platform/x86: intel_chtdc_ti_pwrbtn: Move to intel sub-directory

Move Intel Cherry Trail Dollar Cove TI power button driver
to intel sub-directory to improve readability.

Signed-off-by: Kate Hsuan <hpa@redhat.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210820110458.73018-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

3 files changed, 107 insertions, 0 deletions

diff --git a/drivers/platform/x86/intel/Kconfig b/drivers/platform/x86/intel/Kconfig
index 46db129bee7f..3792a5492a8a 100644
--- a/drivers/platform/x86/intel/Kconfig
+++ b/drivers/platform/x86/intel/Kconfig
@@ -31,4 +31,15 @@ config INTEL_BXTWC_PMIC_TMU
 	  This driver enables the alarm wakeup functionality in the TMU unit of
 	  Whiskey Cove PMIC.
 
+config INTEL_CHTDC_TI_PWRBTN
+	tristate "Intel Cherry Trail Dollar Cove TI power button driver"
+	depends on INTEL_SOC_PMIC_CHTDC_TI
+	depends on INPUT
+	help
+	  This option adds a power button driver for Dollar Cove TI
+	  PMIC on Intel Cherry Trail devices.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called intel_chtdc_ti_pwrbtn.
+
 endif # X86_PLATFORM_DRIVERS_INTEL
diff --git a/drivers/platform/x86/intel/Makefile b/drivers/platform/x86/intel/Makefile
index dbdf4877ad10..52d7bc0948f3 100644
--- a/drivers/platform/x86/intel/Makefile
+++ b/drivers/platform/x86/intel/Makefile
@@ -12,3 +12,5 @@ obj-$(CONFIG_INTEL_PMT_CLASS)		+= pmt/
 # Intel PMIC / PMC / P-Unit drivers
 intel_bxtwc_tmu-y			:= bxtwc_tmu.o
 obj-$(CONFIG_INTEL_BXTWC_PMIC_TMU)	+= intel_bxtwc_tmu.o
+intel_chtdc_ti_pwrbtn-y			:= chtdc_ti_pwrbtn.o
+obj-$(CONFIG_INTEL_CHTDC_TI_PWRBTN)	+= intel_chtdc_ti_pwrbtn.o
diff --git a/drivers/platform/x86/intel/chtdc_ti_pwrbtn.c b/drivers/platform/x86/intel/chtdc_ti_pwrbtn.c
new file mode 100644
index 000000000000..9606a994af22
--- /dev/null
+++ b/drivers/platform/x86/intel/chtdc_ti_pwrbtn.c
@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Power-button driver for Dollar Cove TI PMIC
+ * Copyright (C) 2014 Intel Corp
+ * Copyright (c) 2017 Takashi Iwai <tiwai@suse.de>
+ */
+
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/mfd/intel_soc_pmic.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_wakeirq.h>
+#include <linux/slab.h>
+
+#define CHTDC_TI_SIRQ_REG	0x3
+#define SIRQ_PWRBTN_REL		BIT(0)
+
+static irqreturn_t chtdc_ti_pwrbtn_interrupt(int irq, void *dev_id)
+{
+	struct input_dev *input = dev_id;
+	struct device *dev = input->dev.parent;
+	struct regmap *regmap = dev_get_drvdata(dev);
+	int state;
+
+	if (!regmap_read(regmap, CHTDC_TI_SIRQ_REG, &state)) {
+		dev_dbg(dev, "SIRQ_REG=0x%x\n", state);
+		input_report_key(input, KEY_POWER, !(state & SIRQ_PWRBTN_REL));
+		input_sync(input);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int chtdc_ti_pwrbtn_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct intel_soc_pmic *pmic = dev_get_drvdata(dev->parent);
+	struct input_dev *input;
+	int irq, err;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+	input = devm_input_allocate_device(dev);
+	if (!input)
+		return -ENOMEM;
+	input->name = pdev->name;
+	input->phys = "power-button/input0";
+	input->id.bustype = BUS_HOST;
+	input_set_capability(input, EV_KEY, KEY_POWER);
+	err = input_register_device(input);
+	if (err)
+		return err;
+
+	dev_set_drvdata(dev, pmic->regmap);
+
+	err = devm_request_threaded_irq(dev, irq, NULL,
+					chtdc_ti_pwrbtn_interrupt,
+					IRQF_ONESHOT, KBUILD_MODNAME, input);
+	if (err)
+		return err;
+
+	device_init_wakeup(dev, true);
+	dev_pm_set_wake_irq(dev, irq);
+	return 0;
+}
+
+static int chtdc_ti_pwrbtn_remove(struct platform_device *pdev)
+{
+	dev_pm_clear_wake_irq(&pdev->dev);
+	device_init_wakeup(&pdev->dev, false);
+	return 0;
+}
+
+static const struct platform_device_id chtdc_ti_pwrbtn_id_table[] = {
+	{ .name = "chtdc_ti_pwrbtn" },
+	{},
+};
+MODULE_DEVICE_TABLE(platform, chtdc_ti_pwrbtn_id_table);
+
+static struct platform_driver chtdc_ti_pwrbtn_driver = {
+	.driver = {
+		.name	= KBUILD_MODNAME,
+	},
+	.probe		= chtdc_ti_pwrbtn_probe,
+	.remove		= chtdc_ti_pwrbtn_remove,
+	.id_table	= chtdc_ti_pwrbtn_id_table,
+};
+module_platform_driver(chtdc_ti_pwrbtn_driver);
+
+MODULE_DESCRIPTION("Power-button driver for Dollar Cove TI PMIC");
+MODULE_LICENSE("GPL v2");