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-rw-r--r--drivers/i2c/chips/Kconfig48
-rw-r--r--drivers/i2c/chips/Makefile3
-rw-r--r--drivers/i2c/chips/pca9539.c152
-rw-r--r--drivers/i2c/chips/pcf8574.c215
-rw-r--r--drivers/i2c/chips/pcf8575.c198
-rw-r--r--drivers/i2c/chips/tsl2550.c42
6 files changed, 10 insertions, 648 deletions
diff --git a/drivers/i2c/chips/Kconfig b/drivers/i2c/chips/Kconfig
index 02d746c9c474..f9618f4d4e47 100644
--- a/drivers/i2c/chips/Kconfig
+++ b/drivers/i2c/chips/Kconfig
@@ -16,54 +16,6 @@ config DS1682
16 This driver can also be built as a module. If so, the module 16 This driver can also be built as a module. If so, the module
17 will be called ds1682. 17 will be called ds1682.
18 18
19config SENSORS_PCF8574
20 tristate "Philips PCF8574 and PCF8574A (DEPRECATED)"
21 depends on EXPERIMENTAL && GPIO_PCF857X = "n"
22 default n
23 help
24 If you say yes here you get support for Philips PCF8574 and
25 PCF8574A chips. These chips are 8-bit I/O expanders for the I2C bus.
26
27 This driver can also be built as a module. If so, the module
28 will be called pcf8574.
29
30 This driver is deprecated and will be dropped soon. Use
31 drivers/gpio/pcf857x.c instead.
32
33 These devices are hard to detect and rarely found on mainstream
34 hardware. If unsure, say N.
35
36config PCF8575
37 tristate "Philips PCF8575 (DEPRECATED)"
38 default n
39 depends on GPIO_PCF857X = "n"
40 help
41 If you say yes here you get support for Philips PCF8575 chip.
42 This chip is a 16-bit I/O expander for the I2C bus. Several other
43 chip manufacturers sell equivalent chips, e.g. Texas Instruments.
44
45 This driver can also be built as a module. If so, the module
46 will be called pcf8575.
47
48 This driver is deprecated and will be dropped soon. Use
49 drivers/gpio/pcf857x.c instead.
50
51 This device is hard to detect and is rarely found on mainstream
52 hardware. If unsure, say N.
53
54config SENSORS_PCA9539
55 tristate "Philips PCA9539 16-bit I/O port (DEPRECATED)"
56 depends on EXPERIMENTAL && GPIO_PCA953X = "n"
57 help
58 If you say yes here you get support for the Philips PCA9539
59 16-bit I/O port.
60
61 This driver can also be built as a module. If so, the module
62 will be called pca9539.
63
64 This driver is deprecated and will be dropped soon. Use
65 drivers/gpio/pca953x.c instead.
66
67config SENSORS_TSL2550 19config SENSORS_TSL2550
68 tristate "Taos TSL2550 ambient light sensor" 20 tristate "Taos TSL2550 ambient light sensor"
69 depends on EXPERIMENTAL 21 depends on EXPERIMENTAL
diff --git a/drivers/i2c/chips/Makefile b/drivers/i2c/chips/Makefile
index f4680d16ee34..749cf3606294 100644
--- a/drivers/i2c/chips/Makefile
+++ b/drivers/i2c/chips/Makefile
@@ -11,9 +11,6 @@
11# 11#
12 12
13obj-$(CONFIG_DS1682) += ds1682.o 13obj-$(CONFIG_DS1682) += ds1682.o
14obj-$(CONFIG_SENSORS_PCA9539) += pca9539.o
15obj-$(CONFIG_SENSORS_PCF8574) += pcf8574.o
16obj-$(CONFIG_PCF8575) += pcf8575.o
17obj-$(CONFIG_SENSORS_TSL2550) += tsl2550.o 14obj-$(CONFIG_SENSORS_TSL2550) += tsl2550.o
18 15
19ifeq ($(CONFIG_I2C_DEBUG_CHIP),y) 16ifeq ($(CONFIG_I2C_DEBUG_CHIP),y)
diff --git a/drivers/i2c/chips/pca9539.c b/drivers/i2c/chips/pca9539.c
deleted file mode 100644
index 270de4e56a81..000000000000
--- a/drivers/i2c/chips/pca9539.c
+++ /dev/null
@@ -1,152 +0,0 @@
1/*
2 pca9539.c - 16-bit I/O port with interrupt and reset
3
4 Copyright (C) 2005 Ben Gardner <bgardner@wabtec.com>
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; version 2 of the License.
