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6ed87c5b66
Wakeup enable register offset initialized according to OMAP versions during device registration. Use this to avoid version checks. Starting with OMAP4, legacy registers should not be used in combination with the updated regsiters. Use wkup_en register consistently for all SoCs wherever applicable. Signed-off-by: Tarun Kanti DebBarma <tarun.kanti@ti.com> Signed-off-by: Charulatha V <charu@ti.com> Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Reviewed-by: Kevin Hilman <khilman@ti.com> Signed-off-by: Kevin Hilman <khilman@ti.com>
147 lines
4.6 KiB
C
147 lines
4.6 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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#include <plat/omap-pm.h>
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#include "powerdomain.h"
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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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struct powerdomain *pwrdm;
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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->get_context_loss_count = omap_pm_get_dev_context_loss_count;
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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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if (id == 1)
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/* non-wakeup GPIO pins for OMAP2 Bank1 */
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pdata->non_wakeup_gpios = 0xe203ffc0;
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else if (id == 2)
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/* non-wakeup GPIO pins for OMAP2 Bank2 */
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pdata->non_wakeup_gpios = 0x08700040;
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/* fall through */
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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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pdata->regs->ctrl = OMAP24XX_GPIO_CTRL;
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pdata->regs->wkup_en = OMAP24XX_GPIO_WAKE_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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pdata->regs->ctrl = OMAP4_GPIO_CTRL;
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pdata->regs->wkup_en = OMAP4_GPIO_IRQWAKEN0;
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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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pwrdm = omap_hwmod_get_pwrdm(oh);
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pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm);
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pdev = omap_device_build(name, id - 1, oh, pdata,
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sizeof(*pdata), NULL, 0, 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(pdev);
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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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