From patchwork Thu Jan 27 11:15:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mattijs Korpershoek X-Patchwork-Id: 537195 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2774FC43219 for ; Thu, 27 Jan 2022 11:15:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240104AbiA0LPt (ORCPT ); Thu, 27 Jan 2022 06:15:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60156 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240094AbiA0LPs (ORCPT ); Thu, 27 Jan 2022 06:15:48 -0500 Received: from mail-wr1-x42e.google.com (mail-wr1-x42e.google.com [IPv6:2a00:1450:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C36CAC061747 for ; Thu, 27 Jan 2022 03:15:47 -0800 (PST) Received: by mail-wr1-x42e.google.com with SMTP id e8so4211042wrc.0 for ; Thu, 27 Jan 2022 03:15:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=VzOY5Y5ZARqurJbCJsGMa8NafX+eYNxiUqkqBIajbmE=; b=l3ZHQo1J5kr4npk8zAwtX7izKmqxleBFRCpR19Y/bz4iG9xephAo6pg9JVFT81OP+b rIcvTURY7QYKWctSXvaT5YO25L+NCMZBxlHIiiYxHY1yrdtd3kMv2cp5Je//viZq6CRb SsTJy3Wso+DFVP7TxcLV3JPf9lHwuEEykZPUF+p64/Zysqe/+f+b1cdd1JGdPwDRbS31 O6T6KKZDQJt5CTMWYtnOaA1ac7jYF2Rrx438XK4BunBr/g6b3szqfn2em2PED9IYg8Vh f/Wyvt8O0ovIC7kTyCL4pb2igY96oVcBEDvhB0haIVzGF2fTPOQxnYsdxnBJjQnAnG6N NQog== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=VzOY5Y5ZARqurJbCJsGMa8NafX+eYNxiUqkqBIajbmE=; b=NiXfheMmWpKECQs8MyRUcvv1uiQZH5HPFkXA1lyzK+JdgZIxOeuF9Tn6ojcyc+kQ7k XF++k4GR9u/l2SN9nBs12fXjLy4luXZC2q5XuxXqEUtHTipuS6PGBQq42tlELKZ+PtpT c/8mfN9RdKSGqd38AbKxw5oiisgblneWlvZwpRm9Ii4TrwvEOw3YCtRKa0vLq65jtqNq yrbZ6nOt8OpSl2lZuN5AMigMDqZjTpBvzZ9PIbyqYw9ZqxZSY5LYQc4h4W6p3x/P2ltd SeVesa4Db8Jb2S8Kq4+VHHCD74fTNZ9JlkrnRxMKJNA3SoIhDTdHMyQVKOUV3fyIIJah vh6w== X-Gm-Message-State: AOAM532ZrP695+zy9t8asCEAi2cl6kG+qJU6Wh5yFdyelWZDs/ksJI/W LY3iubGZJNj7SZxbqKPyY7pOUQ== X-Google-Smtp-Source: ABdhPJxcHdFgjTbWUKjv+WxRkx0ueHywRrKPEVavDmQGLTncBhVWFjypPFXoeapPc/uNMiStJk+OgA== X-Received: by 2002:adf:ef48:: with SMTP id c8mr2641337wrp.368.1643282146347; Thu, 27 Jan 2022 03:15:46 -0800 (PST) Received: from localhost.localdomain ([2a01:cb19:8b2c:5e00:7d3d:d638:46ec:78dd]) by smtp.gmail.com with ESMTPSA id r7sm5956311wma.39.2022.01.27.03.15.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jan 2022 03:15:46 -0800 (PST) From: Mattijs Korpershoek To: Dmitry Torokhov , Andy Shevchenko , Marco Felsch , Rob Herring , Matthias Brugger , Fengping Yu , Yingjoe Chen Cc: Mattijs Korpershoek , Fabien Parent , Kevin Hilman , linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v20 2/3] Input: mt6779-keypad - Add MediaTek keypad driver Date: Thu, 27 Jan 2022 12:15:25 +0100 Message-Id: <20220127111526.3716689-3-mkorpershoek@baylibre.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220127111526.3716689-1-mkorpershoek@baylibre.com> References: <20220127111526.3716689-1-mkorpershoek@baylibre.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: "fengping.yu" This patch adds matrix keypad support for Mediatek SoCs. Signed-off-by: fengping.yu Reviewed-by: Marco Felsch Reviewed-by: Andy Shevchenko Reviewed-by: Mattijs Korpershoek Signed-off-by: Mattijs Korpershoek --- drivers/input/keyboard/Kconfig | 12 ++ drivers/input/keyboard/Makefile | 1 + drivers/input/keyboard/mt6779-keypad.c | 218 +++++++++++++++++++++++++ 3 files changed, 231 insertions(+) create mode 100644 drivers/input/keyboard/mt6779-keypad.c diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 0c607da9ee10..03a9530f620e 