clk_fixed_rate.c
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/*
* Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <clk-uclass.h>
#include <dm.h>
struct clk_fixed_rate {
unsigned long fixed_rate;
};
#define to_clk_fixed_rate(dev) ((struct clk_fixed_rate *)dev_get_platdata(dev))
static ulong clk_fixed_rate_get_rate(struct clk *clk)
{
if (clk->id != 0)
return -EINVAL;
return to_clk_fixed_rate(clk->dev)->fixed_rate;
}
const struct clk_ops clk_fixed_rate_ops = {
.get_rate = clk_fixed_rate_get_rate,
};
static int clk_fixed_rate_ofdata_to_platdata(struct udevice *dev)
{
#if !CONFIG_IS_ENABLED(OF_PLATDATA)
to_clk_fixed_rate(dev)->fixed_rate =
dev_read_u32_default(dev, "clock-frequency", 0);
#endif
return 0;
}
static const struct udevice_id clk_fixed_rate_match[] = {
{
.compatible = "fixed-clock",
},
{ /* sentinel */ }
};
U_BOOT_DRIVER(clk_fixed_rate) = {
.name = "fixed_rate_clock",
.id = UCLASS_CLK,
.of_match = clk_fixed_rate_match,
.ofdata_to_platdata = clk_fixed_rate_ofdata_to_platdata,
.platdata_auto_alloc_size = sizeof(struct clk_fixed_rate),
.ops = &clk_fixed_rate_ops,
};