9*/
10
11#include <linux/module.h>
12#include <linux/init.h>
13#include <linux/slab.h>
14#include <linux/i2c.h>
15#include <linux/hwmon-sysfs.h>
16
17/* Addresses to scan: none, device is not autodetected */
18static const unsigned short normal_i2c[] = { I2C_CLIENT_END };
19
20/* Insmod parameters */
21I2C_CLIENT_INSMOD_1(pca9539);
22
23enum pca9539_cmd
24{
25 PCA9539_INPUT_0 = 0,
26 PCA9539_INPUT_1 = 1,
27 PCA9539_OUTPUT_0 = 2,
28 PCA9539_OUTPUT_1 = 3,
29 PCA9539_INVERT_0 = 4,
30 PCA9539_INVERT_1 = 5,
31 PCA9539_DIRECTION_0 = 6,
32 PCA9539_DIRECTION_1 = 7,
33};
34
35/* following are the sysfs callback functions */
36static ssize_t pca9539_show(struct device *dev, struct device_attribute *attr,
37 char *buf)
38{
39 struct sensor_device_attribute *psa = to_sensor_dev_attr(attr);
40 struct i2c_client *client = to_i2c_client(dev);
41 return sprintf(buf, "%d\n", i2c_smbus_read_byte_data(client,
42 psa->index));
43}
44
45static ssize_t pca9539_store(struct device *dev, struct device_attribute *attr,
46 const char *buf, size_t count)
47{
48 struct sensor_device_attribute *psa = to_sensor_dev_attr(attr);
49 struct i2c_client *client = to_i2c_client(dev);
50 unsigned long val = simple_strtoul(buf, NULL, 0);
51 if (val > 0xff)
52 return -EINVAL;
53 i2c_smbus_write_byte_data(client, psa->index, val);
54 return count;
55}
56
57/* Define the device attributes */
58
59#define PCA9539_ENTRY_RO(name, cmd_idx) \
60 static SENSOR_DEVICE_ATTR(name, S_IRUGO, pca9539_show, NULL, cmd_idx)
61
62#define PCA9539_ENTRY_RW(name, cmd_idx) \
63 static SENSOR_DEVICE_ATTR(name, S_IRUGO | S_IWUSR, pca9539_show, \
64 pca9539_store, cmd_idx)
65
66PCA9539_ENTRY_RO(input0, PCA9539_INPUT_0);
67PCA9539_ENTRY_RO(input1, PCA9539_INPUT_1);
68PCA9539_ENTRY_RW(output0, PCA9539_OUTPUT_0);
69PCA9539_ENTRY_RW(output1, PCA9539_OUTPUT_1);
70PCA9539_ENTRY_RW(invert0, PCA9539_INVERT_0);
71PCA9539_ENTRY_RW(invert1, PCA9539_INVERT_1);
72PCA9539_ENTRY_RW(direction0, PCA9539_DIRECTION_0);
73PCA9539_ENTRY_RW(direction1, PCA9539_DIRECTION_1);
74
75static struct attribute *pca9539_attributes[] = {
76 &sensor_dev_attr_input0.dev_attr.attr,
77 &sensor_dev_attr_input1.dev_attr.attr,
78 &sensor_dev_attr_output0.dev_attr.attr,
79 &sensor_dev_attr_output1.dev_attr.attr,
80 &sensor_dev_attr_invert0.dev_attr.attr,
81 &sensor_dev_attr_invert1.dev_attr.attr,
82 &sensor_dev_attr_direction0.dev_attr.attr,
83 &sensor_dev_attr_direction1.dev_attr.attr,
84 NULL
85};
86
87static struct attribute_group pca9539_defattr_group = {
88 .attrs = pca9539_attributes,
89};
90
91/* Return 0 if detection is successful, -ENODEV otherwise */
92static int pca9539_detect(struct i2c_client *client, int kind,
93 struct i2c_board_info *info)
94{
95 struct i2c_adapter *adapter = client->adapter;
96
97 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
98 return -ENODEV;
99
100 strlcpy(info->type, "pca9539", I2C_NAME_SIZE);
101
102 return 0;
103}
104
105static int pca9539_probe(struct i2c_client *client,
106 const struct i2c_device_id *id)
107{
108 /* Register sysfs hooks */
109 return sysfs_create_group(&client->dev.kobj,
110 &pca9539_defattr_group);
111}
112
113static int pca9539_remove(struct i2c_client *client)
114{
115 sysfs_remove_group(&client->dev.kobj, &pca9539_defattr_group);
116 return 0;
117}
118
119static const struct i2c_device_id pca9539_id[] = {
120 { "pca9539", 0 },
121 { }
122};
123