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -779,6 +779,18 @@ config KEYBOARD_BCM To compile this driver as a module, choose M here: the module will be called bcm-keypad. +config KEYBOARD_MT6779 + tristate "MediaTek Keypad Support" + depends on ARCH_MEDIATEK || COMPILE_TEST + select REGMAP_MMIO + select INPUT_MATRIXKMAP + help + Say Y here if you want to use the keypad on MediaTek SoCs. + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called mt6779-keypad. + config KEYBOARD_MTK_PMIC tristate "MediaTek PMIC keys support" depends on MFD_MT6397 diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index e3c8648f834e..721936e90290 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -44,6 +44,7 @@ obj-$(CONFIG_KEYBOARD_MATRIX) += matrix_keypad.o obj-$(CONFIG_KEYBOARD_MAX7359) += max7359_keypad.o obj-$(CONFIG_KEYBOARD_MCS) += mcs_touchkey.o obj-$(CONFIG_KEYBOARD_MPR121) += mpr121_touchkey.o +obj-$(CONFIG_KEYBOARD_MT6779) += mt6779-keypad.o obj-$(CONFIG_KEYBOARD_MTK_PMIC) += mtk-pmic-keys.o obj-$(CONFIG_KEYBOARD_NEWTON) += newtonkbd.o obj-$(CONFIG_KEYBOARD_NOMADIK) += nomadik-ske-keypad.o diff --git a/drivers/input/keyboard/mt6779-keypad.c b/drivers/input/keyboard/mt6779-keypad.c new file mode 100644 index 000000000000..369366f18fd2 --- /dev/null +++ b/drivers/input/keyboard/mt6779-keypad.c @@ -0,0 +1,218 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2022 MediaTek Inc. + * Author Fengping Yu + */ +#include +#include +#include +#include +#include +#include +#include +#include + +#define MTK_KPD_NAME "mt6779-keypad" +#define MTK_KPD_MEM 0x0004 +#define MTK_KPD_DEBOUNCE 0x0018 +#define MTK_KPD_DEBOUNCE_MASK GENMASK(13, 0) +#define MTK_KPD_DEBOUNCE_MAX_MS 256 +#define MTK_KPD_NUM_MEMS 5 +#define MTK_KPD_NUM_BITS 136 /* 4*32+8 MEM5 only use 8 BITS */ + +struct mt6779_keypad { + struct regmap *regmap; + struct input_dev *input_dev; + struct clk *clk; + void __iomem *base; + u32 n_rows; + u32 n_cols; + DECLARE_BITMAP(keymap_state, MTK_KPD_NUM_BITS); +}; + +static const struct regmap_config mt6779_keypad_regmap_cfg = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = sizeof(u32), + .max_register = 36, +}; + +static irqreturn_t mt6779_keypad_irq_handler(int irq, void *dev_id) +{ + struct mt6779_keypad *keypad = dev_id; + unsigned short *keycode = keypad->input_dev->keycode; + DECLARE_BITMAP(new_state, MTK_KPD_NUM_BITS); + DECLARE_BITMAP(change, MTK_KPD_NUM_BITS); + int bit_nr; + int pressed; + unsigned short code; + int row, col; + int row_shift = get_count_order(keypad->n_cols); + + regmap_bulk_read(keypad->regmap, MTK_KPD_MEM, + new_state, MTK_KPD_NUM_MEMS); + + bitmap_xor(change, new_state, keypad->keymap_state, MTK_KPD_NUM_BITS); + + for_each_set_bit(bit_nr, change, MTK_KPD_NUM_BITS) { + /* For 32bits register, only bits [15:0] use to indicate key status */ + if (bit_nr % 32 >= 16) + continue; + + /* 1: not pressed, 0: pressed */ + pressed = !test_bit(bit_nr, new_state); + dev_dbg(&keypad->input_dev->dev, "%s", + pressed ? "pressed" : "released"); + + row = bit_nr / 32; + col = bit_nr % 32; + + code = keycode[MATRIX_SCAN_CODE(row, col, row_shift)]; + + input_report_key(keypad->input_dev, code, pressed); + input_sync(keypad->input_dev); + + dev_dbg(&keypad->input_dev->dev, + "report Linux keycode = %d\n", code); + } + + bitmap_copy(keypad->keymap_state, new_state, MTK_KPD_NUM_BITS); + + return IRQ_HANDLED; +} + +static void