From patchwork Fri May 13 15:18:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mattijs Korpershoek X-Patchwork-Id: 12848998 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 EFFD8C433F5 for ; Fri, 13 May 2022 15:18:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1381069AbiEMPS4 (ORCPT ); Fri, 13 May 2022 11:18:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36716 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1379690AbiEMPSy (ORCPT ); Fri, 13 May 2022 11:18:54 -0400 Received: from mail-wr1-x430.google.com (mail-wr1-x430.google.com [IPv6:2a00:1450:4864:20::430]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0626865D3D for ; Fri, 13 May 2022 08:18:53 -0700 (PDT) Received: by mail-wr1-x430.google.com with SMTP id f2so4861422wrc.0 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=0aGt93WD/Gw+VAIkhV373DiILc/lCxcTzfZLnwjkUPW2g2PPPQZ4GbFNLQWQ6qQDqB E9u0HGeYIrdluV4nUAEm4rcxg27chbFW2l/nHLIlU9HBnXQtvD8OfvfnQz7szTnJ93W1 SrOSDHW3CDAof//tPeBFrfnGhyGAqILvakOX4tUFh986mTt0V1DTpvOABJ+H7iwZpuJ+ qaO1bDpzEb/mOqx8NjEBeL8j2owg4dGAAaCRiB4n2Vht1gsNAOGbGArchEoakdv3t4ch lC1cvOD27IzOBhIXa5GUCDzSxGkevFQsqj/VNzxA4w0MpBHL2J/7cR+o91Gsphp8S0kA I+6A== X-Gm-Message-State: AOAM5301XViMHBH2O2WkTQRfxb69bCiP33FHc2O/01iIrkDRJ1H1MB3Y LlnhqRgO59ISW8Nhokajpn5jQg== 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 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org 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 = code / 9; -> col = 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/keyboard/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_cfg = { .max_register = 36, }; +/* + * | 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 = bit_nr / 9; + *col = bit_nr % 3; +} + static irqreturn_t mt6779_keypad_irq_handler(int irq, void *dev_id) { struct mt6779_keypad *keypad = dev_id; @@ -61,8 +74,7 @@ static irqreturn_t mt6779_keypad_irq_handler(int irq, void *dev_id) if (bit_nr % 32 >= 16) continue; - row = bit_nr / 32; - col = bit_nr % 32; + bitnr_to_col_row(bit_nr, &col, &row); scancode = MATRIX_SCAN_CODE(row, col, row_shift); /* 1: not pressed, 0: pressed */ pressed = !test_bit(bit_nr, new_state);