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 Signed-off-by: Takashi Iwai <ti...@suse.de> --- drivers/input/keyboard/Kconfig | 7 +++ drivers/input/keyboard/Makefile | 1 + drivers/input/keyboard/dc_ti_pwrbtn.c | 85 +++++++++++++++++++++++++++++++++++ 3 files changed, 93 insertions(+) create mode 100644 drivers/input/keyboard/dc_ti_pwrbtn.c diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 4c4ab1ced235..673748b3cc34 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -756,4 +756,11 @@ config KEYBOARD_BCM To compile this driver as a module, choose M here: the module will be called bcm-keypad. +config KEYBOARD_DC_TI_PWRBTN + tristate "Dollar Cove TI power button driver" + depends on INTEL_SOC_PMIC_DC_TI + help + Say Y here fi you want to have a power button driver for + Dollar Cove TI PMIC. + endif diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index d2338bacdad1..fa473d241e5c 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -66,3 +66,4 @@ obj-$(CONFIG_KEYBOARD_TM2_TOUCHKEY) += tm2-touchkey.o obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o obj-$(CONFIG_KEYBOARD_W90P910) += w90p910_keypad.o +obj-$(CONFIG_KEYBOARD_DC_TI_PWRBTN) += dc_ti_pwrbtn.o diff --git a/drivers/input/keyboard/dc_ti_pwrbtn.c b/drivers/input/keyboard/dc_ti_pwrbtn.c new file mode 100644 index 000000000000..a0900a440c92 --- /dev/null +++ b/drivers/input/keyboard/dc_ti_pwrbtn.c @@ -0,0 +1,85 @@ +/* + * Power button driver for Dollar Cove TI PMIC + * Copyright (C) 2014 Intel Corp + * Copyright (c) 2017 Takashi Iwai <ti...@suse.de> + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/input.h> +#include <linux/mfd/intel_soc_pmic.h> + +#define DC_TI_SIRQ_REG 0x3 +#define SIRQ_PWRBTN_REL (1 << 0) + +#define DRIVER_NAME "dc_ti_pwrbtn" + +static irqreturn_t dc_ti_pwrbtn_interrupt(int irq, void *dev_id) +{ + struct input_dev *pwrbtn_input = dev_id; + struct device *dev = pwrbtn_input->dev.parent; + struct regmap *regmap = dev_get_drvdata(dev); + int state; + + if (!regmap_read(regmap, DC_TI_SIRQ_REG, &state)) { + dev_dbg(dev, "SIRQ_REG=0x%x\n", state); + state &= SIRQ_PWRBTN_REL; + input_event(pwrbtn_input, EV_KEY, KEY_POWER, !state); + input_sync(pwrbtn_input); + } + + return IRQ_HANDLED; +} + +static int dc_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 *pwrbtn_input; + int irq; + int ret; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return -EINVAL; + pwrbtn_input = devm_input_allocate_device(dev); + if (!pwrbtn_input) + return -ENOMEM; + pwrbtn_input->name = pdev->name; + pwrbtn_input->phys = "dc-ti-power/input0"; + pwrbtn_input->id.bustype = BUS_HOST; + pwrbtn_input->dev.parent = dev; + input_set_capability(pwrbtn_input, EV_KEY, KEY_POWER); + ret = input_register_device(pwrbtn_input); + if (ret) + return ret; + + dev_set_drvdata(dev, pmic->regmap); + + ret = devm_request_threaded_irq(dev, irq, NULL, dc_ti_pwrbtn_interrupt, + 0, KBUILD_MODNAME, pwrbtn_input); + if (ret) + return ret; + + ret = enable_irq_wake(irq); + if (ret) + dev_warn(dev, "Can't enable IRQ as wake source: %d\n", ret); + + return 0; +} + +static struct platform_driver dc_ti_pwrbtn_driver = { + .driver = { + .name = DRIVER_NAME, + }, + .probe = dc_ti_pwrbtn_probe, +}; + +module_platform_driver(dc_ti_pwrbtn_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRIVER_NAME); -- 2.14.0
