1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2019 Western Digital Corporation or its affiliates.
5 * Author: Anup Patel <anup.patel@wdc.com>
9 #include <clk-uclass.h>
13 struct clk_fixed_factor {
19 #define to_clk_fixed_factor(dev) \
20 ((struct clk_fixed_factor *)dev_get_platdata(dev))
22 static ulong clk_fixed_factor_get_rate(struct clk *clk)
25 struct clk_fixed_factor *ff = to_clk_fixed_factor(clk->dev);
30 rate = clk_get_rate(&ff->parent);
31 if (IS_ERR_VALUE(rate))
34 do_div(rate, ff->div);
36 return rate * ff->mult;
39 const struct clk_ops clk_fixed_factor_ops = {
40 .get_rate = clk_fixed_factor_get_rate,
43 static int clk_fixed_factor_ofdata_to_platdata(struct udevice *dev)
45 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
47 struct clk_fixed_factor *ff = to_clk_fixed_factor(dev);
49 err = clk_get_by_index(dev, 0, &ff->parent);
53 ff->div = dev_read_u32_default(dev, "clock-div", 1);
54 ff->mult = dev_read_u32_default(dev, "clock-mult", 1);
60 static const struct udevice_id clk_fixed_factor_match[] = {
62 .compatible = "fixed-factor-clock",
67 U_BOOT_DRIVER(clk_fixed_factor) = {
68 .name = "fixed_factor_clock",
70 .of_match = clk_fixed_factor_match,
71 .ofdata_to_platdata = clk_fixed_factor_ofdata_to_platdata,
72 .platdata_auto_alloc_size = sizeof(struct clk_fixed_factor),
73 .ops = &clk_fixed_factor_ops,