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1/*
2 * TI clock support
3 *
4 * Copyright (C) 2013 Texas Instruments, Inc.
5 *
6 * Tero Kristo <t-kristo@ti.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
13 * kind, whether express or implied; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
18#include <linux/clk.h>
19#include <linux/clk-provider.h>
20#include <linux/clkdev.h>
21#include <linux/clk/ti.h>
22#include <linux/of.h>
23#include <linux/of_address.h>
24#include <linux/list.h>
25#include <linux/regmap.h>
26#include <linux/bootmem.h>
27
28#include "clock.h"
29
30#undef pr_fmt
31#define pr_fmt(fmt) "%s: " fmt, __func__
32
33struct ti_clk_ll_ops *ti_clk_ll_ops;
34static struct device_node *clocks_node_ptr[CLK_MAX_MEMMAPS];
35
36static struct ti_clk_features ti_clk_features;
37
38struct clk_iomap {
39 struct regmap *regmap;
40 void __iomem *mem;
41};
42
43static struct clk_iomap *clk_memmaps[CLK_MAX_MEMMAPS];
44
45static void clk_memmap_writel(u32 val, void __iomem *reg)
46{
47 struct clk_omap_reg *r = (struct clk_omap_reg *)®
48 struct clk_iomap *io = clk_memmaps[r->index];
49
50 if (io->regmap)
51 regmap_write(io->regmap, r->offset, val);
52 else
53 writel_relaxed(val, io->mem + r->offset);
54}
55
56static u32 clk_memmap_readl(void __iomem *reg)
57{
58 u32 val;
59 struct clk_omap_reg *r = (struct clk_omap_reg *)®
60 struct clk_iomap *io = clk_memmaps[r->index];
61
62 if (io->regmap)
63 regmap_read(io->regmap, r->offset, &val);
64 else
65 val = readl_relaxed(io->mem + r->offset);
66
67 return val;
68}
69
70/**
71 * ti_clk_setup_ll_ops - setup low level clock operations
72 * @ops: low level clock ops descriptor
73 *
74 * Sets up low level clock operations for TI clock driver. This is used
75 * to provide various callbacks for the clock driver towards platform
76 * specific code. Returns 0 on success, -EBUSY if ll_ops have been
77 * registered already.
78 */
79int ti_clk_setup_ll_ops(struct ti_clk_ll_ops *ops)
80{
81 if (ti_clk_ll_ops) {
82 pr_err("Attempt to register ll_ops multiple times.\n");
83 return -EBUSY;
84 }
85
86 ti_clk_ll_ops = ops;
87 ops->clk_readl = clk_memmap_readl;
88 ops->clk_writel = clk_memmap_writel;
89
90 return 0;
91}
92
93/**
94 * ti_dt_clocks_register - register DT alias clocks during boot
95 * @oclks: list of clocks to register
96 *
97 * Register alias or non-standard DT clock entries during boot. By
98 * default, DT clocks are found based on their node name. If any
99 * additional con-id / dev-id -> clock mapping is required, use this
100 * function to list these.
101 */
102void __init ti_dt_clocks_register(struct ti_dt_clk oclks[])
103{
104 struct ti_dt_clk *c;
105 struct device_node *node;
106 struct clk *clk;
107 struct of_phandle_args clkspec;
108
109 for (c = oclks; c->node_name != NULL; c++) {
110 node = of_find_node_by_name(NULL, c->node_name);
111 clkspec.np = node;
112 clk = of_clk_get_from_provider(&clkspec);
113
114 if (!IS_ERR(clk)) {
115 c->lk.clk = clk;
116 clkdev_add(&c->lk);
117 } else {
118 pr_warn("failed to lookup clock node %s\n",
119 c->node_name);
120 }
121 }
122}
123
124struct clk_init_item {
125 struct device_node *node;
126 struct clk_hw *hw;
127 ti_of_clk_init_cb_t func;
128 struct list_head link;
129};
130
131static LIST_HEAD(retry_list);
132
133/**
134 * ti_clk_retry_init - retries a failed clock init at later phase
135 * @node: device not for the clock
136 * @hw: partially initialized clk_hw struct for the clock
137 * @func: init function to be called for the clock
138 *
139 * Adds a failed clock init to the retry list. The retry list is parsed
140 * once all the other clocks have been initialized.
