Merge branch 'master' of git://dev.phrozen.org/mips-next into mips-for-linux-next
[firefly-linux-kernel-4.4.55.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 };
37
38 static struct ads7846_platform_data ads7846_config = {
39         .x_max                  = 0x0fff,
40         .y_max                  = 0x0fff,
41         .x_plate_ohms           = 180,
42         .pressure_max           = 255,
43         .debounce_max           = 10,
44         .debounce_tol           = 3,
45         .debounce_rep           = 1,
46         .gpio_pendown           = -EINVAL,
47         .keep_vref_on           = 1,
48 };
49
50 static struct spi_board_info ads7846_spi_board_info __initdata = {
51         .modalias               = "ads7846",
52         .bus_num                = -EINVAL,
53         .chip_select            = 0,
54         .max_speed_hz           = 1500000,
55         .controller_data        = &ads7846_mcspi_config,
56         .irq                    = -EINVAL,
57         .platform_data          = &ads7846_config,
58 };
59
60 void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
61                               struct ads7846_platform_data *board_pdata)
62 {
63         struct spi_board_info *spi_bi = &ads7846_spi_board_info;
64         int err;
65
66         err = gpio_request_one(gpio_pendown, GPIOF_IN, "TSPenDown");
67         if (err) {
68                 pr_err("Couldn't obtain gpio for TSPenDown: %d\n", err);
69                 return;
70         }
71
72         if (gpio_debounce)
73                 gpio_set_debounce(gpio_pendown, gpio_debounce);
74
75         spi_bi->bus_num = bus_num;
76         spi_bi->irq     = gpio_to_irq(gpio_pendown);
77
78         if (board_pdata) {
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);
83         } else {
84                 ads7846_config.gpio_pendown = gpio_pendown;
85         }
86
87         if (!board_pdata || (board_pdata && !board_pdata->get_pendown_state))
88                 gpio_free(gpio_pendown);
89
90         spi_register_board_info(&ads7846_spi_board_info, 1);
91 }
92 #else
93 void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
94                               struct ads7846_platform_data *board_pdata)
95 {
96 }
97 #endif
98
99 #if defined(CONFIG_MTD_NAND_OMAP2) || defined(CONFIG_MTD_NAND_OMAP2_MODULE)
100 static struct omap_nand_platform_data nand_data;
101
102 void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
103                                  int nr_parts)
104 {
105         u8 cs = 0;
106         u8 nandcs = GPMC_CS_NUM + 1;
107
108         /* find out the chip-select on which NAND exists */
109         while (cs < GPMC_CS_NUM) {
110                 u32 ret = 0;
111                 ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
112
113                 if ((ret & 0xC00) == 0x800) {
114                         printk(KERN_INFO "Found NAND on CS%d\n", cs);
115                         if (nandcs > GPMC_CS_NUM)
116                                 nandcs = cs;
117                 }
118                 cs++;
119         }
120
121         if (nandcs > GPMC_CS_NUM) {
122                 printk(KERN_INFO "NAND: Unable to find configuration "
123                                  "in GPMC\n ");
124                 return;
125         }
126
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;
132
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");
136         }
137 }
138 #else
139 void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
140                                  int nr_parts)
141 {
142 }
143 #endif