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-rw-r--r--drivers/mfd/Kconfig9
-rw-r--r--drivers/mfd/Makefile1
-rw-r--r--drivers/mfd/as3711.c217
-rw-r--r--include/linux/mfd/as3711.h126
4 files changed, 353 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index f5b839b718aa..475c26696b95 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1103,6 +1103,15 @@ config MFD_RETU
1103 Retu is a multi-function device found on Nokia Internet Tablets 1103 Retu is a multi-function device found on Nokia Internet Tablets
1104 (770, N800 and N810). 1104 (770, N800 and N810).
1105 1105
1106config MFD_AS3711
1107 bool "Support for AS3711"
1108 select MFD_CORE
1109 select REGMAP_I2C
1110 select REGMAP_IRQ
1111 depends on I2C=y
1112 help
1113 Support for the AS3711 PMIC from AMS
1114
1106endmenu 1115endmenu
1107endif 1116endif
1108 1117
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 2689c8a0d781..f2216dfd963c 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -146,3 +146,4 @@ obj-$(CONFIG_MFD_SEC_CORE) += sec-core.o sec-irq.o
146obj-$(CONFIG_MFD_SYSCON) += syscon.o 146obj-$(CONFIG_MFD_SYSCON) += syscon.o
147obj-$(CONFIG_MFD_LM3533) += lm3533-core.o lm3533-ctrlbank.o 147obj-$(CONFIG_MFD_LM3533) += lm3533-core.o lm3533-ctrlbank.o
148obj-$(CONFIG_MFD_RETU) += retu-mfd.o 148obj-$(CONFIG_MFD_RETU) += retu-mfd.o
149obj-$(CONFIG_MFD_AS3711) += as3711.o
diff --git a/drivers/mfd/as3711.c b/drivers/mfd/as3711.c
new file mode 100644
index 000000000000..e994c9691124
--- /dev/null
+++ b/drivers/mfd/as3711.c
@@ -0,0 +1,217 @@
1/*
2 * AS3711 PMIC MFC driver
3 *
4 * Copyright (C) 2012 Renesas Electronics Corporation
5 * Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the version 2 of the GNU General Public License as
9 * published by the Free Software Foundation
10 */
11
12#include <linux/device.h>
13#include <linux/err.h>
14#include <linux/i2c.h>
15#include <linux/init.h>
16#include <linux/kernel.h>
17#include <linux/mfd/as3711.h>
18#include <linux/mfd/core.h>
19#include <linux/module.h>
20#include <linux/regmap.h>
21#include <linux/slab.h>
22
23enum {
24 AS3711_REGULATOR,
25 AS3711_BACKLIGHT,
26};
27
28/*
29 * Ok to have it static: it is only used during probing and multiple I2C devices
30 * cannot be probed simultaneously. Just make sure to avoid stale data.