141 */
142int __init ti_clk_retry_init(struct device_node *node, struct clk_hw *hw,
143 ti_of_clk_init_cb_t func)
144{
145 struct clk_init_item *retry;
146
147 pr_debug("%s: adding to retry list...\n", node->name);
148 retry = kzalloc(sizeof(*retry), GFP_KERNEL);
149 if (!retry)
150 return -ENOMEM;
151
152 retry->node = node;
153 retry->func = func;
154 retry->hw = hw;
155 list_add(&retry->link, &retry_list);
156
157 return 0;
158}
159
160/**
161 * ti_clk_get_reg_addr - get register address for a clock register
162 * @node: device node for the clock
163 * @index: register index from the clock node
164 *
165 * Builds clock register address from device tree information. This
166 * is a struct of type clk_omap_reg. Returns a pointer to the register
167 * address, or a pointer error value in failure.
168 */
169void __iomem *ti_clk_get_reg_addr(struct device_node *node, int index)
170{
171 struct clk_omap_reg *reg;
172 u32 val;
173 u32 tmp;
174 int i;
175
176 reg = (struct clk_omap_reg *)&tmp;
177
178 for (i = 0; i < CLK_MAX_MEMMAPS; i++) {
179 if (clocks_node_ptr[i] == node->parent)
180 break;
181 }
182
183 if (i == CLK_MAX_MEMMAPS) {
184 pr_err("clk-provider not found for %s!\n", node->name);
185 return IOMEM_ERR_PTR(-ENOENT);
186 }
187
188 reg->index = i;
189
190 if (of_property_read_u32_index(node, "reg", index, &val)) {
191 pr_err("%s must have reg[%d]!\n", node->name, index);
192 return IOMEM_ERR_PTR(-EINVAL);
193 }
194
195 reg->offset = val;
196
197 return (__force void __iomem *)tmp;
198}
199
200/**
201 * omap2_clk_provider_init - init master clock provider
202 * @parent: master node
203 * @index: internal index for clk_reg_ops
204 * @syscon: syscon regmap pointer for accessing clock registers
205 * @mem: iomem pointer for the clock provider memory area, only used if
206 * syscon is not provided
207 *
208 * Initializes a master clock IP block. This basically sets up the
209 * mapping from clocks node to the memory map index. All the clocks
210 * are then initialized through the common of_clk_init call, and the
211 * clocks will access their memory maps based on the node layout.
212 * Returns 0 in success.
213 */
214int __init omap2_clk_provider_init(struct device_node *parent, int index,
215 struct regmap *syscon, void __iomem *mem)
216{
217 struct device_node *clocks;
218 struct clk_iomap *io;
219
220 /* get clocks for this parent */
221 clocks = of_get_child_by_name(parent, "clocks");
222 if (!clocks) {
223 pr_err("%s missing 'clocks' child node.\n", parent->name);
224 return -EINVAL;
225 }
226
227 /* add clocks node info */
228 clocks_node_ptr[index] = clocks;
229
230 io = kzalloc(sizeof(*io), GFP_KERNEL);
231 if (!io)
232 return -ENOMEM;
233
234 io->regmap = syscon;
235 io->mem = mem;
236
237 clk_memmaps[index] = io;
238
239 return 0;
240}
241
242/**
243 * omap2_clk_legacy_provider_init - initialize a legacy clock provider
244 * @index: index for the clock provider
245 * @mem: iomem pointer for the clock provider memory area
246 *
247 * Initializes a legacy clock provider memory mapping.
248 */
249void __init omap2_clk_legacy_provider_init(int index, void __iomem *mem)
250{
251 struct clk_iomap *io;
252
253 io = memblock_virt_alloc(sizeof(*io), 0);
254
255 io->mem = mem;
256
257 clk_memmaps[index] = io;
258}
259
260/**
261 * ti_dt_clk_init_retry_clks - init clocks from the retry list
262 *
263 * Initializes any clocks that have failed to initialize before,
264 * reasons being missing parent node(s) during earlier init. This
265 * typically happens only for DPLLs which need to have both of their
266 * parent clocks ready during init.
