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