diff options
author | Adrian Bunk <bunk@kernel.org> | 2008-01-27 12:14:46 -0500 |
---|---|---|
committer | Jean Delvare <khali@hyperion.delvare> | 2008-01-27 12:14:46 -0500 |
commit | 7e8b99251be8b6f992baa88e3a6ba3c4ae01660b (patch) | |
tree | 9fec76cac149d4239ded7d2d4f020f0ec41e8ff8 /drivers/i2c/busses/i2c-ixp4xx.c | |
parent | 5a4a2387717ec57ec2a9154beb281e09c19fc26e (diff) |
i2c: some overdue driver removal
This patch contains the overdue removal of three I2C drivers.
[JD: In fact only i2c-ixp4xx can be removed at the moment, the other two
platforms don't implement the generic GPIO layer yet.]
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/i2c/busses/i2c-ixp4xx.c')
-rw-r--r-- | drivers/i2c/busses/i2c-ixp4xx.c | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/drivers/i2c/busses/i2c-ixp4xx.c b/drivers/i2c/busses/i2c-ixp4xx.c deleted file mode 100644 index 069ed7f3b395..000000000000 --- a/drivers/i2c/busses/i2c-ixp4xx.c +++ /dev/null | |||
@@ -1,178 +0,0 @@ | |||
1 | /* | ||
2 | * drivers/i2c/busses/i2c-ixp4xx.c | ||
3 | * | ||
4 | * Intel's IXP4xx XScale NPU chipsets (IXP420, 421, 422, 425) do not have | ||
5 | * an on board I2C controller but provide 16 GPIO pins that are often | ||
6 | * used to create an I2C bus. This driver provides an i2c_adapter | ||
7 | * interface that plugs in under algo_bit and drives the GPIO pins | ||
8 | * as instructed by the alogorithm driver. | ||
9 | * | ||
10 | * Author: Deepak Saxena <dsaxena@plexity.net> | ||
11 | * | ||
12 | * Copyright (c) 2003-2004 MontaVista Software Inc. | ||
13 | * | ||
14 | * This file is licensed under the terms of the GNU General Public | ||
15 | * License version 2. This program is licensed "as is" without any | ||
16 | * warranty of any kind, whether express or implied. | ||
17 | * | ||
18 | * NOTE: Since different platforms will use different GPIO pins for | ||
19 | * I2C, this driver uses an IXP4xx-specific platform_data | ||
20 | * pointer to pass the GPIO numbers to the driver. This | ||
21 | * allows us to support all the different IXP4xx platforms | ||
22 | * w/o having to put #ifdefs in this driver. | ||
23 | * | ||
24 | * See arch/arm/mach-ixp4xx/ixdp425.c for an example of building a | ||
25 | * device list and filling in the ixp4xx_i2c_pins data structure | ||
26 | * that is passed as the platform_data to this driver. | ||
27 | */ | ||
28 | |||
29 | #include <linux/kernel.h> | ||
30 | #include <linux/init.h> | ||
31 | #include <linux/platform_device.h> | ||
32 | #include <linux/module.h> | ||
33 | #include <linux/i2c.h> | ||
34 | #include <linux/i2c-algo-bit.h> | ||
35 | |||
36 | #include <asm/hardware.h> /* Pick up IXP4xx-specific bits */ | ||
37 | |||
38 | static inline int ixp4xx_scl_pin(void *data) | ||
39 | { | ||
40 | return ((struct ixp4xx_i2c_pins*)data)->scl_pin; | ||
41 | } | ||
42 | |||
43 | static inline int ixp4xx_sda_pin(void *data) | ||
44 | { | ||
45 | return ((struct ixp4xx_i2c_pins*)data)->sda_pin; | ||
46 | } | ||
47 | |||
48 | static void ixp4xx_bit_setscl(void *data, int val) | ||
49 | { | ||
50 | gpio_line_set(ixp4xx_scl_pin(data), 0); | ||
51 | gpio_line_config(ixp4xx_scl_pin(data), | ||
52 | val ? IXP4XX_GPIO_IN : IXP4XX_GPIO_OUT ); | ||
53 | } | ||
54 | |||
55 | static void ixp4xx_bit_setsda(void *data, int val) | ||
56 | { | ||
57 | gpio_line_set(ixp4xx_sda_pin(data), 0); | ||
58 | gpio_line_config(ixp4xx_sda_pin(data), | ||
59 | val ? IXP4XX_GPIO_IN : IXP4XX_GPIO_OUT ); | ||
60 | } | ||
61 | |||
62 | static int ixp4xx_bit_getscl(void *data) | ||
63 | { | ||
64 | int scl; | ||
65 | |||
66 | gpio_line_config(ixp4xx_scl_pin(data), IXP4XX_GPIO_IN ); | ||
67 | gpio_line_get(ixp4xx_scl_pin(data), &scl); | ||
