Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/cpupowerutils
[pandora-kernel.git] / arch / arm / mach-omap2 / common-board-devices.c
1 /*
2  * common-board-devices.c
3  *
4  * Copyright (C) 2011 CompuLab, Ltd.
5  * Author: Mike Rapoport <mike@compulab.co.il>
6  *
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.
10  *
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.
15  *
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
19  * 02110-1301 USA
20  *
21  */
22
23 #include <linux/gpio.h>
24 #include <linux/spi/spi.h>
25 #include <linux/spi/ads7846.h>
26
27 #include <plat/mcspi.h>
28 #include <plat/nand.h>
29
30 #include "common-board-devices.h"
31
32 #if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
33         defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
34 static struct omap2_mcspi_device_config ads7846_mcspi_config = {
35         .turbo_mode     = 0,
36         .single_channel = 1,    /* 0: slave, 1: master */
37 };
38
39 static struct ads7846_platform_data ads7846_config = {
40         .x_max                  = 0x0fff,
41         .y_max                  = 0x0fff,
42         .x_plate_ohms           = 180,
43         .pressure_max           = 255,
44         .debounce_max           = 10,
45         .debounce_tol           = 3,
46         .debounce_rep           = 1,
47         .gpio_pendown           = -EINVAL,
48         .keep_vref_on           = 1,
49 };
50
51 static struct spi_board_info ads7846_spi_board_info __initdata = {
52         .modalias               = "ads7846",
53         .bus_num                = -EINVAL,
54         .chip_select            = 0,
55         .max_speed_hz           = 1500000,
56         .controller_data        = &ads7846_mcspi_config,
57         .irq                    = -EINVAL,
58         .platform_data          = &ads7846_config,
59 };
60
61 void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
62                               struct ads7846_platform_data *board_pdata)
63 {
64         struct spi_board_info *spi_bi = &ads7846_spi_board_info;
65         int err;
66
67         if (board_pdata && board_pdata->get_pendown_state) {
68                 err = gpio_request_one(gpio_pendown, GPIOF_IN, "TSPenDown");
69                 if (err) {
70                         pr_err("Couldn't obtain gpio for TSPenDown: %d\n", err);
71                         return;
72                 }
73                 gpio_export(gpio_pendown, 0);
74
75                 if (gpio_debounce)
76                         gpio_set_debounce(gpio_pendown, gpio_debounce);
77         }
78
79         ads7846_config.gpio_pendown = gpio_pendown;
80
81         spi_bi->bus_num = bus_num;
82         spi_bi->irq     = OMAP_GPIO_IRQ(gpio_pendown);
83
84         if (board_pdata)
85                 spi_bi->platform_data = board_pdata;
86
87         spi_register_board_info(&ads7846_spi_board_info, 1);
88 }
89 #else
90 void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
91                               struct ads7846_platform_data *board_pdata)
92 {
93 }
94 #endif
95
96 #if defined(CONFIG_MTD_NAND_OMAP2) || defined(CONFIG_MTD_NAND_OMAP2_MODULE)
97 static struct omap_nand_platform_data nand_data;
98
99 void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
100                                  int nr_parts)
101 {
102         u8 cs = 0;
103         u8 nandcs = GPMC_CS_NUM + 1;
104
105         /* find out the chip-select on which NAND exists */
106         while (cs < GPMC_CS_NUM) {
107                 u32 ret = 0;
108                 ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
109
110                 if ((ret & 0xC00) == 0x800) {
111                         printk(KERN_INFO "Found NAND on CS%d\n", cs);
112                         if (nandcs > GPMC_CS_NUM)
113                                 nandcs = cs;
114                 }
115                 cs++;
116         }
117
118         if (nandcs > GPMC_CS_NUM) {
119                 printk(KERN_INFO "NAND: Unable to find configuration "
120                                  "in GPMC\n ");
121                 return;
122         }
123
124         if (nandcs < GPMC_CS_NUM) {
125                 nand_data.cs = nandcs;
126                 nand_data.parts = parts;
127                 nand_data.nr_parts = nr_parts;
128                 nand_data.devsize = options;
129
130                 printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
131                 if (gpmc_nand_init(&nand_data) < 0)
132                         printk(KERN_ERR "Unable to register NAND device\n");
133         }
134 }
135 #else
136 void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
137                                  int nr_parts)
138 {
139 }
140 #endif