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Message-ID: <aEn2CXio9a8TVG4V@lizhi-Precision-Tower-5810>
Date: Wed, 11 Jun 2025 17:32:57 -0400
From: Frank Li <Frank.li@....com>
To: samuel.kayode@...oirfairelinux.com
Cc: Lee Jones <lee@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
Sebastian Reichel <sre@...nel.org>, imx@...ts.linux.dev,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-input@...r.kernel.org, linux-pm@...r.kernel.org,
Abel Vesa <abelvesa@...nel.org>, Abel Vesa <abelvesa@...ux.com>,
Robin Gong <b38343@...escale.com>, Robin Gong <yibin.gong@....com>,
Enric Balletbo i Serra <eballetbo@...il.com>
Subject: Re: [PATCH v6 4/6] input: pf1550: add onkey support
On Wed, Jun 11, 2025 at 04:03:01PM -0400, Samuel Kayode via B4 Relay wrote:
> From: Samuel Kayode <samuel.kayode@...oirfairelinux.com>
>
> Add support for the onkey of the pf1550 PMIC.
>
> Signed-off-by: Samuel Kayode <samuel.kayode@...oirfairelinux.com>
Reviewed-by: Frank Li <Frank.Li@....com>
> ---
> v4:
> - Address Dmitry's feedback
> - Drop irq variable in onkey_drv_data
> - Drop keycode variable in onkey_drv_data
> - Define wakeup as type bool
> - Use platform_get_irq
> - Use type const for struct pf1550_dev in onkey_drv_data
> - Replace (error < 0) with (error) in if statement when applicable
> - No need to define driver_data in table id
> - Define driver.pm with pm_sleep_ptr
> v3:
> - Address Dmitry's feedback
> - Drop compatible string
> - Remove dependency on OF
> - Use generic device properties
> - Drop unnecessary includes
> - Drop unnecessary initializations in probe
> - Always use the KEY_POWER property for onkey->keycode
> - Do mapping of irqs in MFD driver
> - Define onkey->input before interrupts are active
> - Drop unnecessary input_free_device since devm
> - Manage onkey irqs instead of the main interrupt line.
> - Fix integer overflow when unmasking onkey irqs in onkey_resume.
> v2:
> - Add driver for onkey
> ---
> drivers/input/misc/Kconfig | 11 +++
> drivers/input/misc/Makefile | 1 +
> drivers/input/misc/pf1550-onkey.c | 183 ++++++++++++++++++++++++++++++++++++++
> 3 files changed, 195 insertions(+)
>
> diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
> index f5496ca0c0d2bfcb7968503ccd1844ff43bbc1c0..47b3c43ff0550f14d61990997976366436411adc 100644
> --- a/drivers/input/misc/Kconfig
> +++ b/drivers/input/misc/Kconfig
> @@ -179,6 +179,17 @@ 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 6d91804d0a6f761a094e6c380f878f74c3054d63..c652337de464c1eeaf1515d0bc84d10de0cb3a74 100644
> --- a/drivers/input/misc/Makefile
> +++ b/drivers/input/misc/Makefile
> @@ -62,6 +62,7 @@ obj-$(CONFIG_INPUT_PCAP) += pcap_keys.o
> obj-$(CONFIG_INPUT_PCF50633_PMU) += pcf50633-input.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
> index 0000000000000000000000000000000000000000..7e604c5544066eefbd84abe7bdff767b8b8978ab
> --- /dev/null
> +++ b/drivers/input/misc/pf1550-onkey.c
> @@ -0,0 +1,183 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// Driver for the PF1550 ON_KEY
> +// Copyright (C) 2016 Freescale Semiconductor, Inc. All Rights Reserved.
> +//
> +// Portions Copyright (c) 2025 Savoir-faire Linux Inc.
> +// Samuel Kayode <samuel.kayode@...oirfairelinux.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_dev *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;
> + 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");
> +
> + 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;
> +
> + 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", 0 },
> + { /* 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");
>
> --
> 2.49.0
>
>
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