From patchwork Thu Oct 12 16:27:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshul Dalal X-Patchwork-Id: 733013 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 93322CDB46E for ; Thu, 12 Oct 2023 16:29:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347319AbjJLQ3G (ORCPT ); Thu, 12 Oct 2023 12:29:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43736 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347163AbjJLQ3F (ORCPT ); Thu, 12 Oct 2023 12:29:05 -0400 Received: from mail-pl1-x62e.google.com (mail-pl1-x62e.google.com [IPv6:2607:f8b0:4864:20::62e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 712AFA9; Thu, 12 Oct 2023 09:29:01 -0700 (PDT) Received: by mail-pl1-x62e.google.com with SMTP id d9443c01a7336-1c9c5a1b87bso9702925ad.3; Thu, 12 Oct 2023 09:29:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1697128141; x=1697732941; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=fpenc3TC1wxTiSmB6vD1Cx4tRH9i7lUBaz0u5rLStfY=; b=eYdN0SOKdzSYfnVLup0EWHcWxlXi+6TP6ygo0yAQkgCOcXr/sg9YEPK2jRTJTh9SEN ZyCkKLgh8kyAaMJI6RYeZ4P/gop7Dp/D4ib9nJ9OQIYIl8tIn9Xtj+LnNJlGKmZyYL3z gJbxo5lLDnN6cnUJxD8ize3EbdBPbva0lMmWE8VfNNOwzeRcJ2f8cFhZgy0llBsiOpwc lBAV0h1hgx1/WFTjL+tYcaoX+gi3dzQtJUyPxqlMJuIGtouJbQ5cT0EZ4ZzACc3s/4Jk WuaRYY10A+bS5canucz/Ms28kad3onE+LvKEQPsbd4FPELZd7D0yJONY+S7J04Ezl04i CTpg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697128141; x=1697732941; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=fpenc3TC1wxTiSmB6vD1Cx4tRH9i7lUBaz0u5rLStfY=; b=Z7c24/DvQCQL4bg0myiPQermFCg4SJmZbFJzEwrRpt72vitg7ZdSuyUcIKzdQCEgnE eJLMZymMUe1E0brR0zjKo8TR+0TOwZ1U71vdmWNdBxcWqCk1DdHCBQEWy3dYRxTK1x4E FjYoR8cVQeWfuzlej+LsrYMwuDklsge11IffM1E5d/vgdWzB0PNCwAoGlyjtTX5rZfXQ ezBrZS5dhC1RaJ/gs7pxWuL7xYgUJJ6OgTvDtP3hXVknoht982W1VE5+UA43TiBNOotZ Z41asGGY6c/G6ckspAMgZhmwNyTnaDz916VODkwZFpkS7ich+IbN1i1sfAyP6o4ZFhof +YUw== X-Gm-Message-State: AOJu0YzCaLt4ucWpWeyjV9nTghWC75NkATcqX+uei/FwvADGPPDtizbh B52a/civNIdhUH9dhSRfGAejLaOuC2lIu77C X-Google-Smtp-Source: AGHT+IFkWga7vo54OSr36L35yv47ognTjOFByF3OqK3ls8hf+tjE4WBSr1/XuS8nDNuwW3ZC7sFLJA== X-Received: by 2002:a17:902:8f8b:b0:1c1:eb8b:79a6 with SMTP id z11-20020a1709028f8b00b001c1eb8b79a6mr21673887plo.24.1697128140627; Thu, 12 Oct 2023 09:29:00 -0700 (PDT) Received: from localhost.localdomain ([49.37.136.12]) by smtp.gmail.com with ESMTPSA id f9-20020a170902ce8900b001bb9f104328sm2181575plg.146.2023.10.12.09.28.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Oct 2023 09:29:00 -0700 (PDT) From: Anshul Dalal To: linux-input@vger.kernel.org, devicetree@vger.kernel.org Cc: Anshul Dalal , Dmitry Torokhov , Rob Herring , Krzysztof Kozlowski , Conor Dooley , =?utf-8?q?Thomas_Wei=C3=9Fschuh?= , Shuah Khan , linux-kernel-mentees@lists.linuxfoundation.org, linux-kernel@vger.kernel.org, Conor Dooley , Krzysztof Kozlowski Subject: [PATCH v5 1/2] dt-bindings: input: bindings for Adafruit Seesaw Gamepad Date: Thu, 12 Oct 2023 21:57:55 +0530 Message-ID: <20231012162759.691555-1-anshulusr@gmail.com> X-Mailer: git-send-email 2.42.