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9#include <linux/device.h>
10#include <linux/platform_device.h>
11#include <linux/list.h>
12#include <linux/of.h>
13#include <linux/gfp.h>
14#include <linux/export.h>
15
16#include "jedec_ddr.h"
17#include "of_memory.h"
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28
29const struct lpddr2_min_tck *of_get_min_tck(struct device_node *np,
30 struct device *dev)
31{
32 int ret = 0;
33 struct lpddr2_min_tck *min;
34
35 min = devm_kzalloc(dev, sizeof(*min), GFP_KERNEL);
36 if (!min)
37 goto default_min_tck;
38
39 ret |= of_property_read_u32(np, "tRPab-min-tck", &min->tRPab);
40 ret |= of_property_read_u32(np, "tRCD-min-tck", &min->tRCD);
41 ret |= of_property_read_u32(np, "tWR-min-tck", &min->tWR);
42 ret |= of_property_read_u32(np, "tRASmin-min-tck", &min->tRASmin);
43 ret |= of_property_read_u32(np, "tRRD-min-tck", &min->tRRD);
44 ret |= of_property_read_u32(np, "tWTR-min-tck", &min->tWTR);
45 ret |= of_property_read_u32(np, "tXP-min-tck", &min->tXP);
46 ret |= of_property_read_u32(np, "tRTP-min-tck", &min->tRTP);
47 ret |= of_property_read_u32(np, "tCKE-min-tck", &min->tCKE);
48 ret |= of_property_read_u32(np, "tCKESR-min-tck", &min->tCKESR);
49 ret |= of_property_read_u32(np, "tFAW-min-tck", &min->tFAW);
50
51 if (ret) {
52 devm_kfree(dev, min);
53 goto default_min_tck;
54 }
55
56 return min;
57
58default_min_tck:
59 dev_warn(dev, "%s: using default min-tck values\n", __func__);
60 return &lpddr2_jedec_min_tck;
61}
62EXPORT_SYMBOL(of_get_min_tck);
63
64static int of_do_get_timings(struct device_node *np,
65 struct lpddr2_timings *tim)
66{
67 int ret;
68
69 ret = of_property_read_u32(np, "max-freq", &tim->max_freq);
70 ret |= of_property_read_u32(np, "min-freq", &tim->min_freq);
71 ret |= of_property_read_u32(np, "tRPab", &tim->tRPab);
72 ret |= of_property_read_u32(np, "tRCD", &tim->tRCD);
73 ret |= of_property_read_u32(np, "tWR", &tim->tWR);
74 ret |= of_property_read_u32(np, "tRAS-min", &tim->tRAS_min);
75 ret |= of_property_read_u32(np, "tRRD", &tim->tRRD);
76 ret |= of_property_read_u32(np, "tWTR", &tim->tWTR);
77 ret |= of_property_read_u32(np, "tXP", &tim->tXP);
78 ret |= of_property_read_u32(np, "tRTP", &tim->tRTP);
79 ret |= of_property_read_u32(np, "tCKESR", &tim->tCKESR);
80 ret |= of_property_read_u32(np, "tDQSCK-max", &tim->tDQSCK_max);
81 ret |= of_property_read_u32(np, "tFAW", &tim->tFAW);
82 ret |= of_property_read_u32(np, "tZQCS", &tim->tZQCS);
83 ret |= of_property_read_u32(np, "tZQCL", &tim->tZQCL);
84 ret |= of_property_read_u32(np, "tZQinit", &tim->tZQinit);
85 ret |= of_property_read_u32(np, "tRAS-max-ns", &tim->tRAS_max_ns);
86 ret |= of_property_read_u32(np, "tDQSCK-max-derated",
87 &tim->tDQSCK_max_derated);
88
89 return ret;
90}
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105const struct lpddr2_timings *of_get_ddr_timings(struct device_node *np_ddr,