31 */
32static struct mfd_cell as3711_subdevs[] = {
33 [AS3711_REGULATOR] = {.name = "as3711-regulator",},
34 [AS3711_BACKLIGHT] = {.name = "as3711-backlight",},
35};
36
37static bool as3711_volatile_reg(struct device *dev, unsigned int reg)
38{
39 switch (reg) {
40 case AS3711_GPIO_SIGNAL_IN:
41 case AS3711_INTERRUPT_STATUS_1:
42 case AS3711_INTERRUPT_STATUS_2:
43 case AS3711_INTERRUPT_STATUS_3:
44 case AS3711_CHARGER_STATUS_1:
45 case AS3711_CHARGER_STATUS_2:
46 case AS3711_REG_STATUS:
47 return true;
48 }
49 return false;
50}
51
52static bool as3711_precious_reg(struct device *dev, unsigned int reg)
53{
54 switch (reg) {
55 case AS3711_INTERRUPT_STATUS_1:
56 case AS3711_INTERRUPT_STATUS_2:
57 case AS3711_INTERRUPT_STATUS_3:
58 return true;
59 }
60 return false;
61}
62
63static bool as3711_readable_reg(struct device *dev, unsigned int reg)
64{
65 switch (reg) {
66 case AS3711_SD_1_VOLTAGE:
67 case AS3711_SD_2_VOLTAGE:
68 case AS3711_SD_3_VOLTAGE:
69 case AS3711_SD_4_VOLTAGE:
70 case AS3711_LDO_1_VOLTAGE:
71 case AS3711_LDO_2_VOLTAGE:
72 case AS3711_LDO_3_VOLTAGE:
73 case AS3711_LDO_4_VOLTAGE:
74 case AS3711_LDO_5_VOLTAGE:
75 case AS3711_LDO_6_VOLTAGE:
76 case AS3711_LDO_7_VOLTAGE:
77 case AS3711_LDO_8_VOLTAGE:
78 case AS3711_SD_CONTROL:
79 case AS3711_GPIO_SIGNAL_OUT:
80 case AS3711_GPIO_SIGNAL_IN:
81 case AS3711_SD_CONTROL_1:
82 case AS3711_SD_CONTROL_2:
83 case AS3711_CURR_CONTROL:
84 case AS3711_CURR1_VALUE:
85 case AS3711_CURR2_VALUE:
86 case AS3711_CURR3_VALUE:
87 case AS3711_STEPUP_CONTROL_1:
88 case AS3711_STEPUP_CONTROL_2:
89 case AS3711_STEPUP_CONTROL_4:
90 case AS3711_STEPUP_CONTROL_5:
91 case AS3711_REG_STATUS:
92 case AS3711_INTERRUPT_STATUS_1:
93 case AS3711_INTERRUPT_STATUS_2:
94 case AS3711_INTERRUPT_STATUS_3:
95 case AS3711_CHARGER_STATUS_1:
96 case AS3711_CHARGER_STATUS_2:
97 case AS3711_ASIC_ID_1:
98 case AS3711_ASIC_ID_2:
99 return true;
100 }
101 return false;
102}
103
104static const struct regmap_config as3711_regmap_config = {
105 .reg_bits = 8,
106 .val_bits = 8,
107 .volatile_reg = as3711_volatile_reg,
108 .readable_reg = as3711_readable_reg,
109 .precious_reg = as3711_precious_reg,
110 .max_register = AS3711_MAX_REGS,
111 .num_reg_defaults_raw = AS3711_MAX_REGS,
112 .cache_type = REGCACHE_RBTREE,
113};
114
115static int as3711_i2c_probe(struct i2c_client *client,
116 const struct i2c_device_id *id)
117{
118 struct as3711 *as3711;
119 struct as3711_platform_data *pdata = client->dev.platform_data;
120 unsigned int id1, id2;
121 int ret;
122
123 if (!pdata)
124 dev_dbg(&client->dev, "Platform data not found\n");
125
126 as3711 = devm_kzalloc(&client->dev, sizeof(struct as3711), GFP_KERNEL);
127 if (!as3711) {
128 dev_err(&client->dev, "Memory allocation failed\n");
129 return -ENOMEM;
130 }
131
132 as3711->dev = &client->dev;
133 i2c_set_clientdata(client, as3711);
134
135 if (client->irq)
136 dev_notice(&client->dev, "IRQ not supported yet\n");
