This source file includes following definitions.
- pll_write
- pll_read
- pll_get_phy
- hdmi_pll_enable
- hdmi_pll_disable
- find_rate
- hdmi_pll_recalc_rate
- hdmi_pll_round_rate
- hdmi_pll_set_rate
- msm_hdmi_pll_8960_init
1
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7
8 #include <linux/clk-provider.h>
9 #include <linux/delay.h>
10
11 #include "hdmi.h"
12
13 struct hdmi_pll_8960 {
14 struct platform_device *pdev;
15 struct clk_hw clk_hw;
16 void __iomem *mmio;
17
18 unsigned long pixclk;
19 };
20
21 #define hw_clk_to_pll(x) container_of(x, struct hdmi_pll_8960, clk_hw)
22
23
24
25
26
27
28
29
30 struct pll_rate {
31 unsigned long rate;
32 int num_reg;
33 struct {
34 u32 val;
35 u32 reg;
36 } conf[32];
37 };
38
39
40 static const struct pll_rate freqtbl[] = {
41 { 154000000, 14, {
42 { 0x08, REG_HDMI_8960_PHY_PLL_REFCLK_CFG },
43 { 0x20, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG0 },
44 { 0xf9, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG1 },
45 { 0x02, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG0 },
46 { 0x03, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG1 },
47 { 0x3b, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG2 },
48 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG3 },
49 { 0x86, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG4 },
50 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG5 },
51 { 0x0d, REG_HDMI_8960_PHY_PLL_SDM_CFG0 },
52 { 0x4d, REG_HDMI_8960_PHY_PLL_SDM_CFG1 },
53 { 0x5e, REG_HDMI_8960_PHY_PLL_SDM_CFG2 },
54 { 0x42, REG_HDMI_8960_PHY_PLL_SDM_CFG3 },
55 { 0x00, REG_HDMI_8960_PHY_PLL_SDM_CFG4 },
56 }
57 },
58
59 { 148500000, 27, {
60 { 0x02, REG_HDMI_8960_PHY_PLL_REFCLK_CFG },
61 { 0x02, REG_HDMI_8960_PHY_PLL_CHRG_PUMP_CFG },
62 { 0x01, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG0 },
63 { 0x33, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG1 },
64 { 0x2c, REG_HDMI_8960_PHY_PLL_IDAC_ADJ_CFG },
65 { 0x06, REG_HDMI_8960_PHY_PLL_I_VI_KVCO_CFG },
66 { 0x0a, REG_HDMI_8960_PHY_PLL_PWRDN_B },
67 { 0x76, REG_HDMI_8960_PHY_PLL_SDM_CFG0 },
68 { 0x01, REG_HDMI_8960_PHY_PLL_SDM_CFG1 },
69 { 0x4c, REG_HDMI_8960_PHY_PLL_SDM_CFG2 },
70 { 0xc0, REG_HDMI_8960_PHY_PLL_SDM_CFG3 },
71 { 0x00, REG_HDMI_8960_PHY_PLL_SDM_CFG4 },
72 { 0x9a, REG_HDMI_8960_PHY_PLL_SSC_CFG0 },
73 { 0x00, REG_HDMI_8960_PHY_PLL_SSC_CFG1 },
74 { 0x00, REG_HDMI_8960_PHY_PLL_SSC_CFG2 },
75 { 0x00, REG_HDMI_8960_PHY_PLL_SSC_CFG3 },
76 { 0x10, REG_HDMI_8960_PHY_PLL_LOCKDET_CFG0 },
77 { 0x1a, REG_HDMI_8960_PHY_PLL_LOCKDET_CFG1 },
78 { 0x0d, REG_HDMI_8960_PHY_PLL_LOCKDET_CFG2 },
79 { 0xe6, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG0 },
80 { 0x02, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG1 },
81 { 0x3b, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG2 },
82 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG3 },
83 { 0x86, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG4 },
84 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG5 },
85 { 0x33, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG6 },
86 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG7 },
