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
217
218
219
220
221
222
|
From 8a2d04c222684e3278dd28d11f57a05fe0865183 Mon Sep 17 00:00:00 2001
From: Andy Green <andy@openmoko.com>
Date: Wed, 2 Jul 2008 22:40:12 +0100
Subject: [PATCH] fix-pcf50633-use-i2c-bulk-autoincrement.patch
Simplify and speed up bulk sequential I2C actions in pcf50633
the time savings are pretty considerable and so is the simplification
Signed-off-by: Andy Green <andy@openmoko.com>
---
drivers/i2c/chips/pcf50633.c | 117 +++++++++++++++++++++++++-----------------
1 files changed, 70 insertions(+), 47 deletions(-)
diff --git a/drivers/i2c/chips/pcf50633.c b/drivers/i2c/chips/pcf50633.c
index 1f88c32..96857a3 100644
--- a/drivers/i2c/chips/pcf50633.c
+++ b/drivers/i2c/chips/pcf50633.c
@@ -156,14 +156,14 @@ struct pcf50633_data {
#ifdef CONFIG_PM
struct {
- u_int8_t int1m, int2m, int3m, int4m, int5m;
u_int8_t ooctim2;
- u_int8_t autoout, autoena, automxc;
- u_int8_t down1out, down1mxc;
- u_int8_t down2out, down2ena;
- u_int8_t memldoout, memldoena;
- u_int8_t ledout, ledena, leddim;
- u_int8_t ldo[__NUM_PCF50633_REGS][2];
+ /* enables are always [1] below
+ * I2C has limit of 32 sequential regs, so done in two lumps
+ * because it covers 33 register extent otherwise
+ */
+ u_int8_t misc[PCF50633_REG_LEDDIM - PCF50633_REG_AUTOOUT + 1];
+ /* skip 1 reserved reg here */
+ u_int8_t ldo[PCF50633_REG_HCLDOENA - PCF50633_REG_LDO1OUT + 1];
} standby_regs;
struct resume_dependency resume_dependency;
@@ -1737,6 +1737,8 @@ static int pcf50633bl_set_intensity(struct backlight_device *bd)
int old_intensity = reg_read(pcf, PCF50633_REG_LEDOUT);
int ret;
+ dev_info(&pcf->client.dev, "pcf50633bl_set_intensity\n");
+
if (!(reg_read(pcf, PCF50633_REG_LEDENA) & 1))
old_intensity = 0;
@@ -2221,6 +2223,9 @@ static int pcf50633_suspend(struct device *dev, pm_message_t state)
int i;
int ret;
u_int8_t tmp;
+ u_int8_t res[5];
+
+ dev_err(dev, "pcf50633_suspend\n");
/* we suspend once (!) as late as possible in the suspend sequencing */
@@ -2228,30 +2233,26 @@ static int pcf50633_suspend(struct device *dev, pm_message_t state)
return 0;
/* The general idea is to power down all unused power supplies,
- * and then mask all PCF50606 interrup sources but EXTONR, ONKEYF
+ * and then mask all PCF50633 interrupt sources but EXTONR, ONKEYF
* and ALARM */
mutex_lock(&pcf->lock);
/* Save all registers that don't "survive" standby state */
pcf->standby_regs.ooctim2 = __reg_read(pcf, PCF50633_REG_OOCTIM2);
- pcf->standby_regs.autoout = __reg_read(pcf, PCF50633_REG_AUTOOUT);
- pcf->standby_regs.autoena = __reg_read(pcf, PCF50633_REG_AUTOENA);
- pcf->standby_regs.automxc = __reg_read(pcf, PCF50633_REG_AUTOMXC);
- pcf->standby_regs.down1out = __reg_read(pcf, PCF50633_REG_DOWN1OUT);
