From patchwork Wed Nov 16 21:16:17 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Knecht X-Patchwork-Id: 13045864 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 64212C43219 for ; Wed, 16 Nov 2022 21:17:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233199AbiKPVQ7 (ORCPT ); Wed, 16 Nov 2022 16:16:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33286 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233358AbiKPVQx (ORCPT ); Wed, 16 Nov 2022 16:16:53 -0500 Received: from msg-2.mailo.com (msg-2.mailo.com [213.182.54.12]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 734E94C252; Wed, 16 Nov 2022 13:16:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=mailoo.org; s=mailo; t=1668633404; bh=6QWf1e37RKMi/NppJ/3MucFfE4jrBDyDhAJ97tQJVK4=; h=X-EA-Auth:From:To:Cc:Subject:Date:Message-Id:X-Mailer:In-Reply-To: References:MIME-Version:Content-Transfer-Encoding; b=D4eEUyrFpZ8MwSnUBuBpszXuvGwqgwUz12uFA1lrUPYUHEwYdPMQm+ziOFGzmKum4 tnTp2hHGarXUr0OrYg/WGHH/kOIzxQzNiIGklD/JSJY7JRhxffGjnAAmSU7kMYuyQ5 TH8yEbuCAqIbJqhfwDxZzaAINyK5Ga9JjUamTnD0= Received: by b-1.in.mailobj.net [192.168.90.11] with ESMTP via proxy.mailoo.org [213.182.55.207] Wed, 16 Nov 2022 22:16:44 +0100 (CET) X-EA-Auth: etheqqxzNFNYrkvcIQ/XJIbcaNqOOYP22hsCy0hlOGv4HajHNvd6SgFJgUhshWnQ4Vl+Z67iBEL0NsVZChOKozKPgNGXUhYLN+wtZs+p9jM= From: Vincent Knecht To: Dmitry Torokhov , Rob Herring , Krzysztof Kozlowski , Vincent Knecht , linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: w.david0@protonmail.com, stephan@gerhold.net, phone-devel@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht Subject: [PATCH v6 2/2] Input: msg2638 - Add support for msg2138 key events Date: Wed, 16 Nov 2022 22:16:17 +0100 Message-Id: <20221116211622.2155747-3-vincent.knecht@mailoo.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221116211622.2155747-1-vincent.knecht@mailoo.org> References: <20221116211622.2155747-1-vincent.knecht@mailoo.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Some devices with msg2138 have back/menu/home keys. Add support for them. Signed-off-by: Vincent Knecht --- drivers/input/touchscreen/msg2638.c | 57 +++++++++++++++++++++++++++-- 1 file changed, 53 insertions(+), 4 deletions(-) diff --git a/drivers/input/touchscreen/msg2638.c b/drivers/input/touchscreen/msg2638.c index 95b18563326a..c5f8174e1685 100644 --- a/drivers/input/touchscreen/msg2638.c +++ b/drivers/input/touchscreen/msg2638.c @@ -21,6 +21,7 @@ #include #include #include +#include #include #include @@ -29,6 +30,8 @@ #define MSG2138_MAX_FINGERS 2 #define MSG2638_MAX_FINGERS 5 +#define MAX_BUTTONS 4 + #define CHIP_ON_DELAY_MS 15 #define FIRMWARE_ON_DELAY_MS 50 #define RESET_DELAY_MIN_US 10000 @@ -72,6 +75,8 @@ struct msg2638_ts_data { struct regulator_bulk_data supplies[2]; struct gpio_desc *reset_gpiod; int max_fingers; + u32 keycodes[MAX_BUTTONS]; + int num_keycodes; }; static u8 msg2638_checksum(u8 *data, u32 length) @@ -85,6 +90,18 @@ static u8 msg2638_checksum(u8 *data, u32 length) return (u8)((-sum) & 0xFF); } +static void msg2138_report_keys(struct msg2638_ts_data *msg2638, u8 keys) +{ + int i; + + /* keys can be 0x00 or 0xff when all keys have been released */ + if (keys == 0xff) + keys = 0; + + for (i = 0; i < msg2638->num_keycodes; ++i) + input_report_key(msg2638->input_dev, msg2638->keycodes[i], keys & BIT(i)); +} + static irqreturn_t msg2138_ts_irq_handler(int irq, void *msg2638_handler) { struct msg2638_ts_data *msg2638 = msg2638_handler; @@ -121,9 +138,12 @@ static irqreturn_t msg2138_ts_irq_handler(int irq, void *msg2638_handler) p0 = &touch_event.pkt[0]; p1 = &touch_event.pkt[1]; - /* Ignore non-pressed finger data */ - if (p0->xy_hi == 0xFF && p0->x_low == 0xFF && p0->y_low == 0xFF) + /* Ignore non-pressed finger data, but check for key code */ + if (p0->xy_hi == 0xFF && p0->x_low == 0xFF && p0->y_low == 0xFF) { + if (p1->xy_hi == 0xFF && p1->y_low == 0xFF) + msg2138_report_keys(msg2638, p1->x_low); goto report; + } x = ((p0->xy_hi & 0xF0) << 4) | p0->x_low; y = ((p0->xy_hi & 0x0F) << 8) | p0->y_low; @@ -283,6 +303,7 @@ static int msg2638_init_input_dev(struct msg2638_ts_data *msg2638) struct device *dev = &msg2638->client->dev; struct input_dev *input_dev; int error; + int i; input_dev = devm_input_allocate_device(dev); if (!input_dev) { @@ -299,6 +320,14 @@ static int msg2638_init_input_dev(struct msg2638_ts_data *msg2638) input_dev->open = msg2638_input_open; input_dev->close = msg2638_input_close; + if (msg2638->num_keycodes) { + input_dev->keycode = msg2638->keycodes; + input_dev->keycodemax = msg2638->num_keycodes; + input_dev->keycodesize = sizeof(msg2638->keycodes[0]); + for (i = 0; i < msg2638->num_keycodes; i++) + input_set_capability(input_dev, EV_KEY, msg2638->keycodes[i]); + } + input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X); input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y); @@ -367,9 +396,23 @@ static int msg2638_ts_probe(struct i2c_client *client) return error; } - error = msg2638_init_input_dev(msg2638); + msg2638->num_keycodes = device_property_count_u32(dev, "linux,keycodes"); + if (msg2638->num_keycodes == -EINVAL) { + msg2638->num_keycodes = 0; + } else if (msg2638->num_keycodes < 0) { + dev_err(dev, "Unable to parse linux,keycodes property: %d\n", + msg2638->num_keycodes); + return msg2638->num_keycodes; + } else if (msg2638->num_keycodes > ARRAY_SIZE(msg2638->keycodes)) { + dev_warn(dev, "Found %d linux,keycodes but max is %zd, ignoring the rest\n", + msg2638->num_keycodes, ARRAY_SIZE(msg2638->keycodes)); + msg2638->num_keycodes = ARRAY_SIZE(msg2638->keycodes); + } + + error = device_property_read_u32_array(dev, "linux,keycodes", msg2638->keycodes, + msg2638->num_keycodes); if (error) { - dev_err(dev, "Failed to initialize input device: %d\n", error); + dev_err(dev, "Unable to read linux,keycodes values: %d\n", error); return error; } @@ -382,6 +425,12 @@ static int msg2638_ts_probe(struct i2c_client *client) return error; } + error = msg2638_init_input_dev(msg2638); + if (error) { + dev_err(dev, "Failed to initialize input device: %d\n", error); + return error; + } + return 0; }