87 }
88 },
89 { 108000000, 13, {
90 { 0x08, REG_HDMI_8960_PHY_PLL_REFCLK_CFG },
91 { 0x21, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG0 },
92 { 0xf9, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG1 },
93 { 0x1c, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG0 },
94 { 0x02, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG1 },
95 { 0x3b, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG2 },
96 { 0x86, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG4 },
97 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG5 },
98 { 0x49, REG_HDMI_8960_PHY_PLL_SDM_CFG0 },
99 { 0x49, REG_HDMI_8960_PHY_PLL_SDM_CFG1 },
100 { 0x00, REG_HDMI_8960_PHY_PLL_SDM_CFG2 },
101 { 0x00, REG_HDMI_8960_PHY_PLL_SDM_CFG3 },
102 { 0x00, REG_HDMI_8960_PHY_PLL_SDM_CFG4 },
103 }
104 },
105
106 { 74250000, 8, {
107 { 0x0a, REG_HDMI_8960_PHY_PLL_PWRDN_B },
108 { 0x12, REG_HDMI_8960_PHY_PLL_REFCLK_CFG },
109 { 0x01, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG0 },
110 { 0x33, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG1 },
111 { 0x76, REG_HDMI_8960_PHY_PLL_SDM_CFG0 },
112 { 0xe6, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG0 },
113 { 0x02, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG1 },
114 { 0x3b, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG2 },
115 }
116 },
117 { 74176000, 14, {
118 { 0x18, REG_HDMI_8960_PHY_PLL_REFCLK_CFG },
119 { 0x20, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG0 },
120 { 0xf9, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG1 },
121 { 0xe5, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG0 },
122 { 0x02, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG1 },
123 { 0x3b, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG2 },
124 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG3 },
125 { 0x86, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG4 },
126 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG5 },
127 { 0x0c, REG_HDMI_8960_PHY_PLL_SDM_CFG0 },
128 { 0x4c, REG_HDMI_8960_PHY_PLL_SDM_CFG1 },
129 { 0x7d, REG_HDMI_8960_PHY_PLL_SDM_CFG2 },
130 { 0xbc, REG_HDMI_8960_PHY_PLL_SDM_CFG3 },
131 { 0x00, REG_HDMI_8960_PHY_PLL_SDM_CFG4 },
132 }
133 },
134 { 65000000, 14, {
135 { 0x18, REG_HDMI_8960_PHY_PLL_REFCLK_CFG },
136 { 0x20, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG0 },
137 { 0xf9, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG1 },
138 { 0x8a, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG0 },
139 { 0x02, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG1 },
140 { 0x3b, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG2 },
141 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG3 },
142 { 0x86, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG4 },
143 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG5 },
144 { 0x0b, REG_HDMI_8960_PHY_PLL_SDM_CFG0 },
145 { 0x4b, REG_HDMI_8960_PHY_PLL_SDM_CFG1 },
146 { 0x7b, REG_HDMI_8960_PHY_PLL_SDM_CFG2 },
147 { 0x09, REG_HDMI_8960_PHY_PLL_SDM_CFG3 },
148 { 0x00, REG_HDMI_8960_PHY_PLL_SDM_CFG4 },
149 }
150 },
151
152 { 27030000, 18, {
153 { 0x0a, REG_HDMI_8960_PHY_PLL_PWRDN_B },
