75 lines
1.4 KiB
C
75 lines
1.4 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/clk.c:
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* Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
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*/
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#include <common.h>
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#include <clk-uclass.h>
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#include <dm.h>
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#include <errno.h>
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#include <asm/io.h>
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#include <linux/bitops.h>
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#define MAX_CLKS 32
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struct bcm6345_clk_priv {
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void __iomem *regs;
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};
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static int bcm6345_clk_enable(struct clk *clk)
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{
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struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev);
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if (clk->id >= MAX_CLKS)
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return -EINVAL;
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setbits_be32(priv->regs, BIT(clk->id));
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return 0;
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}
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static int bcm6345_clk_disable(struct clk *clk)
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{
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struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev);
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if (clk->id >= MAX_CLKS)
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return -EINVAL;
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clrbits_be32(priv->regs, BIT(clk->id));
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return 0;
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}
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static struct clk_ops bcm6345_clk_ops = {
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.disable = bcm6345_clk_disable,
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.enable = bcm6345_clk_enable,
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};
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static const struct udevice_id bcm6345_clk_ids[] = {
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{ .compatible = "brcm,bcm6345-clk" },
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{ /* sentinel */ }
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};
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static int bcm63xx_clk_probe(struct udevice *dev)
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{
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struct bcm6345_clk_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(clk_bcm6345) = {
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.name = "clk_bcm6345",
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.id = UCLASS_CLK,
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.of_match = bcm6345_clk_ids,
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.ops = &bcm6345_clk_ops,
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.probe = bcm63xx_clk_probe,
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.priv_auto = sizeof(struct bcm6345_clk_priv),
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};
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