From: Steve Twiss <stwiss.opensource@xxxxxxxxxxx> Add OnKey driver support for DA9063 Signed-off-by: Steve Twiss <stwiss.opensource@xxxxxxxxxxx> --- Changes from PATCH V1 to V2 --------------------------- - Remove the circular dependency comment in the main e-mail body linking PATCH V1 1/2 and 2/2 - Alter the copyright header information to match expected GPLv2 text from http://www.gnu.org/licenses/gpl-2.0.html This patch applies against linux-next and v4.0-rc6 MAINTAINERS | 2 +- drivers/input/misc/Kconfig | 10 ++ drivers/input/misc/Makefile | 1 + drivers/input/misc/da9063-onkey.c | 228 ++++++++++++++++++++++++++++++++++++++ drivers/mfd/da9063-core.c | 55 +++++++++ include/linux/mfd/da9063/pdata.h | 1 + 6 files changed, 296 insertions(+), 1 deletion(-) create mode 100644 drivers/input/misc/da9063-onkey.c diff --git a/MAINTAINERS b/MAINTAINERS index 1de6afa..97e20cf 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3138,7 +3138,7 @@ S: Supported F: Documentation/hwmon/da90?? F: drivers/gpio/gpio-da90??.c F: drivers/hwmon/da90??-hwmon.c -F: drivers/input/misc/da90??_onkey.c +F: drivers/input/misc/da90???onkey.c F: drivers/input/touchscreen/da9052_tsi.c F: drivers/leds/leds-da90??.c F: drivers/mfd/da903x.c diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 6deb8da..9d7a79d 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -586,6 +586,16 @@ config INPUT_DA9055_ONKEY To compile this driver as a module, choose M here: the module will be called da9055_onkey. +config INPUT_DA9063_ONKEY + tristate "Dialog DA9063 OnKey" + depends on MFD_DA9063 + help + Support the ONKEY of Dialog DA9063 Power Management IC as an + input device reporting power button statue. + + To compile this driver as a module, choose M here: the module + will be called da9063-onkey. + config INPUT_DM355EVM tristate "TI DaVinci DM355 EVM Keypad and IR Remote" depends on MFD_DM355EVM_MSP diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 403a1a5..50ae57e 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -25,6 +25,7 @@ obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x_i2c.o obj-$(CONFIG_INPUT_COBALT_BTNS) += cobalt_btns.o obj-$(CONFIG_INPUT_DA9052_ONKEY) += da9052_onkey.o obj-$(CONFIG_INPUT_DA9055_ONKEY) += da9055_onkey.o +obj-$(CONFIG_INPUT_DA9063_ONKEY) += da9063-onkey.o obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o obj-$(CONFIG_INPUT_E3X0_BUTTON) += e3x0-button.o obj-$(CONFIG_INPUT_DRV260X_HAPTICS) += drv260x.o diff --git a/drivers/input/misc/da9063-onkey.c b/drivers/input/misc/da9063-onkey.c new file mode 100644 index 0000000..9e41a2d --- /dev/null +++ b/drivers/input/misc/da9063-onkey.c @@ -0,0 +1,228 @@ +/* + * da9063-onkey.c - Onkey device driver for DA9063 + * Copyright (C) 2015 Dialog Semiconductor Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/workqueue.h> +#include <linux/regmap.h> +#include <linux/of.h> +#include <linux/mfd/da9063/core.h> +#include <linux/mfd/da9063/pdata.h> +#include <linux/mfd/da9063/registers.h> + +struct da9063_onkey { + struct da9063 *hw; + struct delayed_work work; + struct input_dev *input; + int irq; + bool key_power; +}; + +static void da9063_poll_on(struct work_struct *work) +{ + struct da9063_onkey *onkey = container_of(work, struct da9063_onkey, + work.work); + unsigned int val; + int fault_log = 0; + bool poll = true; + int ret; + + /* poll to see when the pin is released */ + ret = regmap_read(onkey->hw->regmap, DA9063_REG_STATUS_A, &val); + if (ret < 0) { + dev_err(&onkey->input->dev, + "Failed to read ON status: %d\n", ret); + goto err_poll; + } + + if (!