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1/*
2 * Copyright 2011-2012 Calxeda, Inc.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16
17#include <linux/kernel.h>
18#include <linux/slab.h>
19#include <linux/err.h>
20#include <linux/clk-provider.h>
21#include <linux/io.h>
22#include <linux/of.h>
23#include <linux/of_address.h>
24
25#define HB_PLL_LOCK_500 0x20000000
26#define HB_PLL_LOCK 0x10000000
27#define HB_PLL_DIVF_SHIFT 20
28#define HB_PLL_DIVF_MASK 0x0ff00000
29#define HB_PLL_DIVQ_SHIFT 16
30#define HB_PLL_DIVQ_MASK 0x00070000
31#define HB_PLL_DIVR_SHIFT 8
32#define HB_PLL_DIVR_MASK 0x00001f00
33#define HB_PLL_RANGE_SHIFT 4
34#define HB_PLL_RANGE_MASK 0x00000070
35#define HB_PLL_BYPASS 0x00000008
36#define HB_PLL_RESET 0x00000004
37#define HB_PLL_EXT_BYPASS 0x00000002
38#define HB_PLL_EXT_ENA 0x00000001
39
40#define HB_PLL_VCO_MIN_FREQ 2133000000
41#define HB_PLL_MAX_FREQ HB_PLL_VCO_MIN_FREQ
42#define HB_PLL_MIN_FREQ (HB_PLL_VCO_MIN_FREQ / 64)
43
44#define HB_A9_BCLK_DIV_MASK 0x00000006
45#define HB_A9_BCLK_DIV_SHIFT 1
46#define HB_A9_PCLK_DIV 0x00000001
47
48struct hb_clk {
49 struct clk_hw hw;
50 void __iomem *reg;
51 char *parent_name;
52};
53#define to_hb_clk(p) container_of(p, struct hb_clk, hw)
54
55static int clk_pll_prepare(struct clk_hw *hwclk)
56 {
57 struct hb_clk *hbclk = to_hb_clk(hwclk);
58 u32 reg;
59
60 reg = readl(hbclk->reg);
61 reg &= ~HB_PLL_RESET;
62 writel(reg, hbclk->reg);
63
64 while ((readl(hbclk->reg) & HB_PLL_LOCK) == 0)
65 ;
66 while ((readl(hbclk->reg) & HB_PLL_LOCK_500) == 0)
67 ;
68
69 return 0;
70}
71
72static void clk_pll_unprepare(struct clk_hw *hwclk)
73{
74 struct hb_clk *hbclk = to_hb_clk(hwclk);
75 u32 reg;
76
77 reg = readl(hbclk->reg);
78 reg |= HB_PLL_RESET;
79 writel(reg, hbclk->reg);
80}
81
82static int clk_pll_enable(struct clk_hw *hwclk)
83{
84 struct hb_clk *hbclk = to_hb_clk(hwclk);
85 u32 reg;
86
87 reg = readl(hbclk->reg);
88 reg |= HB_PLL_EXT_ENA;
89 writel(reg, hbclk->reg);
90
91 return 0;
92}
93
94static void clk_pll_disable(struct clk_hw *hwclk)
95{
96 struct hb_clk *hbclk = to_hb_clk(hwclk);
97 u32 reg;
98
99 reg = readl(hbclk->reg);
100 reg &= ~HB_PLL_EXT_ENA;
101 writel(reg, hbclk->reg);
102}
103
104static unsigned long clk_pll_recalc_rate(struct clk_hw *hwclk,
105 unsigned long parent_rate)
106{
107 struct hb_clk *hbclk = to_hb_clk(hwclk);
108 unsigned long divf, divq, vco_freq, reg;
109
110 reg = readl(hbclk->reg);
111 if (reg & HB_PLL_EXT_BYPASS)
112 return parent_rate;
113
114 divf = (reg & HB_PLL_DIVF_MASK) >> HB_PLL_DIVF_SHIFT;
115 divq = (reg & HB_PLL_DIVQ_MASK) >> HB_PLL_DIVQ_SHIFT;
116 vco_freq = parent_rate * (divf + 1);
117
118 return vco_freq / (1 << divq);
119}
120
121static void clk_pll_calc(unsigned long rate, unsigned long ref_freq,
122 u32 *pdivq, u32 *pdivf)
123{
124 u32 divq, divf;
125 unsigned long vco_freq;
126
127 if (rate < HB_PLL_MIN_FREQ)
128 rate = HB_PLL_MIN_FREQ;