- pcf->standby_regs.down1mxc = __reg_read(pcf, PCF50633_REG_DOWN1MXC);
- pcf->standby_regs.down2out = __reg_read(pcf, PCF50633_REG_DOWN2OUT);
- pcf->standby_regs.down2ena = __reg_read(pcf, PCF50633_REG_DOWN2ENA);
- pcf->standby_regs.memldoout = __reg_read(pcf, PCF50633_REG_MEMLDOOUT);
- pcf->standby_regs.memldoena = __reg_read(pcf, PCF50633_REG_MEMLDOENA);
- pcf->standby_regs.ledout = __reg_read(pcf, PCF50633_REG_LEDOUT);
- pcf->standby_regs.ledena = __reg_read(pcf, PCF50633_REG_LEDENA);
- pcf->standby_regs.leddim = __reg_read(pcf, PCF50633_REG_LEDDIM);
+
+ ret = i2c_smbus_read_i2c_block_data(&pcf->client,
+ PCF50633_REG_AUTOOUT,
+ sizeof(pcf->standby_regs.misc),
+ &pcf->standby_regs.misc[0]);
+ if (ret != 18)
+ dev_err(dev, "Failed to save misc levels and enables :-(\n");
/* regulator voltages and enable states */
ret = i2c_smbus_read_i2c_block_data(&pcf->client,
- PCF50633_REG_LDO1OUT, 14,
- &pcf->standby_regs.ldo[0][0]);
+ PCF50633_REG_LDO1OUT,
+ sizeof(pcf->standby_regs.ldo),
+ &pcf->standby_regs.ldo[0]);
if (ret != 14)
dev_err(dev, "Failed to save LDO levels and enables :-(\n");
@@ -2261,11 +2262,16 @@ static int pcf50633_suspend(struct device *dev, pm_message_t state)
continue;
dev_dbg(dev, "disabling regulator %u\n", i);
- /* we cannot use pcf50633_onoff_set() because we're
- * already under the mutex */
- tmp = __reg_read(pcf, regulator_registers[i]+1);
- tmp &= 0xfe;
- __reg_write(pcf, regulator_registers[i]+1, tmp);
+
+ /* we can save ourselves the read part of a read-modify-write
+ * here because we captured all these already
+ */
+ if (i < 4)
+ tmp = pcf->standby_regs.misc[i * 4 + 1];
+ else
+ tmp = pcf->standby_regs.ldo[(i - 4) * 2 + 1];
+
+ __reg_write(pcf, regulator_registers[i] + 1, tmp & 0xfe);
}
/* turn off the backlight */
@@ -2276,11 +2282,14 @@ static int pcf50633_suspend(struct device *dev, pm_message_t state)
/* set interrupt masks so only those sources we want to wake
* us are able to
*/
- __reg_write(pcf, PCF50633_REG_INT1M, ~pcf->pdata->resumers[0]);
- __reg_write(pcf, PCF50633_REG_INT2M, ~pcf->pdata->resumers[1]);
- __reg_write(pcf, PCF50633_REG_INT3M, ~pcf->pdata->resumers[2]);
- __reg_write(pcf, PCF50633_REG_INT4M, ~pcf->pdata->resumers[3]);
- __reg_write(pcf, PCF50633_REG_INT5M, ~pcf->pdata->resumers[4]);
+ for (i = 0; i < 5; i++)
+ res[i] = ~pcf->pdata->resumers[i];
+
+ ret = i2c_smbus_write_i2c_block_data(&pcf->client,
+ PCF50633_REG_INT1M,
+ 5, &res[0]);
+ if (ret)
+ dev_err(dev, "Failed to set wake masks :-( %d\n", ret);
pcf->have_been_suspended = 1;
@@ -2312,9 +2321,12 @@ EXPORT_SYMBOL_GPL(pcf50633_ready);
void pcf50633_backlight_resume(struct pcf50633_data *pcf)
{
/* we force the backlight on in fact */
- __reg_write(pcf, PCF50633_REG_LEDOUT, pcf->standby_regs.ledout);
