From nobody Sun Sep 22 01:34:26 2024 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 E5003C433F5 for ; Fri, 13 May 2022 15:19:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1381812AbiEMPTA (ORCPT ); Fri, 13 May 2022 11:19:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36676 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377477AbiEMPSy (ORCPT ); Fri, 13 May 2022 11:18:54 -0400 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 04FDD65D32 for ; Fri, 13 May 2022 08:18:53 -0700 (PDT) Received: by mail-wr1-x42e.google.com with SMTP id t6so11890433wra.4 for ; Fri, 13 May 2022 08:18:52 -0700 (PDT) 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=ILXr0TJPBJo0r6+Bn2TlxMvdz9hhu2MSRkeWBLg3s/U=; b=HLD6Co9A73LAXEkw7+pf5QazPc69Bm06mHH6jsxZoX0JxGEgEYzaYyu56Alvyu+0Qt 7PFQjfMia2V+1HGOLGC56uB3KItocMtPicnNQds8cHaoIxgRl8RxEQM18q7Dnm0PPopw pu9sSSMCdD9d08zK0JXdLDAngru3KaGKK7TXryjBh9EVoGJBv+yPX7GKis6MqNc3Nc9f OUSKwsKg9hGxD/hkmkLK6kxmWAQyN1ujJxUVeCeweirF1euA33h4Uhhif6rWjxM0qE7n 1WsnoTM/6xOg67hixrGo+3a7CUqfYPhjHy0GitnM6mu6WGR0Pk6nGNWm+JPibcdI9oJF nJnA== 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=ILXr0TJPBJo0r6+Bn2TlxMvdz9hhu2MSRkeWBLg3s/U=; b=JrKSUAZfOAv6Y9QP9+OwG5DF4KEWN9eZ0dNkdwgJAPmTEDzL+1tBrRwqcWts0s4fXv UJUyP/+K65xhbc73RWKnIVo9huZV9V4SaBiRq9D/GaAv9qvxIXmv/Ly9WNddEoMkg3/d 5ppvPyo93gKJpuZAFNFnL6LipCMrsT2HoBnIqWusdsVjzORxs/QxStPPMoWMk7LVZSpP C/K+E/YHvk5cvQIhGcdRGSUFRQvizzIGYUbXaXe4HCTvgp74klMjDom9C3iqIyTtFgqu BdZ/jTc1YYi1LCsmKhsj5l1nlONVZlzCRYbRbUtGBDfaqAVAjtOORzC5hy4c3HhghKkS sSZg== X-Gm-Message-State: AOAM532BjuHezcpT9/pDkl2Pg+V8wzuQl01W0W7sybtLuttDCQCIq84+ 5MTk+7iLR0BovKcqKypDr0LxcQ== X-Google-Smtp-Source: ABdhPJzKFEfxpnN+vZ4gkOcoP10PztsJZ+L6QlSReHHtgDvmMOwpglZXa0bZZncL5YwfpXGV9OgxEg== X-Received: by 2002:adf:e2cb:0:b0:20c:c1bb:9fcb with SMTP id d11-20020adfe2cb000000b0020cc1bb9fcbmr4435589wrj.35.1652455131503; Fri, 13 May 2022 08:18:51 -0700 (PDT) Received: from groot.home ([2a01:cb19:85e6:1900:9353:61cb:4e25:b9cd]) by smtp.gmail.com with ESMTPSA id b9-20020adfc749000000b0020c6a524fd5sm2800825wrh.99.2022.05.13.08.18.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 May 2022 08:18:51 -0700 (PDT) From: Mattijs Korpershoek To: Dmitry Torokhov Cc: Matthias Brugger , AngeloGioacchino Del Regno , Kevin Hilman , Fabien Parent , linux-input@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mattijs Korpershoek Subject: [RESEND PATCH 1/2] Input: mt6779-keypad - fix hardware code mapping Date: Fri, 13 May 2022 17:18:44 +0200 Message-Id: <20220513151845.2802795-2-mkorpershoek@baylibre.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220513151845.2802795-1-mkorpershoek@baylibre.com> References: <20220513151845.2802795-1-mkorpershoek@baylibre.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" In mt6779_keypad_irq_handler(), we 1. Read a hardware code from KPD_MEM1 -> KPD_MEM5 2. Use that hardware code to compute columns/rows for the standard keyboard matrix. According to the (non-public) datasheet, the map between the hardware code and the cols/rows is: |(0) |(1) |(2) ----*-----*-----*----- | | | |(9) |(10) |(11) ----*-----*-----*----- | | | |(18) |(19) |(20) ----*-----*-----*----- | | | This brings us to another formula: -> row =3D code / 9; -> col =3D code % 3; Implement this mapping in bitnr_to_col_row() to fetch the correct input event from keypad->input_dev->keycode and report that back to userspace. Fixes: f28af984e771 ("Input: mt6779-keypad - add MediaTek keypad driver") Co-developed-by: Fabien Parent Signed-off-by: Fabien Parent Signed-off-by: Mattijs Korpershoek Reviewed-by: AngeloGioacchino Del Regno --- drivers/input/keyboard/mt6779-keypad.