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527df5fae9
This reverts commit ca3b3faf9b.
There was a plan to place ab8500_irq_get_virq() calls in each AB8500
child device prior to requesting an IRQ, but as we're no longer using
Device Tree to collect our IRQ numbers, it's actually better to allow
the core to do this during device registration time. So the IRQ number
we pull from its resource has already been converted to a virtual IRQ.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
156 lines
3.8 KiB
C
156 lines
3.8 KiB
C
/*
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* Copyright (C) ST-Ericsson SA 2010
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*
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* License Terms: GNU General Public License v2
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* Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
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*
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* AB8500 Power-On Key handler
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/mfd/abx500/ab8500.h>
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#include <linux/of.h>
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#include <linux/slab.h>
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/**
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* struct ab8500_ponkey - ab8500 ponkey information
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* @input_dev: pointer to input device
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* @ab8500: ab8500 parent
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* @irq_dbf: irq number for falling transition
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* @irq_dbr: irq number for rising transition
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*/
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struct ab8500_ponkey {
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struct input_dev *idev;
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struct ab8500 *ab8500;
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int irq_dbf;
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int irq_dbr;
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};
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/* AB8500 gives us an interrupt when ONKEY is held */
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static irqreturn_t ab8500_ponkey_handler(int irq, void *data)
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{
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struct ab8500_ponkey *ponkey = data;
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if (irq == ponkey->irq_dbf)
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input_report_key(ponkey->idev, KEY_POWER, true);
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else if (irq == ponkey->irq_dbr)
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input_report_key(ponkey->idev, KEY_POWER, false);
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input_sync(ponkey->idev);
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return IRQ_HANDLED;
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}
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static int __devinit ab8500_ponkey_probe(struct platform_device *pdev)
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{
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struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
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struct ab8500_ponkey *ponkey;
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struct input_dev *input;
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int irq_dbf, irq_dbr;
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int error;
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irq_dbf = platform_get_irq_byname(pdev, "ONKEY_DBF");
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if (irq_dbf < 0) {
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dev_err(&pdev->dev, "No IRQ for ONKEY_DBF, error=%d\n", irq_dbf);
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return irq_dbf;
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}
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irq_dbr = platform_get_irq_byname(pdev, "ONKEY_DBR");
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if (irq_dbr < 0) {
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dev_err(&pdev->dev, "No IRQ for ONKEY_DBR, error=%d\n", irq_dbr);
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return irq_dbr;
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}
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ponkey = kzalloc(sizeof(struct ab8500_ponkey), GFP_KERNEL);
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input = input_allocate_device();
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if (!ponkey || !input) {
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error = -ENOMEM;
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goto err_free_mem;
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}
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ponkey->idev = input;
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ponkey->ab8500 = ab8500;
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ponkey->irq_dbf = irq_dbf;
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ponkey->irq_dbr = irq_dbr;
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input->name = "AB8500 POn(PowerOn) Key";
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input->dev.parent = &pdev->dev;
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input_set_capability(input, EV_KEY, KEY_POWER);
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error = request_any_context_irq(ponkey->irq_dbf, ab8500_ponkey_handler,
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0, "ab8500-ponkey-dbf", ponkey);
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if (error < 0) {
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dev_err(ab8500->dev, "Failed to request dbf IRQ#%d: %d\n",
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ponkey->irq_dbf, error);
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goto err_free_mem;
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}
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error = request_any_context_irq(ponkey->irq_dbr, ab8500_ponkey_handler,
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0, "ab8500-ponkey-dbr", ponkey);
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if (error < 0) {
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dev_err(ab8500->dev, "Failed to request dbr IRQ#%d: %d\n",
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ponkey->irq_dbr, error);
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goto err_free_dbf_irq;
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}
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error = input_register_device(ponkey->idev);
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if (error) {
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dev_err(ab8500->dev, "Can't register input device: %d\n", error);
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goto err_free_dbr_irq;
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}
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platform_set_drvdata(pdev, ponkey);
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return 0;
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err_free_dbr_irq:
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free_irq(ponkey->irq_dbr, ponkey);
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err_free_dbf_irq:
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free_irq(ponkey->irq_dbf, ponkey);
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err_free_mem:
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input_free_device(input);
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kfree(ponkey);
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return error;
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}
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static int __devexit ab8500_ponkey_remove(struct platform_device *pdev)
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{
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struct ab8500_ponkey *ponkey = platform_get_drvdata(pdev);
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free_irq(ponkey->irq_dbf, ponkey);
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free_irq(ponkey->irq_dbr, ponkey);
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input_unregister_device(ponkey->idev);
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kfree(ponkey);
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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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#ifdef CONFIG_OF
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static const struct of_device_id ab8500_ponkey_match[] = {
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{ .compatible = "stericsson,ab8500-ponkey", },
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{}
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};
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#endif
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static struct platform_driver ab8500_ponkey_driver = {
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.driver = {
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.name = "ab8500-poweron-key",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(ab8500_ponkey_match),
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},
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.probe = ab8500_ponkey_probe,
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.remove = __devexit_p(ab8500_ponkey_remove),
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};
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module_platform_driver(ab8500_ponkey_driver);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
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MODULE_DESCRIPTION("ST-Ericsson AB8500 Power-ON(Pon) Key driver");
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