2 * common-board-devices.c
4 * Copyright (C) 2011 CompuLab, Ltd.
5 * Author: Mike Rapoport <mike@compulab.co.il>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * version 2 as published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
23 #include <linux/gpio.h>
24 #include <linux/spi/spi.h>
25 #include <linux/spi/ads7846.h>
27 #include <plat/mcspi.h>
28 #include <plat/nand.h>
30 #include "common-board-devices.h"
32 #if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
33 defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
34 static struct omap2_mcspi_device_config ads7846_mcspi_config
= {
38 static struct ads7846_platform_data ads7846_config
= {
46 .gpio_pendown
= -EINVAL
,
50 static struct spi_board_info ads7846_spi_board_info __initdata
= {
51 .modalias
= "ads7846",
54 .max_speed_hz
= 1500000,
55 .controller_data
= &ads7846_mcspi_config
,
57 .platform_data
= &ads7846_config
,
60 void __init
omap_ads7846_init(int bus_num
, int gpio_pendown
, int gpio_debounce
,
61 struct ads7846_platform_data
*board_pdata
)
63 struct spi_board_info
*spi_bi
= &ads7846_spi_board_info
;
66 err
= gpio_request_one(gpio_pendown
, GPIOF_IN
, "TSPenDown");
68 pr_err("Couldn't obtain gpio for TSPenDown: %d\n", err
);
73 gpio_set_debounce(gpio_pendown
, gpio_debounce
);
75 spi_bi
->bus_num
= bus_num
;
76 spi_bi
->irq
= gpio_to_irq(gpio_pendown
);
79 board_pdata
->gpio_pendown
= gpio_pendown
;
80 spi_bi
->platform_data
= board_pdata
;
81 if (board_pdata
->get_pendown_state
)
82 gpio_export(gpio_pendown
, 0);
84 ads7846_config
.gpio_pendown
= gpio_pendown
;
87 if (!board_pdata
|| (board_pdata
&& !board_pdata
->get_pendown_state
))
88 gpio_free(gpio_pendown
);
90 spi_register_board_info(&ads7846_spi_board_info
, 1);
93 void __init
omap_ads7846_init(int bus_num
, int gpio_pendown
, int gpio_debounce
,
94 struct ads7846_platform_data
*board_pdata
)
99 #if defined(CONFIG_MTD_NAND_OMAP2) || defined(CONFIG_MTD_NAND_OMAP2_MODULE)
100 static struct omap_nand_platform_data nand_data
;
102 void __init
omap_nand_flash_init(int options
, struct mtd_partition
*parts
,
106 u8 nandcs
= GPMC_CS_NUM
+ 1;
108 /* find out the chip-select on which NAND exists */
109 while (cs
< GPMC_CS_NUM
) {
111 ret
= gpmc_cs_read_reg(cs
, GPMC_CS_CONFIG1
);
113 if ((ret
& 0xC00) == 0x800) {
114 printk(KERN_INFO
"Found NAND on CS%d\n", cs
);
115 if (nandcs
> GPMC_CS_NUM
)
121 if (nandcs
> GPMC_CS_NUM
) {
122 printk(KERN_INFO
"NAND: Unable to find configuration "
127 if (nandcs
< GPMC_CS_NUM
) {
128 nand_data
.cs
= nandcs
;
129 nand_data
.parts
= parts
;
130 nand_data
.nr_parts
= nr_parts
;
131 nand_data
.devsize
= options
;
133 printk(KERN_INFO
"Registering NAND on CS%d\n", nandcs
);
134 if (gpmc_nand_init(&nand_data
) < 0)
135 printk(KERN_ERR
"Unable to register NAND device\n");
139 void __init
omap_nand_flash_init(int options
, struct mtd_partition
*parts
,