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Diffstat (limited to 'arch/arm/plat-samsung/clock.c')
-rw-r--r--arch/arm/plat-samsung/clock.c98
1 files changed, 6 insertions, 92 deletions
diff --git a/arch/arm/plat-samsung/clock.c b/arch/arm/plat-samsung/clock.c
index 0c9f95d98561..302c42670bd1 100644
--- a/arch/arm/plat-samsung/clock.c
+++ b/arch/arm/plat-samsung/clock.c
@@ -71,74 +71,6 @@ static int clk_null_enable(struct clk *clk, int enable)
71 return 0; 71 return 0;
72} 72}
73 73
74static int dev_is_s3c_uart(struct device *dev)
75{
76 struct platform_device **pdev = s3c24xx_uart_devs;
77 int i;
78 for (i = 0; i < ARRAY_SIZE(s3c24xx_uart_devs); i++, pdev++)
79 if (*pdev && dev == &(*pdev)->dev)
80 return 1;
81 return 0;
82}
83
84/*
85 * Serial drivers call get_clock() very early, before platform bus
86 * has been set up, this requires a special check to let them get
87 * a proper clock
88 */
89
90static int dev_is_platform_device(struct device *dev)
91{
92 return dev->bus == &platform_bus_type ||
93 (dev->bus == NULL && dev_is_s3c_uart(dev));
94}
95
96/* Clock API calls */
97
98struct clk *clk_get(struct device *dev, const char *id)
99{
100 struct clk *p;
101 struct clk *clk = ERR_PTR(-ENOENT);
102 int idno;
103
104 if (dev == NULL || !dev_is_platform_device(dev))
105 idno = -1;
106 else
107 idno = to_platform_device(dev)->id;
108
109 spin_lock(&clocks_lock);
110
111 list_for_each_entry(p, &clocks, list) {
112 if (p->id == idno &&
113 strcmp(id, p->name) == 0 &&
114 try_module_get(p->owner)) {
115 clk = p;
116 break;
117 }
118 }
119
120 /* check for the case where a device was supplied, but the
121 * clock that was being searched for is not device specific */
122
123 if (IS_ERR(clk)) {
124 list_for_each_entry(p, &clocks, list) {
125 if (p->id == -1 && strcmp(id, p->name) == 0 &&
126 try_module_get(p->owner)) {
127 clk = p;
128 break;
129 }
130 }
131 }
132
133 spin_unlock(&clocks_lock);
134 return clk;
135}
136
137void clk_put(struct clk *clk)
138{
139 module_put(clk->owner);
140}
141
142int clk_enable(struct clk *clk) 74int clk_enable(struct clk *clk)
143{ 75{
144 if (IS_ERR(clk) || clk == NULL) 76 if (IS_ERR(clk) || clk == NULL)
@@ -241,8 +173,6 @@ int clk_set_parent(struct clk *clk, struct clk *parent)
241 return ret; 173 return ret;
242} 174}
243 175
244EXPORT_SYMBOL(clk_get);
245EXPORT_SYMBOL(clk_put);
246EXPORT_SYMBOL(clk_enable); 176EXPORT_SYMBOL(clk_enable);
247EXPORT_SYMBOL(clk_disable); 177EXPORT_SYMBOL(clk_disable);
248EXPORT_SYMBOL(clk_get_rate); 178EXPORT_SYMBOL(clk_get_rate);
@@ -265,7 +195,6 @@ struct clk_ops clk_ops_def_setrate = {
265 195
266struct clk clk_xtal = { 196struct clk clk_xtal = {
267 .name = "xtal", 197 .name = "xtal",
268 .id = -1,
269 .rate = 0, 198 .rate = 0,
270 .parent = NULL, 199 .parent = NULL,
271 .ctrlbit = 0, 200 .ctrlbit = 0,
@@ -273,30 +202,25 @@ struct clk clk_xtal = {
273 202
274struct clk clk_ext = { 203struct clk clk_ext = {
275 .name = "ext", 204 .name = "ext",
