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ARM: OMAP5/DRA7: hwmod: add ADDR_TYPE_RT to bb2d address flags
[android-sdk/kernel-video.git] / arch / arm / mach-omap2 / gpio.c
1 /*
2  * OMAP2+ specific gpio initialization
3  *
4  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
5  *
6  * Author:
7  *      Charulatha V <charu@ti.com>
8  *
9  * This program is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU General Public License as
11  * published by the Free Software Foundation version 2.
12  *
13  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
14  * kind, whether express or implied; without even the implied warranty
15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  */
19 #include <linux/gpio.h>
20 #include <linux/err.h>
21 #include <linux/slab.h>
22 #include <linux/interrupt.h>
23 #include <linux/of.h>
24 #include <linux/platform_data/gpio-omap.h>
26 #include "omap_hwmod.h"
27 #include "omap_device.h"
28 #include "omap-pm.h"
30 #include "powerdomain.h"
32 static int __init omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused)
33 {
34         struct platform_device *pdev;
35         struct omap_gpio_platform_data *pdata;
36         struct omap_gpio_dev_attr *dev_attr;
37         char *name = "omap_gpio";
38         int id;
39         struct powerdomain *pwrdm;
41         /*
42          * extract the device id from name field available in the
43          * hwmod database and use the same for constructing ids for
44          * gpio devices.
45          * CAUTION: Make sure the name in the hwmod database does
46          * not change. If changed, make corresponding change here
47          * or make use of static variable mechanism to handle this.
48          */
49         sscanf(oh->name, "gpio%d", &id);
51         pdata = kzalloc(sizeof(struct omap_gpio_platform_data), GFP_KERNEL);
52         if (!pdata) {
53                 pr_err("gpio%d: Memory allocation failed\n", id);
54                 return -ENOMEM;
55         }
57         dev_attr = (struct omap_gpio_dev_attr *)oh->dev_attr;
58         pdata->bank_width = dev_attr->bank_width;
59         pdata->dbck_flag = dev_attr->dbck_flag;
60         pdata->get_context_loss_count = omap_pm_get_dev_context_loss_count;
61         pdata->regs = kzalloc(sizeof(struct omap_gpio_reg_offs), GFP_KERNEL);
62         if (!pdata->regs) {
63                 pr_err("gpio%d: Memory allocation failed\n", id);
64                 kfree(pdata);
65                 return -ENOMEM;
66         }
68         switch (oh->class->rev) {
69         case 0:
70                 if (id == 1)
71                         /* non-wakeup GPIO pins for OMAP2 Bank1 */
72                         pdata->non_wakeup_gpios = 0xe203ffc0;
73                 else if (id == 2)
74                         /* non-wakeup GPIO pins for OMAP2 Bank2 */
75                         pdata->non_wakeup_gpios = 0x08700040;
76                 /* fall through */
78         case 1:
79                 pdata->regs->revision = OMAP24XX_GPIO_REVISION;
80                 pdata->regs->direction = OMAP24XX_GPIO_OE;
81                 pdata->regs->datain = OMAP24XX_GPIO_DATAIN;
82                 pdata->regs->dataout = OMAP24XX_GPIO_DATAOUT;
83                 pdata->regs->set_dataout = OMAP24XX_GPIO_SETDATAOUT;
84                 pdata->regs->clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT;
85                 pdata->regs->irqstatus = OMAP24XX_GPIO_IRQSTATUS1;
86                 pdata->regs->irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2;
87                 pdata->regs->irqenable = OMAP24XX_GPIO_IRQENABLE1;
