1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2016, NVIDIA CORPORATION.
4 */
5
6 #include <common.h>
7 #include <dm.h>
8 #include <clk.h>
9 #include <malloc.h>
10 #include <asm/clk.h>
11 #include <dm/device_compat.h>
12 #include <linux/err.h>
13
14 static const char * const sandbox_clk_test_names[] = {
15 [SANDBOX_CLK_TEST_ID_FIXED] = "fixed",
16 [SANDBOX_CLK_TEST_ID_SPI] = "spi",
17 [SANDBOX_CLK_TEST_ID_I2C] = "i2c",
18 };
19
sandbox_clk_test_get(struct udevice * dev)20 int sandbox_clk_test_get(struct udevice *dev)
21 {
22 struct sandbox_clk_test *sbct = dev_get_priv(dev);
23 int i, ret;
24
25 for (i = 0; i < SANDBOX_CLK_TEST_NON_DEVM_COUNT; i++) {
26 ret = clk_get_by_name(dev, sandbox_clk_test_names[i],
27 &sbct->clks[i]);
28 if (ret)
29 return ret;
30 }
31
32 return 0;
33 }
34
sandbox_clk_test_devm_get(struct udevice * dev)35 int sandbox_clk_test_devm_get(struct udevice *dev)
36 {
37 struct sandbox_clk_test *sbct = dev_get_priv(dev);
38 struct clk *clk;
39
40 clk = devm_clk_get(dev, "no-an-existing-clock");
41 if (!IS_ERR(clk)) {
42 dev_err(dev, "devm_clk_get() should have failed\n");
43 return -EINVAL;
44 }
45
46 clk = devm_clk_get(dev, "uart2");
47 if (IS_ERR(clk))
48 return PTR_ERR(clk);
49 sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM1] = clk;
50
51 clk = devm_clk_get_optional(dev, "uart1");
52 if (IS_ERR(clk))
53 return PTR_ERR(clk);
54 sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM2] = clk;
55
56 sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM_NULL] = NULL;
57 clk = devm_clk_get_optional(dev, "not_an_existing_clock");
58 if (IS_ERR(clk))
59 return PTR_ERR(clk);
60 if (clk)
61 return -EINVAL;
62
63 return 0;
64 }
65
sandbox_clk_test_get_bulk(struct udevice * dev)66 int sandbox_clk_test_get_bulk(struct udevice *dev)
67 {
68 struct sandbox_clk_test *sbct = dev_get_priv(dev);
69
70 return clk_get_bulk(dev, &sbct->bulk);
71 }
72
sandbox_clk_test_get_rate(struct udevice * dev,int id)73 ulong sandbox_clk_test_get_rate(struct udevice *dev, int id)
74 {
75 struct sandbox_clk_test *sbct = dev_get_priv(dev);
76
77 if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
78 return -EINVAL;
79
80 return clk_get_rate(sbct->clkps[id]);
81 }
82
sandbox_clk_test_round_rate(struct udevice * dev,int id,ulong rate)83 ulong sandbox_clk_test_round_rate(struct udevice *dev, int id, ulong rate)
84 {
85 struct sandbox_clk_test *sbct = dev_get_priv(dev);
86
87 if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
88 return -EINVAL;
89
90 return clk_round_rate(sbct->clkps[id], rate);
91 }
92
sandbox_clk_test_set_rate(struct udevice * dev,int id,ulong rate)93 ulong sandbox_clk_test_set_rate(struct udevice *dev, int id, ulong rate)
94 {
95 struct sandbox_clk_test *sbct = dev_get_priv(dev);
96
97 if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
98 return -EINVAL;
99
100 return clk_set_rate(sbct->clkps[id], rate);
101 }
102
sandbox_clk_test_enable(struct udevice * dev,int id)103 int sandbox_clk_test_enable(struct udevice *dev, int id)
104 {
105 struct sandbox_clk_test *sbct = dev_get_priv(dev);
106
107 if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
108 return -EINVAL;
109
110 return clk_enable(sbct->clkps[id]);
111 }
112
sandbox_clk_test_enable_bulk(struct udevice * dev)113 int sandbox_clk_test_enable_bulk(struct udevice *dev)
114 {
115 struct sandbox_clk_test *sbct = dev_get_priv(dev);
116
117 return clk_enable_bulk(&sbct->bulk);
118 }
119
sandbox_clk_test_disable(struct udevice * dev,int id)120 int sandbox_clk_test_disable(struct udevice *dev, int id)
121 {
122 struct sandbox_clk_test *sbct = dev_get_priv(dev);
123
124 if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
125 return -EINVAL;
126
127 return clk_disable(sbct->clkps[id]);
128 }
129
sandbox_clk_test_disable_bulk(struct udevice * dev)130 int sandbox_clk_test_disable_bulk(struct udevice *dev)
131 {
132 struct sandbox_clk_test *sbct = dev_get_priv(dev);
133
134 return clk_disable_bulk(&sbct->bulk);
135 }
136
sandbox_clk_test_free(struct udevice * dev)137 int sandbox_clk_test_free(struct udevice *dev)
138 {
139 struct sandbox_clk_test *sbct = dev_get_priv(dev);
140 int i;
141
142 devm_clk_put(dev, sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM1]);
143 for (i = 0; i < SANDBOX_CLK_TEST_NON_DEVM_COUNT; i++)
144 clk_free(&sbct->clks[i]);
145
146 return 0;
147 }
148
sandbox_clk_test_release_bulk(struct udevice * dev)149 int sandbox_clk_test_release_bulk(struct udevice *dev)
150 {
151 struct sandbox_clk_test *sbct = dev_get_priv(dev);
152
153 return clk_release_bulk(&sbct->bulk);
154 }
155
sandbox_clk_test_valid(struct udevice * dev)156 int sandbox_clk_test_valid(struct udevice *dev)
157 {
158 struct sandbox_clk_test *sbct = dev_get_priv(dev);
159 int i;
160
161 for (i = 0; i < SANDBOX_CLK_TEST_ID_COUNT; i++) {
162 if (!clk_valid(sbct->clkps[i]))
163 if (i != SANDBOX_CLK_TEST_ID_DEVM_NULL)
164 return -EINVAL;
165 }
166
167 return 0;
168 }
169
sandbox_clk_test_probe(struct udevice * dev)170 static int sandbox_clk_test_probe(struct udevice *dev)
171 {
172 struct sandbox_clk_test *sbct = dev_get_priv(dev);
173 int i;
174
175 for (i = 0; i < SANDBOX_CLK_TEST_ID_DEVM1; i++)
176 sbct->clkps[i] = &sbct->clks[i];
177 for (i = SANDBOX_CLK_TEST_ID_DEVM1; i < SANDBOX_CLK_TEST_ID_COUNT; i++)
178 sbct->clkps[i] = NULL;
179
180 return 0;
181 }
182
183 static const struct udevice_id sandbox_clk_test_ids[] = {
184 { .compatible = "sandbox,clk-test" },
185 { }
186 };
187
188 U_BOOT_DRIVER(sandbox_clk_test) = {
189 .name = "sandbox_clk_test",
190 .id = UCLASS_MISC,
191 .of_match = sandbox_clk_test_ids,
192 .probe = sandbox_clk_test_probe,
193 .priv_auto = sizeof(struct sandbox_clk_test),
194 };
195