124static struct i2c_driver pca9539_driver = {
125 .driver = {
126 .name = "pca9539",
127 },
128 .probe = pca9539_probe,
129 .remove = pca9539_remove,
130 .id_table = pca9539_id,
131
132 .detect = pca9539_detect,
133 .address_data = &addr_data,
134};
135
136static int __init pca9539_init(void)
137{
138 return i2c_add_driver(&pca9539_driver);
139}
140
141static void __exit pca9539_exit(void)
142{
143 i2c_del_driver(&pca9539_driver);
144}
145
146MODULE_AUTHOR("Ben Gardner <bgardner@wabtec.com>");
147MODULE_DESCRIPTION("PCA9539 driver");
148MODULE_LICENSE("GPL");
149
150module_init(pca9539_init);
151module_exit(pca9539_exit);
152
diff --git a/drivers/i2c/chips/pcf8574.c b/drivers/i2c/chips/pcf8574.c
deleted file mode 100644
index 6ec309894c88..000000000000
--- a/drivers/i2c/chips/pcf8574.c
+++ /dev/null
@@ -1,215 +0,0 @@
1/*
2 Copyright (c) 2000 Frodo Looijaard <frodol@dds.nl>,
3 Philip Edelbrock <phil@netroedge.com>,
4 Dan Eaton <dan.eaton@rocketlogix.com>
5 Ported to Linux 2.6 by Aurelien Jarno <aurel32@debian.org> with
6 the help of Jean Delvare <khali@linux-fr.org>
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., 675 Mass Ave, Cambridge, MA 02139, USA.
21*/
22
23/* A few notes about the PCF8574:
24
25* The PCF8574 is an 8-bit I/O expander for the I2C bus produced by
26 Philips Semiconductors. It is designed to provide a byte I2C
27 interface to up to 8 separate devices.
28
29* The PCF8574 appears as a very simple SMBus device which can be
30 read from or written to with SMBUS byte read/write accesses.
31
32 --Dan
33
34*/
35
36#include <linux/module.h>
37#include <linux/init.h>
38#include <linux/slab.h>
39#include <linux/i2c.h>
40
41/* Addresses to scan: none, device can't be detected */
42static const unsigned short normal_i2c[] = { I2C_CLIENT_END };
43
44/* Insmod parameters */
45I2C_CLIENT_INSMOD_2(pcf8574, pcf8574a);
46
47/* Each client has this additional data */
48struct pcf8574_data {
49 int write; /* Remember last written value */
50};
51
52static void pcf8574_init_client(struct i2c_client *client);
53
54/* following are the sysfs callback functions */
55static ssize_t show_read(struct device *dev, struct device_attribute *attr, char *buf)
56{
57 struct i2c_client *client = to_i2c_client(dev);
58 return sprintf(buf, "%u\n", i2c_smbus_read_byte(client));
59}
60
61static DEVICE_ATTR(read, S_IRUGO, show_read, NULL);
62
63static ssize_t show_write(struct device *dev, struct device_attribute *attr, char *buf)
64{
65 struct pcf8574_data *data = i2c_get_clientdata(to_i2c_client(dev));
66
67 if (data->write < 0)
68 return data->write;
69
70 return sprintf(buf, "%d\n", data->write);
71}
72
73static ssize_t set_write(struct device *dev, struct device_attribute *attr, const char *buf,
74 size_t count)
75{
76 struct i2c_client *client = to_i2c_client(dev);
77 struct pcf8574_data *data = i2c_get_clientdata(client);
78 unsigned long val = simple_strtoul(buf, NULL, 10);
79
80 if (val > 0xff)
81 return -EINVAL;
82
83 data->write = val;
84 i2c_smbus_write_byte(client, data->write);
85 return count;
86}
87
88static DEVICE_ATTR(write, S_IWUSR | S_IRUGO, show_write, set_write);
89
90static struct attribute *pcf8574_attributes[] = {
91 &dev_attr_read.attr,
92 &dev_attr_write.attr,
93 NULL
94};
95
96static const struct attribute_group pcf8574_attr_group = {
97 .attrs = pcf8574_attributes,
98};
99
100/*
101 * Real code
102 */
103
