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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>
86 lines
1.8 KiB
C
86 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Texas Instruments DRA7 reset driver
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*
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* Copyright (C) 2019 Texas Instruments Incorporated - https://www.ti.com/
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* Author: Keerthy <j-keerthy@ti.com>
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*/
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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 <reset-uclass.h>
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#include <dm/device_compat.h>
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struct dra7_reset_priv {
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u32 rstctrl;
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u32 rstst;
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u8 nreset;
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};
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static inline void dra7_reset_rmw(u32 addr, u32 value, u32 mask)
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{
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writel(((readl(addr) & (~mask)) | (value & mask)), addr);
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}
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static int dra7_reset_deassert(struct reset_ctl *reset_ctl)
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{
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struct dra7_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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int mask = 1 << reset_ctl->id;
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if (reset_ctl->id < 0 || reset_ctl->id >= priv->nreset)
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return -EINVAL;
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dra7_reset_rmw(priv->rstctrl, 0x0, mask);
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while ((readl(priv->rstst) & mask) != mask)
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;
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return 0;
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}
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static int dra7_reset_assert(struct reset_ctl *reset_ctl)
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{
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struct dra7_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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int mask = 1 << reset_ctl->id;
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if (reset_ctl->id < 0 || reset_ctl->id >= priv->nreset)
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return -EINVAL;
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dra7_reset_rmw(priv->rstctrl, mask, 0x0);
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return 0;
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}
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struct reset_ops dra7_reset_ops = {
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.rst_assert = dra7_reset_assert,
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.rst_deassert = dra7_reset_deassert,
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};
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static const struct udevice_id dra7_reset_ids[] = {
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{ .compatible = "ti,dra7-reset" },
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{ }
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};
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static int dra7_reset_probe(struct udevice *dev)
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{
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struct dra7_reset_priv *priv = dev_get_priv(dev);
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priv->rstctrl = dev_read_addr(dev);
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priv->rstst = priv->rstctrl + 0x4;
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priv->nreset = dev_read_u32_default(dev, "ti,nresets", 1);
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dev_info(dev, "dra7-reset successfully probed %s\n", dev->name);
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return 0;
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}
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U_BOOT_DRIVER(dra7_reset) = {
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.name = "dra7_reset",
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.id = UCLASS_RESET,
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.of_match = dra7_reset_ids,
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.probe = dra7_reset_probe,
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.ops = &dra7_reset_ops,
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.priv_auto = sizeof(struct dra7_reset_priv),
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};
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