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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
82 lines
1.8 KiB
C
82 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2020 Sean Anderson
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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 <reset.h>
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#include <reset-uclass.h>
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#include <syscon.h>
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#include <linux/bitops.h>
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#include <linux/err.h>
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struct syscon_reset_priv {
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struct regmap *regmap;
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uint offset;
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uint mask;
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bool assert_high;
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};
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static int syscon_reset_request(struct reset_ctl *rst)
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{
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struct syscon_reset_priv *priv = dev_get_priv(rst->dev);
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if (BIT(rst->id) & priv->mask)
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return 0;
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else
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return -EINVAL;
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}
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static int syscon_reset_assert(struct reset_ctl *rst)
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{
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struct syscon_reset_priv *priv = dev_get_priv(rst->dev);
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return regmap_update_bits(priv->regmap, priv->offset, BIT(rst->id),
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priv->assert_high ? BIT(rst->id) : 0);
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}
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static int syscon_reset_deassert(struct reset_ctl *rst)
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{
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struct syscon_reset_priv *priv = dev_get_priv(rst->dev);
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return regmap_update_bits(priv->regmap, priv->offset, BIT(rst->id),
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priv->assert_high ? 0 : BIT(rst->id));
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}
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static const struct reset_ops syscon_reset_ops = {
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.request = syscon_reset_request,
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.rst_assert = syscon_reset_assert,
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.rst_deassert = syscon_reset_deassert,
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};
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int syscon_reset_probe(struct udevice *dev)
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{
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struct syscon_reset_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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return -ENODEV;
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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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priv->assert_high = dev_read_u32_default(dev, "assert-high", true);
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return 0;
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}
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static const struct udevice_id syscon_reset_ids[] = {
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{ .compatible = "syscon-reset" },
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{ },
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};
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U_BOOT_DRIVER(syscon_reset) = {
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.name = "syscon_reset",
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.id = UCLASS_RESET,
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.of_match = syscon_reset_ids,
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.probe = syscon_reset_probe,
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.priv_auto = sizeof(struct syscon_reset_priv),
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.ops = &syscon_reset_ops,
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};
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