267 */
268void ti_dt_clk_init_retry_clks(void)
269{
270 struct clk_init_item *retry;
271 struct clk_init_item *tmp;
272 int retries = 5;
273
274 while (!list_empty(&retry_list) && retries) {
275 list_for_each_entry_safe(retry, tmp, &retry_list, link) {
276 pr_debug("retry-init: %s\n", retry->node->name);
277 retry->func(retry->hw, retry->node);
278 list_del(&retry->link);
279 kfree(retry);
280 }
281 retries--;
282 }
283}
284
285#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_ATAGS)
286void __init ti_clk_patch_legacy_clks(struct ti_clk **patch)
287{
288 while (*patch) {
289 memcpy((*patch)->patch, *patch, sizeof(**patch));
290 patch++;
291 }
292}
293
294struct clk __init *ti_clk_register_clk(struct ti_clk *setup)
295{
296 struct clk *clk;
297 struct ti_clk_fixed *fixed;
298 struct ti_clk_fixed_factor *fixed_factor;
299 struct clk_hw *clk_hw;
300
301 if (setup->clk)
302 return setup->clk;
303
304 switch (setup->type) {
305 case TI_CLK_FIXED:
306 fixed = setup->data;
307
308 clk = clk_register_fixed_rate(NULL, setup->name, NULL, 0,
309 fixed->frequency);
310 break;
311 case TI_CLK_MUX:
312 clk = ti_clk_register_mux(setup);
313 break;
314 case TI_CLK_DIVIDER:
315 clk = ti_clk_register_divider(setup);
316 break;
317 case TI_CLK_COMPOSITE:
318 clk = ti_clk_register_composite(setup);
319 break;
320 case TI_CLK_FIXED_FACTOR:
321 fixed_factor = setup->data;
322
323 clk = clk_register_fixed_factor(NULL, setup->name,
324 fixed_factor->parent,
325 0, fixed_factor->mult,
326 fixed_factor->div);
327 break;
328 case TI_CLK_GATE:
329 clk = ti_clk_register_gate(setup);
330 break;
331 case TI_CLK_DPLL:
332 clk = ti_clk_register_dpll(setup);
333 break;
334 default:
335 pr_err("bad type for %s!\n", setup->name);
336 clk = ERR_PTR(-EINVAL);
337 }
338
339 if (!IS_ERR(clk)) {
340 setup->clk = clk;
341 if (setup->clkdm_name) {
342 clk_hw = __clk_get_hw(clk);
343 if (clk_hw_get_flags(clk_hw) & CLK_IS_BASIC) {
344 pr_warn("can't setup clkdm for basic clk %s\n",
345 setup->name);
346 } else {
347 to_clk_hw_omap(clk_hw)->clkdm_name =
348 setup->clkdm_name;
349 omap2_init_clk_clkdm(clk_hw);
350 }
351 }
352 }
353
354 return clk;
355}
356
357int __init ti_clk_register_legacy_clks(struct ti_clk_alias *clks)
358{
359 struct clk *clk;
360 bool retry;
361 struct ti_clk_alias *retry_clk;
362 struct ti_clk_alias *tmp;
363
364 while (clks->clk) {
365 clk = ti_clk_register_clk(clks->clk);
366 if (IS_ERR(clk)) {
367 if (PTR_ERR(clk) == -EAGAIN) {
368 list_add(&clks->link, &retry_list);
369 } else {
370 pr_err("register for %s failed: %ld\n",
371 clks->clk->name, PTR_ERR(clk));
372 return PTR_ERR(clk);
373 }
374 } else {
375 clks->lk.clk = clk;
376 clkdev_add(&clks->lk);
377 }
378 clks++;
379 }
380
381 retry = true;
382
383 while (!list_empty(&retry_list) && retry) {
384 retry = false;
385 list_for_each_entry_safe(retry_clk, tmp, &retry_list, link) {
386 pr_debug("retry-init: %s\n", retry_clk->clk->name);
387 clk = ti_clk_register_clk(retry_clk->clk);
388 if (IS_ERR(clk)) {
389 if (PTR_ERR(clk) == -EAGAIN) {
390 continue;
391 } else {
392 pr_err("register for %s failed: %ld\n",
393 retry_clk->clk->name,
394 PTR_ERR(clk));
395 return PTR_ERR(clk);
396 }
397 } else {
398 retry = true;
399 retry_clk->lk.clk = clk;
400 clkdev_add(&retry_clk->lk);
401 list_del(&retry_clk->link);
402 }
403 }
404 }
405
406 return 0;
407}
408#endif
409
410/**
411 * ti_clk_setup_features - setup clock features flags
412 * @features: features definition to use
413 *
414 * Initializes the clock driver features flags based on platform
415 * provided data. No return value.
