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https://github.com/AsahiLinux/u-boot
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caa4daa2ae
We use 'priv' for private data but often use 'platdata' for platform data. We can't really use 'pdata' since that is ambiguous (it could mean private or platform data). Rename some of the latter variables to end with 'plat' for consistency. Signed-off-by: Simon Glass <sjg@chromium.org>
72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2019 Western Digital Corporation or its affiliates.
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*
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* Author: Anup Patel <anup.patel@wdc.com>
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*/
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#include <common.h>
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#include <clk-uclass.h>
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#include <div64.h>
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#include <dm.h>
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#include <linux/err.h>
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struct clk_fixed_factor {
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struct clk parent;
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unsigned int div;
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unsigned int mult;
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};
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#define to_clk_fixed_factor(dev) \
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((struct clk_fixed_factor *)dev_get_platdata(dev))
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static ulong clk_fixed_factor_get_rate(struct clk *clk)
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{
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uint64_t rate;
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struct clk_fixed_factor *ff = to_clk_fixed_factor(clk->dev);
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rate = clk_get_rate(&ff->parent);
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if (IS_ERR_VALUE(rate))
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return rate;
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do_div(rate, ff->div);
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return rate * ff->mult;
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}
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const struct clk_ops clk_fixed_factor_ops = {
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.get_rate = clk_fixed_factor_get_rate,
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};
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static int clk_fixed_factor_ofdata_to_platdata(struct udevice *dev)
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{
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#if !CONFIG_IS_ENABLED(OF_PLATDATA)
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int err;
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struct clk_fixed_factor *ff = to_clk_fixed_factor(dev);
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err = clk_get_by_index(dev, 0, &ff->parent);
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if (err)
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return err;
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ff->div = dev_read_u32_default(dev, "clock-div", 1);
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ff->mult = dev_read_u32_default(dev, "clock-mult", 1);
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#endif
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return 0;
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}
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static const struct udevice_id clk_fixed_factor_match[] = {
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{
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.compatible = "fixed-factor-clock",
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},
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{ /* sentinel */ }
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};
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U_BOOT_DRIVER(clk_fixed_factor) = {
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.name = "fixed_factor_clock",
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.id = UCLASS_CLK,
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.of_match = clk_fixed_factor_match,
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.ofdata_to_platdata = clk_fixed_factor_ofdata_to_platdata,
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.plat_auto = sizeof(struct clk_fixed_factor),
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.ops = &clk_fixed_factor_ops,
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};
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