mt6779_keypad_clk_disable(void *data) +{ + clk_disable_unprepare(data); +} + +static int mt6779_keypad_pdrv_probe(struct platform_device *pdev) +{ + struct mt6779_keypad *keypad; + unsigned int irq; + u32 debounce; + bool wakeup; + int error; + + keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad), GFP_KERNEL); + if (!keypad) + return -ENOMEM; + + keypad->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(keypad->base)) + return PTR_ERR(keypad->base); + + keypad->regmap = devm_regmap_init_mmio(&pdev->dev, + keypad->base, + &mt6779_keypad_regmap_cfg); + if (IS_ERR(keypad->regmap)) { + dev_err(&pdev->dev, + "regmap init failed:%pe\n", keypad->regmap); + return PTR_ERR(keypad->regmap); + } + + bitmap_fill(keypad->keymap_state, MTK_KPD_NUM_BITS); + + keypad->input_dev = devm_input_allocate_device(&pdev->dev); + if (!keypad->input_dev) { + dev_err(&pdev->dev, "Failed to allocate input dev\n"); + return -ENOMEM; + } + + keypad->input_dev->name = MTK_KPD_NAME; + keypad->input_dev->id.bustype = BUS_HOST; + + error = matrix_keypad_parse_properties(&pdev->dev, &keypad->n_rows, + &keypad->n_cols); + if (error) { + dev_err(&pdev->dev, "Failed to parse keypad params\n"); + return error; + } + + if (device_property_read_u32(&pdev->dev, "debounce-delay-ms", + &debounce)) + debounce = 16; + + if (debounce > MTK_KPD_DEBOUNCE_MAX_MS) { + dev_err(&pdev->dev, "Debounce time exceeds the maximum allowed time %dms\n", + MTK_KPD_DEBOUNCE_MAX_MS); + return -EINVAL; + } + + wakeup = device_property_read_bool(&pdev->dev, "wakeup-source"); + + dev_dbg(&pdev->dev, "n_row=%d n_col=%d debounce=%d\n", + keypad->n_rows, keypad->n_cols, debounce); + + error = matrix_keypad_build_keymap(NULL, NULL, + keypad->n_rows, + keypad->n_cols, + NULL, + keypad->input_dev); + if (error) { + dev_err(&pdev->dev, "Failed to build keymap\n"); + return error; + } + + regmap_write(keypad->regmap, MTK_KPD_DEBOUNCE, + (debounce * 32) & MTK_KPD_DEBOUNCE_MASK); + + keypad->clk = devm_clk_get(&pdev->dev, "kpd"); + if (IS_ERR(keypad->clk)) + return PTR_ERR(keypad->clk); + + error = clk_prepare_enable(keypad->clk); + if (error) { + dev_err(&pdev->dev, "cannot prepare/enable keypad clock\n"); + return error; + } + + error = devm_add_action_or_reset(&pdev->dev, mt6779_keypad_clk_disable, keypad->clk); + if (error) + return error; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + error = devm_request_threaded_irq(&pdev->dev, irq, + NULL, mt6779_keypad_irq_handler, + IRQF_ONESHOT, + MTK_KPD_NAME, keypad); + if (error) { + dev_err(&pdev->dev, "Failed to request IRQ#%d:%d\n", + irq, error); + return error; + } + + error = input_register_device(keypad->input_dev); + if (error) { + dev_err(&pdev->dev, "Failed to register device\n"); + return error; + } + + error = device_init_wakeup(&pdev->dev, wakeup); + if (error) + dev_warn(&pdev->dev, "device_init_wakeup fail\n"); + + return 0; +} + +static const struct of_device_id mt6779_keypad_of_match[] = { + { .compatible = "mediatek,mt6779-keypad" }, + { .compatible = "mediatek,mt6873-keypad" }, + { /* sentinel */ } +}; + +static struct platform_driver mt6779_keypad_pdrv = { + .probe = mt6779_keypad_pdrv_probe, + .driver = { + .name = MTK_KPD_NAME, + .of_match_table = mt6779_keypad_of_match, + }, +}; +module_platform_driver(mt6779_keypad_pdrv); + +MODULE_AUTHOR("Mediatek Corporation"); +MODULE_DESCRIPTION("MTK Keypad (KPD) Driver"); +MODULE_LICENSE("GPL");