129 if (rate > HB_PLL_MAX_FREQ)
130 rate = HB_PLL_MAX_FREQ;
131
132 for (divq = 1; divq <= 6; divq++) {
133 if ((rate * (1 << divq)) >= HB_PLL_VCO_MIN_FREQ)
134 break;
135 }
136
137 vco_freq = rate * (1 << divq);
138 divf = (vco_freq + (ref_freq / 2)) / ref_freq;
139 divf--;
140
141 *pdivq = divq;
142 *pdivf = divf;
143}
144
145static long clk_pll_round_rate(struct clk_hw *hwclk, unsigned long rate,
146 unsigned long *parent_rate)
147{
148 u32 divq, divf;
149 unsigned long ref_freq = *parent_rate;
150
151 clk_pll_calc(rate, ref_freq, &divq, &divf);
152
153 return (ref_freq * (divf + 1)) / (1 << divq);
154}
155
156static int clk_pll_set_rate(struct clk_hw *hwclk, unsigned long rate,
157 unsigned long parent_rate)
158{
159 struct hb_clk *hbclk = to_hb_clk(hwclk);
160 u32 divq, divf;
161 u32 reg;
162
163 clk_pll_calc(rate, parent_rate, &divq, &divf);
164
165 reg = readl(hbclk->reg);
166 if (divf != ((reg & HB_PLL_DIVF_MASK) >> HB_PLL_DIVF_SHIFT)) {
167 /* Need to re-lock PLL, so put it into bypass mode */
168 reg |= HB_PLL_EXT_BYPASS;
169 writel(reg | HB_PLL_EXT_BYPASS, hbclk->reg);
170
171 writel(reg | HB_PLL_RESET, hbclk->reg);
172 reg &= ~(HB_PLL_DIVF_MASK | HB_PLL_DIVQ_MASK);
173 reg |= (divf << HB_PLL_DIVF_SHIFT) | (divq << HB_PLL_DIVQ_SHIFT);
174 writel(reg | HB_PLL_RESET, hbclk->reg);
175 writel(reg, hbclk->reg);
176
177 while ((readl(hbclk->reg) & HB_PLL_LOCK) == 0)
178 ;
179 while ((readl(hbclk->reg) & HB_PLL_LOCK_500) == 0)
180 ;
181 reg |= HB_PLL_EXT_ENA;
182 reg &= ~HB_PLL_EXT_BYPASS;
183 } else {
184 writel(reg | HB_PLL_EXT_BYPASS, hbclk->reg);
185 reg &= ~HB_PLL_DIVQ_MASK;
186 reg |= divq << HB_PLL_DIVQ_SHIFT;
187 writel(reg | HB_PLL_EXT_BYPASS, hbclk->reg);
188 }
189 writel(reg, hbclk->reg);
190
191 return 0;
192}
193
194static const struct clk_ops clk_pll_ops = {
195 .prepare = clk_pll_prepare,
196 .unprepare = clk_pll_unprepare,
197 .enable = clk_pll_enable,
198 .disable = clk_pll_disable,
199 .recalc_rate = clk_pll_recalc_rate,
200 .round_rate = clk_pll_round_rate,
201 .set_rate = clk_pll_set_rate,
202};
203
204static unsigned long clk_cpu_periphclk_recalc_rate(struct clk_hw *hwclk,
205 unsigned long parent_rate)
206{
207 struct hb_clk *hbclk = to_hb_clk(hwclk);
208 u32 div = (readl(hbclk->reg) & HB_A9_PCLK_DIV) ? 8 : 4;
209 return parent_rate / div;
210}
211
212static const struct clk_ops a9periphclk_ops = {
213 .recalc_rate = clk_cpu_periphclk_recalc_rate,
214};
215
216static unsigned long clk_cpu_a9bclk_recalc_rate(struct clk_hw *hwclk,
217 unsigned long parent_rate)
218{
219 struct hb_clk *hbclk = to_hb_clk(hwclk);
220 u32 div = (readl(hbclk->reg) & HB_A9_BCLK_DIV_MASK) >> HB_A9_BCLK_DIV_SHIFT;
221
222 return parent_rate / (div + 2);
223}
224
225static const struct clk_ops a9bclk_ops = {
226 .recalc_rate = clk_cpu_a9bclk_recalc_rate,
227};
228
229static unsigned long clk_periclk_recalc_rate(struct clk_hw *hwclk,
230 unsigned long parent_rate)
231{
