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Message-Id: <20250826134631.1499936-2-mwalle@kernel.org>
Date: Tue, 26 Aug 2025 15:46:29 +0200
From: Michael Walle <mwalle@...nel.org>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>,
Lee Jones <lee@...nel.org>
Cc: jcormier@...ticallink.com,
Job Sava <jsava@...ticallink.com>,
linux-kernel@...r.kernel.org,
linux-input@...r.kernel.org,
Michael Walle <mwalle@...nel.org>
Subject: [PATCH v2 1/3] input: tps6594-pwrbutton: Add power button functionality
From: Job Sava <jsava@...ticallink.com>
TPS6594 defines two interrupts for the power button one for push and
one for release.
This driver is very simple in that it maps the push interrupt to a key
input and the release interrupt to a key release.
Signed-off-by: Job Sava <jsava@...ticallink.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Signed-off-by: Michael Walle <mwalle@...nel.org>
---
v2:
- moved the mfd part into a seperate patch
---
drivers/input/misc/Kconfig | 10 ++
drivers/input/misc/Makefile | 1 +
drivers/input/misc/tps6594-pwrbutton.c | 126 +++++++++++++++++++++++++
3 files changed, 137 insertions(+)
create mode 100644 drivers/input/misc/tps6594-pwrbutton.c
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 0fb21c99a5e3..cce51358242f 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -506,6 +506,16 @@ config INPUT_TPS65219_PWRBUTTON
To compile this driver as a module, choose M here. The module will
be called tps65219-pwrbutton.
+config INPUT_TPS6594_PWRBUTTON
+ tristate "TPS6594 Power button driver"
+ depends on MFD_TPS6594
+ help
+ Say Y here if you want to enable power button reporting for
+ TPS6594 Power Management IC devices.
+
+ To compile this driver as a module, choose M here. The module will
+ be called tps6594-pwrbutton.
+
config INPUT_AXP20X_PEK
tristate "X-Powers AXP20X power button driver"
depends on MFD_AXP20X
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index d468c8140b93..bb12f883851c 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -83,6 +83,7 @@ obj-$(CONFIG_INPUT_SPARCSPKR) += sparcspkr.o
obj-$(CONFIG_INPUT_STPMIC1_ONKEY) += stpmic1_onkey.o
obj-$(CONFIG_INPUT_TPS65218_PWRBUTTON) += tps65218-pwrbutton.o
obj-$(CONFIG_INPUT_TPS65219_PWRBUTTON) += tps65219-pwrbutton.o
+obj-$(CONFIG_INPUT_TPS6594_PWRBUTTON) += tps6594-pwrbutton.o
obj-$(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/tps6594-pwrbutton.c b/drivers/input/misc/tps6594-pwrbutton.c
new file mode 100644
index 000000000000..cd039b3866dc
--- /dev/null
+++ b/drivers/input/misc/tps6594-pwrbutton.c
@@ -0,0 +1,126 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * power button driver for TI TPS6594 PMICs
+ *
+ * Copyright (C) 2025 Critical Link LLC - https://www.criticallink.com/
+ */
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/tps6594.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+struct tps6594_pwrbutton {
+ struct device *dev;
+ struct input_dev *idev;
+ char phys[32];
+};
+
+static irqreturn_t tps6594_pb_push_irq(int irq, void *_pwr)
+{
+ struct tps6594_pwrbutton *pwr = _pwr;
+
+ input_report_key(pwr->idev, KEY_POWER, 1);
+ pm_wakeup_event(pwr->dev, 0);
+ input_sync(pwr->idev);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t tps6594_pb_release_irq(int irq, void *_pwr)
+{
+ struct tps6594_pwrbutton *pwr = _pwr;
+
+ input_report_key(pwr->idev, KEY_POWER, 0);
+ input_sync(pwr->idev);
+
+ return IRQ_HANDLED;
+}
+
+static int tps6594_pb_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct tps6594_pwrbutton *pwr;
+ struct input_dev *idev;
+ int error;
+ int push_irq;
+ int release_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 = pdev->name;
+ snprintf(pwr->phys, sizeof(pwr->phys), "%s/input0",
+ pdev->name);
+ idev->phys = pwr->phys;
+ idev->id.bustype = BUS_I2C;
+
+ input_set_capability(idev, EV_KEY, KEY_POWER);
+
+ pwr->dev = dev;
+ pwr->idev = idev;
+ device_init_wakeup(dev, true);
+
+ push_irq = platform_get_irq(pdev, 0);
+ if (push_irq < 0)
+ return -EINVAL;
+
+ release_irq = platform_get_irq(pdev, 1);
+ if (release_irq < 0)
+ return -EINVAL;
+
+ error = devm_request_threaded_irq(dev, push_irq, NULL,
+ tps6594_pb_push_irq,
+ IRQF_ONESHOT,
+ pdev->resource[0].name, pwr);
+ if (error) {
+ dev_err(dev, "failed to request push IRQ #%d: %d\n", push_irq,
+ error);
+ return error;
+ }
+
+ error = devm_request_threaded_irq(dev, release_irq, NULL,
+ tps6594_pb_release_irq,
+ IRQF_ONESHOT,
+ pdev->resource[1].name, pwr);
+ if (error) {
+ dev_err(dev, "failed to request release IRQ #%d: %d\n",
+ release_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 const struct platform_device_id tps6594_pwrbtn_id_table[] = {
+ { "tps6594-pwrbutton", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, tps6594_pwrbtn_id_table);
+
+static struct platform_driver tps6594_pb_driver = {
+ .probe = tps6594_pb_probe,
+ .driver = {
+ .name = "tps6594_pwrbutton",
+ },
+ .id_table = tps6594_pwrbtn_id_table,
+};
+module_platform_driver(tps6594_pb_driver);
+
+MODULE_DESCRIPTION("TPS6594 Power Button");
+MODULE_LICENSE("GPL");
--
2.39.5
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