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Adds bindings for the Adafruit Seesaw Gamepad. The gamepad functions as an i2c device with the default address of 0x50 and has an IRQ pin that can be enabled in the driver to allow for a rising edge trigger on each button press or joystick movement. Product page: https://www.adafruit.com/product/5743 Arduino driver: https://github.com/adafruit/Adafruit_Seesaw Reviewed-by: Conor Dooley Reviewed-by: Krzysztof Kozlowski Signed-off-by: Anshul Dalal --- Changes for v5: - Added link to the datasheet Changes for v4: - Fixed the URI for the id field - Added `interrupts` property Changes for v3: - Updated id field to reflect updated file name from previous version - Added `reg` property Changes for v2: - Renamed file to `adafruit,seesaw-gamepad.yaml` - Removed quotes for `$id` and `$schema` - Removed "Bindings for" from the description - Changed node name to the generic name "joystick" - Changed compatible to 'adafruit,seesaw-gamepad' instead of 'adafruit,seesaw_gamepad' .../input/adafruit,seesaw-gamepad.yaml | 60 +++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/adafruit,seesaw-gamepad.yaml diff --git a/Documentation/devicetree/bindings/input/adafruit,seesaw-gamepad.yaml b/Documentation/devicetree/bindings/input/adafruit,seesaw-gamepad.yaml new file mode 100644 index 000000000000..3f0d1c5a3b9b --- /dev/null +++ b/Documentation/devicetree/bindings/input/adafruit,seesaw-gamepad.yaml @@ -0,0 +1,60 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/input/adafruit,seesaw-gamepad.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Adafruit Mini I2C Gamepad with seesaw + +maintainers: + - Anshul Dalal + +description: | + Adafruit Mini I2C Gamepad + + +-----------------------------+ + | ___ | + | / \ (X) | + | | S | __ __ (Y) (A) | + | \___/ |ST| |SE| (B) | + | | + +-----------------------------+ + + S -> 10-bit percision bidirectional analog joystick + ST -> Start + SE -> Select + X, A, B, Y -> Digital action buttons + + Datasheet: https://cdn-learn.adafruit.com/downloads/pdf/gamepad-qt.pdf + Product page: https://www.adafruit.com/product/5743 + Arduino Driver: https://github.com/adafruit/Adafruit_Seesaw + +properties: + compatible: + const: adafruit,seesaw-gamepad + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + description: + The gamepad's IRQ pin triggers a rising edge if interrupts are enabled. + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + joystick@50 { + compatible = "adafruit,seesaw-gamepad"; + reg = <0x50>; + }; + }; From patchwork Thu Oct 12 16:27:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Anshul Dalal X-Patchwork-Id: 733500 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 D5D3FCDB47E for ; Thu, 12 Oct 2023 16:29:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1379548AbjJLQ3L (ORCPT ); Thu, 12 Oct 2023 12:29:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45380 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1379552AbjJLQ3K (ORCPT ); Thu, 12 Oct 2023 12:29:10 -0400 Received: from mail-pl1-x635.google.com (mail-pl1-x635.google.com [IPv6:2607:f8b0:4864:20::635]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A90DBC0; 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Thu, 12 Oct 2023 09:29:04 -0700 (PDT) From: Anshul Dalal To: linux-input@vger.kernel.org, devicetree@vger.kernel.org Cc: Anshul Dalal , Dmitry Torokhov , Rob Herring , Krzysztof Kozlowski , Conor Dooley , =?utf-8?q?Thomas_Wei=C3=9Fschuh?