3528c58eb9
All of the device init and device driver interaction with omap_device is done using platform_device pointers. To make this more explicit, have omap_device return a platform_device pointer instead of an omap_device pointer. All current users of the omap_device pointer were only using it to get at the platform_device pointer or struct device pointer, so fixing all of the users was trivial. This also makes it more difficult for device init code to directly access members of struct omap_device, and allows for easier changing of omap_device internals. Cc: Paul Walmsley <paul@pwsan.com> Signed-off-by: Kevin Hilman <khilman@ti.com>
139 lines
4.2 KiB
C
139 lines
4.2 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 platform_device *pdev;
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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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pdata->regs = kzalloc(sizeof(struct omap_gpio_reg_offs), 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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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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pdata->regs->revision = OMAP24XX_GPIO_REVISION;
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pdata->regs->direction = OMAP24XX_GPIO_OE;
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pdata->regs->datain = OMAP24XX_GPIO_DATAIN;
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pdata->regs->dataout = OMAP24XX_GPIO_DATAOUT;
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pdata->regs->set_dataout = OMAP24XX_GPIO_SETDATAOUT;
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pdata->regs->clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT;
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pdata->regs->irqstatus = OMAP24XX_GPIO_IRQSTATUS1;
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pdata->regs->irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2;
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pdata->regs->irqenable = OMAP24XX_GPIO_IRQENABLE1;
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pdata->regs->set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1;
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pdata->regs->clr_irqenable = OMAP24XX_GPIO_CLEARIRQENABLE1;
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pdata->regs->debounce = OMAP24XX_GPIO_DEBOUNCE_VAL;
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pdata->regs->debounce_en = OMAP24XX_GPIO_DEBOUNCE_EN;
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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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pdata->regs->revision = OMAP4_GPIO_REVISION;
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pdata->regs->direction = OMAP4_GPIO_OE;
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pdata->regs->datain = OMAP4_GPIO_DATAIN;
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pdata->regs->dataout = OMAP4_GPIO_DATAOUT;
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pdata->regs->set_dataout = OMAP4_GPIO_SETDATAOUT;
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pdata->regs->clr_dataout = OMAP4_GPIO_CLEARDATAOUT;
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pdata->regs->irqstatus = OMAP4_GPIO_IRQSTATUS0;
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pdata->regs->irqstatus2 = OMAP4_GPIO_IRQSTATUS1;
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pdata->regs->irqenable = OMAP4_GPIO_IRQSTATUSSET0;
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pdata->regs->set_irqenable = OMAP4_GPIO_IRQSTATUSSET0;
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pdata->regs->clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0;
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pdata->regs->debounce = OMAP4_GPIO_DEBOUNCINGTIME;
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pdata->regs->debounce_en = OMAP4_GPIO_DEBOUNCENABLE;
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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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pdev = 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(pdev)) {
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WARN(1, "Can't build omap_device for %s:%s.\n",
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name, oh->name);
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return PTR_ERR(pdev);
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}
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omap_device_disable_idle_on_suspend(od);
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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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