summaryrefslogtreecommitdiff
path: root/target/linux/lantiq/patches-3.2/0025-MIPS-lantiq-convert-to-clkdev-api.patch
blob: d2709e9e472bbd62ae3d1fcfbe5189b2d15f1936 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
From 25db3804c7c9ed3ee5161b00b38de84b1d19f6a8 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Thu, 8 Mar 2012 08:39:06 +0100
Subject: [PATCH 25/70] MIPS: lantiq: convert to clkdev api

* Change setup from HAVE_CLK -> HAVE_MACH_CLKDEV/CLKDEV_LOOKUP
* Add clk_activate/clk_deactivate
* Add better error paths to the clk_*() functions
* Change the way our static clocks are referenced

Signed-off-by: John Crispin <blogic@openwrt.org>
---
 arch/mips/Kconfig                          |    3 +-
 arch/mips/include/asm/mach-lantiq/lantiq.h |   20 ++----
 arch/mips/lantiq/clk.c                     |   96 +++++++++++++++------------
 arch/mips/lantiq/clk.h                     |   52 ++++++++++++++-
 arch/mips/lantiq/prom.c                    |    1 -
 5 files changed, 111 insertions(+), 61 deletions(-)

--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -225,7 +225,8 @@ config LANTIQ
 	select ARCH_REQUIRE_GPIOLIB
 	select SWAP_IO_SPACE
 	select BOOT_RAW
-	select HAVE_CLK
+	select HAVE_MACH_CLKDEV
+	select CLKDEV_LOOKUP
 	select HAVE_OPROFILE
 	select MIPS_MACHINE
 
--- a/arch/mips/include/asm/mach-lantiq/lantiq.h
+++ b/arch/mips/include/asm/mach-lantiq/lantiq.h
@@ -9,6 +9,7 @@
 #define _LANTIQ_H__
 
 #include <linux/irq.h>
+#include <linux/clk.h>
 #include <linux/ioport.h>
 
 /* generic reg access functions */
@@ -22,18 +23,6 @@
 extern unsigned int ltq_get_cpu_ver(void);
 extern unsigned int ltq_get_soc_type(void);
 
-/* clock speeds */
-#define CLOCK_60M	60000000
-#define CLOCK_83M	83333333
-#define CLOCK_100M	100000000
-#define CLOCK_111M	111111111
-#define CLOCK_133M	133333333
-#define CLOCK_167M	166666667
-#define CLOCK_200M	200000000
-#define CLOCK_266M	266666666
-#define CLOCK_333M	333333333
-#define CLOCK_400M	400000000
-
 /* spinlock all ebu i/o */
 extern spinlock_t ebu_lock;
 
@@ -46,6 +35,13 @@ extern void ltq_disable_irq(struct irq_d
 extern void ltq_mask_and_ack_irq(struct irq_data *data);
 extern void ltq_enable_irq(struct irq_data *data);
 
+/* clock handling */
+extern int clk_activate(struct clk *clk);
+extern void clk_deactivate(struct clk *clk);
+extern struct clk *clk_get_cpu(void);
+extern struct clk *clk_get_fpi(void);
+extern struct clk *clk_get_io(void);
+
 /* find out what caused the last cpu reset */
 extern int ltq_reset_cause(void);
 
--- a/arch/mips/lantiq/clk.c
+++ b/arch/mips/lantiq/clk.c
@@ -12,6 +12,7 @@
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/clk.h>
+#include <linux/clkdev.h>
 #include <linux/err.h>
 #include <linux/list.h>
 
@@ -24,33 +25,29 @@
 #include "clk.h"
 #include "prom.h"
 
-struct clk {
-	const char *name;
-	unsigned long rate;
-	unsigned long (*get_rate) (void);
-};
+/* lantiq socs have 3 static clocks */
+static struct clk cpu_clk_generic[3];
 
-static struct clk *cpu_clk;
-static int cpu_clk_cnt;
+void clkdev_add_static(unsigned long cpu, unsigned long fpi, unsigned long io)
+{
+	cpu_clk_generic[0].rate = cpu;
+	cpu_clk_generic[1].rate = fpi;
+	cpu_clk_generic[2].rate = io;
+}
 
-/* lantiq socs have 3 static clocks */
-static struct clk cpu_clk_generic[] = {
-	{
-		.name = "cpu",
-		.get_rate = ltq_get_cpu_hz,
-	}, {
-		.name = "fpi",
-		.get_rate = ltq_get_fpi_hz,
-	}, {
-		.name = "io",
-		.get_rate = ltq_get_io_region_clock,
-	},
-};
+struct clk *clk_get_cpu(void)
+{
+	return &cpu_clk_generic[0];
+}
+
+struct clk *clk_get_fpi(void)
+{
+	return &cpu_clk_generic[1];
+}
 
-void clk_init(void)
+struct clk *clk_get_io(void)
 {
-	cpu_clk = cpu_clk_generic;
-	cpu_clk_cnt = ARRAY_SIZE(cpu_clk_generic);
+	return &cpu_clk_generic[2];
 }
 
 static inline int clk_good(struct clk *clk)
@@ -73,36 +70,49 @@ unsigned long clk_get_rate(struct clk *c
 }
 EXPORT_SYMBOL(clk_get_rate);
 