137
138 as3711->regmap = devm_regmap_init_i2c(client, &as3711_regmap_config);
139 if (IS_ERR(as3711->regmap)) {
140 ret = PTR_ERR(as3711->regmap);
141 dev_err(&client->dev, "regmap initialization failed: %d\n", ret);
142 return ret;
143 }
144
145 ret = regmap_read(as3711->regmap, AS3711_ASIC_ID_1, &id1);
146 if (!ret)
147 ret = regmap_read(as3711->regmap, AS3711_ASIC_ID_2, &id2);
148 if (ret < 0) {
149 dev_err(&client->dev, "regmap_read() failed: %d\n", ret);
150 return ret;
151 }
152 if (id1 != 0x8b)
153 return -ENODEV;
154 dev_info(as3711->dev, "AS3711 detected: %x:%x\n", id1, id2);
155
156 /* We can reuse as3711_subdevs[], it will be copied in mfd_add_devices() */
157 if (pdata) {
158 as3711_subdevs[AS3711_REGULATOR].platform_data = &pdata->regulator;
159 as3711_subdevs[AS3711_REGULATOR].pdata_size = sizeof(pdata->regulator);
160 as3711_subdevs[AS3711_BACKLIGHT].platform_data = &pdata->backlight;
161 as3711_subdevs[AS3711_BACKLIGHT].pdata_size = sizeof(pdata->backlight);
162 } else {
163 as3711_subdevs[AS3711_REGULATOR].platform_data = NULL;
164 as3711_subdevs[AS3711_REGULATOR].pdata_size = 0;
165 as3711_subdevs[AS3711_BACKLIGHT].platform_data = NULL;
166 as3711_subdevs[AS3711_BACKLIGHT].pdata_size = 0;
167 }
168
169 ret = mfd_add_devices(as3711->dev, -1, as3711_subdevs,
170 ARRAY_SIZE(as3711_subdevs), NULL, 0, NULL);
171 if (ret < 0)
172 dev_err(&client->dev, "add mfd devices failed: %d\n", ret);
173
174 return ret;
175}
176
177static int as3711_i2c_remove(struct i2c_client *client)
178{
179 struct as3711 *as3711 = i2c_get_clientdata(client);
180
181 mfd_remove_devices(as3711->dev);
182 return 0;
183}
184
185static const struct i2c_device_id as3711_i2c_id[] = {
186 {.name = "as3711", .driver_data = 0},
187 {}
188};
189
190MODULE_DEVICE_TABLE(i2c, as3711_i2c_id);
191
192static struct i2c_driver as3711_i2c_driver = {
193 .driver = {
194 .name = "as3711",
195 .owner = THIS_MODULE,
196 },
197 .probe = as3711_i2c_probe,
198 .remove = as3711_i2c_remove,
199 .id_table = as3711_i2c_id,
200};
201
202static int __init as3711_i2c_init(void)
203{
204 return i2c_add_driver(&as3711_i2c_driver);
205}
206/* Initialise early */
207subsys_initcall(as3711_i2c_init);
208
209static void __exit as3711_i2c_exit(void)
210{
211 i2c_del_driver(&as3711_i2c_driver);
212}
213module_exit(as3711_i2c_exit);
214
215MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
216MODULE_DESCRIPTION("AS3711 PMIC driver");
217MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/as3711.h b/include/linux/mfd/as3711.h
new file mode 100644
index 000000000000..38452ce1e892
--- /dev/null
+++ b/include/linux/mfd/as3711.h
@@ -0,0 +1,126 @@
1/*
2 * AS3711 PMIC MFC driver header
3 *
4 * Copyright (C) 2012 Renesas Electronics Corporation
5 * Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the version 2 of the GNU General Public License as
