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authorMagnus Damm <damm@opensource.se>2010-05-11 09:29:34 -0400
committerPaul Mundt <lethal@linux-sh.org>2010-05-13 04:39:22 -0400
commitfa676ca3944e4459ea3d133eabc923c8ab5d2576 (patch)
tree2541fa810ec2808487aa559abb1e550f5023acfd /arch/sh
parent8b5ee113e1b97097e992a0301d0cac2530b31fc2 (diff)
sh: move sh clock-cpg.c contents to drivers/sh/clk-cpg.c
Move the CPG helpers to drivers/sh/clk-cpg.c V2. This to allow SH-Mobile ARM to share the code with SH. All functions except the legacy CPG stuff is moved. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh')
-rw-r--r--arch/sh/kernel/cpu/Makefile2
-rw-r--r--arch/sh/kernel/cpu/clock-cpg.c295
2 files changed, 1 insertions, 296 deletions
diff --git a/arch/sh/kernel/cpu/Makefile b/arch/sh/kernel/cpu/Makefile
index 0e48bc61c27..4edcb60a135 100644
--- a/arch/sh/kernel/cpu/Makefile
+++ b/arch/sh/kernel/cpu/Makefile
@@ -16,7 +16,7 @@ obj-$(CONFIG_ARCH_SHMOBILE) += shmobile/
16# Common interfaces. 16# Common interfaces.
17 17
18obj-$(CONFIG_SH_ADC) += adc.o 18obj-$(CONFIG_SH_ADC) += adc.o
19obj-$(CONFIG_SH_CLK_CPG) += clock-cpg.o 19obj-$(CONFIG_SH_CLK_CPG_LEGACY) += clock-cpg.o
20obj-$(CONFIG_SH_FPU) += fpu.o 20obj-$(CONFIG_SH_FPU) += fpu.o
21obj-$(CONFIG_SH_FPU_EMU) += fpu.o 21obj-$(CONFIG_SH_FPU_EMU) += fpu.o
22 22
diff --git a/arch/sh/kernel/cpu/clock-cpg.c b/arch/sh/kernel/cpu/clock-cpg.c
index 69c6472cdf5..e2f63d68da5 100644
--- a/arch/sh/kernel/cpu/clock-cpg.c
+++ b/arch/sh/kernel/cpu/clock-cpg.c
@@ -5,300 +5,6 @@
5#include <asm/clkdev.h> 5#include <asm/clkdev.h>
6#include <asm/clock.h> 6#include <asm/clock.h>
7 7
8static int sh_clk_mstp32_enable(struct clk *clk)
9{
10 __raw_writel(__raw_readl(clk->enable_reg) & ~(1 << clk->enable_bit),
11 clk->enable_reg);
12 return 0;
13}
14
15static void sh_clk_mstp32_disable(struct clk *clk)
16{
17 __raw_writel(__raw_readl(clk->enable_reg) | (1 << clk->enable_bit),
18 clk->enable_reg);
19}
20
21static struct clk_ops sh_clk_mstp32_clk_ops = {
22 .enable = sh_clk_mstp32_enable,
23 .disable = sh_clk_mstp32_disable,
24 .recalc = followparent_recalc,
25};
26
27int __init sh_clk_mstp32_register(struct clk *clks, int nr)
28{
29 struct clk *clkp;
30 int ret = 0;
31 int k;
32
33 for (k = 0; !ret && (k < nr); k++) {
34 clkp = clks + k;
35 clkp->ops = &sh_clk_mstp32_clk_ops;
36 ret |= clk_register(clkp);
37 }
38
39 return ret;
40}
41
42static long sh_clk_div_round_rate(struct clk *clk, unsigned long rate)
43{
44 return clk_rate_table_round(clk, clk->freq_table, rate);
45}
46
47static int sh_clk_div6_divisors[64] = {
48 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
49 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
50 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
51 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64
52};
53
54static struct clk_div_mult_table sh_clk_div6_table = {
55 .divisors = sh_clk_div6_divisors,
56 .nr_divisors = ARRAY_SIZE(sh_clk_div6_divisors),
57};
58
59static unsigned long sh_clk_div6_recalc(struct clk *clk)
60{
