From patchwork Fri Jul 12 09:40:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Alexandre Mergnat X-Patchwork-Id: 11041949 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EA285138B for ; Fri, 12 Jul 2019 09:41:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DA32A28A80 for ; Fri, 12 Jul 2019 09:41:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CEE4B28ABE; Fri, 12 Jul 2019 09:41:42 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BF27528ADC for ; Fri, 12 Jul 2019 09:41:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726880AbfGLJlh (ORCPT ); Fri, 12 Jul 2019 05:41:37 -0400 Received: from mail-wm1-f66.google.com ([209.85.128.66]:33078 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726829AbfGLJl2 (ORCPT ); Fri, 12 Jul 2019 05:41:28 -0400 Received: by mail-wm1-f66.google.com with SMTP id h19so8841038wme.0 for ; Fri, 12 Jul 2019 02:41:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=5t/i/WcvGwyfpdgTajUuRwsLpVeFOZFYkuHu3i+OhN8=; b=vobkhHSsftwgo2Xa12Dw1w6c+Ufilw8Y3RG/uMOsAZeIPeX6q+JlmPZF30FVu71IPF Xp/p4BXu9AqPFRJLi4P0MWU/tKHTvSf8Vw05B3GDH7JFUs4cQvUeS/CMlYZQmMG/5LTS nlT/ecJOSuOm0AX+aIppyVPoilm1mR8psIby7jhiRDLLIdsC4TG6G4bcLBQtftba5GVq 6ckHfka96U+5A8+cCXGqHJnV4nxri1oGUI+Mwg/OTE1IPQ+EKopHwK7BZ9remhJXGY95 0Eb5/jiCAuxSwqvJHZ05HGPsWPDtwqM+AIBTzx1UrGeT/6tH7b28MHaJ9EDkTCLwlbIe uQLw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=5t/i/WcvGwyfpdgTajUuRwsLpVeFOZFYkuHu3i+OhN8=; b=AZ8X6uaNCPQrkDLqkbQjL7mJFZurhWEP/yFT9UlPMop7tuYw0vLpk2vHyCSRld1wG7 Pf7CB7h+ggsowp4M8xd9tL0fePFY5/KQUhyrSPYWnLt2HmoVGCXEbnkZAGyWdogXk8fw sVvD2rAx1eH4jcpO38/7+X5HCkBPVLsNiy0ZTLSlTGM1fXHUoEBAXW3tOrEcOVlsDKTf iCRa487QKHX80/q2HkpwApjGEU6QAVjij6VAzBsdOGfuBHtY9vdYA2zvdn5+0BwSv52k nBxoFgVFCpnUsSBJHJttmDiroZLrSDgOcUpLSXa3E9AK4ZzknhFCevx1Vlv1VyYx78We PpjQ== X-Gm-Message-State: APjAAAUmQK/nMaijJAz9yrWpPNslxBJ+CiKRKygsKxOhxpngvNPzhcN8 qpidNx2EIl/fpK5kuL0v41p3kA== X-Google-Smtp-Source: APXvYqz6ICKagKev7mslCiyA7tBFadahjS6xduWeiON8cv9teXNml079yE9xaaXHWoiy4ZZlHUIXfQ== X-Received: by 2002:a1c:5453:: with SMTP id p19mr8335396wmi.148.1562924484124; Fri, 12 Jul 2019 02:41:24 -0700 (PDT) Received: from pop-os.baylibre.local ([2a01:e35:8ad2:2cb0:2dbb:fac9:5ec0:e3ef]) by smtp.googlemail.com with ESMTPSA id p18sm7310891wrm.16.2019.07.12.02.41.22 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 12 Jul 2019 02:41:23 -0700 (PDT) From: Alexandre Mergnat To: robh+dt@kernel.org, mark.rutland@arm.com, jic23@kernel.org Cc: linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, baylibre-upstreaming@groups.io, dmitry.torokhov@gmail.com, linux-input@vger.kernel.org, Alexandre Mergnat Subject: [PATCH v4 3/3] iio: Add PAT9125 optical tracker sensor Date: Fri, 12 Jul 2019 11:40:50 +0200 Message-Id: <20190712094050.17432-4-amergnat@baylibre.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190712094050.17432-1-amergnat@baylibre.com> References: <20190712094050.17432-1-amergnat@baylibre.com> MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This adds support for PixArt Imaging’s miniature low power optical navigation chip using LASER light source enabling digital surface tracking. Features and datasheet: [0] This IIO driver allows to read relative position from where the system started on X and Y axis through two way: - Punctual "read_raw" which