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Subject[PATCH v10 10/11] input: max77650: add onkey support
Date
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Add support for the push- and slide-button events for max77650.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
---
drivers/input/misc/Kconfig | 9 +++
drivers/input/misc/Makefile | 1 +
drivers/input/misc/max77650-onkey.c | 121 ++++++++++++++++++++++++++++
3 files changed, 131 insertions(+)
create mode 100644 drivers/input/misc/max77650-onkey.c

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index e15ed1bb8558..85bc675eecd3 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -190,6 +190,15 @@ config INPUT_M68K_BEEP
tristate "M68k Beeper support"
depends on M68K

+config INPUT_MAX77650_ONKEY
+ tristate "Maxim MAX77650 ONKEY support"
+ depends on MFD_MAX77650
+ help
+ Support the ONKEY of the MAX77650 PMIC as an input device.
+
+ To compile this driver as a module, choose M here: the module
+ will be called max77650-onkey.
+
config INPUT_MAX77693_HAPTIC
tristate "MAXIM MAX77693/MAX77843 haptic controller support"
depends on (MFD_MAX77693 || MFD_MAX77843) && PWM
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index b936c5b1d4ac..ffd72161c79b 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_INPUT_IXP4XX_BEEPER) += ixp4xx-beeper.o
obj-$(CONFIG_INPUT_KEYSPAN_REMOTE) += keyspan_remote.o
obj-$(CONFIG_INPUT_KXTJ9) += kxtj9.o
obj-$(CONFIG_INPUT_M68K_BEEP) += m68kspkr.o
+obj-$(CONFIG_INPUT_MAX77650_ONKEY) += max77650-onkey.o
obj-$(CONFIG_INPUT_MAX77693_HAPTIC) += max77693-haptic.o
obj-$(CONFIG_INPUT_MAX8925_ONKEY) += max8925_onkey.o
obj-$(CONFIG_INPUT_MAX8997_HAPTIC) += max8997_haptic.o
diff --git a/drivers/input/misc/max77650-onkey.c b/drivers/input/misc/max77650-onkey.c
new file mode 100644
index 000000000000..fbf6caab7217
--- /dev/null
+++ b/drivers/input/misc/max77650-onkey.c
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (C) 2018 BayLibre SAS
+// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
+//
+// ONKEY driver for MAXIM 77650/77651 charger/power-supply.
+
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/max77650.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define MAX77650_ONKEY_MODE_MASK BIT(3)
+#define MAX77650_ONKEY_MODE_PUSH 0x00
+#define MAX77650_ONKEY_MODE_SLIDE BIT(3)
+
+struct max77650_onkey {
+ struct input_dev *input;
+ unsigned int code;
+};
+
+static irqreturn_t max77650_onkey_falling(int irq, void *data)
+{
+ struct max77650_onkey *onkey = data;
+
+ input_report_key(onkey->input, onkey->code, 0);
+ input_sync(onkey->input);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t max77650_onkey_rising(int irq, void *data)
+{
+ struct max77650_onkey *onkey = data;
+
+ input_report_key(onkey->input, onkey->code, 1);
+ input_sync(onkey->input);
+
+ return IRQ_HANDLED;
+}
+
+static int max77650_onkey_probe(struct platform_device *pdev)
+{
+ int irq_r, irq_f, error, mode;
+ struct max77650_onkey *onkey;
+ struct device *dev, *parent;
+ struct regmap *map;
+ unsigned int type;
+
+ dev = &pdev->dev;
+ parent = dev->parent;
+
+ map = dev_get_regmap(parent, NULL);
+ if (!map)
+ return -ENODEV;
+
+ onkey = devm_kzalloc(dev, sizeof(*onkey), GFP_KERNEL);
+ if (!onkey)
+ return -ENOMEM;
+
+ error = device_property_read_u32(dev, "linux,code", &onkey->code);
+ if (error)
+ onkey->code = KEY_POWER;
+
+ if (device_property_read_bool(dev, "maxim,onkey-slide")) {
+ mode = MAX77650_ONKEY_MODE_SLIDE;
+ type = EV_SW;
+ } else {
+ mode = MAX77650_ONKEY_MODE_PUSH;
+ type = EV_KEY;
+ }
+
+ error = regmap_update_bits(map, MAX77650_REG_CNFG_GLBL,
+ MAX77650_ONKEY_MODE_MASK, mode);
+ if (error)
+ return error;
+
+ irq_f = platform_get_irq_byname(pdev, "nEN_F");
+ if (irq_f < 0)
+ return irq_f;
+
+ irq_r = platform_get_irq_byname(pdev, "nEN_R");
+ if (irq_r < 0)
+ return irq_r;
+
+ onkey->input = devm_input_allocate_device(dev);
+ if (!onkey->input)
+ return -ENOMEM;
+
+ onkey->input->name = "max77650_onkey";
+ onkey->input->phys = "max77650_onkey/input0";
+ onkey->input->id.bustype = BUS_I2C;
+ input_set_capability(onkey->input, type, onkey->code);
+
+ error = devm_request_any_context_irq(dev, irq_f, max77650_onkey_falling,
+ IRQF_ONESHOT, "onkey-down", onkey);
+ if (error < 0)
+ return error;
+
+ error = devm_request_any_context_irq(dev, irq_r, max77650_onkey_rising,
+ IRQF_ONESHOT, "onkey-up", onkey);
+ if (error < 0)
+ return error;
+
+ return input_register_device(onkey->input);
+}
+
+static struct platform_driver max77650_onkey_driver = {
+ .driver = {
+ .name = "max77650-onkey",
+ },
+ .probe = max77650_onkey_probe,
+};
+module_platform_driver(max77650_onkey_driver);
+
+MODULE_DESCRIPTION("MAXIM 77650/77651 ONKEY driver");
+MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
+MODULE_LICENSE("GPL v2");
--
2.21.0
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