154 { 0x38, REG_HDMI_8960_PHY_PLL_REFCLK_CFG },
155 { 0x02, REG_HDMI_8960_PHY_PLL_CHRG_PUMP_CFG },
156 { 0x20, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG0 },
157 { 0xff, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG1 },
158 { 0x00, REG_HDMI_8960_PHY_PLL_SDM_CFG0 },
159 { 0x4e, REG_HDMI_8960_PHY_PLL_SDM_CFG1 },
160 { 0xd7, REG_HDMI_8960_PHY_PLL_SDM_CFG2 },
161 { 0x03, REG_HDMI_8960_PHY_PLL_SDM_CFG3 },
162 { 0x00, REG_HDMI_8960_PHY_PLL_SDM_CFG4 },
163 { 0x2a, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG0 },
164 { 0x03, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG1 },
165 { 0x3b, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG2 },
166 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG3 },
167 { 0x86, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG4 },
168 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG5 },
169 { 0x33, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG6 },
170 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG7 },
171 }
172 },
173
174 { 27000000, 27, {
175 { 0x32, REG_HDMI_8960_PHY_PLL_REFCLK_CFG },
176 { 0x02, REG_HDMI_8960_PHY_PLL_CHRG_PUMP_CFG },
177 { 0x01, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG0 },
178 { 0x33, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG1 },
179 { 0x2c, REG_HDMI_8960_PHY_PLL_IDAC_ADJ_CFG },
180 { 0x06, REG_HDMI_8960_PHY_PLL_I_VI_KVCO_CFG },
181 { 0x0a, REG_HDMI_8960_PHY_PLL_PWRDN_B },
182 { 0x7b, REG_HDMI_8960_PHY_PLL_SDM_CFG0 },
183 { 0x01, REG_HDMI_8960_PHY_PLL_SDM_CFG1 },
184 { 0x4c, REG_HDMI_8960_PHY_PLL_SDM_CFG2 },
185 { 0xc0, REG_HDMI_8960_PHY_PLL_SDM_CFG3 },
186 { 0x00, REG_HDMI_8960_PHY_PLL_SDM_CFG4 },
187 { 0x9a, REG_HDMI_8960_PHY_PLL_SSC_CFG0 },
188 { 0x00, REG_HDMI_8960_PHY_PLL_SSC_CFG1 },
189 { 0x00, REG_HDMI_8960_PHY_PLL_SSC_CFG2 },
190 { 0x00, REG_HDMI_8960_PHY_PLL_SSC_CFG3 },
191 { 0x10, REG_HDMI_8960_PHY_PLL_LOCKDET_CFG0 },
192 { 0x1a, REG_HDMI_8960_PHY_PLL_LOCKDET_CFG1 },
193 { 0x0d, REG_HDMI_8960_PHY_PLL_LOCKDET_CFG2 },
194 { 0x2a, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG0 },
195 { 0x03, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG1 },
196 { 0x3b, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG2 },
197 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG3 },
198 { 0x86, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG4 },
199 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG5 },
200 { 0x33, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG6 },
201 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG7 },
202 }
203 },
204
205 { 25200000, 27, {
206 { 0x32, REG_HDMI_8960_PHY_PLL_REFCLK_CFG },
207 { 0x02, REG_HDMI_8960_PHY_PLL_CHRG_PUMP_CFG },
208 { 0x01, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG0 },
209 { 0x33, REG_HDMI_8960_PHY_PLL_LOOP_FLT_CFG1 },
210 { 0x2c, REG_HDMI_8960_PHY_PLL_IDAC_ADJ_CFG },
211 { 0x06, REG_HDMI_8960_PHY_PLL_I_VI_KVCO_CFG },
212 { 0x0a, REG_HDMI_8960_PHY_PLL_PWRDN_B },
213 { 0x77, REG_HDMI_8960_PHY_PLL_SDM_CFG0 },
214 { 0x4c, REG_HDMI_8960_PHY_PLL_SDM_CFG1 },
215 { 0x00, REG_HDMI_8960_PHY_PLL_SDM_CFG2 },