will issue a read in the device registers to get the delta between last/current read and return the addition of all the deltas. - Buffer read. Data can be retrieved using triggered buffer subscription (i.e. iio_readdev). The buffer payload is: |32 bits delta X|32 bits delta Y|timestamp|. The possible I2C addresses are 0x73, 0x75 and 0x79. X and Y axis CPI resolution can be get/set independently through IIO_SCALE. The range value is 0-255 which means: - 0 to ~1,275 Counts Per Inch on flat surface. - 0 to ~630 Counts Per Rev on 1.0mm diameter STS shaft at 1.0mm distance. More details on the datasheet. The "position" directory is added to contain drivers which can provide position data. [0]: http://www.pixart.com/products-detail/72/PAT9125EL-TKIT___TKMT Signed-off-by: Alexandre Mergnat --- drivers/iio/Kconfig | 1 + drivers/iio/Makefile | 1 + drivers/iio/position/Kconfig | 18 ++ drivers/iio/position/Makefile | 6 + drivers/iio/position/pat9125.c | 506 +++++++++++++++++++++++++++++++++ 5 files changed, 532 insertions(+) create mode 100644 drivers/iio/position/Kconfig create mode 100644 drivers/iio/position/Makefile create mode 100644 drivers/iio/position/pat9125.c diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig index 5bd51853b15e..aca6fcbceeab 100644 --- a/drivers/iio/Kconfig +++ b/drivers/iio/Kconfig @@ -85,6 +85,7 @@ source "drivers/iio/light/Kconfig" source "drivers/iio/magnetometer/Kconfig" source "drivers/iio/multiplexer/Kconfig" source "drivers/iio/orientation/Kconfig" +source "drivers/iio/position/Kconfig" if IIO_TRIGGER source "drivers/iio/trigger/Kconfig" endif #IIO_TRIGGER diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile index bff682ad1cfb..1712011c0f4a 100644 --- a/drivers/iio/Makefile +++ b/drivers/iio/Makefile @@ -31,6 +31,7 @@ obj-y += light/ obj-y += magnetometer/ obj-y += multiplexer/ obj-y += orientation/ +obj-y += position/ obj-y += potentiometer/ obj-y += potentiostat/ obj-y += pressure/ diff --git a/drivers/iio/position/Kconfig b/drivers/iio/position/Kconfig new file mode 100644 index 000000000000..1cf28896511c --- /dev/null +++ b/drivers/iio/position/Kconfig @@ -0,0 +1,18 @@ +# +# Optical tracker sensors +# +# When adding new entries keep the list in alphabetical order + +menu "Optical tracker sensors" + +config PAT9125 + tristate "Optical tracker PAT9125 I2C driver" + depends on I2C + select IIO_BUFFER + help + Say yes here to build support for PAT9125 optical tracker + sensors. + + To compile this driver as a module, say M here: the module will + be called pat9125. +endmenu diff --git a/drivers/iio/position/Makefile b/drivers/iio/position/Makefile new file mode 100644 index 000000000000..cf294917ae2c --- /dev/null +++ b/drivers/iio/position/Makefile @@ -0,0 +1,6 @@ +# +# Makefile for industrial I/O Optical tracker sensor drivers +# + +# When adding new entries keep the list in alphabetical order +obj-$(CONFIG_PAT9125) += pat9125.o diff --git a/drivers/iio/position/pat9125.c b/drivers/iio/position/pat9125.c new file mode 100644 index 000000000000..2f04777e0790 --- /dev/null +++ b/drivers/iio/position/pat9125.c @@ -0,0 +1,506 @@ +// SPDX-License-Identifier: (GPL-2.0) +/* + * Copyright (C) 2019 BayLibre, SAS + * Author: Alexandre Mergnat + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* I2C