104/* Return 0 if detection is successful, -ENODEV otherwise */
105static int pcf8574_detect(struct i2c_client *client, int kind,
106 struct i2c_board_info *info)
107{
108 struct i2c_adapter *adapter = client->adapter;
109 const char *client_name;
110
111 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
112 return -ENODEV;
113
114 /* Now, we would do the remaining detection. But the PCF8574 is plainly
115 impossible to detect! Stupid chip. */
116
117 /* Determine the chip type */
118 if (kind <= 0) {
119 if (client->addr >= 0x38 && client->addr <= 0x3f)
120 kind = pcf8574a;
121 else
122 kind = pcf8574;
123 }
124
125 if (kind == pcf8574a)
126 client_name = "pcf8574a";
127 else
128 client_name = "pcf8574";
129 strlcpy(info->type, client_name, I2C_NAME_SIZE);
130
131 return 0;
132}
133
134static int pcf8574_probe(struct i2c_client *client,
135 const struct i2c_device_id *id)
136{
137 struct pcf8574_data *data;
138 int err;
139
140 data = kzalloc(sizeof(struct pcf8574_data), GFP_KERNEL);
141 if (!data) {
142 err = -ENOMEM;
143 goto exit;
144 }
145
146 i2c_set_clientdata(client, data);
147
148 /* Initialize the PCF8574 chip */
149 pcf8574_init_client(client);
150
151 /* Register sysfs hooks */
152 err = sysfs_create_group(&client->dev.kobj, &pcf8574_attr_group);
153 if (err)
154 goto exit_free;
155 return 0;
156
157 exit_free:
158 kfree(data);
159 exit:
160 return err;
161}
162
163static int pcf8574_remove(struct i2c_client *client)
164{
165 sysfs_remove_group(&client->dev.kobj, &pcf8574_attr_group);
166 kfree(i2c_get_clientdata(client));
167 return 0;
168}
169
170/* Called when we have found a new PCF8574. */
171static void pcf8574_init_client(struct i2c_client *client)
172{
173 struct pcf8574_data *data = i2c_get_clientdata(client);
174 data->write = -EAGAIN;
175}
176
177static const struct i2c_device_id pcf8574_id[] = {
178 { "pcf8574", 0 },
179 { "pcf8574a", 0 },
180 { }
181};
182
183static struct i2c_driver pcf8574_driver = {
184 .driver = {
185 .name = "pcf8574",
186 },
187 .probe = pcf8574_probe,
188 .remove = pcf8574_remove,
189 .id_table = pcf8574_id,
190
191 .detect = pcf8574_detect,
192 .address_data = &addr_data,
193};
194
195static int __init pcf8574_init(void)
196{
197 return i2c_add_driver(&pcf8574_driver);
198}
199
200static void __exit pcf8574_exit(void)
201{
202 i2c_del_driver(&pcf8574_driver);
203}
204
205
206MODULE_AUTHOR
207 ("Frodo Looijaard <frodol@dds.nl>, "
208 "Philip Edelbrock <phil@netroedge.com>, "
209 "Dan Eaton <dan.eaton@rocketlogix.com> "
210 "and Aurelien Jarno <aurelien@aurel32.net>");
211MODULE_DESCRIPTION("PCF8574 driver");
212MODULE_LICENSE("GPL");
213
214module_init(pcf8574_init);
215module_exit(pcf8574_exit);
diff --git a/drivers/i2c/chips/pcf8575.c b/drivers/i2c/chips/pcf8575.c
deleted file mode 100644
index 07fd7cb3c57d..000000000000
--- a/drivers/i2c/chips/pcf8575.c
+++ /dev/null
@@ -1,198 +0,0 @@
1/*
2 pcf8575.c
3
4 About the PCF8575 chip: the PCF8575 is a 16-bit I/O expander for the I2C bus
5 produced by a.o. Philips Semiconductors.
6
7 Copyright (C) 2006 Michael Hennerich, Analog Devices Inc.
8 <hennerich@blackfin.uclinux.org>
9 Based on pcf8574.c.
10
11 Copyright (c) 2007 Bart Van Assche <bart.vanassche@gmail.com>.
12 Ported this driver from ucLinux to the mainstream Linux kernel.
13
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 2 of the License, or
17 (at your option) any later version.