-struct clk *clk_get(struct device *dev, const char *id)
+int clk_enable(struct clk *clk)
 {
-	int i;
+	if (unlikely(!clk_good(clk)))
+		return -1;
 
-	for (i = 0; i < cpu_clk_cnt; i++)
-		if (!strcmp(id, cpu_clk[i].name))
-			return &cpu_clk[i];
-	BUG();
-	return ERR_PTR(-ENOENT);
+	if (clk->enable)
+		return clk->enable(clk);
+
+	return -1;
 }
-EXPORT_SYMBOL(clk_get);
+EXPORT_SYMBOL(clk_enable);
 
-void clk_put(struct clk *clk)
+void clk_disable(struct clk *clk)
 {
-	/* not used */
+	if (unlikely(!clk_good(clk)))
+		return;
+
+	if (clk->disable)
+		clk->disable(clk);
 }
-EXPORT_SYMBOL(clk_put);
+EXPORT_SYMBOL(clk_disable);
 
-int clk_enable(struct clk *clk)
+int clk_activate(struct clk *clk)
 {
-	/* not used */
-	return 0;
+	if (unlikely(!clk_good(clk)))
+		return -1;
+
+	if (clk->activate)
+		return clk->activate(clk);
+
+	return -1;
 }
-EXPORT_SYMBOL(clk_enable);
+EXPORT_SYMBOL(clk_activate);
 
-void clk_disable(struct clk *clk)
+void clk_deactivate(struct clk *clk)
 {
-	/* not used */
+	if (unlikely(!clk_good(clk)))
+		return;
+
+	if (clk->deactivate)
+		clk->deactivate(clk);
 }
-EXPORT_SYMBOL(clk_disable);
+EXPORT_SYMBOL(clk_deactivate);
 
 static inline u32 ltq_get_counter_resolution(void)
 {
@@ -126,7 +136,7 @@ void __init plat_time_init(void)
 
 	ltq_soc_init();
 
-	clk = clk_get(0, "cpu");
+	clk = clk_get_cpu();
 	mips_hpt_frequency = clk_get_rate(clk) / ltq_get_counter_resolution();
 	write_c0_compare(read_c0_count());
 	pr_info("CPU Clock: %ldMHz\n", clk_get_rate(clk) / 1000000);
--- a/arch/mips/lantiq/clk.h
+++ b/arch/mips/lantiq/clk.h
@@ -9,10 +9,54 @@
 #ifndef _LTQ_CLK_H__
 #define _LTQ_CLK_H__
 
-extern void clk_init(void);
+#include <linux/clkdev.h>
 
-extern unsigned long ltq_get_cpu_hz(void);
-extern unsigned long ltq_get_fpi_hz(void);
-extern unsigned long ltq_get_io_region_clock(void);
+/* clock speeds */
+#define CLOCK_60M	60000000
+#define CLOCK_62_5M	62500000
+#define CLOCK_83M	83333333
+#define CLOCK_83_5M	83500000
+#define CLOCK_98_304M	98304000
+#define CLOCK_100M	100000000
+#define CLOCK_111M	111111111
+#define CLOCK_125M	125000000
+#define CLOCK_133M	133333333
+#define CLOCK_150M	150000000
+#define CLOCK_166M	166666666
+#define CLOCK_167M	166666667
+#define CLOCK_196_608M	196608000
+#define CLOCK_200M	200000000
+#define CLOCK_250M	250000000
+#define CLOCK_266M	266666666
+#define CLOCK_300M	300000000
+#define CLOCK_333M	333333333
+#define CLOCK_393M	393215332
+#define CLOCK_400M	400000000
+#define CLOCK_500M	500000000
+#define CLOCK_600M	600000000
+
+struct clk {
+	struct clk_lookup cl;
+	unsigned long rate;
+	unsigned long (*get_rate) (void);
+	unsigned int module;
+	unsigned int bits;
+	int (*enable) (struct clk *clk);
+	void (*disable) (struct clk *clk);
+	int (*activate) (struct clk *clk);
+	void (*deactivate) (struct clk *clk);
+	void (*reboot) (struct clk *clk);
+};
+
+extern void clkdev_add_static(unsigned long cpu, unsigned long fpi,
+					unsigned long io);
+
+extern unsigned long ltq_danube_cpu_hz(void);
+extern unsigned long ltq_danube_fpi_hz(void);
+extern unsigned long ltq_danube_io_region_clock(void);
+
+extern unsigned long ltq_vr9_cpu_hz(void);
+extern unsigned long ltq_vr9_fpi_hz(void);
+extern unsigned long ltq_vr9_io_region_clock(void);
 
 #endif
--- a/arch/mips/lantiq/prom.c
+++ b/arch/mips/lantiq/prom.c
@@ -103,7 +103,6 @@ EXPORT_SYMBOL(ltq_remap_resource);
 void __init prom_init(void)
 {
 	ltq_soc_detect(&soc_info);
-	clk_init();
 	snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev %s",
 		soc_info.name, soc_info.rev_type);
 	soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0';