416 */
417void __init ti_clk_setup_features(struct ti_clk_features *features)
418{
419 memcpy(&ti_clk_features, features, sizeof(*features));
420}
421
422/**
423 * ti_clk_get_features - get clock driver features flags
424 *
425 * Get TI clock driver features description. Returns a pointer
426 * to the current feature setup.
427 */
428const struct ti_clk_features *ti_clk_get_features(void)
429{
430 return &ti_clk_features;
431}
432
433/**
434 * omap2_clk_enable_init_clocks - prepare & enable a list of clocks
435 * @clk_names: ptr to an array of strings of clock names to enable
436 * @num_clocks: number of clock names in @clk_names
437 *
438 * Prepare and enable a list of clocks, named by @clk_names. No
439 * return value. XXX Deprecated; only needed until these clocks are
440 * properly claimed and enabled by the drivers or core code that uses
441 * them. XXX What code disables & calls clk_put on these clocks?
442 */
443void omap2_clk_enable_init_clocks(const char **clk_names, u8 num_clocks)
444{
445 struct clk *init_clk;
446 int i;
447
448 for (i = 0; i < num_clocks; i++) {
449 init_clk = clk_get(NULL, clk_names[i]);
450 if (WARN(IS_ERR(init_clk), "could not find init clock %s\n",
451 clk_names[i]))
452 continue;
453 clk_prepare_enable(init_clk);
454 }
455}
1/*
2 * TI clock support
3 *
4 * Copyright (C) 2013 Texas Instruments, Inc.
5 *
6 * Tero Kristo <t-kristo@ti.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
13 * kind, whether express or implied; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
18#include <linux/clk.h>
19#include <linux/clk-provider.h>
20#include <linux/clkdev.h>
21#include <linux/clk/ti.h>
22#include <linux/of.h>
23#include <linux/of_address.h>
24#include <linux/list.h>
25#include <linux/regmap.h>
26#include <linux/bootmem.h>
27
28#include "clock.h"
29
30#undef pr_fmt
31#define pr_fmt(fmt) "%s: " fmt, __func__
32
33struct ti_clk_ll_ops *ti_clk_ll_ops;
34static struct device_node *clocks_node_ptr[CLK_MAX_MEMMAPS];
35
36static struct ti_clk_features ti_clk_features;
37
38struct clk_iomap {
39 struct regmap *regmap;
40 void __iomem *mem;
41};
42
43static struct clk_iomap *clk_memmaps[CLK_MAX_MEMMAPS];
44
45static void clk_memmap_writel(u32 val, void __iomem *reg)
46{
47 struct clk_omap_reg *r = (struct clk_omap_reg *)®
48 struct clk_iomap *io = clk_memmaps[r->index];
49
50 if (io->regmap)
51 regmap_write(io->regmap, r->offset, val);
52 else
53 writel_relaxed(val, io->mem + r->offset);
54}
55
56static u32 clk_memmap_readl(void __iomem *reg)
57{
58 u32 val;
59 struct clk_omap_reg *r = (struct clk_omap_reg *)®
60 struct clk_iomap *io = clk_memmaps[r->index];
61
62 if (io->regmap)
63 regmap_read(io->regmap, r->offset, &val);
64 else
65 val = readl_relaxed(io->mem + r->offset);
66
67 return val;
68}
69
70/**
71 * ti_clk_setup_ll_ops - setup low level clock operations
72 * @ops: low level clock ops descriptor
73 *
74 * Sets up low level clock operations for TI clock driver. This is used
75 * to provide various callbacks for the clock driver towards platform
76 * specific code. Returns 0 on success, -EBUSY if ll_ops have been
77 * registered already.