18
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
23
24 You should have received a copy of the GNU General Public License
25 along with this program; if not, write to the Free Software
26 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27*/
28
29#include <linux/module.h>
30#include <linux/init.h>
31#include <linux/i2c.h>
32#include <linux/slab.h> /* kzalloc() */
33#include <linux/sysfs.h> /* sysfs_create_group() */
34
35/* Addresses to scan: none, device can't be detected */
36static const unsigned short normal_i2c[] = { I2C_CLIENT_END };
37
38/* Insmod parameters */
39I2C_CLIENT_INSMOD;
40
41
42/* Each client has this additional data */
43struct pcf8575_data {
44 int write; /* last written value, or error code */
45};
46
47/* following are the sysfs callback functions */
48static ssize_t show_read(struct device *dev, struct device_attribute *attr,
49 char *buf)
50{
51 struct i2c_client *client = to_i2c_client(dev);
52 u16 val;
53 u8 iopin_state[2];
54
55 i2c_master_recv(client, iopin_state, 2);
56
57 val = iopin_state[0];
58 val |= iopin_state[1] << 8;
59
60 return sprintf(buf, "%u\n", val);
61}
62
63static DEVICE_ATTR(read, S_IRUGO, show_read, NULL);
64
65static ssize_t show_write(struct device *dev, struct device_attribute *attr,
66 char *buf)
67{
68 struct pcf8575_data *data = dev_get_drvdata(dev);
69 if (data->write < 0)
70 return data->write;
71 return sprintf(buf, "%d\n", data->write);
72}
73
74static ssize_t set_write(struct device *dev, struct device_attribute *attr,
75 const char *buf, size_t count)
76{
77 struct i2c_client *client = to_i2c_client(dev);
78 struct pcf8575_data *data = i2c_get_clientdata(client);
79 unsigned long val = simple_strtoul(buf, NULL, 10);
80 u8 iopin_state[2];
81
82 if (val > 0xffff)
83 return -EINVAL;
84
85 data->write = val;
86
87 iopin_state[0] = val & 0xFF;
88 iopin_state[1] = val >> 8;
89
90 i2c_master_send(client, iopin_state, 2);
91
92 return count;
93}
94
95static DEVICE_ATTR(write, S_IWUSR | S_IRUGO, show_write, set_write);
96
97static struct attribute *pcf8575_attributes[] = {
98 &dev_attr_read.attr,
99 &dev_attr_write.attr,
100 NULL
101};
102
103static const struct attribute_group pcf8575_attr_group = {
104 .attrs = pcf8575_attributes,
105};
106
107/*
108 * Real code
109 */
110
111/* Return 0 if detection is successful, -ENODEV otherwise */
112static int pcf8575_detect(struct i2c_client *client, int kind,
113 struct i2c_board_info *info)
114{
115 struct i2c_adapter *adapter = client->adapter;
116
117 if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
118 return -ENODEV;
119
120 /* This is the place to detect whether the chip at the specified
121 address really is a PCF8575 chip. However, there is no method known
122 to detect whether an I2C chip is a PCF8575 or any other I2C chip. */
123
124 strlcpy(info->type, "pcf8575", I2C_NAME_SIZE);
125
126 return 0;
127}
128
129static int pcf8575_probe(struct i2c_client *client,
130 const struct i2c_device_id *id)
131{
132 struct pcf8575_data *data;
133 int err;
134
135 data = kzalloc(sizeof(struct pcf8575_data), GFP_KERNEL);
136 if (!data) {
137 err = -ENOMEM;
138 goto exit;
139 }
140
141 i2c_set_clientdata(client, data);
142 data->write = -EAGAIN;
143
144 /* Register sysfs hooks */
145 err = sysfs_create_group(&client->dev.kobj, &pcf8575_attr_group);
146 if (err)
147 goto exit_free;
148
149 return 0;
150
151exit_free:
152 kfree(data);
153exit:
154 return err;
155}
156
157static int pcf8575_remove(struct i2c_client *client)
158{
159 sysfs_remove_group(&client->dev.kobj, &pcf8575_attr_group);
160 kfree(i2c_get_clientdata(client));
161 return 0;
162}
163
164static const struct i2c_device_id pcf8575_id[] = {
165 { "pcf8575", 0 },
166 { }
167};
168
169static struct i2c_driver pcf8575_driver = {
170 .driver = {
171 .owner = THIS_MODULE,
172 .name = "pcf8575",
173 },
