1 // SPDX-License-Identifier: GPL-2.0
5 * Dong Aisheng <aisheng.dong@nxp.com>
9 #include <linux/clk-provider.h>
10 #include <linux/device.h>
11 #include <linux/export.h>
13 #include <linux/slab.h>
15 static int __must_check of_clk_bulk_get(struct device_node *np, int num_clks,
16 struct clk_bulk_data *clks)
21 for (i = 0; i < num_clks; i++)
24 for (i = 0; i < num_clks; i++) {
25 clks[i].clk = of_clk_get(np, i);
26 if (IS_ERR(clks[i].clk)) {
27 ret = PTR_ERR(clks[i].clk);
28 pr_err("%pOF: Failed to get clk index: %d ret: %d\n",
38 clk_bulk_put(i, clks);
43 static int __must_check of_clk_bulk_get_all(struct device_node *np,
44 struct clk_bulk_data **clks)
46 struct clk_bulk_data *clk_bulk;
50 num_clks = of_clk_get_parent_count(np);
54 clk_bulk = kmalloc_array(num_clks, sizeof(*clk_bulk), GFP_KERNEL);
58 ret = of_clk_bulk_get(np, num_clks, clk_bulk);
69 void clk_bulk_put(int num_clks, struct clk_bulk_data *clks)
71 while (--num_clks >= 0) {
72 clk_put(clks[num_clks].clk);
73 clks[num_clks].clk = NULL;
76 EXPORT_SYMBOL_GPL(clk_bulk_put);
78 static int __clk_bulk_get(struct device *dev, int num_clks,
79 struct clk_bulk_data *clks, bool optional)
84 for (i = 0; i < num_clks; i++)
87 for (i = 0; i < num_clks; i++) {
88 clks[i].clk = clk_get(dev, clks[i].id);
89 if (IS_ERR(clks[i].clk)) {
90 ret = PTR_ERR(clks[i].clk);
93 if (ret == -ENOENT && optional)
96 if (ret != -EPROBE_DEFER)
97 dev_err(dev, "Failed to get clk '%s': %d\n",
106 clk_bulk_put(i, clks);
111 int __must_check clk_bulk_get(struct device *dev, int num_clks,
112 struct clk_bulk_data *clks)
114 return __clk_bulk_get(dev, num_clks, clks, false);
116 EXPORT_SYMBOL(clk_bulk_get);
118 int __must_check clk_bulk_get_optional(struct device *dev, int num_clks,
119 struct clk_bulk_data *clks)
121 return __clk_bulk_get(dev, num_clks, clks, true);
123 EXPORT_SYMBOL_GPL(clk_bulk_get_optional);
125 void clk_bulk_put_all(int num_clks, struct clk_bulk_data *clks)
127 if (IS_ERR_OR_NULL(clks))
130 clk_bulk_put(num_clks, clks);
134 EXPORT_SYMBOL(clk_bulk_put_all);
136 int __must_check clk_bulk_get_all(struct device *dev,
137 struct clk_bulk_data **clks)
139 struct device_node *np = dev_of_node(dev);
144 return of_clk_bulk_get_all(np, clks);
146 EXPORT_SYMBOL(clk_bulk_get_all);
148 #ifdef CONFIG_HAVE_CLK_PREPARE
151 * clk_bulk_unprepare - undo preparation of a set of clock sources
152 * @num_clks: the number of clk_bulk_data
153 * @clks: the clk_bulk_data table being unprepared
155 * clk_bulk_unprepare may sleep, which differentiates it from clk_bulk_disable.
156 * Returns 0 on success, -EERROR otherwise.
158 void clk_bulk_unprepare(int num_clks, const struct clk_bulk_data *clks)
160 while (--num_clks >= 0)
161 clk_unprepare(clks[num_clks].clk);
163 EXPORT_SYMBOL_GPL(clk_bulk_unprepare);
166 * clk_bulk_prepare - prepare a set of clocks
167 * @num_clks: the number of clk_bulk_data
168 * @clks: the clk_bulk_data table being prepared
170 * clk_bulk_prepare may sleep, which differentiates it from clk_bulk_enable.
171 * Returns 0 on success, -EERROR otherwise.
173 int __must_check clk_bulk_prepare(int num_clks,
174 const struct clk_bulk_data *clks)
179 for (i = 0; i < num_clks; i++) {
180 ret = clk_prepare(clks[i].clk);
182 pr_err("Failed to prepare clk '%s': %d\n",
191 clk_bulk_unprepare(i, clks);
195 EXPORT_SYMBOL_GPL(clk_bulk_prepare);
197 #endif /* CONFIG_HAVE_CLK_PREPARE */
200 * clk_bulk_disable - gate a set of clocks
201 * @num_clks: the number of clk_bulk_data
202 * @clks: the clk_bulk_data table being gated
204 * clk_bulk_disable must not sleep, which differentiates it from
205 * clk_bulk_unprepare. clk_bulk_disable must be called before
206 * clk_bulk_unprepare.
208 void clk_bulk_disable(int num_clks, const struct clk_bulk_data *clks)
211 while (--num_clks >= 0)
212 clk_disable(clks[num_clks].clk);
214 EXPORT_SYMBOL_GPL(clk_bulk_disable);
217 * clk_bulk_enable - ungate a set of clocks
218 * @num_clks: the number of clk_bulk_data
219 * @clks: the clk_bulk_data table being ungated
221 * clk_bulk_enable must not sleep
222 * Returns 0 on success, -EERROR otherwise.
224 int __must_check clk_bulk_enable(int num_clks, const struct clk_bulk_data *clks)
229 for (i = 0; i < num_clks; i++) {
230 ret = clk_enable(clks[i].clk);
232 pr_err("Failed to enable clk '%s': %d\n",
241 clk_bulk_disable(i, clks);
245 EXPORT_SYMBOL_GPL(clk_bulk_enable);