88                 pdata->regs->irqenable2 = OMAP24XX_GPIO_IRQENABLE2;
89                 pdata->regs->set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1;
90                 pdata->regs->clr_irqenable = OMAP24XX_GPIO_CLEARIRQENABLE1;
91                 pdata->regs->debounce = OMAP24XX_GPIO_DEBOUNCE_VAL;
92                 pdata->regs->debounce_en = OMAP24XX_GPIO_DEBOUNCE_EN;
93                 pdata->regs->ctrl = OMAP24XX_GPIO_CTRL;
94                 pdata->regs->wkup_en = OMAP24XX_GPIO_WAKE_EN;
95                 pdata->regs->leveldetect0 = OMAP24XX_GPIO_LEVELDETECT0;
96                 pdata->regs->leveldetect1 = OMAP24XX_GPIO_LEVELDETECT1;
97                 pdata->regs->risingdetect = OMAP24XX_GPIO_RISINGDETECT;
98                 pdata->regs->fallingdetect = OMAP24XX_GPIO_FALLINGDETECT;
99                 break;
100         case 2:
101                 pdata->regs->revision = OMAP4_GPIO_REVISION;
102                 pdata->regs->direction = OMAP4_GPIO_OE;
103                 pdata->regs->datain = OMAP4_GPIO_DATAIN;
104                 pdata->regs->dataout = OMAP4_GPIO_DATAOUT;
105                 pdata->regs->set_dataout = OMAP4_GPIO_SETDATAOUT;
106                 pdata->regs->clr_dataout = OMAP4_GPIO_CLEARDATAOUT;
107                 pdata->regs->irqstatus_raw0 = OMAP4_GPIO_IRQSTATUSRAW0;
108                 pdata->regs->irqstatus_raw1 = OMAP4_GPIO_IRQSTATUSRAW1;
109                 pdata->regs->irqstatus = OMAP4_GPIO_IRQSTATUS0;
110                 pdata->regs->irqstatus2 = OMAP4_GPIO_IRQSTATUS1;
111                 pdata->regs->irqenable = OMAP4_GPIO_IRQSTATUSSET0;
112                 pdata->regs->irqenable2 = OMAP4_GPIO_IRQSTATUSSET1;
113                 pdata->regs->set_irqenable = OMAP4_GPIO_IRQSTATUSSET0;
114                 pdata->regs->clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0;
115                 pdata->regs->debounce = OMAP4_GPIO_DEBOUNCINGTIME;
116                 pdata->regs->debounce_en = OMAP4_GPIO_DEBOUNCENABLE;
117                 pdata->regs->ctrl = OMAP4_GPIO_CTRL;
118                 pdata->regs->wkup_en = OMAP4_GPIO_IRQWAKEN0;
119                 pdata->regs->leveldetect0 = OMAP4_GPIO_LEVELDETECT0;
120                 pdata->regs->leveldetect1 = OMAP4_GPIO_LEVELDETECT1;
121                 pdata->regs->risingdetect = OMAP4_GPIO_RISINGDETECT;
122                 pdata->regs->fallingdetect = OMAP4_GPIO_FALLINGDETECT;
123                 break;
124         default:
125                 WARN(1, "Invalid gpio bank_type\n");
126                 kfree(pdata->regs);
127                 kfree(pdata);
128                 return -EINVAL;
129         }
131         pwrdm = omap_hwmod_get_pwrdm(oh);
132         pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm);
134         pdev = omap_device_build(name, id - 1, oh, pdata,
135                                 sizeof(*pdata), NULL, 0, false);
136         kfree(pdata);
138         if (IS_ERR(pdev)) {
139                 WARN(1, "Can't build omap_device for %s:%s.\n",
140                                         name, oh->name);
141                 return PTR_ERR(pdev);
142         }
144         return 0;
147 /*
148  * gpio_init needs to be done before
149  * machine_init functions access gpio APIs.
150  * Hence gpio_init is a postcore_initcall.
151  */
152 static int __init omap2_gpio_init(void)
154         /* If dtb is there, the devices will be created dynamically */
155         if (of_have_populated_dt())
156                 return -ENODEV;
158         return omap_hwmod_for_each_by_class("gpio", omap2_gpio_dev_init, NULL);
160 postcore_initcall(omap2_gpio_init);