174 .probe = pcf8575_probe,
175 .remove = pcf8575_remove,
176 .id_table = pcf8575_id,
177
178 .detect = pcf8575_detect,
179 .address_data = &addr_data,
180};
181
182static int __init pcf8575_init(void)
183{
184 return i2c_add_driver(&pcf8575_driver);
185}
186
187static void __exit pcf8575_exit(void)
188{
189 i2c_del_driver(&pcf8575_driver);
190}
191
192MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>, "
193 "Bart Van Assche <bart.vanassche@gmail.com>");
194MODULE_DESCRIPTION("pcf8575 driver");
195MODULE_LICENSE("GPL");
196
197module_init(pcf8575_init);
198module_exit(pcf8575_exit);
diff --git a/drivers/i2c/chips/tsl2550.c b/drivers/i2c/chips/tsl2550.c
index b96f3025e588..aa96bd2d27ea 100644
--- a/drivers/i2c/chips/tsl2550.c
+++ b/drivers/i2c/chips/tsl2550.c
@@ -24,10 +24,9 @@
24#include <linux/slab.h> 24#include <linux/slab.h>
25#include <linux/i2c.h> 25#include <linux/i2c.h>
26#include <linux/mutex.h> 26#include <linux/mutex.h>
27#include <linux/delay.h>
28 27
29#define TSL2550_DRV_NAME "tsl2550" 28#define TSL2550_DRV_NAME "tsl2550"
30#define DRIVER_VERSION "1.1.2" 29#define DRIVER_VERSION "1.2"
31 30
32/* 31/*
33 * Defines 32 * Defines
@@ -96,32 +95,13 @@ static int tsl2550_set_power_state(struct i2c_client *client, int state)
96 95
97static int tsl2550_get_adc_value(struct i2c_client *client, u8 cmd) 96static int tsl2550_get_adc_value(struct i2c_client *client, u8 cmd)
98{ 97{
99 unsigned long end; 98 int ret;
100 int loop = 0, ret = 0;
101 99
102 /* 100 ret = i2c_smbus_read_byte_data(client, cmd);
103 * Read ADC channel waiting at most 400ms (see data sheet for further 101 if (ret < 0)
104 * info). 102 return ret;
105 * To avoid long busy wait we spin for few milliseconds then
106 * start sleeping.
107 */
108 end = jiffies + msecs_to_jiffies(400);
109 while (time_before(jiffies, end)) {
110 i2c_smbus_write_byte(client, cmd);
111
112 if (loop++ < 5)
113 mdelay(1);
114 else
115 msleep(1);
116
117 ret = i2c_smbus_read_byte(client);
118 if (ret < 0)
119 return ret;
120 else if (ret & 0x0080)
121 break;
122 }
123 if (!(ret & 0x80)) 103 if (!(ret & 0x80))
124 return -EIO; 104 return -EAGAIN;
125 return ret & 0x7f; /* remove the "valid" bit */ 105 return ret & 0x7f; /* remove the "valid" bit */
126} 106}
127 107
@@ -285,8 +265,6 @@ static ssize_t __tsl2550_show_lux(struct i2c_client *client, char *buf)
285 return ret; 265 return ret;
286 ch0 = ret; 266 ch0 = ret;
287 267
288 mdelay(1);
289
290 ret = tsl2550_get_adc_value(client, TSL2550_READ_ADC1); 268 ret = tsl2550_get_adc_value(client, TSL2550_READ_ADC1);
291 if (ret < 0) 269 if (ret < 0)
292 return ret; 270 return ret;
@@ -345,11 +323,10 @@ static int tsl2550_init_client(struct i2c_client *client)
345 * Probe the chip. To do so we try to power up the device and then to 323 * Probe the chip. To do so we try to power up the device and then to
346 * read back the 0x03 code 324 * read back the 0x03 code
347 */ 325 */
348 err = i2c_smbus_write_byte(client, TSL2550_POWER_UP); 326 err = i2c_smbus_read_byte_data(client, TSL2550_POWER_UP);
349 if (err < 0) 327 if (err < 0)
350 return err; 328 return err;
351 mdelay(1); 329 if (err != TSL2550_POWER_UP)
352 if (i2c_smbus_read_byte(client) != TSL2550_POWER_UP)
353 return -ENODEV; 330 return -ENODEV;
354 data->power_state = 1; 331 data->power_state = 1;
355 332
@@ -374,7 +351,8 @@ static int __devinit tsl2550_probe(struct i2c_client *client,
374 struct tsl2550_data *data; 351 struct tsl2550_data *data;
375 int *opmode, err = 0; 352 int *opmode, err = 0;
376 353
377 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) { 354 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WRITE_BYTE
355 | I2C_FUNC_SMBUS_READ_BYTE_DATA)) {
378 err = -EIO; 356 err = -EIO;
379 goto exit; 357 goto exit;
380 } 358 }
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-24 19:04:19 -0500