From patchwork Wed Jan 5 06:03:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nikita Travkin X-Patchwork-Id: 530257 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 16A0CC433F5 for ; Wed, 5 Jan 2022 06:04:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237664AbiAEGEG (ORCPT ); Wed, 5 Jan 2022 01:04:06 -0500 Received: from box.trvn.ru ([194.87.146.52]:55751 "EHLO box.trvn.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237646AbiAEGEE (ORCPT ); Wed, 5 Jan 2022 01:04:04 -0500 Received: from authenticated-user (box.trvn.ru [194.87.146.52]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by box.trvn.ru (Postfix) with ESMTPSA id D1E214207A; Wed, 5 Jan 2022 11:04:01 +0500 (+05) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=trvn.ru; s=mail; t=1641362642; bh=9zCO4y0WdmaObCtQHo6frc57v48/0fUW1a+wyWnbof8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=n/JI8RYKFh1SDIXs72MpT4899WpfohZ47EeNpMDpEPqlGNw4GdTBH7YOgiKEhEkHC DHLC8srTgnxkLCYJuQGQlY2NZgwSL4cuD3iHlRjhbbvUjYgjcy/pe96f9I3nZYFLwU is1Q57W+08o7cadbfaN3xbrVQWfbM6d7yt+7LluICBFj2CLN9FXTxe1ouC8bn1Wf9X hmhS6ONexvn0mCfqw4t9/BhyiWHNNy937N+cmy2UtthBtxDV7VXzWr65abQtZOZL0B 75+4rZxz3StoKcHzxrhbYuyofTeddihuR7j8VbGr+AcI6czHkzXJHr1Dmmei/08iMY 6577a3I7nvhGg== From: Nikita Travkin To: dmitry.torokhov@gmail.com Cc: robh+dt@kernel.org, Michael.Srba@seznam.cz, linus.walleij@linaro.org, broonie@kernel.org, luca@z3ntu.xyz, linux-input@vger.kernel.org, devicetree@vger.kernel.org, phone-devel@vger.kernel.org, linux-kernel@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, Nikita Travkin Subject: [PATCH v2 6/6] input: zinitix: Add touchkey support Date: Wed, 5 Jan 2022 11:03:23 +0500 Message-Id: <20220105060323.7928-7-nikita@trvn.ru> In-Reply-To: <20220105060323.7928-1-nikita@trvn.ru> References: <20220105060323.7928-1-nikita@trvn.ru> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Zinitix touch controllers can use some of the sense lines for virtual keys (like those found on many phones). Add support for those keys. Reviewed-by: Linus Walleij Signed-off-by: Nikita Travkin --- Changes in v2: - Add missing le16_to_cpu() --- drivers/input/touchscreen/zinitix.c | 61 +++++++++++++++++++++++++++-- 1 file changed, 58 insertions(+), 3 deletions(-) diff --git a/drivers/input/touchscreen/zinitix.c b/drivers/input/touchscreen/zinitix.c index 7c82c4f5fa6b..a1c2620507b4 100644 --- a/drivers/input/touchscreen/zinitix.c +++ b/drivers/input/touchscreen/zinitix.c @@ -119,6 +119,7 @@ #define DEFAULT_TOUCH_POINT_MODE 2 #define MAX_SUPPORTED_FINGER_NUM 5 +#define MAX_SUPPORTED_BUTTON_NUM 8 #define CHIP_ON_DELAY 15 // ms #define FIRMWARE_ON_DELAY 40 // ms @@ -146,6 +147,8 @@ struct bt541_ts_data { struct touchscreen_properties prop; struct regulator_bulk_data supplies[2]; u32 zinitix_mode; + u32 keycodes[MAX_SUPPORTED_BUTTON_NUM]; + int num_keycodes; }; static int zinitix_read_data(struct i2c_client *client, @@ -195,6 +198,7 @@ static int zinitix_init_touch(struct bt541_ts_data *bt541) struct i2c_client *client = bt541->client; int i; int error; + u16 int_flags = 0; error = zinitix_write_cmd(client, BT541_SWRESET_CMD); if (error) { @@ -225,6 +229,11 @@ static int zinitix_init_touch(struct bt541_ts_data *bt541) if (error) return error; + error = zinitix_write_u16(client, BT541_BUTTON_SUPPORTED_NUM, + bt541->num_keycodes); + if (error) + return error; + error = zinitix_write_u16(client, BT541_INITIAL_TOUCH_MODE, bt541->zinitix_mode); if (error) @@ -235,9 +244,12 @@ static int zinitix_init_touch(struct bt541_ts_data *bt541) if (error) return error; - error = zinitix_write_u16(client, BT541_INT_ENABLE_FLAG, - BIT_PT_CNT_CHANGE | BIT_DOWN | BIT_MOVE | - BIT_UP); + int_flags = BIT_PT_CNT_CHANGE | BIT_DOWN | BIT_MOVE | BIT_UP; + + if (bt541->num_keycodes) + int_flags |= BIT_ICON_EVENT; + + error = zinitix_write_u16(client, BT541_INT_ENABLE_FLAG, int_flags); if (error) return error; @@ -329,6 +341,15 @@ static void zinitix_report_finger(struct bt541_ts_data *bt541, int slot, input_report_abs(bt541->input_dev, ABS_MT_TOUCH_MAJOR, p->width); } +static void zinitix_report_keys(struct bt541_ts_data *bt541, u16 icon_events) +{ + int i; + + for (i = 0; i < bt541->num_keycodes; i++) + input_report_key(bt541->input_dev, + bt541->keycodes[i], !!(icon_events & BIT(i))); +} + static irqreturn_t zinitix_ts_irq_handler(int irq, void *bt541_handler) { struct bt541_ts_data *bt541 = bt541_handler; @@ -336,6 +357,7 @@ static irqreturn_t zinitix_ts_irq_handler(int irq, void *bt541_handler) struct touch_event touch_event; int error; int i; + __le16 icon_events = 0; memset(&touch_event, 0, sizeof(struct touch_event)); @@ -346,6 +368,17 @@ static irqreturn_t zinitix_ts_irq_handler(int irq, void *bt541_handler) goto out; } + if (touch_event.status & BIT_ICON_EVENT) { + error = zinitix_read_data(bt541->client, BT541_ICON_STATUS_REG, + &icon_events, sizeof(icon_events)); + if (error) { + dev_err(&client->dev, "Failed to read icon events\n"); + goto out; + } + + zinitix_report_keys(bt541, le16_to_cpu(icon_events)); + } + for (i = 0; i < MAX_SUPPORTED_FINGER_NUM; i++) if (touch_event.point_coord[i].sub_status & SUB_BIT_EXIST) zinitix_report_finger(bt541, i, @@ -427,6 +460,7 @@ static int zinitix_init_input_dev(struct bt541_ts_data *bt541) { struct input_dev *input_dev; int error; + int i; input_dev = devm_input_allocate_device(&bt541->client->dev); if (!input_dev) { @@ -444,6 +478,14 @@ static int zinitix_init_input_dev(struct bt541_ts_data *bt541) input_dev->open = zinitix_input_open; input_dev->close = zinitix_input_close; + if (bt541->num_keycodes) { + input_dev->keycode = bt541->keycodes; + input_dev->keycodemax = bt541->num_keycodes; + input_dev->keycodesize = sizeof(bt541->keycodes[0]); + for (i = 0; i < bt541->num_keycodes; i++) + input_set_capability(input_dev, EV_KEY, bt541->keycodes[i]); + } + input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X); input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y); input_set_abs_params(input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); @@ -508,6 +550,19 @@ static int zinitix_ts_probe(struct i2c_client *client) return error; } + bt541->num_keycodes = of_property_read_variable_u32_array( + client->dev.of_node, "linux,keycodes", + bt541->keycodes, 0, + ARRAY_SIZE(bt541->keycodes)); + if (bt541->num_keycodes == -EINVAL) { + bt541->num_keycodes = 0; + } else if (bt541->num_keycodes < 0) { + dev_err(&client->dev, + "Unable to parse \"linux,keycodes\" property: %d\n", + bt541->num_keycodes); + return bt541->num_keycodes; + } + error = zinitix_init_input_dev(bt541); if (error) { dev_err(&client->dev,