68 | |||
69 | return scl; | ||
70 | } | ||
71 | |||
72 | static int ixp4xx_bit_getsda(void *data) | ||
73 | { | ||
74 | int sda; | ||
75 | |||
76 | gpio_line_config(ixp4xx_sda_pin(data), IXP4XX_GPIO_IN ); | ||
77 | gpio_line_get(ixp4xx_sda_pin(data), &sda); | ||
78 | |||
79 | return sda; | ||
80 | } | ||
81 | |||
82 | struct ixp4xx_i2c_data { | ||
83 | struct ixp4xx_i2c_pins *gpio_pins; | ||
84 | struct i2c_adapter adapter; | ||
85 | struct i2c_algo_bit_data algo_data; | ||
86 | }; | ||
87 | |||
88 | static int ixp4xx_i2c_remove(struct platform_device *plat_dev) | ||
89 | { | ||
90 | struct ixp4xx_i2c_data *drv_data = platform_get_drvdata(plat_dev); | ||
91 | |||
92 | platform_set_drvdata(plat_dev, NULL); | ||
93 | |||
94 | i2c_del_adapter(&drv_data->adapter); | ||
95 | |||
96 | kfree(drv_data); | ||
97 | |||
98 | return 0; | ||
99 | } | ||
100 | |||
101 | static int ixp4xx_i2c_probe(struct platform_device *plat_dev) | ||
102 | { | ||
103 | int err; | ||
104 | struct ixp4xx_i2c_pins *gpio = plat_dev->dev.platform_data; | ||
105 | struct ixp4xx_i2c_data *drv_data = | ||
106 | kzalloc(sizeof(struct ixp4xx_i2c_data), GFP_KERNEL); | ||
107 | |||
108 | if(!drv_data) | ||
109 | return -ENOMEM; | ||
110 | |||
111 | drv_data->gpio_pins = gpio; | ||
112 | |||
113 | /* | ||
114 | * We could make a lot of these structures static, but | ||
115 | * certain platforms may have multiple GPIO-based I2C | ||
116 | * buses for various device domains, so we need per-device | ||
117 | * algo_data->data. | ||
118 | */ | ||
119 | drv_data->algo_data.data = gpio; | ||
120 | drv_data->algo_data.setsda = ixp4xx_bit_setsda; | ||
121 | drv_data->algo_data.setscl = ixp4xx_bit_setscl; | ||
122 | drv_data->algo_data.getsda = ixp4xx_bit_getsda; | ||
123 | drv_data->algo_data.getscl = ixp4xx_bit_getscl; | ||
124 | drv_data->algo_data.udelay = 10; | ||
125 | drv_data->algo_data.timeout = 100; | ||
126 | |||
127 | drv_data->adapter.id = I2C_HW_B_IXP4XX; | ||
128 | drv_data->adapter.class = I2C_CLASS_HWMON; | ||
129 | strlcpy(drv_data->adapter.name, plat_dev->dev.driver->name, | ||
130 | sizeof(drv_data->adapter.name)); | ||
131 | drv_data->adapter.algo_data = &drv_data->algo_data; | ||
132 | |||
133 | drv_data->adapter.dev.parent = &plat_dev->dev; | ||
134 | |||
135 | gpio_line_config(gpio->scl_pin, IXP4XX_GPIO_IN); | ||
136 | gpio_line_config(gpio->sda_pin, IXP4XX_GPIO_IN); | ||
137 | gpio_line_set(gpio->scl_pin, 0); | ||
138 | gpio_line_set(gpio->sda_pin, 0); | ||
139 | |||
140 | err = i2c_bit_add_bus(&drv_data->adapter); | ||
141 | if (err) { | ||
142 | printk(KERN_ERR "ERROR: Could not install %s\n", plat_dev->dev.bus_id); | ||
143 | |||
144 | kfree(drv_data); | ||
145 | return err; | ||
146 | } | ||
147 | |||
148 | platform_set_drvdata(plat_dev, drv_data); | ||
149 | |||
150 | return 0; | ||
151 | } | ||
152 | |||
153 | static struct platform_driver ixp4xx_i2c_driver = { | ||
154 | .probe = ixp4xx_i2c_probe, | ||
155 | .remove = ixp4xx_i2c_remove, | ||
156 | .driver = { | ||
157 | .name = "IXP4XX-I2C", | ||
158 | .owner = THIS_MODULE, | ||
159 | }, | ||
160 | }; | ||
161 | |||
162 | static int __init ixp4xx_i2c_init(void) | ||
163 | { | ||
164 | return platform_driver_register(&ixp4xx_i2c_driver); | ||
165 | } | ||
166 | |||
167 | static void __exit ixp4xx_i2c_exit(void) | ||
168 | { | ||
169 | platform_driver_unregister(&ixp4xx_i2c_driver); | ||
170 | } | ||
171 | |||
172 | module_init(ixp4xx_i2c_init); | ||
173 | module_exit(ixp4xx_i2c_exit); | ||
174 | |||
175 | MODULE_DESCRIPTION("GPIO-based I2C adapter for IXP4xx systems"); | ||
176 | MODULE_LICENSE("GPL"); | ||
177 | MODULE_AUTHOR("Deepak Saxena <dsaxena@plexity.net>"); | ||
178 | |||