216 { 0xc0, REG_HDMI_8960_PHY_PLL_SDM_CFG3 },
217 { 0x00, REG_HDMI_8960_PHY_PLL_SDM_CFG4 },
218 { 0x9a, REG_HDMI_8960_PHY_PLL_SSC_CFG0 },
219 { 0x00, REG_HDMI_8960_PHY_PLL_SSC_CFG1 },
220 { 0x00, REG_HDMI_8960_PHY_PLL_SSC_CFG2 },
221 { 0x20, REG_HDMI_8960_PHY_PLL_SSC_CFG3 },
222 { 0x10, REG_HDMI_8960_PHY_PLL_LOCKDET_CFG0 },
223 { 0x1a, REG_HDMI_8960_PHY_PLL_LOCKDET_CFG1 },
224 { 0x0d, REG_HDMI_8960_PHY_PLL_LOCKDET_CFG2 },
225 { 0xf4, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG0 },
226 { 0x02, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG1 },
227 { 0x3b, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG2 },
228 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG3 },
229 { 0x86, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG4 },
230 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG5 },
231 { 0x33, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG6 },
232 { 0x00, REG_HDMI_8960_PHY_PLL_VCOCAL_CFG7 },
233 }
234 },
235 };
236
237 static inline void pll_write(struct hdmi_pll_8960 *pll, u32 reg, u32 data)
238 {
239 msm_writel(data, pll->mmio + reg);
240 }
241
242 static inline u32 pll_read(struct hdmi_pll_8960 *pll, u32 reg)
243 {
244 return msm_readl(pll->mmio + reg);
245 }
246
247 static inline struct hdmi_phy *pll_get_phy(struct hdmi_pll_8960 *pll)
248 {
249 return platform_get_drvdata(pll->pdev);
250 }
251
252 static int hdmi_pll_enable(struct clk_hw *hw)
253 {
254 struct hdmi_pll_8960 *pll = hw_clk_to_pll(hw);
255 struct hdmi_phy *phy = pll_get_phy(pll);
256 int timeout_count, pll_lock_retry = 10;
257 unsigned int val;
258
259 DBG("");
260
261
262 pll_write(pll, REG_HDMI_8960_PHY_PLL_LOCKDET_CFG2, 0x8d);
263 pll_write(pll, REG_HDMI_8960_PHY_PLL_LOCKDET_CFG0, 0x10);
264 pll_write(pll, REG_HDMI_8960_PHY_PLL_LOCKDET_CFG1, 0x1a);
265
266
267
268
269
270
271 udelay(10);
272
273
274 pll_write(pll, REG_HDMI_8960_PHY_PLL_LOCKDET_CFG2, 0x0d);
275
276 val = hdmi_phy_read(phy, REG_HDMI_8960_PHY_REG12);
277 val |= HDMI_8960_PHY_REG12_SW_RESET;
278
279 hdmi_phy_write(phy, REG_HDMI_8960_PHY_REG12, val);
280 val &= ~HDMI_8960_PHY_REG12_SW_RESET;
281
282
283
284
285
286 udelay(10);
287
288 hdmi_phy_write(phy, REG_HDMI_8960_PHY_REG12, val);
289 hdmi_phy_write(phy, REG_HDMI_8960_PHY_REG2, 0x3f);
290
291 val = hdmi_phy_read(phy, REG_HDMI_8960_PHY_REG12);
292 val |= HDMI_8960_PHY_REG12_PWRDN_B;
293 hdmi_phy_write(phy, REG_HDMI_8960_PHY_REG12, val);
294
295 mb();
296 udelay(10);
297
298 val = pll_read(pll, REG_HDMI_8960_PHY_PLL_PWRDN_B);
299 val |= HDMI_8960_PHY_PLL_PWRDN_B_PLL_PWRDN_B;
300 val &= ~HDMI_8960_PHY_PLL_PWRDN_B_PD_PLL;
301 pll_write(pll, REG_HDMI_8960_PHY_PLL_PWRDN_B, val);
302 hdmi_phy_write(phy, REG_HDMI_8960_PHY_REG2, 0x80);
303
304 timeout_count = 1000;
305 while (--pll_lock_retry > 0) {
306
307 val = pll_read(pll, REG_HDMI_8960_PHY_PLL_STATUS0);
308 if (val & HDMI_8960_PHY_PLL_STATUS0_PLL_LOCK)
309 break;
310
311 udelay(1);
312
313 if (--timeout_count > 0)
314 continue;
315
316
317
318
319
320
321 pll_write(pll, REG_HDMI_8960_PHY_PLL_LOCKDET_CFG2, 0x8d);
322 udelay(10);
323 pll_write(pll, REG_HDMI_8960_PHY_PLL_LOCKDET_CFG2, 0x0d);