9 * published by the Free Software Foundation
10 */
11
12#ifndef MFD_AS3711_H
13#define MFD_AS3711_H
14
15/*
16 * Client data
17 */
18
19/* Register addresses */
20#define AS3711_SD_1_VOLTAGE 0 /* Digital Step-Down */
21#define AS3711_SD_2_VOLTAGE 1
22#define AS3711_SD_3_VOLTAGE 2
23#define AS3711_SD_4_VOLTAGE 3
24#define AS3711_LDO_1_VOLTAGE 4 /* Analog LDO */
25#define AS3711_LDO_2_VOLTAGE 5
26#define AS3711_LDO_3_VOLTAGE 6 /* Digital LDO */
27#define AS3711_LDO_4_VOLTAGE 7
28#define AS3711_LDO_5_VOLTAGE 8
29#define AS3711_LDO_6_VOLTAGE 9
30#define AS3711_LDO_7_VOLTAGE 0xa
31#define AS3711_LDO_8_VOLTAGE 0xb
32#define AS3711_SD_CONTROL 0x10
33#define AS3711_GPIO_SIGNAL_OUT 0x20
34#define AS3711_GPIO_SIGNAL_IN 0x21
35#define AS3711_SD_CONTROL_1 0x30
36#define AS3711_SD_CONTROL_2 0x31
37#define AS3711_CURR_CONTROL 0x40
38#define AS3711_CURR1_VALUE 0x43
39#define AS3711_CURR2_VALUE 0x44
40#define AS3711_CURR3_VALUE 0x45
41#define AS3711_STEPUP_CONTROL_1 0x50
42#define AS3711_STEPUP_CONTROL_2 0x51
43#define AS3711_STEPUP_CONTROL_4 0x53
44#define AS3711_STEPUP_CONTROL_5 0x54
45#define AS3711_REG_STATUS 0x73
46#define AS3711_INTERRUPT_STATUS_1 0x77
47#define AS3711_INTERRUPT_STATUS_2 0x78
48#define AS3711_INTERRUPT_STATUS_3 0x79
49#define AS3711_CHARGER_STATUS_1 0x86
50#define AS3711_CHARGER_STATUS_2 0x87
51#define AS3711_ASIC_ID_1 0x90
52#define AS3711_ASIC_ID_2 0x91
53
54#define AS3711_MAX_REGS 0x92
55
56/* Regulators */
57enum {
58 AS3711_REGULATOR_SD_1,
59 AS3711_REGULATOR_SD_2,
60 AS3711_REGULATOR_SD_3,
61 AS3711_REGULATOR_SD_4,
62 AS3711_REGULATOR_LDO_1,
63 AS3711_REGULATOR_LDO_2,
64 AS3711_REGULATOR_LDO_3,
65 AS3711_REGULATOR_LDO_4,
66 AS3711_REGULATOR_LDO_5,
67 AS3711_REGULATOR_LDO_6,
68 AS3711_REGULATOR_LDO_7,
69 AS3711_REGULATOR_LDO_8,
70
71 AS3711_REGULATOR_MAX,
72};
73
74struct device;
75struct regmap;
76
77struct as3711 {
78 struct device *dev;
79 struct regmap *regmap;
80};
81
82#define AS3711_MAX_STEPDOWN 4
83#define AS3711_MAX_STEPUP 2
84#define AS3711_MAX_LDO 8
85
86enum as3711_su2_feedback {
87 AS3711_SU2_VOLTAGE,
88 AS3711_SU2_CURR1,
89 AS3711_SU2_CURR2,
90 AS3711_SU2_CURR3,
91 AS3711_SU2_CURR_AUTO,
92};
93
94enum as3711_su2_fbprot {
95 AS3711_SU2_LX_SD4,
96 AS3711_SU2_GPIO2,
97 AS3711_SU2_GPIO3,
98 AS3711_SU2_GPIO4,
99};
100
101/*
102 * Platform data
103 */
104
105struct as3711_regulator_pdata {
106 struct regulator_init_data *init_data[AS3711_REGULATOR_MAX];
107};
108
109struct as3711_bl_pdata {
110 const char *su1_fb;
111 int su1_max_uA;
112 const char *su2_fb;
113 int su2_max_uA;
114 enum as3711_su2_feedback su2_feedback;
115 enum as3711_su2_fbprot su2_fbprot;
116 bool su2_auto_curr1;
117 bool su2_auto_curr2;
118 bool su2_auto_curr3;
119};
120
121struct as3711_platform_data {
122 struct as3711_regulator_pdata regulator;
123 struct as3711_bl_pdata backlight;
124};
125
126#endif
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-06 01:31:01 -0500