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,
29 .disable = dummy_enable,
32 void clk_fixed_rate_ofdata_to_plat_(struct udevice *dev,
33 struct clk_fixed_rate *plat)
35 struct clk *clk = &plat->clk;
36 if (CONFIG_IS_ENABLED(OF_REAL))
37 plat->fixed_rate = dev_read_u32_default(dev, "clock-frequency",
40 /* Make fixed rate clock accessible from higher level struct clk */
41 /* FIXME: This is not allowed */
42 dev_set_uclass_priv(dev, clk);
45 clk->enable_count = 0;
48 static ulong clk_fixed_rate_raw_get_rate(struct clk *clk)
50 return container_of(clk, struct clk_fixed_rate, clk)->fixed_rate;
53 const struct clk_ops clk_fixed_rate_raw_ops = {
54 .get_rate = clk_fixed_rate_raw_get_rate,
57 static int clk_fixed_rate_of_to_plat(struct udevice *dev)
59 clk_fixed_rate_ofdata_to_plat_(dev, to_clk_fixed_rate(dev));
64 #if CONFIG_IS_ENABLED(CLK_CCF)
65 struct clk *clk_register_fixed_rate(struct device *dev, const char *name,
69 struct clk_fixed_rate *fixed;
72 fixed = kzalloc(sizeof(*fixed), GFP_KERNEL);
74 return ERR_PTR(-ENOMEM);
76 fixed->fixed_rate = rate;
80 ret = clk_register(clk, UBOOT_DM_CLK_FIXED_RATE_RAW, name, NULL);
90 static const struct udevice_id clk_fixed_rate_match[] = {
92 .compatible = "fixed-clock",
97 U_BOOT_DRIVER(fixed_clock) = {
98 .name = "fixed_clock",
100 .of_match = clk_fixed_rate_match,
101 .of_to_plat = clk_fixed_rate_of_to_plat,
102 .plat_auto = sizeof(struct clk_fixed_rate),
103 .ops = &clk_fixed_rate_ops,
104 .flags = DM_FLAG_PRE_RELOC,
107 U_BOOT_DRIVER(clk_fixed_rate_raw) = {
108 .name = UBOOT_DM_CLK_FIXED_RATE_RAW,
110 .ops = &clk_fixed_rate_raw_ops,
111 .flags = DM_FLAG_PRE_RELOC,