324
325
326
327
328
329 udelay(350);
330
331 timeout_count = 1000;
332 }
333
334 return 0;
335 }
336
337 static void hdmi_pll_disable(struct clk_hw *hw)
338 {
339 struct hdmi_pll_8960 *pll = hw_clk_to_pll(hw);
340 struct hdmi_phy *phy = pll_get_phy(pll);
341 unsigned int val;
342
343 DBG("");
344
345 val = hdmi_phy_read(phy, REG_HDMI_8960_PHY_REG12);
346 val &= ~HDMI_8960_PHY_REG12_PWRDN_B;
347 hdmi_phy_write(phy, REG_HDMI_8960_PHY_REG12, val);
348
349 val = pll_read(pll, REG_HDMI_8960_PHY_PLL_PWRDN_B);
350 val |= HDMI_8960_PHY_REG12_SW_RESET;
351 val &= ~HDMI_8960_PHY_REG12_PWRDN_B;
352 pll_write(pll, REG_HDMI_8960_PHY_PLL_PWRDN_B, val);
353
354 mb();
355 }
356
357 static const struct pll_rate *find_rate(unsigned long rate)
358 {
359 int i;
360
361 for (i = 1; i < ARRAY_SIZE(freqtbl); i++)
362 if (rate > freqtbl[i].rate)
363 return &freqtbl[i - 1];
364
365 return &freqtbl[i - 1];
366 }
367
368 static unsigned long hdmi_pll_recalc_rate(struct clk_hw *hw,
369 unsigned long parent_rate)
370 {
371 struct hdmi_pll_8960 *pll = hw_clk_to_pll(hw);
372
373 return pll->pixclk;
374 }
375
376 static long hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate,
377 unsigned long *parent_rate)
378 {
379 const struct pll_rate *pll_rate = find_rate(rate);
380
381 return pll_rate->rate;
382 }
383
384 static int hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate,
385 unsigned long parent_rate)
386 {
387 struct hdmi_pll_8960 *pll = hw_clk_to_pll(hw);
388 const struct pll_rate *pll_rate = find_rate(rate);
389 int i;
390
391 DBG("rate=%lu", rate);
392
393 for (i = 0; i < pll_rate->num_reg; i++)
394 pll_write(pll, pll_rate->conf[i].reg, pll_rate->conf[i].val);
395
396 pll->pixclk = rate;
397
398 return 0;
399 }
400
401 static const struct clk_ops hdmi_pll_ops = {
402 .enable = hdmi_pll_enable,
403 .disable = hdmi_pll_disable,
404 .recalc_rate = hdmi_pll_recalc_rate,
405 .round_rate = hdmi_pll_round_rate,
406 .set_rate = hdmi_pll_set_rate,
407 };
408
409 static const char * const hdmi_pll_parents[] = {
410 "pxo",
411 };
412
413 static struct clk_init_data pll_init = {
414 .name = "hdmi_pll",
415 .ops = &hdmi_pll_ops,
416 .parent_names = hdmi_pll_parents,
417 .num_parents = ARRAY_SIZE(hdmi_pll_parents),
418 .flags = CLK_IGNORE_UNUSED,
419 };
420
421 int msm_hdmi_pll_8960_init(struct platform_device *pdev)
422 {
423 struct device *dev = &pdev->dev;
424 struct hdmi_pll_8960 *pll;
425 struct clk *clk;
426 int i;
427
428
429 for (i = 0; i < (ARRAY_SIZE(freqtbl) - 1); i++)
430 if (WARN_ON(freqtbl[i].rate < freqtbl[i + 1].rate))
431 return -EINVAL;
432
433 pll = devm_kzalloc(dev, sizeof(*pll), GFP_KERNEL);
434 if (!pll)
435 return -ENOMEM;
436
437 pll->mmio = msm_ioremap(pdev, "hdmi_pll", "HDMI_PLL");
438 if (IS_ERR(pll->mmio)) {
439 DRM_DEV_ERROR(dev, "failed to map pll base\n");
440 return -ENOMEM;
441 }
442
443 pll->pdev = pdev;
444 pll->clk_hw.init = &pll_init;
445
446 clk = devm_clk_register(dev, &pll->clk_hw);
447 if (IS_ERR(clk)) {
448 DRM_DEV_ERROR(dev, "failed to register pll clock\n");
449 return -EINVAL;
450 }
451
452 return 0;
453 }