= , Shuah Khan , linux-kernel-mentees@lists.linuxfoundation.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 2/2] input: joystick: driver for Adafruit Seesaw Gamepad Date: Thu, 12 Oct 2023 21:57:56 +0530 Message-ID: <20231012162759.691555-2-anshulusr@gmail.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231012162759.691555-1-anshulusr@gmail.com> References: <20231012162759.691555-1-anshulusr@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Adds a driver for a mini gamepad that communicates over i2c, the gamepad has bidirectional thumb stick input and six buttons. The gamepad chip utilizes the open framework from Adafruit called 'Seesaw' to transmit the ADC data for the joystick and digital pin state for the buttons. I have only implemented the functionality required to receive the thumb stick and button state. Steps in reading the gamepad state over i2c: 1. Reset the registers 2. Set the pin mode of the pins specified by the `BUTTON_MASK` to input `BUTTON_MASK`: A bit-map for the six digital pins internally connected to the joystick buttons. 3. Enable internal pullup resistors for the `BUTTON_MASK` 4. Bulk set the pin state HIGH for `BUTTON_MASK` 5. Poll the device for button and joystick state done by: `seesaw_read_data(struct i2c_client *client, struct seesaw_data *data)` Product page: https://www.adafruit.com/product/5743 Arduino driver: https://github.com/adafruit/Adafruit_Seesaw Driver tested on RPi Zero 2W Reviewed-by: Thomas Weißschuh Signed-off-by: Anshul Dalal --- Changes for v5: - Added link to the datasheet - Added debug log message when `seesaw_read_data` fails Changes for v4: - Changed `1UL << BUTTON_` to BIT(BUTTON_) - Removed `hardware_id` field from `struct seesaw_gamepad` - Removed redundant checks for the number of bytes written and received by `i2c_master_send` and `i2c_master_recv` - Used `get_unaligned_be32` to instantiate `u32 result` from `read_buf` - Changed `result & (1UL << BUTTON_)` to `test_bit(BUTTON_, (long *)&result)` - Changed `KBUILD_MODNAME` in id-tables to `SEESAW_DEVICE_NAME` - Fixed formatting issues - Changed button reporting: Since the gamepad had the action buttons in a non-standard layout: (X) (Y) (A) (B) Therefore moved to using generic directional action button event codes instead of BTN_[ABXY]. Changes for v3: - no updates Changes for v2: adafruit-seesaw.c: - Renamed file from 'adafruit_seesaw.c' - Changed device name from 'seesaw_gamepad' to 'seesaw-gamepad' - Changed count parameter for receiving joystick x on line 118: `2` to `sizeof(write_buf)` - Fixed invalid buffer size on line 123 and 126: `data->y` to `sizeof(data->y)` - Added comment for the `mdelay(10)` on line 169 - Changed inconsistent indentation on line 271 Kconfig: - Fixed indentation for the help text - Updated module name Makefile: - Updated module object file name MAINTAINERS: - Updated file name for the driver and bindings MAINTAINERS | 7 + drivers/input/joystick/Kconfig | 9 + drivers/input/joystick/Makefile | 1 + drivers/input/joystick/adafruit-seesaw.c | 273 +++++++++++++++++++++++ 4 files changed, 290 insertions(+) create mode 100644 drivers/input/joystick/adafruit-seesaw.c diff --git a/MAINTAINERS b/MAINTAINERS index 6c4cce45a09d..a314f9b48e21 