Signed-off-by: Patrice Chotard <patrice.chotard@st.com> Reviewed-by: Simon Glass <sjg@chromium.org>master
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/*
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* (C) Copyright 2017 Patrice Chotard <patrice.chotard@st.com> |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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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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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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error("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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error("%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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error("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->base; |
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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_alloc_size = sizeof(struct sti_sysreset_priv), |
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}; |
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