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https://github.com/brain-hackers/u-boot-brain
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41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
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*
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* Derived from linux/arch/mips/bcm63xx/reset.c:
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* Copyright (C) 2012 Jonas Gorski <jonas.gorski@gmail.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <log.h>
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#include <malloc.h>
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#include <reset-uclass.h>
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#include <asm/io.h>
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#define MAX_RESETS 32
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struct bcm6345_reset_priv {
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void __iomem *regs;
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};
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static int bcm6345_reset_assert(struct reset_ctl *rst)
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{
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struct bcm6345_reset_priv *priv = dev_get_priv(rst->dev);
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clrbits_be32(priv->regs, BIT(rst->id));
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mdelay(20);
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return 0;
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}
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static int bcm6345_reset_deassert(struct reset_ctl *rst)
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{
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struct bcm6345_reset_priv *priv = dev_get_priv(rst->dev);
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setbits_be32(priv->regs, BIT(rst->id));
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mdelay(20);
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return 0;
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}
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static int bcm6345_reset_free(struct reset_ctl *rst)
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{
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return 0;
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}
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static int bcm6345_reset_request(struct reset_ctl *rst)
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{
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if (rst->id >= MAX_RESETS)
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return -EINVAL;
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return bcm6345_reset_assert(rst);
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}
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struct reset_ops bcm6345_reset_reset_ops = {
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.rfree = bcm6345_reset_free,
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.request = bcm6345_reset_request,
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.rst_assert = bcm6345_reset_assert,
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.rst_deassert = bcm6345_reset_deassert,
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};
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static const struct udevice_id bcm6345_reset_ids[] = {
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{ .compatible = "brcm,bcm6345-reset" },
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{ /* sentinel */ }
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};
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static int bcm6345_reset_probe(struct udevice *dev)
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{
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struct bcm6345_reset_priv *priv = dev_get_priv(dev);
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priv->regs = dev_remap_addr(dev);
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if (!priv->regs)
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return -EINVAL;
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return 0;
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}
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U_BOOT_DRIVER(bcm6345_reset) = {
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.name = "bcm6345-reset",
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.id = UCLASS_RESET,
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.of_match = bcm6345_reset_ids,
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.ops = &bcm6345_reset_reset_ops,
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.probe = bcm6345_reset_probe,
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.priv_auto = sizeof(struct bcm6345_reset_priv),
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};
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