diff options
author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-08-16 13:42:58 -0400 |
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committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-08-16 13:42:58 -0400 |
commit | e4862f2f6f5653dfb67f3ba2b6f0bc74516ed51a (patch) | |
tree | 1db5a0540a4eecfad9b7daee476b985e82ddc810 /drivers/mfd/max8998.c | |
parent | ec62dbd7eb8e3dddb221da89ecbcea0fc3dee8c1 (diff) | |
parent | b2c1e07b81a126e5846dfc3d36f559d861df59f4 (diff) |
Merge branch 'for-2.6.36' into for-2.6.37
Fairly simple conflicts, the most serious ones are the i.MX ones which I
suspect now need another rename.
Conflicts:
arch/arm/mach-mx2/clock_imx27.c
arch/arm/mach-mx2/devices.c
arch/arm/mach-omap2/board-rx51-peripherals.c
arch/arm/mach-omap2/board-zoom2.c
sound/soc/fsl/mpc5200_dma.c
sound/soc/fsl/mpc5200_dma.h
sound/soc/fsl/mpc8610_hpcd.c
sound/soc/pxa/spitz.c
Diffstat (limited to 'drivers/mfd/max8998.c')
-rw-r--r-- | drivers/mfd/max8998.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/drivers/mfd/max8998.c b/drivers/mfd/max8998.c new file mode 100644 index 000000000000..73e6f5c4efc9 --- /dev/null +++ b/drivers/mfd/max8998.c | |||
@@ -0,0 +1,158 @@ | |||
1 | /* | ||
2 | * max8698.c - mfd core driver for the Maxim 8998 | ||
3 | * | ||
4 | * Copyright (C) 2009-2010 Samsung Electronics | ||
5 | * Kyungmin Park <kyungmin.park@samsung.com> | ||
6 | * Marek Szyprowski <m.szyprowski@samsung.com> | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or modify | ||
9 | * it under the terms of the GNU General Public License as published by | ||
10 | * the Free Software Foundation; either version 2 of the License, or | ||
11 | * (at your option) any later version. | ||
12 | * | ||
13 | * This program is distributed in the hope that it will be useful, | ||
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
16 | * GNU General Public License for more details. | ||
17 | * | ||
18 | * You should have received a copy of the GNU General Public License | ||
19 | * along with this program; if not, write to the Free Software | ||
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
21 | */ | ||
22 | |||
23 | #include <linux/module.h> | ||
24 | #include <linux/moduleparam.h> | ||
25 | #include <linux/init.h> | ||
26 | #include <linux/slab.h> | ||
27 | #include <linux/i2c.h> | ||
28 | #include <linux/mutex.h> | ||
29 | #include <linux/mfd/core.h> | ||
30 | #include <linux/mfd/max8998.h> | ||
31 | #include <linux/mfd/max8998-private.h> | ||
32 | |||
33 | static struct mfd_cell max8998_devs[] = { | ||
34 | { | ||
35 | .name = "max8998-pmic", | ||
36 | } | ||
37 | }; | ||
38 | |||
39 | static int max8998_i2c_device_read(struct max8998_dev *max8998, u8 reg, u8 *dest) | ||
40 | { | ||
41 | struct i2c_client *client = max8998->i2c_client; | ||
42 | int ret; | ||
43 | |||
44 | mutex_lock(&max8998->iolock); | ||
45 | ret = i2c_smbus_read_byte_data(client, reg); | ||
46 | mutex_unlock(&max8998->iolock); | ||
47 | if (ret < 0) | ||
48 | return ret; | ||
49 | |||
50 | ret &= 0xff; | ||
51 | *dest = ret; | ||
52 | return 0; | ||
53 | } | ||
54 | |||
55 | static int max8998_i2c_device_write(struct max8998_dev *max8998, u8 reg, u8 value) | ||
56 | { | ||
57 | struct i2c_client *client = max8998->i2c_client; | ||