78 */
79int ti_clk_setup_ll_ops(struct ti_clk_ll_ops *ops)
80{
81 if (ti_clk_ll_ops) {
82 pr_err("Attempt to register ll_ops multiple times.\n");
83 return -EBUSY;
84 }
85
86 ti_clk_ll_ops = ops;
87 ops->clk_readl = clk_memmap_readl;
88 ops->clk_writel = clk_memmap_writel;
89
90 return 0;
91}
92
93/**
94 * ti_dt_clocks_register - register DT alias clocks during boot
95 * @oclks: list of clocks to register
96 *
97 * Register alias or non-standard DT clock entries during boot. By
98 * default, DT clocks are found based on their node name. If any
99 * additional con-id / dev-id -> clock mapping is required, use this
100 * function to list these.
101 */
102void __init ti_dt_clocks_register(struct ti_dt_clk oclks[])
103{
104 struct ti_dt_clk *c;
105 struct device_node *node;
106 struct clk *clk;
107 struct of_phandle_args clkspec;
108
109 for (c = oclks; c->node_name != NULL; c++) {
110 node = of_find_node_by_name(NULL, c->node_name);
111 clkspec.np = node;
112 clk = of_clk_get_from_provider(&clkspec);
113
114 if (!IS_ERR(clk)) {
115 c->lk.clk = clk;
116 clkdev_add(&c->lk);
117 } else {
118 pr_warn("failed to lookup clock node %s\n",
119 c->node_name);
120 }
121 }
122}
123
124struct clk_init_item {
125 struct device_node *node;
126 struct clk_hw *hw;
127 ti_of_clk_init_cb_t func;
128 struct list_head link;
129};
130
131static LIST_HEAD(retry_list);
132
133/**
134 * ti_clk_retry_init - retries a failed clock init at later phase
135 * @node: device not for the clock
136 * @hw: partially initialized clk_hw struct for the clock
137 * @func: init function to be called for the clock
138 *
139 * Adds a failed clock init to the retry list. The retry list is parsed
140 * once all the other clocks have been initialized.
141 */
142int __init ti_clk_retry_init(struct device_node *node, struct clk_hw *hw,
143 ti_of_clk_init_cb_t func)
144{
145 struct clk_init_item *retry;
146
147 pr_debug("%s: adding to retry list...\n", node->name);
148 retry = kzalloc(sizeof(*retry), GFP_KERNEL);
149 if (!retry)
150 return -ENOMEM;
151
152 retry->node = node;
153 retry->func = func;
154 retry->hw = hw;
155 list_add(&retry->link, &retry_list);
156
157 return 0;
158}
159
160/**
161 * ti_clk_get_reg_addr - get register address for a clock register
162 * @node: device node for the clock
163 * @index: register index from the clock node
164 *
165 * Builds clock register address from device tree information. This
166 * is a struct of type clk_omap_reg. Returns a pointer to the register
167 * address, or a pointer error value in failure.
168 */
169void __iomem *ti_clk_get_reg_addr(struct device_node *node, int index)
170{
171 struct clk_omap_reg *reg;
172 u32 val;
173 u32 tmp;
174 int i;
175
176 reg = (struct clk_omap_reg *)&tmp;
177
178 for (i = 0; i < CLK_MAX_MEMMAPS; i++) {
179 if (clocks_node_ptr[i] == node->parent)
180 break;
181 }
182
183 if (i == CLK_MAX_MEMMAPS) {
184 pr_err("clk-provider not found for %s!\n", node->name);
185 return IOMEM_ERR_PTR(-ENOENT);
186 }
187
188 reg->index = i;
189
190 if (of_property_read_u32_index(node, "reg", index, &val)) {
191 pr_err("%s must have reg[%d]!\n", node->name, index);
192 return IOMEM_ERR_PTR(-EINVAL);
193 }
194
195 reg->offset = val;
196
197 return (__force void __iomem *)tmp;
198}
199
200/**
201 * omap2_clk_provider_init - init master clock provider
202 * @parent: master node
203 * @index: internal index for clk_reg_ops
204 * @syscon: syscon regmap pointer for accessing clock registers
205 * @mem: iomem pointer for the clock provider memory area, only used if
206 * syscon is not provided
207 *
208 * Initializes a master clock IP block. This basically sets up the
209 * mapping from clocks node to the memory map index. All the clocks
210 * are then initialized through the common of_clk_init call, and the
211 * clocks will access their memory maps based on the node layout.