(val & DA9063_NONKEY)) { + ret = regmap_update_bits(onkey->hw->regmap, + DA9063_REG_CONTROL_B, + DA9063_NONKEY_LOCK, 0); + if (ret < 0) { + dev_err(&onkey->input->dev, + "Failed to reset the Key Delay %d\n", ret); + goto err_poll; + } + + input_report_key(onkey->input, KEY_POWER, 0); + input_sync(onkey->input); + + poll = false; + } + + /* if the fault log KEY_RESET is detected, + * then clear it and shutdown via I2C + */ + ret = regmap_read(onkey->hw->regmap, DA9063_REG_FAULT_LOG, &fault_log); + if (ret < 0) + dev_warn(&onkey->input->dev, "Cannot read FAULT_LOG\n"); + + if (fault_log & DA9063_KEY_RESET) { + ret = regmap_write(onkey->hw->regmap, + DA9063_REG_FAULT_LOG, + DA9063_KEY_RESET); + if (ret < 0) + dev_warn(&onkey->input->dev, + "Cannot reset KEY_RESET fault log\n"); + else { + /* at this point we do any S/W housekeeping + * and then send shutdown command + */ + dev_info(&onkey->input->dev, + "Sending SHUTDOWN to DA9063 ...\n"); + ret = regmap_write(onkey->hw->regmap, + DA9063_REG_CONTROL_F, + DA9063_SHUTDOWN); + if (ret < 0) + dev_err(&onkey->input->dev, + "Cannot SHUTDOWN DA9063\n"); + } + } + +err_poll: + if (poll) + schedule_delayed_work(&onkey->work, 50); +} + +static irqreturn_t da9063_onkey_irq_handler(int irq, void *data) +{ + struct da9063_onkey *onkey = data; + unsigned int val; + int ret; + + ret = regmap_read(onkey->hw->regmap, DA9063_REG_STATUS_A, &val); + if (onkey->key_power && (ret >= 0) && (val & DA9063_NONKEY)) { + input_report_key(onkey->input, KEY_POWER, 1); + input_sync(onkey->input); + schedule_delayed_work(&onkey->work, 0); + dev_notice(&onkey->input->dev, "KEY_POWER pressed.\n"); + } else { + input_report_key(onkey->input, KEY_SLEEP, 1); + input_sync(onkey->input); + input_report_key(onkey->input, KEY_SLEEP, 0); + input_sync(onkey->input); + dev_notice(&onkey->input->dev, "KEY_SLEEP pressed.\n"); + } + + return IRQ_HANDLED; +} + +static int da9063_onkey_probe(struct platform_device *pdev) +{ + struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent); + struct da9063_pdata *pdata = dev_get_platdata(da9063->dev); + struct da9063_onkey *onkey; + bool kp_tmp = true; + int ret = 0; + + if (pdata) + kp_tmp = pdata->key_power; + else { + kp_tmp = of_property_read_bool((&pdev->dev)->of_node, + "dlg,disable-key-power"); + kp_tmp = !kp_tmp; + } + + onkey = devm_kzalloc(&pdev->dev, sizeof(struct da9063_onkey), + GFP_KERNEL); + if (!onkey) { + dev_err(&pdev->dev, "Failed to allocate memory.\n"); + ret = -ENOMEM; + goto err; + } + + INIT_DELAYED_WORK(&onkey->work, da9063_poll_on); + + onkey->input = devm_input_allocate_device(&pdev->dev); + if (!onkey->input) { + dev_err(&pdev->dev, "Failed to allocated input device.\n"); + ret = -ENOMEM; + goto err; + } + + ret = platform_get_irq_byname(pdev, "ONKEY"); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to get platform IRQ.\n"); + goto err; + } + onkey->irq = ret; + + ret = request_threaded_irq(onkey->irq, NULL, + da9063_onkey_irq_handler, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + "ONKEY", onkey); + if (ret) { + dev_err(&pdev->dev, + "Failed to request input device IRQ.\n"); + goto err; + } + + onkey->hw = da9063; + onkey->key_power = kp_tmp; + onkey->input->evbit[0] = BIT_MASK(EV_KEY); + onkey->input->name = DA9063_DRVNAME_ONKEY; + onkey->input->phys = DA9063_DRVNAME_ONKEY "/input0"; + onkey->input->dev.parent = &pdev->dev; + + if (onkey->key_power) + input_set_capability(onkey->input, EV_KEY, KEY_POWER); + input_set_capability(onkey->input, EV_KEY, KEY_SLEEP); + + ret = input_register_device(onkey->input); + if (ret) { + dev_err(&pdev->dev, + "Failed to register input device.