From patchwork Mon Oct 21 04:11:18 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff LaBundy X-Patchwork-Id: 11201267 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 10CFE13BD for ; Mon, 21 Oct 2019 04:19:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EC69A205ED for ; Mon, 21 Oct 2019 04:19:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726964AbfJUETO (ORCPT ); Mon, 21 Oct 2019 00:19:14 -0400 Received: from p3plsmtpa06-04.prod.phx3.secureserver.net ([173.201.192.105]:37476 "EHLO p3plsmtpa06-04.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726991AbfJUETN (ORCPT ); Mon, 21 Oct 2019 00:19:13 -0400 Received: from localhost.localdomain ([136.49.227.119]) by :SMTPAUTH: with ESMTPSA id MP2oifB4Hr3FgMP2wiDyYZ; Sun, 20 Oct 2019 21:11:55 -0700 From: Jeff LaBundy To: lee.jones@linaro.org, dmitry.torokhov@gmail.com, jdelvare@suse.com, linux@roeck-us.net, thierry.reding@gmail.com, jic23@kernel.org, devicetree@vger.kernel.org Cc: linux-input@vger.kernel.org, linux-hwmon@vger.kernel.org, u.kleine-koenig@pengutronix.de, linux-pwm@vger.kernel.org, knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net, linux-iio@vger.kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, Jeff LaBundy Subject: [PATCH 3/8] input: keyboard: Add support for Azoteq IQS620A/621/622/624/625 Date: Sun, 20 Oct 2019 23:11:18 -0500 Message-Id: <1571631083-4962-4-git-send-email-jeff@labundy.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1571631083-4962-1-git-send-email-jeff@labundy.com> References: <1571631083-4962-1-git-send-email-jeff@labundy.com> X-CMAE-Envelope: MS4wfHgxhpxOVl0sALoZoA5HsFO3L9Mj3gSzZVCLSbFPlJqMRwR8ooEuKlOzqivzxzqXzaiokgLTt9eKu+jn/l2HytxV5V1di+q19UWLTKvkHB7IqpT/P+ic plZ/Jz32pOBr955CqXKo2WrAQQ+wDeB3zAlW73sJyxpC2iHwMXLM+MDjh1eobGL2H8r9XxppN7/84zmDYiZvka5GgrkRId069DskElr6YuK9XHGiA4IhgZho QRDQ83tzp/zep0K5olNEIRZ68d5rigb0EOnqEjVzu7f/6DHDZfHgtf2PDCkoLyWPR0cMCiganLvXlBqHuJoQdHrUVlklz2Ag0+JPRTuVKMxV+AIcqt2f1Urb du44eEo/L9w8RbGrcM2i8zygqlcEYe7SMcLMRUqSXsejoAuI97XR9erXQaRASzFxED2qpVfbc+5bnhhOmu5/N9oMmoOGLufh+zbl4FYTjXxbKatzMJSIgjOA XO/QYvKyxueUe6Nw91t6eIVQpd2ZET4Y1zTN1PkUCwfrAg89pY+NPPPMoysv46LTwZJ+dImLMePGj3Rk8sreoqporqi/b69RUS4iXNA8GFEWpVfznRWSpSPR bzAKjO1euOk17MHIxCfkQeKcmQkXVIKNUwM96vUR2NhE5LX3vNX9O7/UlHGb+5rcm2KgUYK06xGQS9rF3NLCK3IHMeYovJP2XDe+Qj8Xfe/g4AlINAghHn8K URDrlhPx0ZztWlVtK4JNsaqCdplhoo10eE1YIJncUNe3Ma8kwT4Fjg== Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org This patch adds touch key support for six-channel members of the Azoteq ProxFusion family of sensor devices. Signed-off-by: Jeff LaBundy --- drivers/input/keyboard/Kconfig | 10 ++ drivers/input/keyboard/Makefile | 1 + drivers/input/keyboard/iqs62x-keys.c | 340 +++++++++++++++++++++++++++++++++++ 3 files changed, 351 insertions(+) create mode 100644 drivers/input/keyboard/iqs62x-keys.c diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 8911bc2..ab10aff 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -657,6 +657,16 @@ config KEYBOARD_IPAQ_MICRO To compile this driver as a module, choose M here: the module will be called ipaq-micro-keys. +config KEYBOARD_IQS62X + tristate "Azoteq IQS620A/621/622/624/625 touch keys" + depends on MFD_IQS62X + help + Say Y here to enable touch-key support for six-channel members of + the Azoteq ProxFusion family of sensor devices. + + To compile this driver as a module, choose M here: the module will + be called iqs62x-keys. + config KEYBOARD_OMAP tristate "TI OMAP keypad support" depends on ARCH_OMAP1 diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index 9510325..ee85b7f 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_KEYBOARD_TCA8418) += tca8418_keypad.o obj-$(CONFIG_KEYBOARD_HIL) += hil_kbd.o obj-$(CONFIG_KEYBOARD_HIL_OLD) += hilkbd.o obj-$(CONFIG_KEYBOARD_IPAQ_MICRO) += ipaq-micro-keys.o +obj-$(CONFIG_KEYBOARD_IQS62X) += iqs62x-keys.o obj-$(CONFIG_KEYBOARD_IMX) += imx_keypad.o obj-$(CONFIG_KEYBOARD_HP6XX) += jornada680_kbd.o obj-$(CONFIG_KEYBOARD_HP7XX) += jornada720_kbd.o diff --git a/drivers/input/keyboard/iqs62x-keys.c b/drivers/input/keyboard/iqs62x-keys.c new file mode 100644 index 0000000..9d929f1 --- /dev/null +++ b/drivers/input/keyboard/iqs62x-keys.c @@ -0,0 +1,340 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Azoteq IQS620A/621/622/624/625 Touch Keys + * + * Copyright (C) 2019 + * Author: Jeff LaBundy + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +enum { + IQS62X_SW_HALL_N, + IQS62X_SW_HALL_S, +}; + +static const char * const iqs62x_switch_names[] = { + [IQS62X_SW_HALL_N] = "hall_switch_north", + [IQS62X_SW_HALL_S] = "hall_switch_south", +}; + +struct iqs62x_switch_desc { + enum iqs62x_event_flag flag; + unsigned int code; + bool enabled; +}; + +struct iqs62x_keys_private { + struct iqs62x_core *iqs62x; + struct input_dev *input; + struct notifier_block notifier; + struct iqs62x_switch_desc switches[ARRAY_SIZE(iqs62x_switch_names)]; + unsigned int keycode[IQS62X_NUM_KEYS]; + unsigned int keycodemax; + u8 interval; +}; + +static int iqs62x_keys_parse_prop(struct platform_device *pdev, + struct iqs62x_keys_private *iqs62x_keys) +{ + struct device_node *keys_node = pdev->dev.of_node; + struct device_node *hall_node; + unsigned int val; + int ret, i; + + if (!keys_node) + return 0; + + ret = of_property_read_variable_u32_array(keys_node, "linux,keycodes", + iqs62x_keys->keycode, 0, + IQS62X_NUM_KEYS); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to read keycodes: %d\n", ret); + return ret; + } + iqs62x_keys->keycodemax = ret; + + for (i = 0; i < ARRAY_SIZE(iqs62x_keys->switches); i++) { + hall_node = of_get_child_by_name(keys_node, + iqs62x_switch_names[i]); + if (!hall_node) + continue; + + ret = of_property_read_u32(hall_node, "linux,code", &val); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to read switch code: %d\n", + ret); + of_node_put(hall_node); + return ret; + } + + if (of_property_read_bool(hall_node, "azoteq,use-prox")) + iqs62x_keys->switches[i].flag = (i == IQS62X_SW_HALL_N ? + IQS62X_EVENT_HALL_N_P : + IQS62X_EVENT_HALL_S_P); + else + iqs62x_keys->switches[i].flag = (i == IQS62X_SW_HALL_N ? + IQS62X_EVENT_HALL_N_T : + IQS62X_EVENT_HALL_S_T); + + iqs62x_keys->switches[i].code = val; + iqs62x_keys->switches[i].enabled = true; + + of_node_put(hall_node); + } + + return 0; +} + +static int iqs62x_keys_init(struct iqs62x_keys_private *iqs62x_keys) +{ + struct iqs62x_core *iqs62x = iqs62x_keys->iqs62x; + enum iqs62x_event_flag flag; + unsigned int event_mask_reg; + unsigned int event_mask = 0; + unsigned int val; + int error, i; + + switch (iqs62x->dev_desc->prod_num) { + case IQS620_PROD_NUM: + case IQS621_PROD_NUM: + case IQS622_PROD_NUM: + event_mask_reg = IQS620_GLBL_EVENT_MASK; + + /* + * Discreet button, hysteresis and SAR UI flags represent keys + * and are unmasked if mapped to a valid keycode. + */ + for (i = 0; i < iqs62x_keys->keycodemax; i++) { + if (iqs62x_keys->keycode[i] == KEY_RESERVED) + continue; + + if (iqs62x_events[i].reg == IQS62X_EVENT_PROX) + event_mask |= iqs62x->dev_desc->prox_mask; + else if (iqs62x_events[i].reg == IQS62X_EVENT_HYST) + event_mask |= (iqs62x->dev_desc->hyst_mask | + iqs62x->dev_desc->sar_mask); + } + + error = regmap_read(iqs62x->map, iqs62x->dev_desc->hall_flags, + &val); + if (error) + return error; + + /* + * Hall UI flags represent switches and are unmasked if their + * corresponding child nodes are present. + */ + for (i = 0; i < ARRAY_SIZE(iqs62x_keys->switches); i++) { + if (!(iqs62x_keys->switches[i].enabled)) + continue; + + flag = iqs62x_keys->switches[i].flag; + + if (iqs62x_events[flag].reg != IQS62X_EVENT_HALL) + continue; + + event_mask |= iqs62x->dev_desc->hall_mask; + + input_report_switch(iqs62x_keys->input, + iqs62x_keys->switches[i].code, + (val & iqs62x_events[flag].mask) == + iqs62x_events[flag].val); + } + + input_sync(iqs62x_keys->input); + break; + + case IQS624_PROD_NUM: + event_mask_reg = IQS624_HALL_UI; + + /* + * Interval change events represent keys and are unmasked if + * either wheel movement flag is mapped to a valid keycode. + */ + if (iqs62x_keys->keycode[IQS62X_EVENT_WHEEL_UP] != KEY_RESERVED) + event_mask |= IQS624_HALL_UI_INT_EVENT; + + if (iqs62x_keys->keycode[IQS62X_EVENT_WHEEL_DN] != KEY_RESERVED) + event_mask |= IQS624_HALL_UI_INT_EVENT; + + error = regmap_read(iqs62x->map, iqs62x->dev_desc->interval, + &val); + if (error) + return error; + + iqs62x_keys->interval = val; + break; + + default: + return 0; + } + + return regmap_update_bits(iqs62x->map, event_mask_reg, event_mask, 0); +} + +static int iqs62x_keys_notifier(struct notifier_block *notifier, + unsigned long event_flags, void *context) +{ + struct iqs62x_event_data *event_data = context; + struct iqs62x_keys_private *iqs62x_keys; + int error, i; + + iqs62x_keys = container_of(notifier, struct iqs62x_keys_private, + notifier); + + if (event_flags & BIT(IQS62X_EVENT_SYS_RESET)) { + error = iqs62x_keys_init(iqs62x_keys); + if (error) { + dev_err(iqs62x_keys->input->dev.parent, + "Failed to re-initialize device: %d\n", error); + return NOTIFY_BAD; + } + + return NOTIFY_OK; + } + + for (i = 0; i < iqs62x_keys->keycodemax; i++) { + if (iqs62x_events[i].reg == IQS62X_EVENT_WHEEL && + event_data->interval == iqs62x_keys->interval) + continue; + + input_report_key(iqs62x_keys->input, iqs62x_keys->keycode[i], + event_flags & BIT(i)); + } + + for (i = 0; i < ARRAY_SIZE(iqs62x_keys->switches); i++) + if (iqs62x_keys->switches[i].enabled) + input_report_switch(iqs62x_keys->input, + iqs62x_keys->switches[i].code, + event_flags & + BIT(iqs62x_keys->switches[i].flag)); + + input_sync(iqs62x_keys->input); + + if (event_data->interval == iqs62x_keys->interval) + return NOTIFY_OK; + + /* + * Each frame contains at most one wheel event (up or down), in which + * case a full keystroke is emulated. + */ + if (event_flags & BIT(IQS62X_EVENT_WHEEL_UP)) { + input_report_key(iqs62x_keys->input, + iqs62x_keys->keycode[IQS62X_EVENT_WHEEL_UP], + 0); + input_sync(iqs62x_keys->input); + } else if (event_flags & BIT(IQS62X_EVENT_WHEEL_DN)) { + input_report_key(iqs62x_keys->input, + iqs62x_keys->keycode[IQS62X_EVENT_WHEEL_DN], + 0); + input_sync(iqs62x_keys->input); + } + + iqs62x_keys->interval = event_data->interval; + + return NOTIFY_OK; +} + +static int iqs62x_keys_probe(struct platform_device *pdev) +{ + struct iqs62x_core *iqs62x = dev_get_drvdata(pdev->dev.parent); + struct iqs62x_keys_private *iqs62x_keys; + struct input_dev *input; + int error, i; + + iqs62x_keys = devm_kzalloc(&pdev->dev, sizeof(*iqs62x_keys), + GFP_KERNEL); + if (!iqs62x_keys) + return -ENOMEM; + + platform_set_drvdata(pdev, iqs62x_keys); + + error = iqs62x_keys_parse_prop(pdev, iqs62x_keys); + if (error) + return error; + + input = devm_input_allocate_device(&pdev->dev); + if (!input) + return -ENOMEM; + + input->keycodemax = iqs62x_keys->keycodemax; + input->keycode = iqs62x_keys->keycode; + input->keycodesize = sizeof(*iqs62x_keys->keycode); + + input->name = iqs62x->dev_desc->dev_name; + input->id.bustype = BUS_I2C; + + __set_bit(EV_KEY, input->evbit); + + for (i = 0; i < iqs62x_keys->keycodemax; i++) + __set_bit(iqs62x_keys->keycode[i], input->keybit); + + __clear_bit(KEY_RESERVED, input->keybit); + + for (i = 0; i < ARRAY_SIZE(iqs62x_keys->switches); i++) + if (iqs62x_keys->switches[i].enabled) { + __set_bit(EV_SW, input->evbit); + __set_bit(iqs62x_keys->switches[i].code, input->swbit); + } + + iqs62x_keys->iqs62x = iqs62x; + iqs62x_keys->input = input; + + error = iqs62x_keys_init(iqs62x_keys); + if (error) { + dev_err(&pdev->dev, "Failed to initialize device: %d\n", error); + return error; + } + + error = input_register_device(iqs62x_keys->input); + if (error) { + dev_err(&pdev->dev, "Failed to register device: %d\n", error); + return error; + } + + iqs62x_keys->notifier.notifier_call = iqs62x_keys_notifier; + error = blocking_notifier_chain_register(&iqs62x_keys->iqs62x->nh, + &iqs62x_keys->notifier); + if (error) + dev_err(&pdev->dev, "Failed to register notifier: %d\n", error); + + return error; +} + +static int iqs62x_keys_remove(struct platform_device *pdev) +{ + struct iqs62x_keys_private *iqs62x_keys = platform_get_drvdata(pdev); + int error; + + error = blocking_notifier_chain_unregister(&iqs62x_keys->iqs62x->nh, + &iqs62x_keys->notifier); + if (error) + dev_err(&pdev->dev, + "Failed to unregister notifier: %d\n", error); + + return error; +} + +static struct platform_driver iqs62x_keys_platform_driver = { + .driver = { + .name = IQS62X_DRV_NAME_KEYS, + }, + .probe = iqs62x_keys_probe, + .remove = iqs62x_keys_remove, +}; +module_platform_driver(iqs62x_keys_platform_driver); + +MODULE_AUTHOR("Jeff LaBundy "); +MODULE_DESCRIPTION("Azoteq IQS620A/621/622/624/625 Touch Keys"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" IQS62X_DRV_NAME_KEYS);