212 * Returns 0 in success.
213 */
214int __init omap2_clk_provider_init(struct device_node *parent, int index,
215 struct regmap *syscon, void __iomem *mem)
216{
217 struct device_node *clocks;
218 struct clk_iomap *io;
219
220 /* get clocks for this parent */
221 clocks = of_get_child_by_name(parent, "clocks");
222 if (!clocks) {
223 pr_err("%s missing 'clocks' child node.\n", parent->name);
224 return -EINVAL;
225 }
226
227 /* add clocks node info */
228 clocks_node_ptr[index] = clocks;
229
230 io = kzalloc(sizeof(*io), GFP_KERNEL);
231 if (!io)
232 return -ENOMEM;
233
234 io->regmap = syscon;
235 io->mem = mem;
236
237 clk_memmaps[index] = io;
238
239 return 0;
240}
241
242/**
243 * omap2_clk_legacy_provider_init - initialize a legacy clock provider
244 * @index: index for the clock provider
245 * @mem: iomem pointer for the clock provider memory area
246 *
247 * Initializes a legacy clock provider memory mapping.
248 */
249void __init omap2_clk_legacy_provider_init(int index, void __iomem *mem)
250{
251 struct clk_iomap *io;
252
253 io = memblock_virt_alloc(sizeof(*io), 0);
254
255 io->mem = mem;
256
257 clk_memmaps[index] = io;
258}
259
260/**
261 * ti_dt_clk_init_retry_clks - init clocks from the retry list
262 *
263 * Initializes any clocks that have failed to initialize before,
264 * reasons being missing parent node(s) during earlier init. This
265 * typically happens only for DPLLs which need to have both of their
266 * parent clocks ready during init.
267 */
268void ti_dt_clk_init_retry_clks(void)
269{
270 struct clk_init_item *retry;
271 struct clk_init_item *tmp;
272 int retries = 5;
273
274 while (!list_empty(&retry_list) && retries) {
275 list_for_each_entry_safe(retry, tmp, &retry_list, link) {
276 pr_debug("retry-init: %s\n", retry->node->name);
277 retry->func(retry->hw, retry->node);
278 list_del(&retry->link);
279 kfree(retry);
280 }
281 retries--;
282 }
283}
284
285#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_ATAGS)
286void __init ti_clk_patch_legacy_clks(struct ti_clk **patch)
287{
288 while (*patch) {
289 memcpy((*patch)->patch, *patch, sizeof(**patch));
290 patch++;
291 }
292}
293
294struct clk __init *ti_clk_register_clk(struct ti_clk *setup)
295{
296 struct clk *clk;
297 struct ti_clk_fixed *fixed;
298 struct ti_clk_fixed_factor *fixed_factor;
299 struct clk_hw *clk_hw;
300
301 if (setup->clk)
302 return setup->clk;
303
304 switch (setup->type) {
305 case TI_CLK_FIXED:
306 fixed = setup->data;
307
308 clk = clk_register_fixed_rate(NULL, setup->name, NULL, 0,
309 fixed->frequency);
310 break;
311 case TI_CLK_MUX:
312 clk = ti_clk_register_mux(setup);
313 break;
314 case TI_CLK_DIVIDER:
315 clk = ti_clk_register_divider(setup);
316 break;
317 case TI_CLK_COMPOSITE:
318 clk = ti_clk_register_composite(setup);
319 break;
320 case TI_CLK_FIXED_FACTOR:
321 fixed_factor = setup->data;
322
323 clk = clk_register_fixed_factor(NULL, setup->name,
324 fixed_factor->parent,
325 0, fixed_factor->mult,
326 fixed_factor->div);
327 break;
328 case TI_CLK_GATE:
329 clk = ti_clk_register_gate(setup);
330 break;
331 case TI_CLK_DPLL:
332 clk = ti_clk_register_dpll(setup);
333 break;
334 default:
