From nobody Sun Sep 22 04:55:31 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 ; Fri, 13 May 2022 08:18:53 -0700 (PDT) Received: by mail-wr1-x42c.google.com with SMTP id a5so8075478wrp.7 for ; Fri, 13 May 2022 08:18:53 -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=f2ty6Kirg+4vRs3TX4nTiMefjQ+ct09dXtXeTw7jYik=; b=WbaTQ5aq4Bu4b0YVerwkrsUQ/6yQQDzdf9GHE7o+pCPX8Q9dXiQ6fGs03IGd8ehlpa 4EVY0kMcqYzcn0+9w753EwsvopXpcsahI25DgLj9K4wEDRRTPNaAW1ZUYHB4pFdEs7Jh UVIl8fAA5Phne9mZdSot0U8dIVJ+0Zw8amcpbIPXZsCjJ2BaOe32Jo48dZLzUQdSofO5 PpxtbI9D6eB+BhQxbsVoYb5dXyuVQ3m67ZUGdCeM6/ZFGRFlcEOi9jeQZYsz3GeGUYvj w7VVfb883s0T3tI/Cz5uVe3NmzpDlV2MnZMfWL0F50XN9f7Zr4QQ9tcYc+myg/Ez50qv RnYw== 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=f2ty6Kirg+4vRs3TX4nTiMefjQ+ct09dXtXeTw7jYik=; b=5qFp/jMVtIQwwnH3MbYPtqHdbZFwhTATjRahXQ8hgF1JMDoBnqwZE9Iz5YoqhVKhxs 3YukdhM5NlnWrKO19rBA/feH4IrSiBB19VZihBSEmWWf8w0AHuOGfcAouKBZWdNkSnMj c517vQwiQ8/3PK/dBzb7Qr4x4g4Son0+cL5GMlbqqIQfb/NIlxMGoZwiq+v0ORHIc0qZ pCGC+cVoza18Jtyph2DiAJ39geL3XNHEBUgGKhTOgdSP7/INFp9r5qk+MDW/j2cqwFyb SKZcmkjKAs0f9ONyPTW0l/JWlK5WIWJ5R9vLEjx7aS/Xg1vr+G8bYeWYZE3yzL2/fkwQ mYIw== X-Gm-Message-State: AOAM533D765jOoMNWLos6nbCWd/x5Wnw+sS/7De4ohe6y9sWi5u8o5lr NYm/AFPQPaIeT9pUFPjS4W59Dg== X-Google-Smtp-Source: ABdhPJzGVx2mG3uLphYaJQBr5kbv6MOSDIoEbKda8p2pJEzCBY0bGQx4zlgJAp7c21wm1FvRWpZkKA== X-Received: by 2002:a5d:4f8b:0:b0:20c:6970:fb3c with SMTP id d11-20020a5d4f8b000000b0020c6970fb3cmr4449912wru.554.1652455132391; Fri, 13 May 2022 08:18:52 -0700 (PDT) Received: from groot.home ([2a01:cb19:85e6:1900:9353:61cb:4e25:b9cd]) by smtp.gmail.com with ESMTPSA id b9-20020adfc749000000b0020c6a524fd5sm2800825wrh.99.2022.05.13.08.18.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 May 2022 08:18:52 -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 2/2] Input: mt6779-keypad - implement row/column selection Date: Fri, 13 May 2022 17:18:45 +0200 Message-Id: <20220513151845.2802795-3-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" 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