This provides a new input driver for supporting the power button on Dollar Cove TI PMIC, found on Cherrytrail-based devices. The patch is based on the original work by Intel, found at: https://github.com/01org/ProductionKernelQuilts Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=193891 Reviewed-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> Acked-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx> Signed-off-by: Takashi Iwai <tiwai@xxxxxxx> --- It seems that Lee forgot to apply this one while he took two other patches through his MFD tree. Since the MFD part was already merged to Linus tree now, it's better to go through platform tree. Could you guys check this one quickly? Thanks! drivers/platform/x86/Kconfig | 11 ++++ drivers/platform/x86/Makefile | 1 + drivers/platform/x86/intel_chtdc_ti_pwrbtn.c | 94 ++++++++++++++++++++++++++++ 3 files changed, 106 insertions(+) create mode 100644 drivers/platform/x86/intel_chtdc_ti_pwrbtn.c diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 344c78f0a5c4..3ed042d13c45 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -1181,6 +1181,17 @@ config SILEAD_DMI with the OS-image for the device. This option supplies the missing information. Enable this for x86 tablets with Silead touchscreens. +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 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_DEVICES config PMC_ATOM diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile index c32b34a72467..4eb0948086ec 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -88,3 +88,4 @@ obj-$(CONFIG_PMC_ATOM) += pmc_atom.o obj-$(CONFIG_MLX_PLATFORM) += mlx-platform.o obj-$(CONFIG_MLX_CPLD_PLATFORM) += mlxcpld-hotplug.o obj-$(CONFIG_INTEL_TURBO_MAX_3) += intel_turbo_max_3.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..ddd5d9027e92 --- /dev/null +++ b/drivers/platform/x86/intel_chtdc_ti_pwrbtn.c @@ -0,0 +1,94 @@ +/* + * Power-button driver for Dollar Cove TI PMIC + * Copyright (C) 2014 Intel Corp + * Copyright (c) 2017 Takashi Iwai <tiwai@xxxxxxx> + */ + +#include <linux/init.h> +#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, + 0, 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"); -- 2.15.0
