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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
*/
#define LOG_CATEGORY UCLASS_CLK
#include <common.h>
#include <clk-uclass.h>
#include <dm.h>
#include <log.h>
#include <dm/device-internal.h>
#include <linux/clk-provider.h>
#define UBOOT_DM_CLK_FIXED_RATE "fixed_rate_clock"
#define UBOOT_DM_CLK_FIXED_RATE_RAW "fixed_rate_raw_clock"
static ulong clk_fixed_rate_get_rate(struct clk *clk)
{
return to_clk_fixed_rate(clk->dev)->fixed_rate;
}
/* avoid clk_enable() return -ENOSYS */
static int dummy_enable(struct clk *clk)
{
return 0;
}
const struct clk_ops clk_fixed_rate_ops = {
.get_rate = clk_fixed_rate_get_rate,
.enable = dummy_enable,
.disable = dummy_enable,
};
void clk_fixed_rate_ofdata_to_plat_(struct udevice *dev,
struct clk_fixed_rate *plat)
{
struct clk *clk = &plat->clk;
if (CONFIG_IS_ENABLED(OF_REAL))
plat->fixed_rate = dev_read_u32_default(dev, "clock-frequency",
0);
/* Make fixed rate clock accessible from higher level struct clk */
/* FIXME: This is not allowed */
dev_set_uclass_priv(dev, clk);
clk->dev = dev;
clk->enable_count = 0;
}
static ulong clk_fixed_rate_raw_get_rate(struct clk *clk)
{
return container_of(clk, struct clk_fixed_rate, clk)->fixed_rate;
}
const struct clk_ops clk_fixed_rate_raw_ops = {
.get_rate = clk_fixed_rate_raw_get_rate,
};
static int clk_fixed_rate_of_to_plat(struct udevice *dev)
{
clk_fixed_rate_ofdata_to_plat_(dev, to_clk_fixed_rate(dev));
return 0;
}
#if CONFIG_IS_ENABLED(CLK_CCF)
struct clk *clk_register_fixed_rate(struct device *dev, const char *name,
ulong rate)
{
struct clk *clk;
struct clk_fixed_rate *fixed;
int ret;
fixed = kzalloc(sizeof(*fixed), GFP_KERNEL);
if (!fixed)
return ERR_PTR(-ENOMEM);
fixed->fixed_rate = rate;
clk = &fixed->clk;
ret = clk_register(clk, UBOOT_DM_CLK_FIXED_RATE_RAW, name, NULL);
if (ret) {
kfree(fixed);
return ERR_PTR(ret);
}
return clk;
}
#endif
static const struct udevice_id clk_fixed_rate_match[] = {
{
.compatible = "fixed-clock",
},
{ /* sentinel */ }
};
U_BOOT_DRIVER(fixed_clock) = {
.name = "fixed_clock",
.id = UCLASS_CLK,
.of_match = clk_fixed_rate_match,
.of_to_plat = clk_fixed_rate_of_to_plat,
.plat_auto = sizeof(struct clk_fixed_rate),
.ops = &clk_fixed_rate_ops,
.flags = DM_FLAG_PRE_RELOC,
};
U_BOOT_DRIVER(clk_fixed_rate_raw) = {
.name = UBOOT_DM_CLK_FIXED_RATE_RAW,
.id = UCLASS_CLK,
.ops = &clk_fixed_rate_raw_ops,
.flags = DM_FLAG_PRE_RELOC,
};
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