276 .id = -1,
277}; 205};
278 206
279struct clk clk_epll = { 207struct clk clk_epll = {
280 .name = "epll", 208 .name = "epll",
281 .id = -1,
282}; 209};
283 210
284struct clk clk_mpll = { 211struct clk clk_mpll = {
285 .name = "mpll", 212 .name = "mpll",
286 .id = -1,
287 .ops = &clk_ops_def_setrate, 213 .ops = &clk_ops_def_setrate,
288}; 214};
289 215
290struct clk clk_upll = { 216struct clk clk_upll = {
291 .name = "upll", 217 .name = "upll",
292 .id = -1,
293 .parent = NULL, 218 .parent = NULL,
294 .ctrlbit = 0, 219 .ctrlbit = 0,
295}; 220};
296 221
297struct clk clk_f = { 222struct clk clk_f = {
298 .name = "fclk", 223 .name = "fclk",
299 .id = -1,
300 .rate = 0, 224 .rate = 0,
301 .parent = &clk_mpll, 225 .parent = &clk_mpll,
302 .ctrlbit = 0, 226 .ctrlbit = 0,
@@ -304,7 +228,6 @@ struct clk clk_f = {
304 228
305struct clk clk_h = { 229struct clk clk_h = {
306 .name = "hclk", 230 .name = "hclk",
307 .id = -1,
308 .rate = 0, 231 .rate = 0,
309 .parent = NULL, 232 .parent = NULL,
310 .ctrlbit = 0, 233 .ctrlbit = 0,
@@ -313,7 +236,6 @@ struct clk clk_h = {
313 236
314struct clk clk_p = { 237struct clk clk_p = {
315 .name = "pclk", 238 .name = "pclk",
316 .id = -1,
317 .rate = 0, 239 .rate = 0,
318 .parent = NULL, 240 .parent = NULL,
319 .ctrlbit = 0, 241 .ctrlbit = 0,
@@ -322,7 +244,6 @@ struct clk clk_p = {
322 244
323struct clk clk_usb_bus = { 245struct clk clk_usb_bus = {
324 .name = "usb-bus", 246 .name = "usb-bus",
325 .id = -1,
326 .rate = 0, 247 .rate = 0,
327 .parent = &clk_upll, 248 .parent = &clk_upll,
328}; 249};
@@ -330,7 +251,6 @@ struct clk clk_usb_bus = {
330 251
331struct clk s3c24xx_uclk = { 252struct clk s3c24xx_uclk = {
332 .name = "uclk", 253 .name = "uclk",
333 .id = -1,
334}; 254};
335 255
336/* initialise the clock system */ 256/* initialise the clock system */
@@ -346,14 +266,11 @@ int s3c24xx_register_clock(struct clk *clk)
346 if (clk->enable == NULL) 266 if (clk->enable == NULL)
347 clk->enable = clk_null_enable; 267 clk->enable = clk_null_enable;
348 268
349 /* add to the list of available clocks */ 269 /* fill up the clk_lookup structure and register it*/
350 270 clk->lookup.dev_id = clk->devname;
351 /* Quick check to see if this clock has already been registered. */ 271 clk->lookup.con_id = clk->name;
352 BUG_ON(clk->list.prev != clk->list.next); 272 clk->lookup.clk = clk;
353 273 clkdev_add(&clk->lookup);
354 spin_lock(&clocks_lock);
355 list_add(&clk->list, &clocks);
356 spin_unlock(&clocks_lock);
357 274
358 return 0; 275 return 0;
359} 276}
@@ -463,10 +380,7 @@ static int clk_debugfs_register_one(struct clk *c)
463 char s[255]; 380 char s[255];
464 char *p = s; 381 char *p = s;
465 382
466 p += sprintf(p, "%s", c->name); 383 p += sprintf(p, "%s", c->devname);
467
468 if (c->id >= 0)
469 sprintf(p, ":%d", c->id);
470 384
471 d = debugfs_create_dir(s, pa ? pa->dent : clk_debugfs_root); 385 d = debugfs_create_dir(s, pa ? pa->dent : clk_debugfs_root);
472 if (!d) 386 if (!d)