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Tue, 26 Jul 2022 05:56:33 -0700 (PDT) Received: from [192.168.2.253] ([82.66.159.240]) by smtp.gmail.com with ESMTPSA id k1-20020adff5c1000000b0020fff0ea0a3sm14171549wrp.116.2022.07.26.05.56.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Jul 2022 05:56:33 -0700 (PDT) From: Mattijs Korpershoek Date: Tue, 26 Jul 2022 14:56:10 +0200 Subject: [PATCH v2 5/7] Input: mt6779-keypad - support double keys matrix MIME-Version: 1.0 Message-Id: <20220720-mt8183-keypad-v2-5-6d42c357cb76@baylibre.com> References: <20220720-mt8183-keypad-v2-0-6d42c357cb76@baylibre.com> In-Reply-To: <20220720-mt8183-keypad-v2-0-6d42c357cb76@baylibre.com> Cc: linux-arm-kernel@lists.infradead.org, AngeloGioacchino Del Regno , Fabien Parent , linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, Fabien Parent X-Mailer: b4 0.10.0-dev-78725 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220726_055635_232919_A7ABFA1F X-CRM114-Status: GOOD ( 11.02 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org MediaTek keypad has 2 modes of detecting key events: - single key: each (row, column) can detect one key - double key: each (row, column) is a group of 2 keys Double key support exists to minimize cost, since it reduces the number of pins required for physical keys. Double key is configured by setting BIT(0) of the KP_SEL register. Enable double key matrix support based on the mediatek,keys-per-group device tree property. Signed-off-by: Mattijs Korpershoek Reviewed-by: AngeloGioacchino Del Regno diff --git a/drivers/input/keyboard/mt6779-keypad.c b/drivers/input/keyboard/mt6779-keypad.c index 39c931974bde..f70b02396de4 100644 --- a/drivers/input/keyboard/mt6779-keypad.c +++ b/drivers/input/keyboard/mt6779-keypad.c @@ -18,6 +18,7 @@ #define MTK_KPD_DEBOUNCE_MASK GENMASK(13, 0) #define MTK_KPD_DEBOUNCE_MAX_MS 256 #define MTK_KPD_SEL 0x0020 +#define MTK_KPD_SEL_DOUBLE_KP_MODE BIT(0) #define MTK_KPD_SEL_COL GENMASK(15, 10) #define MTK_KPD_SEL_ROW GENMASK(9, 4) #define MTK_KPD_SEL_COLMASK(c) GENMASK((c) + 9, 10) @@ -102,12 +103,21 @@ static void mt6779_keypad_calc_row_col_single(unsigned int key, *col = key % 9; } +static void mt6779_keypad_calc_row_col_double(unsigned int key, + unsigned int *row, + unsigned int *col) +{ + *row = key / 13; + *col = (key % 13) / 2; +} + static int mt6779_keypad_pdrv_probe(struct platform_device *pdev) { struct mt6779_keypad *keypad; void __iomem *base; int irq; u32 debounce; + u32 keys_per_group; bool wakeup; int error; @@ -156,7 +166,20 @@ static int mt6779_keypad_pdrv_probe(struct platform_device *pdev) return -EINVAL; } - keypad->calc_row_col = mt6779_keypad_calc_row_col_single; + if (device_property_read_u32(&pdev->dev, "mediatek,keys-per-group", &keys_per_group)) + keys_per_group = 1; + + switch (keys_per_group) { + case 1: + keypad->calc_row_col = mt6779_keypad_calc_row_col_single; + break; + case 2: + keypad->calc_row_col = mt6779_keypad_calc_row_col_double; + break; + default: + dev_err(&pdev->dev, "Invalid keys-per-group: %d\n", keys_per_group); + return -EINVAL; + } wakeup = device_property_read_bool(&pdev->dev, "wakeup-source"); @@ -176,6 +199,10 @@ static int mt6779_keypad_pdrv_probe(struct platform_device *pdev) regmap_write(keypad->regmap, MTK_KPD_DEBOUNCE, (debounce * (1 << 5)) & MTK_KPD_DEBOUNCE_MASK); + if (keys_per_group == 2) + regmap_update_bits(keypad->regmap, MTK_KPD_SEL, + MTK_KPD_SEL_DOUBLE_KP_MODE, MTK_KPD_SEL_DOUBLE_KP_MODE); + 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,