431bf99d26
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6: (51 commits) PM: Improve error code of pm_notifier_call_chain() PM: Add "RTC" to PM trace time stamps to avoid confusion PM / Suspend: Export suspend_set_ops, suspend_valid_only_mem PM / Suspend: Add .suspend_again() callback to suspend_ops PM / OPP: Introduce function to free cpufreq table ARM / shmobile: Return -EBUSY from A4LC power off if A3RV is active PM / Domains: Take .power_off() error code into account ARM / shmobile: Use genpd_queue_power_off_work() ARM / shmobile: Use pm_genpd_poweroff_unused() PM / Domains: Introduce function to power off all unused PM domains OMAP: PM: disable idle on suspend for GPIO and UART OMAP: PM: omap_device: add API to disable idle on suspend OMAP: PM: omap_device: add system PM methods for PM domain handling OMAP: PM: omap_device: conditionally use PM domain runtime helpers PM / Runtime: Add new helper function: pm_runtime_status_suspended() PM / Domains: Queue up power off work only if it is not pending PM / Domains: Improve handling of wakeup devices during system suspend PM / Domains: Do not restore all devices on power off error PM / Domains: Allow callbacks to execute all runtime PM helpers PM / Domains: Do not execute device callbacks under locks ...
138 lines
4.2 KiB
C
138 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 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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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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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, "Can't 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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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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