\n"); + goto err_irq; + } + + platform_set_drvdata(pdev, onkey); + return 0; + +err_irq: + free_irq(onkey->irq, onkey); + cancel_delayed_work_sync(&onkey->work); +err: + return ret; +} + +static int da9063_onkey_remove(struct platform_device *pdev) +{ + struct da9063_onkey *onkey = platform_get_drvdata(pdev); + + free_irq(onkey->irq, onkey); + cancel_delayed_work_sync(&onkey->work); + input_unregister_device(onkey->input); + return 0; +} + +static struct platform_driver da9063_onkey_driver = { + .probe = da9063_onkey_probe, + .remove = da9063_onkey_remove, + .driver = { + .name = DA9063_DRVNAME_ONKEY, + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(da9063_onkey_driver); + +MODULE_AUTHOR("S Twiss <stwiss.opensource@xxxxxxxxxxx>"); +MODULE_DESCRIPTION("Onkey device driver for Dialog DA9063"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DA9063_DRVNAME_ONKEY); diff --git a/drivers/mfd/da9063-core.c b/drivers/mfd/da9063-core.c index facd361..b6d6f18 100644 --- a/drivers/mfd/da9063-core.c +++ b/drivers/mfd/da9063-core.c @@ -60,6 +60,7 @@ static struct resource da9063_rtc_resources[] = { static struct resource da9063_onkey_resources[] = { { + .name = "ONKEY", .start = DA9063_IRQ_ONKEY, .end = DA9063_IRQ_ONKEY, .flags = IORESOURCE_IRQ, @@ -97,6 +98,7 @@ static const struct mfd_cell da9063_devs[] = { .name = DA9063_DRVNAME_ONKEY, .num_resources = ARRAY_SIZE(da9063_onkey_resources), .resources = da9063_onkey_resources, + .of_compatible = "dlg,da9063-onkey", }, { .name = DA9063_DRVNAME_RTC, @@ -109,12 +111,64 @@ static const struct mfd_cell da9063_devs[] = { }, }; +static int da9063_clear_fault_log(struct da9063 *da9063) +{ + int ret = 0; + int fault_log = 0; + + ret = regmap_read(da9063->regmap, DA9063_REG_FAULT_LOG, &fault_log); + if (ret < 0) { + dev_err(da9063->dev, "Cannot read FAULT_LOG.\n"); + return -EIO; + } + + if (fault_log) { + if (fault_log & DA9063_TWD_ERROR) + dev_dbg(da9063->dev, + "Fault log entry detected: DA9063_TWD_ERROR\n"); + if (fault_log & DA9063_POR) + dev_dbg(da9063->dev, + "Fault log entry detected: DA9063_POR\n"); + if (fault_log & DA9063_VDD_FAULT) + dev_dbg(da9063->dev, + "Fault log entry detected: DA9063_VDD_FAULT\n"); + if (fault_log & DA9063_VDD_START) + dev_dbg(da9063->dev, + "Fault log entry detected: DA9063_VDD_START\n"); + if (fault_log & DA9063_TEMP_CRIT) + dev_dbg(da9063->dev, + "Fault log entry detected: DA9063_TEMP_CRIT\n"); + if (fault_log & DA9063_KEY_RESET) + dev_dbg(da9063->dev, + "Fault log entry detected: DA9063_KEY_RESET\n"); + if (fault_log & DA9063_NSHUTDOWN) + dev_dbg(da9063->dev, + "Fault log entry detected: DA9063_NSHUTDOWN\n"); + if (fault_log & DA9063_WAIT_SHUT) + dev_dbg(da9063->dev, + "Fault log entry detected: DA9063_WAIT_SHUT\n"); + } + + ret = regmap_write(da9063->regmap, + DA9063_REG_FAULT_LOG, + fault_log); + if (ret < 0) + dev_err(da9063->dev, + "Cannot reset FAULT_LOG values %d\n", ret); + + return ret; +} + int da9063_device_init(struct da9063 *da9063, unsigned int irq) { struct da9063_pdata *pdata = da9063->dev->platform_data; int model, variant_id, variant_code; int ret; + ret = da9063_clear_fault_log(da9063); + if (ret < 0) + dev_err(da9063->dev, "Cannot clear fault log\n"); + if (pdata) { da9063->flags = pdata->flags; da9063->irq_base = pdata->irq_base; @@ -178,6 +232,7 @@ int da9063_device_init(struct da9063 *da9063, unsigned int irq) if (ret) dev_err(da9063->dev, "Cannot add MFD cells\n"); + return ret; } diff --git a/include/linux/mfd/da9063/pdata.h b/include/linux/mfd/da9063/pdata.h index 95c8742..612383b 100644 --- a/include/linux/mfd/da9063/pdata.h +++ b/include/linux/mfd/da9063/pdata.h @@ -103,6 +103,7 @@ struct da9063; struct da9063_pdata { int (*init)(struct da9063 *da9063); int irq_base; + bool key_power; unsigned flags; struct da9063_regulators_pdata *regulators_pdata; struct led_platform_data *leds_pdata; -- end-of-patch for PATCH V2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
