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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>
108 lines
2.5 KiB
C
108 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2020 ASPEED Technology Inc.
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*/
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#include <common.h>
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#include <dm.h>
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#include <log.h>
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#include <misc.h>
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#include <reset.h>
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#include <reset-uclass.h>
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#include <linux/err.h>
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#include <asm/io.h>
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#include <asm/arch/scu_ast2600.h>
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struct ast2600_reset_priv {
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struct ast2600_scu *scu;
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};
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static int ast2600_reset_assert(struct reset_ctl *reset_ctl)
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{
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struct ast2600_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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struct ast2600_scu *scu = priv->scu;
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debug("%s: reset_ctl->id: %lu\n", __func__, reset_ctl->id);
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if (reset_ctl->id < 32)
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writel(BIT(reset_ctl->id), &scu->modrst_ctrl1);
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else
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writel(BIT(reset_ctl->id - 32), &scu->modrst_ctrl2);
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return 0;
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}
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static int ast2600_reset_deassert(struct reset_ctl *reset_ctl)
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{
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struct ast2600_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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struct ast2600_scu *scu = priv->scu;
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debug("%s: reset_ctl->id: %lu\n", __func__, reset_ctl->id);
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if (reset_ctl->id < 32)
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writel(BIT(reset_ctl->id), &scu->modrst_clr1);
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else
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writel(BIT(reset_ctl->id - 32), &scu->modrst_clr2);
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return 0;
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}
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static int ast2600_reset_status(struct reset_ctl *reset_ctl)
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{
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struct ast2600_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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struct ast2600_scu *scu = priv->scu;
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int status;
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debug("%s: reset_ctl->id: %lu\n", __func__, reset_ctl->id);
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if (reset_ctl->id < 32)
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status = BIT(reset_ctl->id) & readl(&scu->modrst_ctrl1);
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else
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status = BIT(reset_ctl->id - 32) & readl(&scu->modrst_ctrl2);
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return !!status;
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}
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static int ast2600_reset_probe(struct udevice *dev)
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{
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int rc;
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struct ast2600_reset_priv *priv = dev_get_priv(dev);
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struct udevice *scu_dev;
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/* get SCU base from clock device */
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rc = uclass_get_device_by_driver(UCLASS_CLK,
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DM_DRIVER_GET(aspeed_ast2600_scu), &scu_dev);
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if (rc) {
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debug("%s: clock device not found, rc=%d\n", __func__, rc);
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return rc;
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}
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priv->scu = devfdt_get_addr_ptr(scu_dev);
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if (IS_ERR_OR_NULL(priv->scu)) {
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debug("%s: invalid SCU base pointer\n", __func__);
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return PTR_ERR(priv->scu);
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}
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return 0;
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}
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static const struct udevice_id ast2600_reset_ids[] = {
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{ .compatible = "aspeed,ast2600-reset" },
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{ }
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};
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struct reset_ops ast2600_reset_ops = {
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.rst_assert = ast2600_reset_assert,
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.rst_deassert = ast2600_reset_deassert,
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.rst_status = ast2600_reset_status,
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};
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U_BOOT_DRIVER(ast2600_reset) = {
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.name = "ast2600_reset",
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.id = UCLASS_RESET,
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.of_match = ast2600_reset_ids,
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.probe = ast2600_reset_probe,
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.ops = &ast2600_reset_ops,
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.priv_auto = sizeof(struct ast2600_reset_priv),
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};
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