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -441,6 +441,13 @@ W: http://wiki.analog.com/AD7879 W: https://ez.analog.com/linux-software-drivers F: drivers/input/touchscreen/ad7879.c +ADAFRUIT MINI I2C GAMEPAD +M: Anshul Dalal +L: linux-input@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/input/adafruit,seesaw-gamepad.yaml +F: drivers/input/joystick/adafruit-seesaw.c + ADDRESS SPACE LAYOUT RANDOMIZATION (ASLR) M: Jiri Kosina S: Maintained diff --git a/drivers/input/joystick/Kconfig b/drivers/input/joystick/Kconfig index ac6925ce8366..df9cd1830b29 100644 --- a/drivers/input/joystick/Kconfig +++ b/drivers/input/joystick/Kconfig @@ -412,4 +412,13 @@ config JOYSTICK_SENSEHAT To compile this driver as a module, choose M here: the module will be called sensehat_joystick. +config JOYSTICK_SEESAW + tristate "Adafruit Mini I2C Gamepad with Seesaw" + depends on I2C + help + Say Y here if you want to use the Adafruit Mini I2C Gamepad. + + To compile this driver as a module, choose M here: the module will be + called adafruit-seesaw. + endif diff --git a/drivers/input/joystick/Makefile b/drivers/input/joystick/Makefile index 3937535f0098..9976f596a920 100644 --- a/drivers/input/joystick/Makefile +++ b/drivers/input/joystick/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_JOYSTICK_N64) += n64joy.o obj-$(CONFIG_JOYSTICK_PSXPAD_SPI) += psxpad-spi.o obj-$(CONFIG_JOYSTICK_PXRC) += pxrc.o obj-$(CONFIG_JOYSTICK_QWIIC) += qwiic-joystick.o +obj-$(CONFIG_JOYSTICK_SEESAW) += adafruit-seesaw.o obj-$(CONFIG_JOYSTICK_SENSEHAT) += sensehat-joystick.o obj-$(CONFIG_JOYSTICK_SIDEWINDER) += sidewinder.o obj-$(CONFIG_JOYSTICK_SPACEBALL) += spaceball.o diff --git a/drivers/input/joystick/adafruit-seesaw.c b/drivers/input/joystick/adafruit-seesaw.c new file mode 100644 index 000000000000..2a1eae8d2861 --- /dev/null +++ b/drivers/input/joystick/adafruit-seesaw.c @@ -0,0 +1,273 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2023 Anshul Dalal + * + * Driver for Adafruit Mini I2C Gamepad + * + * Based on the work of: + * Oleh Kravchenko (Sparkfun Qwiic Joystick driver) + * + * Datasheet: https://cdn-learn.adafruit.com/downloads/pdf/gamepad-qt.pdf + * Product page: https://www.adafruit.com/product/5743 + * Firmware and hardware sources: https://github.com/adafruit/Adafruit_Seesaw + */ + +#include +#include +#include +#include +#include +#include +#include + +/* clang-format off */ +#define SEESAW_DEVICE_NAME "seesaw-gamepad" + +#define SEESAW_STATUS_BASE 0 +#define SEESAW_GPIO_BASE 1 +#define SEESAW_ADC_BASE 9 + +#define SEESAW_GPIO_DIRCLR_BULK 3 +#define SEESAW_GPIO_BULK 4 +#define SEESAW_GPIO_BULK_SET 5 +#define SEESAW_GPIO_PULLENSET 11 + +#define SEESAW_STATUS_HW_ID 1 +#define SEESAW_STATUS_SWRST 127 + +#define SEESAW_ADC_OFFSET 7 + +#define BUTTON_A 5 +#define BUTTON_B 1 +#define BUTTON_X 6 +#define BUTTON_Y 2 +#define BUTTON_START 16 +#define BUTTON_SELECT 0 + +#define ANALOG_X 14 +#define ANALOG_Y 15 + +#define SEESAW_JOYSTICK_MAX_AXIS 1023 +#define SEESAW_JOYSTICK_FUZZ 2 +#define SEESAW_JOYSTICK_FLAT 4 + +#define SEESAW_GAMEPAD_POLL_INTERVAL 16 +#define SEESAW_GAMEPAD_POLL_MIN 8 +#define SEESAW_GAMEPAD_POLL_MAX 32 +/* clang-format on */ + +u32 BUTTON_MASK = BIT(BUTTON_A) | BIT(BUTTON_B) | BIT(BUTTON_X) | + BIT(BUTTON_Y) | BIT(BUTTON_START) | BIT(BUTTON_SELECT); + +struct seesaw_gamepad { + char physical_path[32]; + struct input_dev *input_dev; + struct i2c_client *i2c_client; +}; + +struct seesaw_data { + __be16 x; + __be16 y; + u8 button_a, button_b, button_x, button_y, button_start, button_select; +}; + +static int seesaw_read_data(struct i2c_client *client, struct seesaw_data *data) +{ + int err; + unsigned char write_buf[2] = { SEESAW_GPIO_BASE, SEESAW_GPIO_BULK }; + unsigned char read_buf[4]; + + err = i2c_master_send(client, write_buf, sizeof(write_buf)); + if (err < 0) + return err; + err = i2c_master_recv(client, read_buf, sizeof(read_buf)); + if (err < 0) + return err; + + u32 result = get_unaligned_be32(&read_buf); + + data->button_a = !test_bit(BUTTON_A, (long *)&result); + data->button_b = !test_bit(BUTTON_B, (long *)&result); + data->button_x = !test_bit(BUTTON_X, (long *)&result); + data->button_y = !test_bit(BUTTON_Y, (long *)&result); + data->button_start = !test_bit(BUTTON_START, (long *)&result); + data->button_select = !test_bit(BUTTON_SELECT, (long *)&result); + + write_buf[0] = SEESAW_ADC_BASE; + write_buf[1] = SEESAW_ADC_OFFSET + ANALOG_X; + err = i2c_master_send(client, write_buf, sizeof(write_buf)); + if (err < 0) + return err; + err = i2c_master_recv(client, (char *)&data->x, sizeof(data->x)); + if (err < 0) + return err; + /* + * ADC reads left as max and right as 0, must be reversed since kernel + * expects reports in opposite order. + */ + data->x = SEESAW_JOYSTICK_MAX_AXIS - be16_to_cpu(data->x); + + write_buf[1] = SEESAW_ADC_OFFSET + ANALOG_Y; + err = i2c_master_send(client, write_buf, sizeof(write_buf)); + if (err < 0) + return err; + err = i2c_master_recv(client, (char *)&data->y, sizeof(data->y)); + if (err < 0) + return err; + data->y = be16_to_cpu(data->y); + + return 0; +} + +static void seesaw_poll(struct input_dev *input) +{ + struct seesaw_gamepad *private = input_get_drvdata(input); + struct seesaw_data data; + int err; + + err = seesaw_read_data(private->i2c_client, &data); + if (err != 0) { + dev_dbg(&input->dev, "failed to read joystick state: %d\n", + err); + return; + } + + input_report_abs(input, ABS_X, data.x); + input_report_abs(input, ABS_Y, data.y); + input_report_key(input, BTN_EAST, data.button_a); + input_report_key(input, BTN_SOUTH, data.button_b); + input_report_key(input, BTN_NORTH, data.button_x); + input_report_key(input, BTN_WEST, data.button_y); + input_report_key(input, BTN_START, data.button_start); + input_report_key(input, BTN_SELECT, data.button_select); + input_sync(input); +} + +static int seesaw_probe(struct i2c_client *client) +{ + int err; + struct seesaw_gamepad *private; + unsigned char register_reset[] = { SEESAW_STATUS_BASE, + SEESAW_STATUS_SWRST, 0xFF }; + unsigned char get_hw_id[] = { SEESAW_STATUS_BASE, SEESAW_STATUS_HW_ID }; + + err = i2c_master_send(client, register_reset, sizeof(register_reset)); + if (err < 0) + return err; + + /* Wait for the registers to reset before proceeding */ + mdelay(10); + + private = devm_kzalloc(&client->dev, sizeof(*private), GFP_KERNEL); + if (!private) + return -ENOMEM; + + err = i2c_master_send(client, get_hw_id, sizeof(get_hw_id)); + if (err < 