232 struct hb_clk *hbclk = to_hb_clk(hwclk);
233 u32 div;
234
235 div = readl(hbclk->reg) & 0x1f;
236 div++;
237 div *= 2;
238
239 return parent_rate / div;
240}
241
242static long clk_periclk_round_rate(struct clk_hw *hwclk, unsigned long rate,
243 unsigned long *parent_rate)
244{
245 u32 div;
246
247 div = *parent_rate / rate;
248 div++;
249 div &= ~0x1;
250
251 return *parent_rate / div;
252}
253
254static int clk_periclk_set_rate(struct clk_hw *hwclk, unsigned long rate,
255 unsigned long parent_rate)
256{
257 struct hb_clk *hbclk = to_hb_clk(hwclk);
258 u32 div;
259
260 div = parent_rate / rate;
261 if (div & 0x1)
262 return -EINVAL;
263
264 writel(div >> 1, hbclk->reg);
265 return 0;
266}
267
268static const struct clk_ops periclk_ops = {
269 .recalc_rate = clk_periclk_recalc_rate,
270 .round_rate = clk_periclk_round_rate,
271 .set_rate = clk_periclk_set_rate,
272};
273
274static __init struct clk *hb_clk_init(struct device_node *node, const struct clk_ops *ops)
275{
276 u32 reg;
277 struct clk *clk;
278 struct hb_clk *hb_clk;
279 const char *clk_name = node->name;
280 const char *parent_name;
281 struct clk_init_data init;
282 struct device_node *srnp;
283 int rc;
284
285 rc = of_property_read_u32(node, "reg", ®);
286 if (WARN_ON(rc))
287 return NULL;
288
289 hb_clk = kzalloc(sizeof(*hb_clk), GFP_KERNEL);
290 if (WARN_ON(!hb_clk))
291 return NULL;
292
293 /* Map system registers */
294 srnp = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs");
295 hb_clk->reg = of_iomap(srnp, 0);
296 BUG_ON(!hb_clk->reg);
297 hb_clk->reg += reg;
298
299 of_property_read_string(node, "clock-output-names", &clk_name);
300
301 init.name = clk_name;
302 init.ops = ops;
303 init.flags = 0;
304 parent_name = of_clk_get_parent_name(node, 0);
305 init.parent_names = &parent_name;
306 init.num_parents = 1;
307
308 hb_clk->hw.init = &init;
309
310 clk = clk_register(NULL, &hb_clk->hw);
311 if (WARN_ON(IS_ERR(clk))) {
312 kfree(hb_clk);
313 return NULL;
314 }
315 rc = of_clk_add_provider(node, of_clk_src_simple_get, clk);
316 return clk;
317}
318
319static void __init hb_pll_init(struct device_node *node)
320{
321 hb_clk_init(node, &clk_pll_ops);
322}
323CLK_OF_DECLARE(hb_pll, "calxeda,hb-pll-clock", hb_pll_init);
324
325static void __init hb_a9periph_init(struct device_node *node)
326{
327 hb_clk_init(node, &a9periphclk_ops);
328}
329CLK_OF_DECLARE(hb_a9periph, "calxeda,hb-a9periph-clock", hb_a9periph_init);
330
331static void __init hb_a9bus_init(struct device_node *node)
332{
333 struct clk *clk = hb_clk_init(node, &a9bclk_ops);
334 clk_prepare_enable(clk);
335}
336CLK_OF_DECLARE(hb_a9bus, "calxeda,hb-a9bus-clock", hb_a9bus_init);
337
338static void __init hb_emmc_init(struct device_node *node)
339{
340 hb_clk_init(node, &periclk_ops);
341}
342CLK_OF_DECLARE(hb_emmc, "calxeda,hb-emmc-clock", hb_emmc_init);
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright 2011-2012 Calxeda, Inc.
