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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>
106 lines
2.0 KiB
C
106 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2019, Linaro Limited
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*/
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#include <log.h>
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#include <malloc.h>
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#include <asm/io.h>
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#include <common.h>
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#include <dm.h>
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#include <dt-bindings/reset/ti-syscon.h>
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#include <reset-uclass.h>
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#include <linux/bitops.h>
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struct hisi_reset_priv {
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void __iomem *base;
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};
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static int hisi_reset_deassert(struct reset_ctl *rst)
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{
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struct hisi_reset_priv *priv = dev_get_priv(rst->dev);
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u32 val;
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val = readl(priv->base + rst->data);
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if (rst->polarity & DEASSERT_SET)
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val |= BIT(rst->id);
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else
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val &= ~BIT(rst->id);
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writel(val, priv->base + rst->data);
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return 0;
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}
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static int hisi_reset_assert(struct reset_ctl *rst)
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{
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struct hisi_reset_priv *priv = dev_get_priv(rst->dev);
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u32 val;
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val = readl(priv->base + rst->data);
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if (rst->polarity & ASSERT_SET)
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val |= BIT(rst->id);
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else
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val &= ~BIT(rst->id);
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writel(val, priv->base + rst->data);
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return 0;
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}
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static int hisi_reset_of_xlate(struct reset_ctl *rst,
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struct ofnode_phandle_args *args)
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{
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unsigned long polarity;
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switch (args->args_count) {
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case 2:
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polarity = ASSERT_SET;
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break;
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case 3:
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polarity = args->args[2];
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break;
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default:
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debug("Invalid args_count: %d\n", args->args_count);
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return -EINVAL;
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}
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/* Use .data field as register offset and .id field as bit shift */
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rst->data = args->args[0];
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rst->id = args->args[1];
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rst->polarity = polarity;
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return 0;
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}
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static const struct reset_ops hisi_reset_reset_ops = {
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.of_xlate = hisi_reset_of_xlate,
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.rst_assert = hisi_reset_assert,
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.rst_deassert = hisi_reset_deassert,
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};
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static const struct udevice_id hisi_reset_ids[] = {
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{ .compatible = "hisilicon,hi3798cv200-reset" },
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{ }
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};
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static int hisi_reset_probe(struct udevice *dev)
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{
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struct hisi_reset_priv *priv = dev_get_priv(dev);
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priv->base = dev_remap_addr(dev);
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if (!priv->base)
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return -ENOMEM;
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return 0;
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}
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U_BOOT_DRIVER(hisi_reset) = {
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.name = "hisilicon_reset",
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.id = UCLASS_RESET,
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.of_match = hisi_reset_ids,
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.ops = &hisi_reset_reset_ops,
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.probe = hisi_reset_probe,
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.priv_auto = sizeof(struct hisi_reset_priv),
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};
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