106 struct device *dev, u32 device_type, u32 *nr_frequencies)
107{
108 struct lpddr2_timings *timings = NULL;
109 u32 arr_sz = 0, i = 0;
110 struct device_node *np_tim;
111 char *tim_compat = NULL;
112
113 switch (device_type) {
114 case DDR_TYPE_LPDDR2_S2:
115 case DDR_TYPE_LPDDR2_S4:
116 tim_compat = "jedec,lpddr2-timings";
117 break;
118 default:
119 dev_warn(dev, "%s: un-supported memory type\n", __func__);
120 }
121
122 for_each_child_of_node(np_ddr, np_tim)
123 if (of_device_is_compatible(np_tim, tim_compat))
124 arr_sz++;
125
126 if (arr_sz)
127 timings = devm_kcalloc(dev, arr_sz, sizeof(*timings),
128 GFP_KERNEL);
129
130 if (!timings)
131 goto default_timings;
132
133 for_each_child_of_node(np_ddr, np_tim) {
134 if (of_device_is_compatible(np_tim, tim_compat)) {
135 if (of_do_get_timings(np_tim, &timings[i])) {
136 devm_kfree(dev, timings);
137 goto default_timings;
138 }
139 i++;
140 }
141 }
142
143 *nr_frequencies = arr_sz;
144
145 return timings;
146
147default_timings:
148 dev_warn(dev, "%s: using default timings\n", __func__);
149 *nr_frequencies = ARRAY_SIZE(lpddr2_jedec_timings);
150 return lpddr2_jedec_timings;
151}
152EXPORT_SYMBOL(of_get_ddr_timings);
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162
163const struct lpddr3_min_tck *of_lpddr3_get_min_tck(struct device_node *np,
164 struct device *dev)
165{
166 int ret = 0;
167 struct lpddr3_min_tck *min;
168
169 min = devm_kzalloc(dev, sizeof(*min), GFP_KERNEL);
170 if (!min)
171 goto default_min_tck;
172
173 ret |= of_property_read_u32(np, "tRFC-min-tck", &min->tRFC);
174 ret |= of_property_read_u32(np, "tRRD-min-tck", &min->tRRD);
175 ret |= of_property_read_u32(np, "tRPab-min-tck", &min->tRPab);
176 ret |= of_property_read_u32(np, "tRPpb-min-tck", &min->tRPpb);
177 ret |= of_property_read_u32(np, "tRCD-min-tck", &min->tRCD);
178 ret |= of_property_read_u32(np, "tRC-min-tck", &min->tRC);
179 ret |= of_property_read_u32(np, "tRAS-min-tck", &min->tRAS);
180 ret |= of_property_read_u32(np, "tWTR-min-tck", &min->tWTR);
181 ret |= of_property_read_u32(np, "tWR-min-tck", &min->tWR);
182 ret |= of_property_read_u32(np, "tRTP-min-tck", &min->tRTP);
183 ret |= of_property_read_u32(np, "tW2W-C2C-min-tck", &min->tW2W_C2C);
184 ret |= of_property_read_u32(np, "tR2R-C2C-min-tck", &min->tR2R_C2C);
185 ret |= of_property_read_u32(np, "tWL-min-tck", &min->tWL);
186 ret |= of_property_read_u32(np, "tDQSCK-min-tck", &min->tDQSCK);
187 ret |= of_property_read_u32(np, "tRL-min-tck", &min->tRL);
188 ret |= of_property_read_u32(np, "tFAW-min-tck", &min->tFAW);
189 ret |= of_property_read_u32(np, "tXSR-min-tck", &min->tXSR);
190 ret |= of_property_read_u32(np, "tXP-min-tck", &min->tXP);
191 ret |= of_property_read_u32(np, "tCKE-min-tck", &min->tCKE);
192 ret |= of_property_read_u32(np, "tCKESR-min-tck", &min->tCKESR);
193 ret |= of_property_read_u32(np, "tMRD-min-tck", &min->tMRD);
194
195 if (ret) {