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/input/keyboard/mt6779-keypad.c b/drivers/input/keyboar= d/mt6779-keypad.c index 2e7c9187c10f..23360de20da5 100644 --- a/drivers/input/keyboard/mt6779-keypad.c +++ b/drivers/input/keyboard/mt6779-keypad.c @@ -36,6 +36,19 @@ static const struct regmap_config mt6779_keypad_regmap_c= fg =3D { .max_register =3D 36, }; =20 +/* + * | hardware key code | col0 | col1 | col2| + * | ----------------- | -----| ---- | --- | + * | row0 | 0 | 1 | 2 | + * | row1 | 9 | 10 | 11 | + * | row2 | 18 | 19 | 20 | + */ +static void bitnr_to_col_row(int bit_nr, int *col, int *row) +{ + *row =3D bit_nr / 9; + *col =3D bit_nr % 3; +} + static irqreturn_t mt6779_keypad_irq_handler(int irq, void *dev_id) { struct mt6779_keypad *keypad =3D dev_id; @@ -61,8 +74,7 @@ static irqreturn_t mt6779_keypad_irq_handler(int irq, voi= d *dev_id) if (bit_nr % 32 >=3D 16) continue; =20 - row =3D bit_nr / 32; - col =3D bit_nr % 32; + bitnr_to_col_row(bit_nr, &col, &row); scancode =3D MATRIX_SCAN_CODE(row, col, row_shift); /* 1: not pressed, 0: pressed */ pressed =3D !test_bit(bit_nr, new_state); --=20 2.32.0 From nobody Sun Sep 22 01:34:26 2024 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 A7E0AC433F5 for ; Fri, 13 May 2022 15:19:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1381859AbiEMPTS (ORCPT ); Fri, 13 May 2022 11:19:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36748 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1381173AbiEMPS4 (ORCPT ); Fri, 13 May 2022 11:18:56 -0400 Received: from mail-wr1-x42c.google.com (mail-wr1-x42c.google.com [IPv6:2a00:1450:4864:20::42c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DE02B66208 for ; 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charset="utf-8" The MediaTek keypad has a total of 6 input rows and 6 input columns. By default, rows/columns 0-2 are enabled. This is controlled by the KP_SEL register: - bits[9:4] control row selection - bits[15:10] control column selection Each bit enables the corresponding row/column number (e.g KP_SEL[4] enables ROW0) Depending on how the keypad is wired, this may result in wrong readings of the keypad state. Program the KP_SEL register to limit the key detection to n_rows, n_cols we retrieve from the device tree. Signed-off-by: Mattijs Korpershoek --- drivers/input/keyboard/mt6779-keypad.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/input/keyboard/mt6779-keypad.c b/drivers/input/keyboar= d/mt6779-keypad.c index 23360de20da5..653dfc619696 100644 --- a/drivers/input/keyboard/mt6779-keypad.c +++ b/drivers/input/keyboard/mt6779-keypad.c @@ -17,6 +17,11 @@ #define MTK_KPD_DEBOUNCE 0x0018 #define MTK_KPD_DEBOUNCE_MASK GENMASK(13, 0) #define MTK_KPD_DEBOUNCE_MAX_MS 256 +#define MTK_KPD_SEL 0x0020 +#define MTK_KPD_SEL_COL GENMASK(15, 10) +#define MTK_KPD_SEL_ROW GENMASK(9, 4) +#define MTK_KPD_SEL_COLMASK(c) (MTK_KPD_SEL_COL >> (6 - (c))) +#define MTK_KPD_SEL_ROWMASK(r) (MTK_KPD_SEL_ROW >> (6 - (r))) #define MTK_KPD_NUM_MEMS 5 #define MTK_KPD_NUM_BITS 136 /* 4*32+8 MEM5 only use 8 BITS */ =20 @@ -171,6 +176,11 @@ static int mt6779_keypad_pdrv_probe(struct platform_de= vice *pdev) regmap_write(keypad->regmap, MTK_KPD_DEBOUNCE, (debounce * (1 << 5)) & MTK_KPD_DEBOUNCE_MASK); =20 + regmap_update_bits(keypad->regmap, MTK_KPD_SEL, MTK_KPD_SEL_ROW, + MTK_KPD_SEL_ROWMASK(keypad->n_rows)); + regmap_update_bits(keypad->regmap, MTK_KPD_SEL, MTK_KPD_SEL_COL, + MTK_KPD_SEL_COLMASK(keypad->n_cols)); + keypad->clk =3D devm_clk_get(&pdev->dev, "kpd"); if (IS_ERR(keypad->clk)) return PTR_ERR(keypad->clk); --=20 2.32.0