4 */
5
6#include <linux/kernel.h>
7#include <linux/slab.h>
8#include <linux/err.h>
9#include <linux/clk-provider.h>
10#include <linux/io.h>
11#include <linux/of.h>
12#include <linux/of_address.h>
13
14#define HB_PLL_LOCK_500 0x20000000
15#define HB_PLL_LOCK 0x10000000
16#define HB_PLL_DIVF_SHIFT 20
17#define HB_PLL_DIVF_MASK 0x0ff00000
18#define HB_PLL_DIVQ_SHIFT 16
19#define HB_PLL_DIVQ_MASK 0x00070000
20#define HB_PLL_DIVR_SHIFT 8
21#define HB_PLL_DIVR_MASK 0x00001f00
22#define HB_PLL_RANGE_SHIFT 4
23#define HB_PLL_RANGE_MASK 0x00000070
24#define HB_PLL_BYPASS 0x00000008
25#define HB_PLL_RESET 0x00000004
26#define HB_PLL_EXT_BYPASS 0x00000002
27#define HB_PLL_EXT_ENA 0x00000001
28
29#define HB_PLL_VCO_MIN_FREQ 2133000000
30#define HB_PLL_MAX_FREQ HB_PLL_VCO_MIN_FREQ
31#define HB_PLL_MIN_FREQ (HB_PLL_VCO_MIN_FREQ / 64)
32
33#define HB_A9_BCLK_DIV_MASK 0x00000006
34#define HB_A9_BCLK_DIV_SHIFT 1
35#define HB_A9_PCLK_DIV 0x00000001
36
37struct hb_clk {
38 struct clk_hw hw;
39 void __iomem *reg;
40};
41#define to_hb_clk(p) container_of(p, struct hb_clk, hw)
42
43static int clk_pll_prepare(struct clk_hw *hwclk)
44 {
45 struct hb_clk *hbclk = to_hb_clk(hwclk);
46 u32 reg;
47
48 reg = readl(hbclk->reg);
49 reg &= ~HB_PLL_RESET;
50 writel(reg, hbclk->reg);
51
52 while ((readl(hbclk->reg) & HB_PLL_LOCK) == 0)
53 ;
54 while ((readl(hbclk->reg) & HB_PLL_LOCK_500) == 0)
55 ;
56
57 return 0;
58}
59
60static void clk_pll_unprepare(struct clk_hw *hwclk)
61{
62 struct hb_clk *hbclk = to_hb_clk(hwclk);
63 u32 reg;
64
65 reg = readl(hbclk->reg);
66 reg |= HB_PLL_RESET;
67 writel(reg, hbclk->reg);
68}
69
70static int clk_pll_enable(struct clk_hw *hwclk)
71{
72 struct hb_clk *hbclk = to_hb_clk(hwclk);
73 u32 reg;
74
75 reg = readl(hbclk->reg);
76 reg |= HB_PLL_EXT_ENA;
77 writel(reg, hbclk->reg);
78
79 return 0;
80}
81
82static void clk_pll_disable(struct clk_hw *hwclk)
83{
84 struct hb_clk *hbclk = to_hb_clk(hwclk);
85 u32 reg;
86
87 reg = readl(hbclk->reg);
88 reg &= ~HB_PLL_EXT_ENA;
89 writel(reg, hbclk->reg);
90}
91
92static unsigned long clk_pll_recalc_rate(struct clk_hw *hwclk,
93 unsigned long parent_rate)
94{
95 struct hb_clk *hbclk = to_hb_clk(hwclk);
96 unsigned long divf, divq, vco_freq, reg;
97
98 reg = readl(hbclk->reg);
99 if (reg & HB_PLL_EXT_BYPASS)
100 return parent_rate;
101
102 divf = (reg & HB_PLL_DIVF_MASK) >> HB_PLL_DIVF_SHIFT;
103 divq = (reg & HB_PLL_DIVQ_MASK) >> HB_PLL_DIVQ_SHIFT;
104 vco_freq = parent_rate * (divf + 1);
105
106 return vco_freq / (1 << divq);
107}
108
109static void clk_pll_calc(unsigned long rate, unsigned long ref_freq,
110 u32 *pdivq, u32 *pdivf)
111{
112 u32 divq, divf;
113 unsigned long vco_freq;
114
115 if (rate < HB_PLL_MIN_FREQ)
116 rate = HB_PLL_MIN_FREQ;
117 if (rate > HB_PLL_MAX_FREQ)
118 rate = HB_PLL_MAX_FREQ;
119
120 for (divq = 1; divq <= 6; divq++) {
