platform/x86: Add support for Basin Cove power button (6456fd73) · Commits · 戴 / test

drivers/platform/x86/Kconfig

+11 −0

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		@@ -1263,6 +1263,17 @@ config INTEL_CHTDC_TI_PWRBTN
		To compile this driver as a module, choose M here: the module
		will be called intel_chtdc_ti_pwrbtn.

		config INTEL_MRFLD_PWRBTN
		tristate "Intel Merrifield Basin Cove power button driver"
		depends on INTEL_SOC_PMIC_MRFLD
		depends on INPUT
		---help---
		This option adds a power button driver for Basin Cove PMIC
		on Intel Merrifield devices.

		To compile this driver as a module, choose M here: the module
		will be called intel_mrfld_pwrbtn.

		config I2C_MULTI_INSTANTIATE
		tristate "I2C multi instantiate pseudo device driver"
		depends on I2C && ACPI

drivers/platform/x86/Makefile

+1 −0

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		@@ -94,6 +94,7 @@ obj-$(CONFIG_PMC_ATOM) += pmc_atom.o
		obj-$(CONFIG_MLX_PLATFORM) += mlx-platform.o
		obj-$(CONFIG_INTEL_TURBO_MAX_3) += intel_turbo_max_3.o
		obj-$(CONFIG_INTEL_CHTDC_TI_PWRBTN) += intel_chtdc_ti_pwrbtn.o
		obj-$(CONFIG_INTEL_MRFLD_PWRBTN) += intel_mrfld_pwrbtn.o
		obj-$(CONFIG_I2C_MULTI_INSTANTIATE) += i2c-multi-instantiate.o
		obj-$(CONFIG_INTEL_ATOMISP2_PM) += intel_atomisp2_pm.o
		obj-$(CONFIG_PCENGINES_APU2) += pcengines-apuv2.o

drivers/platform/x86/intel_mrfld_pwrbtn.c

0 → 100644

+107 −0

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		// SPDX-License-Identifier: GPL-2.0
		/*
		* Power-button driver for Basin Cove PMIC
		*
		* Copyright (c) 2019, Intel Corporation.
		* Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
		*/

		#include <linux/input.h>
		#include <linux/interrupt.h>
		#include <linux/device.h>
		#include <linux/mfd/intel_soc_pmic.h>
		#include <linux/mfd/intel_soc_pmic_mrfld.h>
		#include <linux/module.h>
		#include <linux/platform_device.h>
		#include <linux/pm_wakeirq.h>
		#include <linux/slab.h>

		#define BCOVE_PBSTATUS 0x27
		#define BCOVE_PBSTATUS_PBLVL BIT(4) /* 1 - release, 0 - press */

		static irqreturn_t mrfld_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);
		unsigned int state;
		int ret;

		ret = regmap_read(regmap, BCOVE_PBSTATUS, &state);
		if (ret)
		return IRQ_NONE;

		dev_dbg(dev, "PBSTATUS=0x%x\n", state);
		input_report_key(input, KEY_POWER, !(state & BCOVE_PBSTATUS_PBLVL));
		input_sync(input);

		regmap_update_bits(regmap, BCOVE_MIRQLVL1, BCOVE_LVL1_PWRBTN, 0);
		return IRQ_HANDLED;
		}

		static int mrfld_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, ret;

		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->dev.parent = dev;
		input_set_capability(input, EV_KEY, KEY_POWER);
		ret = input_register_device(input);
		if (ret)
		return ret;

		dev_set_drvdata(dev, pmic->regmap);

		ret = devm_request_threaded_irq(dev, irq, NULL, mrfld_pwrbtn_interrupt,
		IRQF_ONESHOT \| IRQF_SHARED, pdev->name,
		input);
		if (ret)
		return ret;

		regmap_update_bits(pmic->regmap, BCOVE_MIRQLVL1, BCOVE_LVL1_PWRBTN, 0);
		regmap_update_bits(pmic->regmap, BCOVE_MPBIRQ, BCOVE_PBIRQ_PBTN, 0);

		device_init_wakeup(dev, true);
		dev_pm_set_wake_irq(dev, irq);
		return 0;
		}

		static int mrfld_pwrbtn_remove(struct platform_device *pdev)
		{
		struct device *dev = &pdev->dev;

		dev_pm_clear_wake_irq(dev);
		device_init_wakeup(dev, false);
		return 0;
		}

		static const struct platform_device_id mrfld_pwrbtn_id_table[] = {
		{ .name = "mrfld_bcove_pwrbtn" },
		{}
		};
		MODULE_DEVICE_TABLE(platform, mrfld_pwrbtn_id_table);

		static struct platform_driver mrfld_pwrbtn_driver = {
		.driver = {
		.name = "mrfld_bcove_pwrbtn",
		},
		.probe = mrfld_pwrbtn_probe,
		.remove = mrfld_pwrbtn_remove,
		.id_table = mrfld_pwrbtn_id_table,
		};
		module_platform_driver(mrfld_pwrbtn_driver);

		MODULE_DESCRIPTION("Power-button driver for Basin Cove PMIC");
		MODULE_LICENSE("GPL v2");

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