335 pr_err("bad type for %s!\n", setup->name);
336 clk = ERR_PTR(-EINVAL);
337 }
338
339 if (!IS_ERR(clk)) {
340 setup->clk = clk;
341 if (setup->clkdm_name) {
342 clk_hw = __clk_get_hw(clk);
343 if (clk_hw_get_flags(clk_hw) & CLK_IS_BASIC) {
344 pr_warn("can't setup clkdm for basic clk %s\n",
345 setup->name);
346 } else {
347 to_clk_hw_omap(clk_hw)->clkdm_name =
348 setup->clkdm_name;
349 omap2_init_clk_clkdm(clk_hw);
350 }
351 }
352 }
353
354 return clk;
355}
356
357int __init ti_clk_register_legacy_clks(struct ti_clk_alias *clks)
358{
359 struct clk *clk;
360 bool retry;
361 struct ti_clk_alias *retry_clk;
362 struct ti_clk_alias *tmp;
363
364 while (clks->clk) {
365 clk = ti_clk_register_clk(clks->clk);
366 if (IS_ERR(clk)) {
367 if (PTR_ERR(clk) == -EAGAIN) {
368 list_add(&clks->link, &retry_list);
369 } else {
370 pr_err("register for %s failed: %ld\n",
371 clks->clk->name, PTR_ERR(clk));
372 return PTR_ERR(clk);
373 }
374 } else {
375 clks->lk.clk = clk;
376 clkdev_add(&clks->lk);
377 }
378 clks++;
379 }
380
381 retry = true;
382
383 while (!list_empty(&retry_list) && retry) {
384 retry = false;
385 list_for_each_entry_safe(retry_clk, tmp, &retry_list, link) {
386 pr_debug("retry-init: %s\n", retry_clk->clk->name);
387 clk = ti_clk_register_clk(retry_clk->clk);
388 if (IS_ERR(clk)) {
389 if (PTR_ERR(clk) == -EAGAIN) {
390 continue;
391 } else {
392 pr_err("register for %s failed: %ld\n",
393 retry_clk->clk->name,
394 PTR_ERR(clk));
395 return PTR_ERR(clk);
396 }
397 } else {
398 retry = true;
399 retry_clk->lk.clk = clk;
400 clkdev_add(&retry_clk->lk);
401 list_del(&retry_clk->link);
402 }
403 }
404 }
405
406 return 0;
407}
408#endif
409
410/**
411 * ti_clk_setup_features - setup clock features flags
412 * @features: features definition to use
413 *
414 * Initializes the clock driver features flags based on platform
415 * provided data. No return value.
416 */
417void __init ti_clk_setup_features(struct ti_clk_features *features)
418{
419 memcpy(&ti_clk_features, features, sizeof(*features));
420}
421
422/**
423 * ti_clk_get_features - get clock driver features flags
424 *
425 * Get TI clock driver features description. Returns a pointer
426 * to the current feature setup.
427 */
428const struct ti_clk_features *ti_clk_get_features(void)
429{
430 return &ti_clk_features;
431}
432
433/**
434 * omap2_clk_enable_init_clocks - prepare & enable a list of clocks
435 * @clk_names: ptr to an array of strings of clock names to enable
436 * @num_clocks: number of clock names in @clk_names
437 *
438 * Prepare and enable a list of clocks, named by @clk_names. No
439 * return value. XXX Deprecated; only needed until these clocks are
440 * properly claimed and enabled by the drivers or core code that uses
441 * them. XXX What code disables & calls clk_put on these clocks?
442 */
443void omap2_clk_enable_init_clocks(const char **clk_names, u8 num_clocks)
444{
445 struct clk *init_clk;
446 int i;
447
448 for (i = 0; i < num_clocks; i++) {
449 init_clk = clk_get(NULL, clk_names[i]);
450 if (WARN(IS_ERR(init_clk), "could not find init clock %s\n",
451 clk_names[i]))
452 continue;
453 clk_prepare_enable(init_clk);
454 }
455}