From 6456fd731517f473eac033f898d40ae76b160183 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Tue, 19 Mar 2019 12:59:56 +0200 Subject: [PATCH] platform/x86: Add support for Basin Cove power button This provides a new input driver for supporting the power button on Basin Cove PMIC, found on Intel Merrifield-based devices. The driver follows the design used in intel_chtdc_ti_pwrbtn.c module. Signed-off-by: Andy Shevchenko --- drivers/platform/x86/Kconfig | 11 +++ drivers/platform/x86/Makefile | 1 + drivers/platform/x86/intel_mrfld_pwrbtn.c | 107 ++++++++++++++++++++++ 3 files changed, 119 insertions(+) create mode 100644 drivers/platform/x86/intel_mrfld_pwrbtn.c diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index a1ed13183559..85b92a95e4c8 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -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 diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile index 86cb76677bc8..87b0069bd781 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -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 diff --git a/drivers/platform/x86/intel_mrfld_pwrbtn.c b/drivers/platform/x86/intel_mrfld_pwrbtn.c new file mode 100644 index 000000000000..d58fea51747e --- /dev/null +++ b/drivers/platform/x86/intel_mrfld_pwrbtn.c @@ -0,0 +1,107 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Power-button driver for Basin Cove PMIC + * + * Copyright (c) 2019, Intel Corporation. + * Author: Andy Shevchenko + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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");