Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / input / misc / twl4030-pwrbutton.c

diff --git a/kernel/drivers/input/misc/twl4030-pwrbutton.c b/kernel/drivers/input/misc/twl4030-pwrbutton.c
new file mode 100644 (file)
index 0000000..e98cc81
--- /dev/null
+++ b/kernel/drivers/input/misc/twl4030-pwrbutton.c
@@ -0,0 +1,115 @@
+/**
+ * twl4030-pwrbutton.c - TWL4030 Power Button Input Driver
+ *
+ * Copyright (C) 2008-2009 Nokia Corporation
+ *
+ * Written by Peter De Schrijver <peter.de-schrijver@nokia.com>
+ * Several fixes by Felipe Balbi <felipe.balbi@nokia.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file "COPYING" in the main directory of this
+ * archive for more details.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/i2c/twl.h>
+
+#define PWR_PWRON_IRQ (1 << 0)
+
+#define STS_HW_CONDITIONS 0xf
+
+static irqreturn_t powerbutton_irq(int irq, void *_pwr)
+{
+       struct input_dev *pwr = _pwr;
+       int err;
+       u8 value;
+
+       err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &value, STS_HW_CONDITIONS);
+       if (!err)  {
+               pm_wakeup_event(pwr->dev.parent, 0);
+               input_report_key(pwr, KEY_POWER, value & PWR_PWRON_IRQ);
+               input_sync(pwr);
+       } else {
+               dev_err(pwr->dev.parent, "twl4030: i2c error %d while reading"
+                       " TWL4030 PM_MASTER STS_HW_CONDITIONS register\n", err);
+       }
+
+       return IRQ_HANDLED;
+}
+
+static int twl4030_pwrbutton_probe(struct platform_device *pdev)
+{
+       struct input_dev *pwr;
+       int irq = platform_get_irq(pdev, 0);
+       int err;
+
+       pwr = devm_input_allocate_device(&pdev->dev);
+       if (!pwr) {
+               dev_err(&pdev->dev, "Can't allocate power button\n");
+               return -ENOMEM;
+       }
+
+       pwr->evbit[0] = BIT_MASK(EV_KEY);
+       pwr->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER);
+       pwr->name = "twl4030_pwrbutton";
+       pwr->phys = "twl4030_pwrbutton/input0";
+       pwr->dev.parent = &pdev->dev;
+
+       err = devm_request_threaded_irq(&pwr->dev, irq, NULL, powerbutton_irq,
+                       IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
+                       "twl4030_pwrbutton", pwr);
+       if (err < 0) {
+               dev_err(&pdev->dev, "Can't get IRQ for pwrbutton: %d\n", err);
+               return err;
+       }
+
+       err = input_register_device(pwr);
+       if (err) {
+               dev_err(&pdev->dev, "Can't register power button: %d\n", err);
+               return err;
+       }
+
+       platform_set_drvdata(pdev, pwr);
+       device_init_wakeup(&pdev->dev, true);
+
+       return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id twl4030_pwrbutton_dt_match_table[] = {
+       { .compatible = "ti,twl4030-pwrbutton" },
+       {},
+};
+MODULE_DEVICE_TABLE(of, twl4030_pwrbutton_dt_match_table);
+#endif
+
+static struct platform_driver twl4030_pwrbutton_driver = {
+       .probe          = twl4030_pwrbutton_probe,
+       .driver         = {
+               .name   = "twl4030_pwrbutton",
+               .of_match_table = of_match_ptr(twl4030_pwrbutton_dt_match_table),
+       },
+};
+module_platform_driver(twl4030_pwrbutton_driver);
+
+MODULE_ALIAS("platform:twl4030_pwrbutton");
+MODULE_DESCRIPTION("Triton2 Power Button");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Peter De Schrijver <peter.de-schrijver@nokia.com>");
+MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>");
+