- __reg_write(pcf, PCF50633_REG_LEDENA, pcf->standby_regs.ledena | 0x01);
- __reg_write(pcf, PCF50633_REG_LEDDIM, pcf->standby_regs.leddim);
+ __reg_write(pcf, PCF50633_REG_LEDOUT, pcf->standby_regs.misc[
+ PCF50633_REG_LEDOUT - PCF50633_REG_AUTOOUT]);
+ __reg_write(pcf, PCF50633_REG_LEDENA, pcf->standby_regs.misc[
+ PCF50633_REG_LEDENA - PCF50633_REG_AUTOOUT] | 1);
+ __reg_write(pcf, PCF50633_REG_LEDDIM, pcf->standby_regs.misc[
+ PCF50633_REG_LEDDIM - PCF50633_REG_AUTOOUT]);
}
EXPORT_SYMBOL_GPL(pcf50633_backlight_resume);
@@ -2324,7 +2336,10 @@ static int pcf50633_resume(struct device *dev)
struct i2c_client *client = to_i2c_client(dev);
struct pcf50633_data *pcf = i2c_get_clientdata(client);
int ret;
+ u8 res[5];
+ dev_info(dev, "pcf50633_resume suspended on entry = %d\n",
+ pcf->have_been_suspended);
mutex_lock(&pcf->lock);
pcf->have_been_suspended = 2; /* resuming */
@@ -2332,14 +2347,14 @@ static int pcf50633_resume(struct device *dev)
/* these guys get reset while pcf50633 is suspend state, refresh */
__reg_write(pcf, PCF50633_REG_OOCTIM2, pcf->standby_regs.ooctim2);
- __reg_write(pcf, PCF50633_REG_AUTOOUT, pcf->standby_regs.autoout);
- __reg_write(pcf, PCF50633_REG_AUTOMXC, pcf->standby_regs.automxc);
- __reg_write(pcf, PCF50633_REG_DOWN1OUT, pcf->standby_regs.down1out);
- __reg_write(pcf, PCF50633_REG_DOWN1MXC, pcf->standby_regs.down1mxc);
- __reg_write(pcf, PCF50633_REG_DOWN2OUT, pcf->standby_regs.down2out);
- __reg_write(pcf, PCF50633_REG_DOWN2ENA, pcf->standby_regs.down2ena);
- __reg_write(pcf, PCF50633_REG_MEMLDOOUT, pcf->standby_regs.memldoout);
- __reg_write(pcf, PCF50633_REG_MEMLDOENA, pcf->standby_regs.memldoena);
+
+ /* regulator voltages and enable states */
+ ret = i2c_smbus_write_i2c_block_data(&pcf->client,
+ PCF50633_REG_AUTOOUT,
+ sizeof(pcf->standby_regs.misc) - 4,
+ &pcf->standby_regs.misc[0]);
+ if (ret)
+ dev_err(dev, "Failed to restore misc :-( %d\n", ret);
/* platform can choose to defer backlight bringup */
if (!pcf->pdata->defer_resume_backlight)
@@ -2347,14 +2362,22 @@ static int pcf50633_resume(struct device *dev)
/* regulator voltages and enable states */
ret = i2c_smbus_write_i2c_block_data(&pcf->client,
- PCF50633_REG_LDO1OUT, 14,
- &pcf->standby_regs.ldo[0][0]);
+ PCF50633_REG_LDO1OUT,
+ sizeof(pcf->standby_regs.ldo),
+ &pcf->standby_regs.ldo[0]);
if (ret)
dev_err(dev, "Failed to restore LDOs :-( %d\n", ret);
- mutex_unlock(&pcf->lock);
+ memset(res, 0, sizeof(res));
+ ret = i2c_smbus_write_i2c_block_data(&pcf->client,
+ PCF50633_REG_INT1M,
+ 5, &res[0]);
+ if (ret)
+ dev_err(dev, "Failed to set int masks :-( %d\n", ret);
- pcf50633_irq(pcf->irq, pcf);
+ pcf->have_been_suspended = 3; /* resume completed */
+
+ mutex_unlock(&pcf->lock);
callback_all_resume_dependencies(&pcf->resume_dependency);
--
1.5.6.5
|