61 struct clk_div_mult_table *table = &sh_clk_div6_table;
62 unsigned int idx;
63
64 clk_rate_table_build(clk, clk->freq_table, table->nr_divisors,
65 table, NULL);
66
67 idx = __raw_readl(clk->enable_reg) & 0x003f;
68
69 return clk->freq_table[idx].frequency;
70}
71
72static int sh_clk_div6_set_rate(struct clk *clk,
73 unsigned long rate, int algo_id)
74{
75 unsigned long value;
76 int idx;
77
78 idx = clk_rate_table_find(clk, clk->freq_table, rate);
79 if (idx < 0)
80 return idx;
81
82 value = __raw_readl(clk->enable_reg);
83 value &= ~0x3f;
84 value |= idx;
85 __raw_writel(value, clk->enable_reg);
86 return 0;
87}
88
89static int sh_clk_div6_enable(struct clk *clk)
90{
91 unsigned long value;
92 int ret;
93
94 ret = sh_clk_div6_set_rate(clk, clk->rate, 0);
95 if (ret == 0) {
96 value = __raw_readl(clk->enable_reg);
97 value &= ~0x100; /* clear stop bit to enable clock */
98 __raw_writel(value, clk->enable_reg);
99 }
100 return ret;
101}
102
103static void sh_clk_div6_disable(struct clk *clk)
104{
105 unsigned long value;
106
107 value = __raw_readl(clk->enable_reg);
108 value |= 0x100; /* stop clock */
109 value |= 0x3f; /* VDIV bits must be non-zero, overwrite divider */
110 __raw_writel(value, clk->enable_reg);
111}
112
113static struct clk_ops sh_clk_div6_clk_ops = {
114 .recalc = sh_clk_div6_recalc,
115 .round_rate = sh_clk_div_round_rate,
116 .set_rate = sh_clk_div6_set_rate,
117 .enable = sh_clk_div6_enable,
118 .disable = sh_clk_div6_disable,
119};
120
121int __init sh_clk_div6_register(struct clk *clks, int nr)
122{
123 struct clk *clkp;
124 void *freq_table;
125 int nr_divs = sh_clk_div6_table.nr_divisors;
126 int freq_table_size = sizeof(struct cpufreq_frequency_table);
127 int ret = 0;
128 int k;
129
130 freq_table_size *= (nr_divs + 1);
131 freq_table = kzalloc(freq_table_size * nr, GFP_KERNEL);
132 if (!freq_table) {
133 pr_err("sh_clk_div6_register: unable to alloc memory\n");
134 return -ENOMEM;
135 }
136
137 for (k = 0; !ret && (k < nr); k++) {
138 clkp = clks + k;
139
140 clkp->ops = &sh_clk_div6_clk_ops;
141 clkp->id = -1;
142 clkp->freq_table = freq_table + (k * freq_table_size);
143 clkp->freq_table[nr_divs].frequency = CPUFREQ_TABLE_END;
144
145 ret = clk_register(clkp);
146 }
147
148 return ret;
149}
150
151static unsigned long sh_clk_div4_recalc(struct clk *clk)
152{
153 struct clk_div4_table *d4t = clk->priv;
154 struct clk_div_mult_table *table = d4t->div_mult_table;
155 unsigned int idx;
156
157 clk_rate_table_build(clk, clk->freq_table, table->nr_divisors,
158 table, &clk->arch_flags);
159
160 idx = (__raw_readl(clk->enable_reg) >> clk->enable_bit) & 0x000f;
161
162 return clk->freq_table[idx].frequency;
163}
164
165static int sh_clk_div4_set_parent(struct clk *clk, struct clk *parent)
166{
167 struct clk_div4_table *d4t = clk->priv;
168 struct clk_div_mult_table *table = d4t->div_mult_table;
169 u32 value;
170 int ret;
171
172 /* we really need a better way to determine parent index, but for
173 * now assume internal parent comes with CLK_ENABLE_ON_INIT set,
174 * no CLK_ENABLE_ON_INIT means external clock...
