/* * 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 <linux/of.h> #include <linux/platform_data/gpio-omap.h> #include "soc.h" #include "omap_hwmod.h" #include "omap_device.h" #include "omap-pm.h" #include "powerdomain.h" static int __init omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused) { struct platform_device *pdev; struct omap_gpio_platform_data *pdata; struct omap_gpio_dev_attr *dev_attr; char *name = "omap_gpio"; int id; struct powerdomain *pwrdm; /* * 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->get_context_loss_count = omap_pm_get_dev_context_loss_count; pdata->regs = kzalloc(sizeof(struct omap_gpio_reg_offs), GFP_KERNEL); if (!pdata->regs) { pr_err("gpio%d: Memory allocation failed\n", id); kfree(pdata); return -ENOMEM; } switch (oh->class->rev) { case 0: if (id == 1) /* non-wakeup GPIO pins for OMAP2 Bank1 */ pdata->non_wakeup_gpios = 0xe203ffc0; else if (id == 2) /* non-wakeup GPIO pins for OMAP2 Bank2 */ pdata->non_wakeup_gpios = 0x08700040; /* fall through */ case 1: pdata->regs->revision = OMAP24XX_GPIO_REVISION; pdata->regs->direction = OMAP24XX_GPIO_OE; pdata->regs->datain = OMAP24XX_GPIO_DATAIN; pdata->regs->dataout = OMAP24XX_GPIO_DATAOUT; pdata->regs->set_dataout = OMAP24XX_GPIO_SETDATAOUT; pdata->regs->clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT; pdata->regs->irqstatus = OMAP24XX_GPIO_IRQSTATUS1; pdata->regs->irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2; pdata->regs->irqenable = OMAP24XX_GPIO_IRQENABLE1; pdata->regs->irqenable2 = OMAP24XX_GPIO_IRQENABLE2; pdata->regs->set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1; pdata->regs->clr_irqenable = OMAP24XX_GPIO_CLEARIRQENABLE1; pdata->regs->debounce = OMAP24XX_GPIO_DEBOUNCE_VAL; pdata->regs->debounce_en = OMAP24XX_GPIO_DEBOUNCE_EN; pdata->regs->ctrl = OMAP24XX_GPIO_CTRL; pdata->regs->wkup_en = OMAP24XX_GPIO_WAKE_EN; pdata->regs->leveldetect0 = OMAP24XX_GPIO_LEVELDETECT0; pdata->regs->leveldetect1 = OMAP24XX_GPIO_LEVELDETECT1; pdata->regs->risingdetect = OMAP24XX_GPIO_RISINGDETECT; pdata->regs->fallingdetect = OMAP24XX_GPIO_FALLINGDETECT; break; case 2: pdata->regs->revision = OMAP4_GPIO_REVISION; pdata->regs->direction = OMAP4_GPIO_OE; pdata->regs->datain = OMAP4_GPIO_DATAIN; pdata->regs->dataout = OMAP4_GPIO_DATAOUT; pdata->regs->set_dataout = OMAP4_GPIO_SETDATAOUT; pdata->regs->clr_dataout = OMAP4_GPIO_CLEARDATAOUT; pdata->regs->irqstatus_raw0 = OMAP4_GPIO_IRQSTATUSRAW0; pdata->regs->irqstatus_raw1 = OMAP4_GPIO_IRQSTATUSRAW1; pdata->regs->irqstatus = OMAP4_GPIO_IRQSTATUS0; pdata->regs->irqstatus2 = OMAP4_GPIO_IRQSTATUS1; pdata->regs->irqenable = OMAP4_GPIO_IRQSTATUSSET0; pdata->regs->irqenable2 = OMAP4_GPIO_IRQSTATUSSET1; pdata->regs->set_irqenable = OMAP4_GPIO_IRQSTATUSSET0; pdata->regs->clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0; pdata->regs->debounce = OMAP4_GPIO_DEBOUNCINGTIME; pdata->regs->debounce_en = OMAP4_GPIO_DEBOUNCENABLE; pdata->regs->ctrl = OMAP4_GPIO_CTRL; pdata->regs->wkup_en = OMAP4_GPIO_IRQWAKEN0; pdata->regs->leveldetect0 = OMAP4_GPIO_LEVELDETECT0; pdata->regs->leveldetect1 = OMAP4_GPIO_LEVELDETECT1; pdata->regs->risingdetect = OMAP4_GPIO_RISINGDETECT; pdata->regs->fallingdetect = OMAP4_GPIO_FALLINGDETECT; break; default: WARN(1, "Invalid gpio bank_type\n"); kfree(pdata->regs); kfree(pdata); return -EINVAL; } pwrdm = omap_hwmod_get_pwrdm(oh); pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm); pdev = omap_device_build(name, id - 1, oh, pdata, sizeof(*pdata)); kfree(pdata); if (IS_ERR(pdev)) { WARN(1, "Can't build omap_device for %s:%s.\n", name, oh->name); return PTR_ERR(pdev); } return 0; } /* * gpio_init needs to be done before * machine_init functions access gpio APIs. * Hence gpio_init is a omap_postcore_initcall. */ static int __init omap2_gpio_init(void) { /* If dtb is there, the devices will be created dynamically */ if (of_have_populated_dt()) return -ENODEV; return omap_hwmod_for_each_by_class("gpio", omap2_gpio_dev_init, NULL); } omap_postcore_initcall(omap2_gpio_init);