From patchwork Sat Oct 7 14:40:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshul Dalal X-Patchwork-Id: 730537 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D833C1D6AF for ; Sat, 7 Oct 2023 14:42:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="h3pzDd9A" Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4D3C2B6; Sat, 7 Oct 2023 07:42:20 -0700 (PDT) Received: by mail-pl1-x62f.google.com with SMTP id d9443c01a7336-1bdf4752c3cso21922945ad.2; Sat, 07 Oct 2023 07:42:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1696689739; x=1697294539; 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=5sisTLNnKGsZYfiDDfEHY+RjQwoo26s1ZltAy3XmFO4=; b=h3pzDd9AWBWFb52S6FdyJvBOHL6IX6PMubjYOEsqamdKJAhGtkhQoAmqBZ5/6UN6Yl sluz7xXytXZTJfGVUxIQq35/2LzBY3gbjLKYmQKfXwMoQRrhnhp9Wnt/v5wbK/rjAnVV cWOoVq0UFDcOxHcjtcsyMV4Y7vRerHEUrkETWTeY4SAgAFiMXmJHW4MeZEZBxKk2M2JE Radwr97tTqVUfUC0QQ4/9t0DH6EzbowtgXZIbsYad6VoWb4cjr1WtD22yAvsliAP4QC8 Zw+g7VLfrbCL/2vys+jn8pz1vORDVosh7dxLAFvjQBEw52MJW7/XRg1EViQOGmMWiaVJ QG1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1696689739; x=1697294539; 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=5sisTLNnKGsZYfiDDfEHY+RjQwoo26s1ZltAy3XmFO4=; b=elpmha5T/mKNj8lnLoC+xoxZWDsAZxJsucbKhOSOsHesSRIB60Q4bbWloeLb+HNT2p QvIS800Z7kpgqcGOwyyvSZfiTkza9HZiSXb5zr0sikwzStMpP4a3PD6Q6BudkGdU6xrW u1IY9HT07Ml6DAXM0G6ul2BSHzU1/cDJa0l8ThozlBi+P6JWzOu8uv19XA2uIYvkgb7n L4P92RxoYOMOyoujtxvo2qQWCiYRoxyROtZfuLlQbt8DbhBAp2PKZj9f7iCZiffsIfiv w1CxAnFA7kXgHs5IDfu17WEhsQO4xYV9+sZvTM5qGqm1D2LbHy9jFxSOTjq4jnSbmx5c pvQA== X-Gm-Message-State: AOJu0YxTO7tYwBtEAdJEx3WtKLBF0ILSdxGdnzUYbs0kQusvvYcAfIbP 4SvVC37Y4v2dubCYuA2FmukekSdeBsdwVvhQ X-Google-Smtp-Source: AGHT+IFbKvEVOdRGs5JNmA0gGHPef2pRiPROSvBW0B3aLV4DgVCzu+hGqL8J9kkdoE0uGHJCO1ciFA== X-Received: by 2002:a17:902:dc86:b0:1c3:21ae:7a4a with SMTP id n6-20020a170902dc8600b001c321ae7a4amr10460957pld.38.1696689739354; Sat, 07 Oct 2023 07:42:19 -0700 (PDT) Received: from localhost.localdomain ([2401:4900:6291:4752:3191:cc16:9883:82e9]) by smtp.gmail.com with ESMTPSA id t24-20020a1709028c9800b001c73f51e61csm5962288plo.106.2023.10.07.07.42.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 07 Oct 2023 07:42:18 -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 , Shuah Khan , linux-kernel-mentees@lists.linuxfoundation.org Subject: [PATCH 1/2] dt-bindings: Add bindings for Adafruit Seesaw Gamepad Date: Sat, 7 Oct 2023 20:10:49 +0530 Message-ID: <20231007144052.1535417-1-anshulusr@gmail.com> X-Mailer: git-send-email 2.42.0 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net A simple 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 Tested on RPi Zero 2W Signed-off-by: Anshul Dalal --- .../bindings/input/adafruit_seesaw.yaml | 45 +++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/adafruit_seesaw.yaml diff --git a/Documentation/devicetree/bindings/input/adafruit_seesaw.yaml b/Documentation/devicetree/bindings/input/adafruit_seesaw.yaml new file mode 100644 index 000000000000..1d00d9da637a --- /dev/null +++ b/Documentation/devicetree/bindings/input/adafruit_seesaw.yaml @@ -0,0 +1,45 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/input/adafruit_seesaw.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Adafruit Mini I2C Gamepad with seesaw + +maintainers: + - Anshul Dalal + +description: | + Bindings for 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 + + Product page: https://www.adafruit.com/product/5743 + Arduino Driver: https://github.com/adafruit/Adafruit_Seesaw + +properties: + compatible: + const: adafruit,seesaw_gamepad + +required: + - compatible + +additionalProperties: false + +examples: + - | + seesaw_gamepad@50 { + compatible = "adafruit,seesaw_gamepad"; + reg = <0x50>; + }; From patchwork Sat Oct 7 14:40:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshul Dalal X-Patchwork-Id: 730711 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2050C1D6AF for ; Sat, 7 Oct 2023 14:42:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="kQwp4NVr" Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C6BAEBC; Sat, 7 Oct 2023 07:42:23 -0700 (PDT) Received: by mail-pl1-x62d.google.com with SMTP id d9443c01a7336-1c8a1541232so2404685ad.0; Sat, 07 Oct 2023 07:42:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; 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Sat, 07 Oct 2023 07:42:22 -0700 (PDT) Received: from localhost.localdomain ([2401:4900:6291:4752:3191:cc16:9883:82e9]) by smtp.gmail.com with ESMTPSA id t24-20020a1709028c9800b001c73f51e61csm5962288plo.106.2023.10.07.07.42.