175 */
176
177 if (parent->flags & CLK_ENABLE_ON_INIT)
178 value = __raw_readl(clk->enable_reg) & ~(1 << 7);
179 else
180 value = __raw_readl(clk->enable_reg) | (1 << 7);
181
182 ret = clk_reparent(clk, parent);
183 if (ret < 0)
184 return ret;
185
186 __raw_writel(value, clk->enable_reg);
187
188 /* Rebiuld the frequency table */
189 clk_rate_table_build(clk, clk->freq_table, table->nr_divisors,
190 table, &clk->arch_flags);
191
192 return 0;
193}
194
195static int sh_clk_div4_set_rate(struct clk *clk, unsigned long rate, int algo_id)
196{
197 struct clk_div4_table *d4t = clk->priv;
198 unsigned long value;
199 int idx = clk_rate_table_find(clk, clk->freq_table, rate);
200 if (idx < 0)
201 return idx;
202
203 value = __raw_readl(clk->enable_reg);
204 value &= ~(0xf << clk->enable_bit);
205 value |= (idx << clk->enable_bit);
206 __raw_writel(value, clk->enable_reg);
207
208 if (d4t->kick)
209 d4t->kick(clk);
210
211 return 0;
212}
213
214static int sh_clk_div4_enable(struct clk *clk)
215{
216 __raw_writel(__raw_readl(clk->enable_reg) & ~(1 << 8), clk->enable_reg);
217 return 0;
218}
219
220static void sh_clk_div4_disable(struct clk *clk)
221{
222 __raw_writel(__raw_readl(clk->enable_reg) | (1 << 8), clk->enable_reg);
223}
224
225static struct clk_ops sh_clk_div4_clk_ops = {
226 .recalc = sh_clk_div4_recalc,
227 .set_rate = sh_clk_div4_set_rate,
228 .round_rate = sh_clk_div_round_rate,
229};
230
231static struct clk_ops sh_clk_div4_enable_clk_ops = {
232 .recalc = sh_clk_div4_recalc,
233 .set_rate = sh_clk_div4_set_rate,
234 .round_rate = sh_clk_div_round_rate,
235 .enable = sh_clk_div4_enable,
236 .disable = sh_clk_div4_disable,
237};
238
239static struct clk_ops sh_clk_div4_reparent_clk_ops = {
240 .recalc = sh_clk_div4_recalc,
241 .set_rate = sh_clk_div4_set_rate,
242 .round_rate = sh_clk_div_round_rate,
243 .enable = sh_clk_div4_enable,
244 .disable = sh_clk_div4_disable,
245 .set_parent = sh_clk_div4_set_parent,
246};
247
248static int __init sh_clk_div4_register_ops(struct clk *clks, int nr,
249 struct clk_div4_table *table, struct clk_ops *ops)
250{
251 struct clk *clkp;
252 void *freq_table;
253 int nr_divs = table->div_mult_table->nr_divisors;
254 int freq_table_size = sizeof(struct cpufreq_frequency_table);
255 int ret = 0;
256 int k;
257
258 freq_table_size *= (nr_divs + 1);
259 freq_table = kzalloc(freq_table_size * nr, GFP_KERNEL);
260 if (!freq_table) {
261 pr_err("sh_clk_div4_register: unable to alloc memory\n");
262 return -ENOMEM;
263 }
264
265 for (k = 0; !ret && (k < nr); k++) {
266 clkp = clks + k;
267
268 clkp->ops = ops;
269 clkp->id = -1;
270 clkp->priv = table;
271
272 clkp->freq_table = freq_table + (k * freq_table_size);
273 clkp->freq_table[nr_divs].frequency = CPUFREQ_TABLE_END;
274
275 ret = clk_register(clkp);
276 }
277
278 return ret;
279}
280
281int __init sh_clk_div4_register(struct clk *clks, int nr,
282 struct clk_div4_table *table)
283{
284 return sh_clk_div4_register_ops(clks, nr, table, &sh_clk_div4_clk_ops);
285}
286
287int __init sh_clk_div4_enable_register(struct clk *clks, int nr,
288 struct clk_div4_table *table)
289{
290 return sh_clk_div4_register_ops(clks, nr, table,
291 &sh_clk_div4_enable_clk_ops);
292}
293
294int __init sh_clk_div4_reparent_register(struct clk *clks, int nr,
295 struct clk_div4_table *table)
296{
297 return sh_clk_div4_register_ops(clks, nr, table,
298 &sh_clk_div4_reparent_clk_ops);
299}
300
301#ifdef CONFIG_SH_CLK_CPG_LEGACY
302static struct clk master_clk = { 8static struct clk master_clk = {
303 .flags = CLK_ENABLE_ON_INIT, 9 .flags = CLK_ENABLE_ON_INIT,
304 .rate = CONFIG_SH_PCLK_FREQ, 10 .rate = CONFIG_SH_PCLK_FREQ,
@@ -368,4 +74,3 @@ int __init __weak arch_clk_init(void)
368{ 74{
369 return cpg_clk_init(); 75 return cpg_clk_init();
370} 76}
371#endif /* CONFIG_SH_CPG_CLK_LEGACY */
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