .compatible = "st,stih407-restart" },
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{ }
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};
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U_BOOT_DRIVER(sysreset_sti) = {
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.name = "sysreset_sti",
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.id = UCLASS_SYSRESET,
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.ops = &sti_sysreset,
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.probe = sti_sysreset_probe,
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.of_match = sti_sysreset_ids,
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.priv_auto = sizeof(struct sti_sysreset_priv),
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};
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