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 07 Oct 2023 07:42:22 -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 , Shuah Khan , linux-kernel-mentees@lists.linuxfoundation.org Subject: [PATCH 2/2] input: add Adafruit Seesaw Gamepad driver Date: Sat, 7 Oct 2023 20:10:50 +0530 Message-ID: <20231007144052.1535417-2-anshulusr@gmail.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231007144052.1535417-1-anshulusr@gmail.com> References: <20231007144052.1535417-1-anshulusr@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net A simple 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 Tested on RPi Zero 2W Signed-off-by: Anshul Dalal --- MAINTAINERS | 7 + drivers/input/joystick/Kconfig | 9 + drivers/input/joystick/Makefile | 1 + drivers/input/joystick/adafruit_seesaw.c | 275 +++++++++++++++++++++++ 4 files changed, 292 insertions(+) create mode 100644 drivers/input/joystick/adafruit_seesaw.c diff --git a/MAINTAINERS b/MAINTAINERS index 81d5fc0bba68..cd4f9deb77e2 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.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..b8337edc6e22 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..fdc653209542 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..a04df0469595 --- /dev/null +++ b/drivers/input/joystick/adafruit_seesaw.c @@ -0,0 +1,275 @@ +// 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) + * + * Product page: https://www.adafruit.com/product/5743 + * Firmware and hardware sources: https://github.com/adafruit/Adafruit_Seesaw + */ + +#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 = (1UL << BUTTON_A) | (1UL << BUTTON_B) | (1UL << BUTTON_X) | + (1UL << BUTTON_Y) | (1UL << BUTTON_START) | + (1UL << BUTTON_SELECT); + +struct seesaw_gamepad { + char physical_path[32]; + unsigned char hardware_id; + 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; + if (err != sizeof(write_buf)) + return -EIO; + err = i2c_master_recv(client, read_buf, sizeof(read_buf)); + if (err < 0) + return err; + if (err != sizeof(read_buf)) + return -EIO; + u32 result = ((u32)read_buf[0] << 24) | ((u32)read_buf[1] << 16) | + ((u32)read_buf[2] << 8) | (u32)read_buf[3]; + data->button_a = !(result & (1UL << BUTTON_A)); + data->button_b = !(result & (1UL << BUTTON_B)); + data->button_x = !(result & (1UL << BUTTON_X)); + data->button_y = !(result & (1UL << BUTTON_Y)); + data->button_start = !(result & (1UL << BUTTON_START)); + data->button_select = !(result & (1UL << BUTTON_SELECT)); + + 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; + if (err != sizeof(write_buf)) + return -EIO; + err = i2c_master_recv(client, (char *)&data->x, sizeof(data->x)); + if (err < 0) + return err; + if (err != sizeof(data->x)) + return -EIO; + /* + * 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, 2); + if (err < 0) + return err; + if (err != sizeof(write_buf)) + return -EIO; + err = i2c_master_recv(client, (char *)&data->y, data->y); + if (err < 0) + return err; + if (err != data->y) + return -EIO; + 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) + return; + + input_report_abs(input, ABS_X, data.x); + input_report_abs(input, ABS_Y, data.y); + input_report_key(input, BTN_A, data.button_a); + input_report_key(input, BTN_B, data.button_b); + input_report_key(input, BTN_X, data.button_x); + input_report_key(input, BTN_Y, 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; + if (err != sizeof(register_reset)) + return -EIO; + 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; + if (err != sizeof(get_hw_id)) + return -EIO; + err = i2c_master_recv(client, &private->hardware_id, 1); + if (err < 0) + return err; + if (err != 1) + return -EIO; + + dev_dbg(&client->dev, "Adafruit Seesaw Gamepad, Hardware ID: %02x\n", + private->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_A); + input_set_capability(private->input_dev, EV_KEY, BTN_B); + input_set_capability(private->input_dev, EV_KEY, BTN_X); + input_set_capability(private->input_dev, EV_KEY, BTN_Y); + 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)); + pin_mode[1] = SEESAW_GPIO_PULLENSET; + err |= i2c_master_send(client, pin_mode, sizeof(pin_mode)); + pin_mode[1] = SEESAW_GPIO_BULK_SET; + err |= i2c_master_send(client, pin_mode, sizeof(pin_mode)); + if (err < 0) + return err; + if (err != sizeof(pin_mode)) + return -EIO; + + 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 */ + +static const struct i2c_device_id seesaw_id_table[] = { { KBUILD_MODNAME, 0 }, + { /* Sentinel */ } }; +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");