121 if ((rate * (1 << divq)) >= HB_PLL_VCO_MIN_FREQ)
122 break;
123 }
124
125 vco_freq = rate * (1 << divq);
126 divf = (vco_freq + (ref_freq / 2)) / ref_freq;
127 divf--;
128
129 *pdivq = divq;
130 *pdivf = divf;
131}
132
133static long clk_pll_round_rate(struct clk_hw *hwclk, unsigned long rate,
134 unsigned long *parent_rate)
135{
136 u32 divq, divf;
137 unsigned long ref_freq = *parent_rate;
138
139 clk_pll_calc(rate, ref_freq, &divq, &divf);
140
141 return (ref_freq * (divf + 1)) / (1 << divq);
142}
143
144static int clk_pll_set_rate(struct clk_hw *hwclk, unsigned long rate,
145 unsigned long parent_rate)
146{
147 struct hb_clk *hbclk = to_hb_clk(hwclk);
148 u32 divq, divf;
149 u32 reg;
150
151 clk_pll_calc(rate, parent_rate, &divq, &divf);
152
153 reg = readl(hbclk->reg);
154 if (divf != ((reg & HB_PLL_DIVF_MASK) >> HB_PLL_DIVF_SHIFT)) {
155 /* Need to re-lock PLL, so put it into bypass mode */
156 reg |= HB_PLL_EXT_BYPASS;
157 writel(reg | HB_PLL_EXT_BYPASS, hbclk->reg);
158
159 writel(reg | HB_PLL_RESET, hbclk->reg);
160 reg &= ~(HB_PLL_DIVF_MASK | HB_PLL_DIVQ_MASK);
161 reg |= (divf << HB_PLL_DIVF_SHIFT) | (divq << HB_PLL_DIVQ_SHIFT);
162 writel(reg | HB_PLL_RESET, hbclk->reg);
163 writel(reg, hbclk->reg);
164
165 while ((readl(hbclk->reg) & HB_PLL_LOCK) == 0)
166 ;
167 while ((readl(hbclk->reg) & HB_PLL_LOCK_500) == 0)
168 ;
169 reg |= HB_PLL_EXT_ENA;
170 reg &= ~HB_PLL_EXT_BYPASS;
171 } else {
172 writel(reg | HB_PLL_EXT_BYPASS, hbclk->reg);
173 reg &= ~HB_PLL_DIVQ_MASK;
174 reg |= divq << HB_PLL_DIVQ_SHIFT;
175 writel(reg | HB_PLL_EXT_BYPASS, hbclk->reg);
176 }
177 writel(reg, hbclk->reg);
178
179 return 0;
180}
181
182static const struct clk_ops clk_pll_ops = {
183 .prepare = clk_pll_prepare,
184 .unprepare = clk_pll_unprepare,
185 .enable = clk_pll_enable,
186 .disable = clk_pll_disable,
187 .recalc_rate = clk_pll_recalc_rate,
188 .round_rate = clk_pll_round_rate,
189 .set_rate = clk_pll_set_rate,
190};
191
192static unsigned long clk_cpu_periphclk_recalc_rate(struct clk_hw *hwclk,
193 unsigned long parent_rate)
194{
195 struct hb_clk *hbclk = to_hb_clk(hwclk);
196 u32 div = (readl(hbclk->reg) & HB_A9_PCLK_DIV) ? 8 : 4;
197 return parent_rate / div;
198}
199
200static const struct clk_ops a9periphclk_ops = {
201 .recalc_rate = clk_cpu_periphclk_recalc_rate,
202};
203
204static unsigned long clk_cpu_a9bclk_recalc_rate(struct clk_hw *hwclk,
205 unsigned long parent_rate)
206{
207 struct hb_clk *hbclk = to_hb_clk(hwclk);
208 u32 div = (readl(hbclk->reg) & HB_A9_BCLK_DIV_MASK) >> HB_A9_BCLK_DIV_SHIFT;
209
210 return parent_rate / (div + 2);
211}
212
213static const struct clk_ops a9bclk_ops = {
214 .recalc_rate = clk_cpu_a9bclk_recalc_rate,
215};
216
217static unsigned long clk_periclk_recalc_rate(struct clk_hw *hwclk,
218 unsigned long parent_rate)
