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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* OMAP3/OMAP4 smartreflex device file
*
* Author: Thara Gopinath <thara@ti.com>
*
* Based originally on code from smartreflex.c
* Copyright (C) 2010 Texas Instruments, Inc.
* Thara Gopinath <thara@ti.com>
*
* Copyright (C) 2008 Nokia Corporation
* Kalle Jokiniemi
*
* Copyright (C) 2007 Texas Instruments, Inc.
* Lesly A M <x0080970@ti.com>
*/
#include <linux/power/smartreflex.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/io.h>
#include "soc.h"
#include "omap_device.h"
#include "voltage.h"
#include "control.h"
#include "pm.h"
static bool sr_enable_on_init;
/* Read EFUSE values from control registers for OMAP3430 */
static void __init sr_set_nvalues(struct omap_volt_data *volt_data,
struct omap_sr_data *sr_data)
{
struct omap_sr_nvalue_table *nvalue_table;
int i, j, count = 0;
sr_data->nvalue_count = 0;
sr_data->nvalue_table = NULL;
while (volt_data[count].volt_nominal)
count++;
nvalue_table = kcalloc(count, sizeof(*nvalue_table), GFP_KERNEL);
if (!nvalue_table)
return;
for (i = 0, j = 0; i < count; i++) {
u32 v;
/*
* In OMAP4 the efuse registers are 24 bit aligned.
* A readl_relaxed will fail for non-32 bit aligned address
* and hence the 8-bit read and shift.
*/
if (cpu_is_omap44xx()) {
u16 offset = volt_data[i].sr_efuse_offs;
v = omap_ctrl_readb(offset) |
omap_ctrl_readb(offset + 1) << 8 |
omap_ctrl_readb(offset + 2) << 16;
} else {
v = omap_ctrl_readl(volt_data[i].sr_efuse_offs);
}
/*
* Many OMAP SoCs don't have the eFuse values set.
* For example, pretty much all OMAP3xxx before
* ES3.something.
*
* XXX There needs to be some way for board files or
* userspace to add these in.
*/
if (v == 0)
continue;
nvalue_table[j].nvalue = v;
nvalue_table[j].efuse_offs = volt_data[i].sr_efuse_offs;
nvalue_table[j].errminlimit = volt_data[i].sr_errminlimit;
nvalue_table[j].volt_nominal = volt_data[i].volt_nominal;
j++;
}
sr_data->nvalue_table = nvalue_table;
sr_data->nvalue_count = j;
}
extern struct omap_sr_data omap_sr_pdata[];
static int __init sr_init_by_name(const char *name, const char *voltdm)
{
struct omap_sr_data *sr_data = NULL;
struct omap_volt_data *volt_data;
static int i;
if (!strncmp(name, "smartreflex_mpu_iva", 20) ||
!strncmp(name, "smartreflex_mpu", 16))
sr_data = &omap_sr_pdata[OMAP_SR_MPU];
else if (!strncmp(name, "smartreflex_core", 17))
sr_data = &omap_sr_pdata[OMAP_SR_CORE];
else if (!strncmp(name, "smartreflex_iva", 16))
sr_data = &omap_sr_pdata[OMAP_SR_IVA];
if (!sr_data) {
pr_err("%s: Unknown instance %s\n", __func__, name);
return -EINVAL;
}
sr_data->name = name;
if (cpu_is_omap343x())
sr_data->ip_type = 1;
else
sr_data->ip_type = 2;
sr_data->senn_mod = 0x1;
sr_data->senp_mod = 0x1;
if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
sr_data->err_weight = OMAP3430_SR_ERRWEIGHT;
sr_data->err_maxlimit = OMAP3430_SR_ERRMAXLIMIT;
sr_data->accum_data = OMAP3430_SR_ACCUMDATA;
if (!(strcmp(sr_data->name, "smartreflex_mpu"))) {
sr_data->senn_avgweight = OMAP3430_SR1_SENNAVGWEIGHT;
sr_data->senp_avgweight = OMAP3430_SR1_SENPAVGWEIGHT;
} else {
sr_data->senn_avgweight = OMAP3430_SR2_SENNAVGWEIGHT;
sr_data->senp_avgweight = OMAP3430_SR2_SENPAVGWEIGHT;
}
}
sr_data->voltdm = voltdm_lookup(voltdm);
if (!sr_data->voltdm) {
pr_err("%s: Unable to get voltage domain pointer for VDD %s\n",
__func__, voltdm);
goto exit;
}
omap_voltage_get_volttable(sr_data->voltdm, &volt_data);
if (!volt_data) {
pr_err("%s: No Voltage table registered for VDD%d\n",
__func__, i + 1);
goto exit;
}
sr_set_nvalues(volt_data, sr_data);
sr_data->enable_on_init = sr_enable_on_init;
exit:
i++;
return 0;
}
static int __init sr_dev_init(struct omap_hwmod *oh, void *user)
{
struct omap_smartreflex_dev_attr *sr_dev_attr;
sr_dev_attr = (struct omap_smartreflex_dev_attr *)oh->dev_attr;
if (!sr_dev_attr || !sr_dev_attr->sensor_voltdm_name) {
pr_err("%s: No voltage domain specified for %s. Cannot initialize\n",
__func__, oh->name);
return 0;
}
return sr_init_by_name(oh->name, sr_dev_attr->sensor_voltdm_name);
}
/*
* API to be called from board files to enable smartreflex
* autocompensation at init.
*/
void __init omap_enable_smartreflex_on_init(void)
{
sr_enable_on_init = true;
}
static const char * const omap4_sr_instances[] = {
"mpu",
"iva",
"core",
};
static const char * const dra7_sr_instances[] = {
"mpu",
"core",
};
int __init omap_devinit_smartreflex(void)
{
const char * const *sr_inst;
int i, nr_sr = 0;
if (soc_is_omap44xx()) {
sr_inst = omap4_sr_instances;
nr_sr = ARRAY_SIZE(omap4_sr_instances);
} else if (soc_is_dra7xx()) {
sr_inst = dra7_sr_instances;
nr_sr = ARRAY_SIZE(dra7_sr_instances);
}
if (nr_sr) {
const char *name, *voltdm;
for (i = 0; i < nr_sr; i++) {
name = kasprintf(GFP_KERNEL, "smartreflex_%s", sr_inst[i]);
voltdm = sr_inst[i];
sr_init_by_name(name, voltdm);
}
return 0;
}
return omap_hwmod_for_each_by_class("smartreflex", sr_dev_init, NULL);
}
|
