Input: pf1550 - add onkey support

Add support for the onkey of the pf1550 PMIC.

Signed-off-by: Samuel Kayode <samuel.kayode@savoirfairelinux.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Tested-by: Sean Nyekjaer <sean@geanix.com>
Link: https://patch.msgid.link/20251001-pf1550-v12-4-a3302aa41687@savoirfairelinux.com
Signed-off-by: Lee Jones <lee@kernel.org>

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index cc2558630797e6913b6f2f76d7047e95b3a2fd5c..94a753fcb64fa5ee1b3ec8b61e31492d9401b515 100644 (file)
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -190,6 +190,17 @@ config INPUT_PCSPKR
          To compile this driver as a module, choose M here: the
          module will be called pcspkr.
 
+config INPUT_PF1550_ONKEY
+       tristate "NXP PF1550 Onkey support"
+       depends on MFD_PF1550
+       help
+         Say Y here if you want support for PF1550 PMIC. Onkey can trigger
+         release and 1s(push hold), 2s, 3s, 4s, 8s interrupt for long press
+         detect.
+
+         To compile this driver as a module, choose M here. The module will be
+         called pf1550-onkey.
+
 config INPUT_PM8941_PWRKEY
        tristate "Qualcomm PM8941 power key support"
        depends on MFD_SPMI_PMIC

diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index f5ebfa9d99831436dc1c0ad982b60921035dce77..415fc4e2918be89fa2a6fb79f013e3b50738f949 100644 (file)
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -63,6 +63,7 @@ obj-$(CONFIG_INPUT_PALMAS_PWRBUTTON)  += palmas-pwrbutton.o
 obj-$(CONFIG_INPUT_PCAP)               += pcap_keys.o
 obj-$(CONFIG_INPUT_PCF8574)            += pcf8574_keypad.o
 obj-$(CONFIG_INPUT_PCSPKR)             += pcspkr.o
+obj-$(CONFIG_INPUT_PF1550_ONKEY)       += pf1550-onkey.o
 obj-$(CONFIG_INPUT_PM8941_PWRKEY)      += pm8941-pwrkey.o
 obj-$(CONFIG_INPUT_PM8XXX_VIBRATOR)    += pm8xxx-vibrator.o
 obj-$(CONFIG_INPUT_PMIC8XXX_PWRKEY)    += pmic8xxx-pwrkey.o