219{
220 struct hb_clk *hbclk = to_hb_clk(hwclk);
221 u32 div;
222
223 div = readl(hbclk->reg) & 0x1f;
224 div++;
225 div *= 2;
226
227 return parent_rate / div;
228}
229
230static long clk_periclk_round_rate(struct clk_hw *hwclk, unsigned long rate,
231 unsigned long *parent_rate)
232{
233 u32 div;
234
235 div = *parent_rate / rate;
236 div++;
237 div &= ~0x1;
238
239 return *parent_rate / div;
240}
241
242static int clk_periclk_set_rate(struct clk_hw *hwclk, unsigned long rate,
243 unsigned long parent_rate)
244{
245 struct hb_clk *hbclk = to_hb_clk(hwclk);
246 u32 div;
247
248 div = parent_rate / rate;
249 if (div & 0x1)
250 return -EINVAL;
251
252 writel(div >> 1, hbclk->reg);
253 return 0;
254}
255
256static const struct clk_ops periclk_ops = {
257 .recalc_rate = clk_periclk_recalc_rate,
258 .round_rate = clk_periclk_round_rate,
259 .set_rate = clk_periclk_set_rate,
260};
261
262static void __init hb_clk_init(struct device_node *node, const struct clk_ops *ops, unsigned long clkflags)
263{
264 u32 reg;
265 struct hb_clk *hb_clk;
266 const char *clk_name = node->name;
267 const char *parent_name;
268 struct clk_init_data init;
269 struct device_node *srnp;
270 int rc;
271
272 rc = of_property_read_u32(node, "reg", ®);
273 if (WARN_ON(rc))
274 return;
275
276 hb_clk = kzalloc(sizeof(*hb_clk), GFP_KERNEL);
277 if (WARN_ON(!hb_clk))
278 return;
279
280 /* Map system registers */
281 srnp = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs");
282 hb_clk->reg = of_iomap(srnp, 0);
283 of_node_put(srnp);
284 BUG_ON(!hb_clk->reg);
285 hb_clk->reg += reg;
286
287 of_property_read_string(node, "clock-output-names", &clk_name);
288
289 init.name = clk_name;
290 init.ops = ops;
291 init.flags = clkflags;
292 parent_name = of_clk_get_parent_name(node, 0);
293 init.parent_names = &parent_name;
294 init.num_parents = 1;
295
296 hb_clk->hw.init = &init;
297
298 rc = clk_hw_register(NULL, &hb_clk->hw);
299 if (WARN_ON(rc)) {
300 kfree(hb_clk);
301 return;
302 }
303 of_clk_add_hw_provider(node, of_clk_hw_simple_get, &hb_clk->hw);
304}
305
306static void __init hb_pll_init(struct device_node *node)
307{
308 hb_clk_init(node, &clk_pll_ops, 0);
309}
310CLK_OF_DECLARE(hb_pll, "calxeda,hb-pll-clock", hb_pll_init);
311
312static void __init hb_a9periph_init(struct device_node *node)
313{
314 hb_clk_init(node, &a9periphclk_ops, 0);
315}
316CLK_OF_DECLARE(hb_a9periph, "calxeda,hb-a9periph-clock", hb_a9periph_init);
317
318static void __init hb_a9bus_init(struct device_node *node)
319{
320 hb_clk_init(node, &a9bclk_ops, CLK_IS_CRITICAL);
321}
322CLK_OF_DECLARE(hb_a9bus, "calxeda,hb-a9bus-clock", hb_a9bus_init);
323
324static void __init hb_emmc_init(struct device_node *node)
325{
326 hb_clk_init(node, &periclk_ops, 0);
327}
328CLK_OF_DECLARE(hb_emmc, "calxeda,hb-emmc-clock", hb_emmc_init);