58 | int ret; | ||
59 | |||
60 | mutex_lock(&max8998->iolock); | ||
61 | ret = i2c_smbus_write_byte_data(client, reg, value); | ||
62 | mutex_unlock(&max8998->iolock); | ||
63 | return ret; | ||
64 | } | ||
65 | |||
66 | static int max8998_i2c_device_update(struct max8998_dev *max8998, u8 reg, | ||
67 | u8 val, u8 mask) | ||
68 | { | ||
69 | struct i2c_client *client = max8998->i2c_client; | ||
70 | int ret; | ||
71 | |||
72 | mutex_lock(&max8998->iolock); | ||
73 | ret = i2c_smbus_read_byte_data(client, reg); | ||
74 | if (ret >= 0) { | ||
75 | u8 old_val = ret & 0xff; | ||
76 | u8 new_val = (val & mask) | (old_val & (~mask)); | ||
77 | ret = i2c_smbus_write_byte_data(client, reg, new_val); | ||
78 | if (ret >= 0) | ||
79 | ret = 0; | ||
80 | } | ||
81 | mutex_unlock(&max8998->iolock); | ||
82 | return ret; | ||
83 | } | ||
84 | |||
85 | static int max8998_i2c_probe(struct i2c_client *i2c, | ||
86 | const struct i2c_device_id *id) | ||
87 | { | ||
88 | struct max8998_dev *max8998; | ||
89 | int ret = 0; | ||
90 | |||
91 | max8998 = kzalloc(sizeof(struct max8998_dev), GFP_KERNEL); | ||
92 | if (max8998 == NULL) | ||
93 | return -ENOMEM; | ||
94 | |||
95 | i2c_set_clientdata(i2c, max8998); | ||
96 | max8998->dev = &i2c->dev; | ||
97 | max8998->i2c_client = i2c; | ||
98 | max8998->dev_read = max8998_i2c_device_read; | ||
99 | max8998->dev_write = max8998_i2c_device_write; | ||
100 | max8998->dev_update = max8998_i2c_device_update; | ||
101 | mutex_init(&max8998->iolock); | ||
102 | |||
103 | ret = mfd_add_devices(max8998->dev, -1, | ||
104 | max8998_devs, ARRAY_SIZE(max8998_devs), | ||
105 | NULL, 0); | ||
106 | if (ret < 0) | ||
107 | goto err; | ||
108 | |||
109 | return ret; | ||
110 | |||
111 | err: | ||
112 | mfd_remove_devices(max8998->dev); | ||
113 | kfree(max8998); | ||
114 | return ret; | ||
115 | } | ||
116 | |||
117 | static int max8998_i2c_remove(struct i2c_client *i2c) | ||
118 | { | ||
119 | struct max8998_dev *max8998 = i2c_get_clientdata(i2c); | ||
120 | |||
121 | mfd_remove_devices(max8998->dev); | ||
122 | kfree(max8998); | ||
123 | |||
124 | return 0; | ||
125 | } | ||
126 | |||
127 | static const struct i2c_device_id max8998_i2c_id[] = { | ||
128 | { "max8998", 0 }, | ||
129 | { } | ||
130 | }; | ||
131 | MODULE_DEVICE_TABLE(i2c, max8998_i2c_id); | ||
132 | |||
133 | static struct i2c_driver max8998_i2c_driver = { | ||
134 | .driver = { | ||
135 | .name = "max8998", | ||
136 | .owner = THIS_MODULE, | ||
137 | }, | ||
138 | .probe = max8998_i2c_probe, | ||
139 | .remove = max8998_i2c_remove, | ||
140 | .id_table = max8998_i2c_id, | ||
141 | }; | ||
142 | |||
143 | static int __init max8998_i2c_init(void) | ||
144 | { | ||
145 | return i2c_add_driver(&max8998_i2c_driver); | ||
146 | } | ||
147 | /* init early so consumer devices can complete system boot */ | ||
148 | subsys_initcall(max8998_i2c_init); | ||
149 | |||
150 | static void __exit max8998_i2c_exit(void) | ||
151 | { | ||
152 | i2c_del_driver(&max8998_i2c_driver); | ||
153 | } | ||
154 | module_exit(max8998_i2c_exit); | ||
155 | |||
156 | MODULE_DESCRIPTION("MAXIM 8998 multi-function core driver"); | ||
157 | MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); | ||
158 | MODULE_LICENSE("GPL"); | ||