1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
7 #include <clk-uclass.h>
9 #include <dm/device-internal.h>
10 #include <linux/clk-provider.h>
12 #define UBOOT_DM_CLK_FIXED_RATE "fixed_rate_clock"
13 #define UBOOT_DM_CLK_FIXED_RATE_RAW "fixed_rate_raw_clock"
15 static ulong clk_fixed_rate_get_rate(struct clk *clk)
17 return to_clk_fixed_rate(clk->dev)->fixed_rate;
20 /* avoid clk_enable() return -ENOSYS */
21 static int dummy_enable(struct clk *clk)
26 const struct clk_ops clk_fixed_rate_ops = {
27 .get_rate = clk_fixed_rate_get_rate,
28 .enable = dummy_enable,
31 void clk_fixed_rate_ofdata_to_plat_(struct udevice *dev,
32 struct clk_fixed_rate *plat)
34 struct clk *clk = &plat->clk;
35 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
36 plat->fixed_rate = dev_read_u32_default(dev, "clock-frequency", 0);
38 /* Make fixed rate clock accessible from higher level struct clk */
39 /* FIXME: This is not allowed */
40 dev_set_uclass_priv(dev, clk);
43 clk->enable_count = 0;
46 static ulong clk_fixed_rate_raw_get_rate(struct clk *clk)
48 return container_of(clk, struct clk_fixed_rate, clk)->fixed_rate;
51 const struct clk_ops clk_fixed_rate_raw_ops = {
52 .get_rate = clk_fixed_rate_raw_get_rate,
55 static int clk_fixed_rate_of_to_plat(struct udevice *dev)
57 clk_fixed_rate_ofdata_to_plat_(dev, to_clk_fixed_rate(dev));
62 #if CONFIG_IS_ENABLED(CLK_CCF)
63 struct clk *clk_register_fixed_rate(struct device *dev, const char *name,
67 struct clk_fixed_rate *fixed;
70 fixed = kzalloc(sizeof(*fixed), GFP_KERNEL);
72 return ERR_PTR(-ENOMEM);
74 fixed->fixed_rate = rate;
78 ret = clk_register(clk, UBOOT_DM_CLK_FIXED_RATE_RAW, name, NULL);
88 static const struct udevice_id clk_fixed_rate_match[] = {
90 .compatible = "fixed-clock",
95 U_BOOT_DRIVER(fixed_clock) = {
96 .name = "fixed_clock",
98 .of_match = clk_fixed_rate_match,
99 .of_to_plat = clk_fixed_rate_of_to_plat,
100 .plat_auto = sizeof(struct clk_fixed_rate),
101 .ops = &clk_fixed_rate_ops,
102 .flags = DM_FLAG_PRE_RELOC,
105 U_BOOT_DRIVER(clk_fixed_rate_raw) = {
106 .name = UBOOT_DM_CLK_FIXED_RATE_RAW,
108 .ops = &clk_fixed_rate_raw_ops,
109 .flags = DM_FLAG_PRE_RELOC,