0) + return err; + + unsigned char hardware_id; + + err = i2c_master_recv(client, &hardware_id, 1); + if (err < 0) + return err; + + dev_dbg(&client->dev, "Adafruit Seesaw Gamepad, Hardware ID: %02x\n", + hardware_id); + + private->i2c_client = client; + scnprintf(private->physical_path, sizeof(private->physical_path), + "i2c/%s", dev_name(&client->dev)); + i2c_set_clientdata(client, private); + + private->input_dev = devm_input_allocate_device(&client->dev); + if (!private->input_dev) + return -ENOMEM; + + private->input_dev->id.bustype = BUS_I2C; + private->input_dev->name = "Adafruit Seesaw Gamepad"; + private->input_dev->phys = private->physical_path; + input_set_drvdata(private->input_dev, private); + input_set_abs_params(private->input_dev, ABS_X, 0, + SEESAW_JOYSTICK_MAX_AXIS, SEESAW_JOYSTICK_FUZZ, + SEESAW_JOYSTICK_FLAT); + input_set_abs_params(private->input_dev, ABS_Y, 0, + SEESAW_JOYSTICK_MAX_AXIS, SEESAW_JOYSTICK_FUZZ, + SEESAW_JOYSTICK_FLAT); + input_set_capability(private->input_dev, EV_KEY, BTN_EAST); + input_set_capability(private->input_dev, EV_KEY, BTN_SOUTH); + input_set_capability(private->input_dev, EV_KEY, BTN_NORTH); + input_set_capability(private->input_dev, EV_KEY, BTN_WEST); + input_set_capability(private->input_dev, EV_KEY, BTN_START); + input_set_capability(private->input_dev, EV_KEY, BTN_SELECT); + + err = input_setup_polling(private->input_dev, seesaw_poll); + if (err) { + dev_err(&client->dev, "failed to set up polling: %d\n", err); + return err; + } + + input_set_poll_interval(private->input_dev, + SEESAW_GAMEPAD_POLL_INTERVAL); + input_set_max_poll_interval(private->input_dev, + SEESAW_GAMEPAD_POLL_MAX); + input_set_min_poll_interval(private->input_dev, + SEESAW_GAMEPAD_POLL_MIN); + + err = input_register_device(private->input_dev); + if (err) { + dev_err(&client->dev, "failed to register joystick: %d\n", err); + return err; + } + + /* Set Pin Mode to input and enable pull-up resistors */ + unsigned char pin_mode[] = { SEESAW_GPIO_BASE, SEESAW_GPIO_DIRCLR_BULK, + BUTTON_MASK >> 24, BUTTON_MASK >> 16, + BUTTON_MASK >> 8, BUTTON_MASK }; + err = i2c_master_send(client, pin_mode, sizeof(pin_mode)); + if (err < 0) + return err; + pin_mode[1] = SEESAW_GPIO_PULLENSET; + err = i2c_master_send(client, pin_mode, sizeof(pin_mode)); + if (err < 0) + return err; + pin_mode[1] = SEESAW_GPIO_BULK_SET; + err = i2c_master_send(client, pin_mode, sizeof(pin_mode)); + if (err < 0) + return err; + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id of_seesaw_match[] = { + { + .compatible = "adafruit,seesaw-gamepad", + }, + { /* Sentinel */ } +}; +MODULE_DEVICE_TABLE(of, of_seesaw_match); +#endif /* CONFIG_OF */ + +/* clang-format off */ +static const struct i2c_device_id seesaw_id_table[] = { + { SEESAW_DEVICE_NAME, 0 }, + { /* Sentinel */ } +}; +/* clang-format on */ + +MODULE_DEVICE_TABLE(i2c, seesaw_id_table); + +static struct i2c_driver seesaw_driver = { + .driver = { + .name = SEESAW_DEVICE_NAME, + .of_match_table = of_match_ptr(of_seesaw_match), + }, + .id_table = seesaw_id_table, + .probe = seesaw_probe, +}; +module_i2c_driver(seesaw_driver); + +MODULE_AUTHOR("Anshul Dalal "); +MODULE_DESCRIPTION("Adafruit Mini I2C Gamepad driver"); +MODULE_LICENSE("GPL");