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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>
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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.platdata_auto = sizeof(struct clk_fixed_factor),
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.ops = &clk_fixed_factor_ops,
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};
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