diff --git a/drivers/input/misc/pf1550-onkey.c b/drivers/input/misc/pf1550-onkey.c
new file mode 100644 (file)
index 0000000..9be6377
--- /dev/null
+++ b/drivers/input/misc/pf1550-onkey.c
@@ -0,0 +1,197 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for the PF1550 ONKEY
+ * Copyright (C) 2016 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * Portions Copyright (c) 2025 Savoir-faire Linux Inc.
+ * Samuel Kayode <samuel.kayode@savoirfairelinux.com>
+ */
+
+#include <linux/err.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mfd/pf1550.h>
+#include <linux/platform_device.h>
+
+#define PF1550_ONKEY_IRQ_NR    6
+
+struct onkey_drv_data {
+       struct device *dev;
+       const struct pf1550_ddata *pf1550;
+       bool wakeup;
+       struct input_dev *input;
+};
+
+static irqreturn_t pf1550_onkey_irq_handler(int irq, void *data)
+{
+       struct onkey_drv_data *onkey = data;
+       struct platform_device *pdev = to_platform_device(onkey->dev);
+       int i, state, irq_type = -1;
+
+       for (i = 0; i < PF1550_ONKEY_IRQ_NR; i++)
+               if (irq == platform_get_irq(pdev, i))
+                       irq_type = i;
+
+       switch (irq_type) {
+       case PF1550_ONKEY_IRQ_PUSHI:
+               state = 0;
+               break;
+       case PF1550_ONKEY_IRQ_1SI:
+       case PF1550_ONKEY_IRQ_2SI:
+       case PF1550_ONKEY_IRQ_3SI:
+       case PF1550_ONKEY_IRQ_4SI:
+       case PF1550_ONKEY_IRQ_8SI:
+               state = 1;
+               break;
+       default:
+               dev_err(onkey->dev, "onkey interrupt: irq %d occurred\n",
+                       irq_type);
+               return IRQ_HANDLED;
+       }
+
+       input_event(onkey->input, EV_KEY, KEY_POWER, state);
+       input_sync(onkey->input);
+
+       return IRQ_HANDLED;
+}
+
+static int pf1550_onkey_probe(struct platform_device *pdev)
+{
+       struct onkey_drv_data *onkey;
+       struct input_dev *input;
+       bool key_power = false;
+       int i, irq, error;
+
+       onkey = devm_kzalloc(&pdev->dev, sizeof(*onkey), GFP_KERNEL);
+       if (!onkey)
+               return -ENOMEM;
+
+       onkey->dev = &pdev->dev;
+
+       onkey->pf1550 = dev_get_drvdata(pdev->dev.parent);
+       if (!onkey->pf1550->regmap)
+               return dev_err_probe(&pdev->dev, -ENODEV,
+                                    "failed to get regmap\n");
+
+       onkey->wakeup = device_property_read_bool(pdev->dev.parent,
+                                                 "wakeup-source");
+
+       if (device_property_read_bool(pdev->dev.parent,
+                                     "nxp,disable-key-power")) {
+               error = regmap_clear_bits(onkey->pf1550->regmap,
+                                         PF1550_PMIC_REG_PWRCTRL1,
+                                         PF1550_ONKEY_RST_EN);
+               if (error)
+                       return dev_err_probe(&pdev->dev, error,
+                                            "failed: disable turn system off");
+       } else {
+               key_power = true;
+       }
+
+       input = devm_input_allocate_device(&pdev->dev);
+       if (!input)
+               return dev_err_probe(&pdev->dev, -ENOMEM,
+                                    "failed to allocate the input device\n");
+
+       input->name = pdev->name;
+       input->phys = "pf1550-onkey/input0";
+       input->id.bustype = BUS_HOST;
+
+       if (key_power)
+               input_set_capability(input, EV_KEY, KEY_POWER);
+
+       onkey->input = input;
+       platform_set_drvdata(pdev, onkey);
+
+       for (i = 0; i < PF1550_ONKEY_IRQ_NR; i++) {
+               irq = platform_get_irq(pdev, i);
+               if (irq < 0)
+                       return irq;
+
+               error = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+                                                 pf1550_onkey_irq_handler,
+                                                 IRQF_NO_SUSPEND,
+                                                 "pf1550-onkey", onkey);
+               if (error)
+                       return dev_err_probe(&pdev->dev, error,
+                                            "failed: irq request (IRQ: %d)\n",
+                                            i);
+       }
+
+       error = input_register_device(input);
+       if (error)
+               return dev_err_probe(&pdev->dev, error,
+                                    "failed to register input device\n");
+
+       device_init_wakeup(&pdev->dev, onkey->wakeup);
+
+       return 0;
+}
+
+static int pf1550_onkey_suspend(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct onkey_drv_data *onkey = platform_get_drvdata(pdev);
+       int i, irq;
+
+       if (!device_may_wakeup(&pdev->dev))
+               regmap_write(onkey->pf1550->regmap,
+                            PF1550_PMIC_REG_ONKEY_INT_MASK0,
+                            ONKEY_IRQ_PUSHI | ONKEY_IRQ_1SI | ONKEY_IRQ_2SI |
+                            ONKEY_IRQ_3SI | ONKEY_IRQ_4SI | ONKEY_IRQ_8SI);
+       else
+               for (i = 0; i < PF1550_ONKEY_IRQ_NR; i++) {
+                       irq = platform_get_irq(pdev, i);
+                       if (irq > 0)
+                               enable_irq_wake(irq);
+               }
+
+       return 0;
+}
+
+static int pf1550_onkey_resume(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct onkey_drv_data *onkey = platform_get_drvdata(pdev);
+       int i, irq;
+
+       if (!device_may_wakeup(&pdev->dev))
+               regmap_write(onkey->pf1550->regmap,
+                            PF1550_PMIC_REG_ONKEY_INT_MASK0,
+                            ~((u8)(ONKEY_IRQ_PUSHI | ONKEY_IRQ_1SI |
+                            ONKEY_IRQ_2SI | ONKEY_IRQ_3SI | ONKEY_IRQ_4SI |
+                            ONKEY_IRQ_8SI)));
+       else
+               for (i = 0; i < PF1550_ONKEY_IRQ_NR; i++) {
+                       irq = platform_get_irq(pdev, i);
+                       if (irq > 0)
+                               disable_irq_wake(irq);
+               }
+
+       return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(pf1550_onkey_pm_ops, pf1550_onkey_suspend,
+                        pf1550_onkey_resume);
+
+static const struct platform_device_id pf1550_onkey_id[] = {
+       { "pf1550-onkey", },
+       { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, pf1550_onkey_id);
+
+static struct platform_driver pf1550_onkey_driver = {
+       .driver = {
+               .name = "pf1550-onkey",
+               .pm   = pm_sleep_ptr(&pf1550_onkey_pm_ops),
+       },
+       .probe = pf1550_onkey_probe,
+       .id_table = pf1550_onkey_id,
+};
+module_platform_driver(pf1550_onkey_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor");
+MODULE_DESCRIPTION("PF1550 onkey Driver");
+MODULE_LICENSE("GPL");