--- /dev/null
+/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/log2.h>
+
+#include <linux/mfd/pm8xxx/core.h>
+#include <linux/input/pmic8xxx-pwrkey.h>
+
+#define PON_CNTL_1 0x1C
+#define PON_CNTL_PULL_UP BIT(7)
+#define PON_CNTL_TRIG_DELAY_MASK (0x7)
+
+/**
+ * struct pmic8xxx_pwrkey - pmic8xxx pwrkey information
+ * @key_press_irq: key press irq number
+ */
+struct pmic8xxx_pwrkey {
+ struct input_dev *pwr;
+ int key_press_irq;
+};
+
+static irqreturn_t pwrkey_press_irq(int irq, void *_pwrkey)
+{
+ struct pmic8xxx_pwrkey *pwrkey = _pwrkey;
+
+ input_report_key(pwrkey->pwr, KEY_POWER, 1);
+ input_sync(pwrkey->pwr);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pwrkey_release_irq(int irq, void *_pwrkey)
+{
+ struct pmic8xxx_pwrkey *pwrkey = _pwrkey;
+
+ input_report_key(pwrkey->pwr, KEY_POWER, 0);
+ input_sync(pwrkey->pwr);
+
+ return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int pmic8xxx_pwrkey_suspend(struct device *dev)
+{
+ struct pmic8xxx_pwrkey *pwrkey = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ enable_irq_wake(pwrkey->key_press_irq);
+
+ return 0;
+}
+
+static int pmic8xxx_pwrkey_resume(struct device *dev)
+{
+ struct pmic8xxx_pwrkey *pwrkey = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ disable_irq_wake(pwrkey->key_press_irq);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(pm8xxx_pwr_key_pm_ops,
+ pmic8xxx_pwrkey_suspend, pmic8xxx_pwrkey_resume);
+
+static int __devinit pmic8xxx_pwrkey_probe(struct platform_device *pdev)
+{
+ struct input_dev *pwr;
+ int key_release_irq = platform_get_irq(pdev, 0);
+ int key_press_irq = platform_get_irq(pdev, 1);
+ int err;
+ unsigned int delay;
+ u8 pon_cntl;
+ struct pmic8xxx_pwrkey *pwrkey;
+ const struct pm8xxx_pwrkey_platform_data *pdata = mfd_get_data(pdev);
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "power key platform data not supplied\n");
+ return -EINVAL;
+ }
+
+ if (pdata->kpd_trigger_delay_us > 62500) {
+ dev_err(&pdev->dev, "invalid power key trigger delay\n");
+ return -EINVAL;
+ }
+
+ pwrkey = kzalloc(sizeof(*pwrkey), GFP_KERNEL);
+ if (!pwrkey)
+ return -ENOMEM;
+
+ pwr = input_allocate_device();
+ if (!pwr) {
+ dev_dbg(&pdev->dev, "Can't allocate power button\n");
+ err = -ENOMEM;
+ goto free_pwrkey;
+ }
+
+ input_set_capability(pwr, EV_KEY, KEY_POWER);
+
+ pwr->name = "pmic8xxx_pwrkey";
+ pwr->phys = "pmic8xxx_pwrkey/input0";
+ pwr->dev.parent = &pdev->dev;
+
+ delay = (pdata->kpd_trigger_delay_us << 10) / USEC_PER_SEC;
+ delay = 1 + ilog2(delay);
+
+ err = pm8xxx_readb(pdev->dev.parent, PON_CNTL_1, &pon_cntl);
+ if (err < 0) {
+ dev_err(&pdev->dev, "failed reading PON_CNTL_1 err=%d\n", err);
+ goto free_input_dev;
+ }
+
+ pon_cntl &= ~PON_CNTL_TRIG_DELAY_MASK;
+ pon_cntl |= (delay & PON_CNTL_TRIG_DELAY_MASK);
+ if (pdata->pull_up)
+ pon_cntl |= PON_CNTL_PULL_UP;
+ else
+ pon_cntl &= ~PON_CNTL_PULL_UP;
+
+ err = pm8xxx_writeb(pdev->dev.parent, PON_CNTL_1, pon_cntl);
+ if (err < 0) {
+ dev_err(&pdev->dev, "failed writing PON_CNTL_1 err=%d\n", err);
+ goto free_input_dev;
+ }
+
+ err = input_register_device(pwr);
+ if (err) {
+ dev_dbg(&pdev->dev, "Can't register power key: %d\n", err);
+ goto free_input_dev;
+ }
+
+ pwrkey->key_press_irq = key_press_irq;
+ pwrkey->pwr = pwr;
+
+ platform_set_drvdata(pdev, pwrkey);
+
+ err = request_irq(key_press_irq, pwrkey_press_irq,
+ IRQF_TRIGGER_RISING, "pmic8xxx_pwrkey_press", pwrkey);
+ if (err < 0) {
+ dev_dbg(&pdev->dev, "Can't get %d IRQ for pwrkey: %d\n",
+ key_press_irq, err);
+ goto unreg_input_dev;
+ }
+
+ err = request_irq(key_release_irq, pwrkey_release_irq,
+ IRQF_TRIGGER_RISING, "pmic8xxx_pwrkey_release", pwrkey);
+ if (err < 0) {
+ dev_dbg(&pdev->dev, "Can't get %d IRQ for pwrkey: %d\n",
+ key_release_irq, err);
+
+ goto free_press_irq;
+ }
+
+ device_init_wakeup(&pdev->dev, pdata->wakeup);
+
+ return 0;
+
+free_press_irq:
+ free_irq(key_press_irq, NULL);
+unreg_input_dev:
+ platform_set_drvdata(pdev, NULL);
+ input_unregister_device(pwr);
+ pwr = NULL;
+free_input_dev:
+ input_free_device(pwr);
+free_pwrkey:
+ kfree(pwrkey);
+ return err;
+}
+
+static int __devexit pmic8xxx_pwrkey_remove(struct platform_device *pdev)
+{
+ struct pmic8xxx_pwrkey *pwrkey = platform_get_drvdata(pdev);
+ int key_release_irq = platform_get_irq(pdev, 0);
+ int key_press_irq = platform_get_irq(pdev, 1);
+
+ device_init_wakeup(&pdev->dev, 0);
+
+ free_irq(key_press_irq, pwrkey);
+ free_irq(key_release_irq, pwrkey);
+ input_unregister_device(pwrkey->pwr);
+ platform_set_drvdata(pdev, NULL);
+ kfree(pwrkey);
+
+ return 0;
+}
+
+static struct platform_driver pmic8xxx_pwrkey_driver = {
+ .probe = pmic8xxx_pwrkey_probe,
+ .remove = __devexit_p(pmic8xxx_pwrkey_remove),
+ .driver = {
+ .name = PM8XXX_PWRKEY_DEV_NAME,
+ .owner = THIS_MODULE,
+ .pm = &pm8xxx_pwr_key_pm_ops,
+ },
+};
+
+static int __init pmic8xxx_pwrkey_init(void)
+{
+ return platform_driver_register(&pmic8xxx_pwrkey_driver);
+}
+module_init(pmic8xxx_pwrkey_init);
+
+static void __exit pmic8xxx_pwrkey_exit(void)
+{
+ platform_driver_unregister(&pmic8xxx_pwrkey_driver);
+}
+module_exit(pmic8xxx_pwrkey_exit);
+
+MODULE_ALIAS("platform:pmic8xxx_pwrkey");
+MODULE_DESCRIPTION("PMIC8XXX Power Key driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Trilok Soni <tsoni@codeaurora.org>");
projects / openwrt / staging / blogic.git / commitdiff