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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 commit c8ffd1356d42223cbb8c86280a083cc3c93e6426, reversing changes made to 2ee6f3a5f7550de3599faef9704e166e5dcace35. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
111 lines
2.6 KiB
C
111 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2017 Google, Inc
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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_ast2500.h>
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struct ast2500_reset_priv {
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struct ast2500_scu *scu;
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};
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static int ast2500_reset_assert(struct reset_ctl *reset_ctl)
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{
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struct ast2500_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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struct ast2500_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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setbits_le32(&scu->sysreset_ctrl1, BIT(reset_ctl->id));
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else
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setbits_le32(&scu->sysreset_ctrl2, BIT(reset_ctl->id - 32));
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return 0;
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}
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static int ast2500_reset_deassert(struct reset_ctl *reset_ctl)
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{
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struct ast2500_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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struct ast2500_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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clrbits_le32(&scu->sysreset_ctrl1, BIT(reset_ctl->id));
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else
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clrbits_le32(&scu->sysreset_ctrl2, BIT(reset_ctl->id - 32));
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return 0;
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}
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static int ast2500_reset_status(struct reset_ctl *reset_ctl)
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{
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struct ast2500_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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struct ast2500_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->sysreset_ctrl1);
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else
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status = BIT(reset_ctl->id - 32) & readl(&scu->sysreset_ctrl2);
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return !!status;
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}
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static int ast2500_reset_probe(struct udevice *dev)
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{
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int rc;
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struct ast2500_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_ast2500_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 ast2500_reset_ids[] = {
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{ .compatible = "aspeed,ast2500-reset" },
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{ }
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};
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struct reset_ops ast2500_reset_ops = {
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.rst_assert = ast2500_reset_assert,
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.rst_deassert = ast2500_reset_deassert,
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.rst_status = ast2500_reset_status,
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};
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U_BOOT_DRIVER(ast2500_reset) = {
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.name = "ast2500_reset",
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.id = UCLASS_RESET,
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.of_match = ast2500_reset_ids,
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.probe = ast2500_reset_probe,
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.ops = &ast2500_reset_ops,
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.priv_auto = sizeof(struct ast2500_reset_priv),
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};
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