mirror of
https://github.com/AsahiLinux/u-boot
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65e25bea59
In the spirit of using the same base name for all of these related macros, rename this to have the operation at the end. This is not widely used so the impact is fairly small. Signed-off-by: Simon Glass <sjg@chromium.org>
109 lines
2.5 KiB
C
109 lines
2.5 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_request(struct reset_ctl *reset_ctl)
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{
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debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
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reset_ctl->dev, reset_ctl->id);
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return 0;
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}
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static int ast2500_reset_free(struct reset_ctl *reset_ctl)
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{
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debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
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reset_ctl->dev, reset_ctl->id);
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return 0;
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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_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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.request = ast2500_reset_request,
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.rfree = ast2500_reset_free,
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.rst_assert = ast2500_reset_assert,
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.rst_deassert = ast2500_reset_deassert,
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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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