196 dev_warn(dev, "%s: errors while parsing min-tck values\n",
197 __func__);
198 devm_kfree(dev, min);
199 goto default_min_tck;
200 }
201
202 return min;
203
204default_min_tck:
205 dev_warn(dev, "%s: using default min-tck values\n", __func__);
206 return NULL;
207}
208EXPORT_SYMBOL(of_lpddr3_get_min_tck);
209
210static int of_lpddr3_do_get_timings(struct device_node *np,
211 struct lpddr3_timings *tim)
212{
213 int ret;
214
215
216 ret = of_property_read_u32(np, "reg", &tim->max_freq);
217 ret |= of_property_read_u32(np, "min-freq", &tim->min_freq);
218 ret |= of_property_read_u32(np, "tRFC", &tim->tRFC);
219 ret |= of_property_read_u32(np, "tRRD", &tim->tRRD);
220 ret |= of_property_read_u32(np, "tRPab", &tim->tRPab);
221 ret |= of_property_read_u32(np, "tRPpb", &tim->tRPpb);
222 ret |= of_property_read_u32(np, "tRCD", &tim->tRCD);
223 ret |= of_property_read_u32(np, "tRC", &tim->tRC);
224 ret |= of_property_read_u32(np, "tRAS", &tim->tRAS);
225 ret |= of_property_read_u32(np, "tWTR", &tim->tWTR);
226 ret |= of_property_read_u32(np, "tWR", &tim->tWR);
227 ret |= of_property_read_u32(np, "tRTP", &tim->tRTP);
228 ret |= of_property_read_u32(np, "tW2W-C2C", &tim->tW2W_C2C);
229 ret |= of_property_read_u32(np, "tR2R-C2C", &tim->tR2R_C2C);
230 ret |= of_property_read_u32(np, "tFAW", &tim->tFAW);
231 ret |= of_property_read_u32(np, "tXSR", &tim->tXSR);
232 ret |= of_property_read_u32(np, "tXP", &tim->tXP);
233 ret |= of_property_read_u32(np, "tCKE", &tim->tCKE);
234 ret |= of_property_read_u32(np, "tCKESR", &tim->tCKESR);
235 ret |= of_property_read_u32(np, "tMRD", &tim->tMRD);
236
237 return ret;
238}
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253const struct lpddr3_timings
254*of_lpddr3_get_ddr_timings(struct device_node *np_ddr, struct device *dev,
255 u32 device_type, u32 *nr_frequencies)
256{
257 struct lpddr3_timings *timings = NULL;
258 u32 arr_sz = 0, i = 0;
259 struct device_node *np_tim;
260 char *tim_compat = NULL;
261
262 switch (device_type) {
263 case DDR_TYPE_LPDDR3:
264 tim_compat = "jedec,lpddr3-timings";
265 break;
266 default:
267 dev_warn(dev, "%s: un-supported memory type\n", __func__);
268 }
269
270 for_each_child_of_node(np_ddr, np_tim)
271 if (of_device_is_compatible(np_tim, tim_compat))
272 arr_sz++;
273
274 if (arr_sz)
275 timings = devm_kcalloc(dev, arr_sz, sizeof(*timings),
276 GFP_KERNEL);
277
278 if (!timings)
279 goto default_timings;
280
281 for_each_child_of_node(np_ddr, np_tim) {
282 if (of_device_is_compatible(np_tim, tim_compat)) {
283 if (of_lpddr3_do_get_timings(np_tim, &timings[i])) {
284 devm_kfree(dev, timings);
285 goto default_timings;
286 }
287 i++;
288 }
289 }
290
291 *nr_frequencies = arr_sz;
292
293 return timings;
294
295default_timings:
296 dev_warn(dev, "%s: failed to get timings\n", __func__);
297 *nr_frequencies = 0;
298 return NULL;
299}
300EXPORT_SYMBOL(of_lpddr3_get_ddr_timings);
301