2 * linux/arch/arm/plat-omap/i2c.c
4 * Helper module for board specific I2C bus registration
6 * Copyright (C) 2007 Nokia Corporation.
8 * Contact: Jarkko Nikula <jarkko.nikula@nokia.com>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * version 2 as published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
26 #include <linux/kernel.h>
27 #include <linux/platform_device.h>
28 #include <linux/i2c.h>
31 #define OMAP_I2C_SIZE 0x3f
32 #define OMAP1_I2C_BASE 0xfffb3800
33 #define OMAP2_I2C_BASE1 0x48070000
34 #define OMAP2_I2C_BASE2 0x48072000
35 #define OMAP2_I2C_BASE3 0x48060000
37 static const char name
[] = "i2c_omap";
39 #define I2C_RESOURCE_BUILDER(base, irq) \
42 .end = (base) + OMAP_I2C_SIZE, \
43 .flags = IORESOURCE_MEM, \
47 .flags = IORESOURCE_IRQ, \
50 static struct resource i2c_resources
[][2] = {
51 { I2C_RESOURCE_BUILDER(0, 0) },
52 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
53 { I2C_RESOURCE_BUILDER(OMAP2_I2C_BASE2
, INT_24XX_I2C2_IRQ
) },
55 #if defined(CONFIG_ARCH_OMAP34XX)
56 { I2C_RESOURCE_BUILDER(OMAP2_I2C_BASE3
, INT_34XX_I2C3_IRQ
) },
60 #define I2C_DEV_BUILDER(bus_id, res, data) \
64 .num_resources = ARRAY_SIZE(res), \
67 .platform_data = (data), \
71 static u32 i2c_rate
[ARRAY_SIZE(i2c_resources
)];
72 static struct platform_device omap_i2c_devices
[] = {
73 I2C_DEV_BUILDER(1, i2c_resources
[0], &i2c_rate
[0]),
74 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
75 I2C_DEV_BUILDER(2, i2c_resources
[1], &i2c_rate
[1]),
77 #if defined(CONFIG_ARCH_OMAP34XX)
78 I2C_DEV_BUILDER(3, i2c_resources
[2], &i2c_rate
[2]),
82 static void __init
omap_i2c_mux_pins(int bus_id
)
84 /* TODO: Muxing for OMAP3 */
87 if (cpu_class_is_omap1()) {
88 omap_cfg_reg(I2C_SCL
);
89 omap_cfg_reg(I2C_SDA
);
90 } else if (cpu_is_omap24xx()) {
91 omap_cfg_reg(M19_24XX_I2C1_SCL
);
92 omap_cfg_reg(L15_24XX_I2C1_SDA
);
96 if (cpu_is_omap24xx()) {
97 omap_cfg_reg(J15_24XX_I2C2_SCL
);
98 omap_cfg_reg(H19_24XX_I2C2_SDA
);
104 int __init
omap_register_i2c_bus(int bus_id
, u32 clkrate
,
105 struct i2c_board_info
const *info
,
109 struct platform_device
*pdev
;
110 struct resource
*res
;
111 resource_size_t base
, irq
;
113 if (cpu_class_is_omap1())
115 else if (cpu_is_omap24xx())
117 else if (cpu_is_omap34xx())
120 BUG_ON(bus_id
< 1 || bus_id
> ports
);
123 err
= i2c_register_board_info(bus_id
, info
, len
);
128 pdev
= &omap_i2c_devices
[bus_id
- 1];
129 *(u32
*)pdev
->dev
.platform_data
= clkrate
;
132 res
= pdev
->resource
;
133 if (cpu_class_is_omap1()) {
134 base
= OMAP1_I2C_BASE
;
137 base
= OMAP2_I2C_BASE1
;
138 irq
= INT_24XX_I2C1_IRQ
;
141 res
[0].end
= base
+ OMAP_I2C_SIZE
;
145 omap_i2c_mux_pins(bus_id
);
146 return platform_device_register(pdev
);