With this driver, we can report KEY_POWER on
AM437x SK. This patch has been tested with said
board.
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
Changes since v1:
- Add device tree documentation
- s/ret/error
- removed 'pressed' as input core will filter events
- use a saner name when requesting IRQ. dev_name(dev) will return
$i2c_bus_address.i2c-omap:0-0024:tps65218-pwrbutton
- remove blank line before MODULE_DEVICE_TABLE()
.../bindings/input/tps65218-pwrbutton.txt | 17 +++
drivers/input/misc/Kconfig | 10 ++
drivers/input/misc/Makefile | 1 +
drivers/input/misc/tps65218-pwrbutton.c | 124 +++++++++++++++++++++
4 files changed, 152 insertions(+)
create mode 100644 Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt
create mode 100644 drivers/input/misc/tps65218-pwrbutton.c
diff --git a/Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt b/Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt
new file mode 100644
index 0000000..e30e0b9
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt
@@ -0,0 +1,17 @@
+Texas Instruments TPS65218 power button
+
+This driver provides a simple power button event via an Interrupt.
+
+Required properties:
+- compatible: should be "ti,tps65218-pwrbutton"
+- interrupts: should be one of the following
+ - <3 IRQ_TYPE_EDGE_BOTH>: For controllers compatible with tps65218
+
+Example:
+
+&tps {
+ power-button {
+ compatible = "ti,tps65218-pwrbutton";
+ interrupts = <3 IRQ_TYPE_EDGE_BOTH>;
+ };
+};
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 23297ab..364cfb8 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -404,6 +404,16 @@ config INPUT_RETU_PWRBUTTON
To compile this driver as a module, choose M here. The module will
be called retu-pwrbutton.
+config INPUT_TPS65218_PWRBUTTON
+ tristate "TPS65218 Power button driver"
+ depends on MFD_TPS65218
+ help
+ Say Y here if you want to enable power buttong reporting for
+ the TPS65218 Power Management IC device.
+
+ To compile this driver as a module, choose M here. The module will
+ be called tps65218-pwrbutton.
+
config INPUT_TWL4030_PWRBUTTON
tristate "TWL4030 Power button Driver"
depends on TWL4030_CORE
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 19c7603..a923753 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -59,6 +59,7 @@ obj-$(CONFIG_INPUT_SGI_BTNS) += sgi_btns.o
obj-$(CONFIG_INPUT_SIRFSOC_ONKEY) += sirfsoc-onkey.o
obj-$(CONFIG_INPUT_SOC_BUTTON_ARRAY) += soc_button_array.o
obj-$(CONFIG_INPUT_SPARCSPKR) += sparcspkr.o
+obj-$(CONFIG_INPUT_TPS65218_PWRBUTTON) += tps65218-pwrbutton.o
obj-$(CONFIG_INPUT_TWL4030_PWRBUTTON) += twl4030-pwrbutton.o
obj-$(CONFIG_INPUT_TWL4030_VIBRA) += twl4030-vibra.o
obj-$(CONFIG_INPUT_TWL6040_VIBRA) += twl6040-vibra.o
diff --git a/drivers/input/misc/tps65218-pwrbutton.c b/drivers/input/misc/tps65218-pwrbutton.c
new file mode 100644
index 0000000..2f85e2e
--- /dev/null
+++ b/drivers/input/misc/tps65218-pwrbutton.c
@@ -0,0 +1,124 @@
+/*
+ * Texas Instruments' TPS65218 Power Button Input Driver
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
+ * Author: Felipe Balbi <balbi@xxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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/init.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/tps65218.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+struct tps65218_pwrbutton {
+ struct device *dev;
+ struct tps65218 *tps;
+ struct input_dev *idev;
+};
+
+static irqreturn_t tps65218_pwr_irq(int irq, void *_pwr)
+{
+ struct tps65218_pwrbutton *pwr = _pwr;
+ unsigned int reg;
+ int error;
+
+ error = tps65218_reg_read(pwr->tps, TPS65218_REG_STATUS, ®);
+ if (error) {
+ dev_err(pwr->dev, "can't read register --> %d\n", error);
+ goto out;
+ }
+
+ if (reg & TPS65218_STATUS_PB_STATE) {
+ input_report_key(pwr->idev, KEY_POWER, 1);
+ pm_wakeup_event(pwr->dev, 0);
+ } else {
+ input_report_key(pwr->idev, KEY_POWER, 0);
+ }
+
+ input_sync(pwr->idev);
+
+out:
+ return IRQ_HANDLED;
+}
+
+static int tps65218_pwron_probe(struct platform_device *pdev)
+{
+ struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
+ struct device *dev = &pdev->dev;
+ struct tps65218_pwrbutton *pwr;
+ struct input_dev *idev;
+ int error;
+ int irq;
+
+ pwr = devm_kzalloc(dev, sizeof(*pwr), GFP_KERNEL);
+ if (!pwr)
+ return -ENOMEM;
+
+ idev = devm_input_allocate_device(dev);
+ if (!idev)
+ return -ENOMEM;
+
+ idev->name = "tps65218_pwrbutton";
+ idev->phys = "tps65218_pwrbutton/input0";
+ idev->dev.parent = dev;
+ idev->id.bustype = BUS_I2C;
+
+ input_set_capability(idev, EV_KEY, KEY_POWER);
+
+ pwr->tps = tps;
+ pwr->dev = dev;
+ pwr->idev = idev;
+ platform_set_drvdata(pdev, pwr);
+ device_init_wakeup(dev, true);
+
+ irq = platform_get_irq(pdev, 0);
+ error = devm_request_threaded_irq(dev, irq, NULL, tps65218_pwr_irq,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ "tps65218-pwrbutton", pwr);
+ if (error) {
+ dev_err(dev, "failed to request IRQ #%d --> %d\n",
+ irq, error);
+ return error;
+ }
+
+ error= input_register_device(idev);
+ if (error) {
+ dev_err(dev, "Can't register power button --> %d\n", error);
+ return error;
+ }
+
+ return 0;
+}
+
+static struct of_device_id of_tps65218_pwr_match[] = {
+ { .compatible = "ti,tps65218-pwrbutton" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, of_tps65218_pwr_match);
+
+static struct platform_driver tps65218_pwron_driver = {
+ .probe = tps65218_pwron_probe,
+ .driver = {
+ .name = "tps65218_pwrbutton",
+ .of_match_table = of_tps65218_pwr_match,
+ },
+};
+module_platform_driver(tps65218_pwron_driver);
+
+MODULE_DESCRIPTION("TPS65218 Power Button");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Felipe Balbi <balbi@xxxxxx>");
--
2.2.0
--
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