f547170fe7
Use omap_device_build() API to do platform_device_register of GPIO devices. For OMAP2+ chips, the device specific data defined in the centralized hwmod database will be used. gpio_init needs to be done before machine_init functions access gpio APIs. Hence gpio_init is made as a postcore_initcall. Signed-off-by: Charulatha V <charu@ti.com> Acked-by: Benoit Cousson <b-cousson@ti.com> Reviewed-by: Basak, Partha <p-basak2@ti.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
/*
|
|
* OMAP2+ specific gpio initialization
|
|
*
|
|
* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
|
|
*
|
|
* Author:
|
|
* Charulatha V <charu@ti.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation version 2.
|
|
*
|
|
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
|
|
* kind, whether express or implied; without even the implied warranty
|
|
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/gpio.h>
|
|
#include <linux/err.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <plat/omap_hwmod.h>
|
|
#include <plat/omap_device.h>
|
|
|
|
static struct omap_device_pm_latency omap_gpio_latency[] = {
|
|
[0] = {
|
|
.deactivate_func = omap_device_idle_hwmods,
|
|
.activate_func = omap_device_enable_hwmods,
|
|
.flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
|
|
},
|
|
};
|
|
|
|
static int omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused)
|
|
{
|
|
struct omap_device *od;
|
|
struct omap_gpio_platform_data *pdata;
|
|
struct omap_gpio_dev_attr *dev_attr;
|
|
char *name = "omap_gpio";
|
|
int id;
|
|
|
|
/*
|
|
* extract the device id from name field available in the
|
|
* hwmod database and use the same for constructing ids for
|
|
* gpio devices.
|
|
* CAUTION: Make sure the name in the hwmod database does
|
|
* not change. If changed, make corresponding change here
|
|
* or make use of static variable mechanism to handle this.
|
|
*/
|
|
sscanf(oh->name, "gpio%d", &id);
|
|
|
|
pdata = kzalloc(sizeof(struct omap_gpio_platform_data), GFP_KERNEL);
|
|
if (!pdata) {
|
|
pr_err("gpio%d: Memory allocation failed\n", id);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
dev_attr = (struct omap_gpio_dev_attr *)oh->dev_attr;
|
|
pdata->bank_width = dev_attr->bank_width;
|
|
pdata->dbck_flag = dev_attr->dbck_flag;
|
|
pdata->virtual_irq_start = IH_GPIO_BASE + 32 * (id - 1);
|
|
|
|
switch (oh->class->rev) {
|
|
case 0:
|
|
case 1:
|
|
pdata->bank_type = METHOD_GPIO_24XX;
|
|
break;
|
|
case 2:
|
|
pdata->bank_type = METHOD_GPIO_44XX;
|
|
break;
|
|
default:
|
|
WARN(1, "Invalid gpio bank_type\n");
|
|
kfree(pdata);
|
|
return -EINVAL;
|
|
}
|
|
|
|
od = omap_device_build(name, id - 1, oh, pdata,
|
|
sizeof(*pdata), omap_gpio_latency,
|
|
ARRAY_SIZE(omap_gpio_latency),
|
|
false);
|
|
kfree(pdata);
|
|
|
|
if (IS_ERR(od)) {
|
|
WARN(1, "Cant build omap_device for %s:%s.\n",
|
|
name, oh->name);
|
|
return PTR_ERR(od);
|
|
}
|
|
|
|
gpio_bank_count++;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* gpio_init needs to be done before
|
|
* machine_init functions access gpio APIs.
|
|
* Hence gpio_init is a postcore_initcall.
|
|
*/
|
|
static int __init omap2_gpio_init(void)
|
|
{
|
|
return omap_hwmod_for_each_by_class("gpio", omap2_gpio_dev_init,
|
|
NULL);
|
|
}
|
|
postcore_initcall(omap2_gpio_init);
|