Address function to ID pin*/ +#define PAT9125_I2C_ADDR_HI 0x73 +#define PAT9125_I2C_ADDR_LO 0x75 +#define PAT9125_I2C_ADDR_NC 0x79 + +/* Registers */ +#define PAT9125_PRD_ID1_REG 0x00 +#define PAT9125_PRD_ID2_REG 0x01 +#define PAT9125_MOTION_STATUS_REG 0x02 +#define PAT9125_DELTA_X_LO_REG 0x03 +#define PAT9125_DELTA_Y_LO_REG 0x04 +#define PAT9125_OP_MODE_REG 0x05 +#define PAT9125_CONFIG_REG 0x06 +#define PAT9125_WRITE_PROTEC_REG 0x09 +#define PAT9125_SLEEP1_REG 0x0A +#define PAT9125_SLEEP2_REG 0x0B +#define PAT9125_RES_X_REG 0x0D +#define PAT9125_RES_Y_REG 0x0E +#define PAT9125_DELTA_XY_HI_REG 0x12 +#define PAT9125_SHUTER_REG 0x14 +#define PAT9125_FRAME_AVG_REG 0x17 +#define PAT9125_ORIENTATION_REG 0x19 + +/* Bits */ +#define PAT9125_VALID_MOTION_DATA_BIT BIT(7) +#define PAT9125_RESET_BIT BIT(7) + +/* Registers' values */ +#define PAT9125_SENSOR_ID_VAL 0x31 +#define PAT9125_DISABLE_WRITE_PROTECT_VAL 0x5A +#define PAT9125_ENABLE_WRITE_PROTECT_VAL 0x00 + +/* Default Value of sampled value size */ +#define PAT9125_SAMPLED_VAL_BIT_SIZE 12 + +struct pat9125_data { + struct regmap *regmap; + struct iio_trigger *indio_trig; /* Motion detection */ + s32 position_x; + s32 position_y; + bool sampling; +}; + +static const struct iio_chan_spec pat9125_channels[] = { + { + .type = IIO_DISTANCE, + .modified = 1, + .channel2 = IIO_MOD_X, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + .scan_index = 0, + .scan_type = { + .sign = 's', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_CPU, + }, + }, + { + .type = IIO_DISTANCE, + .modified = 1, + .channel2 = IIO_MOD_Y, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + .scan_index = 1, + .scan_type = { + .sign = 's', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_CPU, + }, + }, + IIO_CHAN_SOFT_TIMESTAMP(2), +}; + +/** + * pat9125_write_pretected_reg() - Write value in protected register. + * + * @regmap: Pointer to I2C register map. + * @reg_addr: Register address. + * @reg_value: Value to be write in register. + * + * A value of zero will be returned on success, a negative errno will + * be returned in error cases. + */ +static int pat9125_write_pretected_reg(struct iio_dev *indio_dev, + u8 reg_addr, u8 reg_value) +{ + struct pat9125_data *data = iio_priv(indio_dev); + int ret; + + ret = regmap_write(data->regmap, + PAT9125_WRITE_PROTEC_REG, + PAT9125_DISABLE_WRITE_PROTECT_VAL); + + if (!ret) + ret = regmap_write(data->regmap, reg_addr, reg_value); + + /* Try to put back write protection everytime */ + ret |= regmap_write(data->regmap, + PAT9125_WRITE_PROTEC_REG, + PAT9125_ENABLE_WRITE_PROTECT_VAL); + + return ret; +} +/** + * pat9125_read_delta() - Read delta value, update delta & position data. + * + * @data: Driver's data structure. + * + * A value of zero will be returned on success, a negative errno will + * be returned in error cases. + */ +static int pat9125_read_delta(struct pat9125_data *data) +{ + struct regmap *regmap = data->regmap; + int status = 0; + int val_x = 0; + int val_y = 0; + int val_high_nibbles = 0; + int ret; + + ret = regmap_read(regmap, PAT9125_MOTION_STATUS_REG, &status); + if (ret < 0) + return ret; + + /* Check if motion is detected */ + if (status & PAT9125_VALID_MOTION_DATA_BIT) { + ret = regmap_read(regmap, PAT9125_DELTA_X_LO_REG, &val_x); + if (ret < 0) + return ret; + + ret = regmap_read(regmap, PAT9125_DELTA_Y_LO_REG, &val_y); + if (ret < 0) + return ret; + + ret = regmap_read(regmap, PAT9125_DELTA_XY_HI_REG, + &val_high_nibbles); + if (ret < 0) + return ret; + + val_x |= (val_high_nibbles << 4) & 0xF00; + val_y |= (val_high_nibbles << 8) & 0xF00; + val_x = sign_extend32(val_x, + PAT9125_SAMPLED_VAL_BIT_SIZE - 1); + val_y = sign_extend32(val_y, + PAT9125_SAMPLED_VAL_BIT_SIZE - 1); + data->position_x += val_x; + data->position_y += val_y; + } + return 0; +} + +/** + * pat9125_read_raw() - Sample and return the value(s) + * function to the associated channel info enum. + * + * @indio_dev: Industrial I/O device. + * @chan: Specification of a single channel. + * @val: Contain the elements making up the returned value. + * @val2: Not used. + * @mask: (enum iio_chan_info_enum) Type of the info attribute. + * + * Zero will be returned on success, negative value otherwise. + **/ +static int pat9125_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct pat9125_data *data = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = pat9125_read_delta(data); + if (ret) + return ret; + switch (chan->channel2) { + case IIO_MOD_X: + *val = data->position_x; + return IIO_VAL_INT; + case IIO_MOD_Y: + *val = data->position_y; + return IIO_VAL_INT; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_SCALE: + switch (chan->channel2) { + case IIO_MOD_X: + ret = regmap_read(data->regmap, PAT9125_RES_X_REG, val); + if (ret) + return ret; + else + return IIO_VAL_INT; + case IIO_MOD_Y: + ret = regmap_read(data->regmap, PAT9125_RES_Y_REG, val); + if (ret) + return ret; + else + return IIO_VAL_INT; + default: + return -EINVAL; + } + default: + return -EINVAL; + } +} + +/** + * pat9125_write_raw() - Write the value(s) + * function to the associated channel info enum. + * + * @indio_dev: Industrial I/O device. + * @chan: Specification of a single channel. + * @val: Value write in the channel. + * @val2: Not used. + * @mask: (enum iio_chan_info_enum) Type of the info attribute. + * + * Zero will be returned on success, negative value otherwise. + **/ +static int pat9125_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, + int val2, long mask) +{ + int ret; + + switch (mask) { + case IIO_CHAN_INFO_SCALE: + switch (chan->channel2) { + case IIO_MOD_X: + ret = pat9125_write_pretected_reg(indio_dev, + PAT9125_RES_X_REG, val); + return ret; + case IIO_MOD_Y: + ret = pat9125_write_pretected_reg(indio_dev, + PAT9125_RES_Y_REG, val); + return ret; + default: + return -EINVAL; + } + default: + return -EINVAL; + } +} + +static irqreturn_t pat9125_threaded_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct pat9125_data *data = iio_priv(indio_dev); + u8 buf[16]; /* Payload: Pos_X (4) | Pos_Y (4) | Timestamp (8) */ + int ret; + s64 timestamp; + + data->sampling = true; + ret = pat9125_read_delta(data); + if (ret) { + dev_err(indio_dev->dev.parent, "Read delta failed %d\n", ret); + return IRQ_NONE; + } + timestamp = iio_get_time_ns(indio_dev); + *((s32 *)&buf[0]) = data->position_x; + *((s32 *)&buf[sizeof(s32)]) = data->position_y; + iio_push_to_buffers_with_timestamp(indio_dev, buf, timestamp); + iio_trigger_notify_done(indio_dev->trig); + return IRQ_HANDLED; +} + +/** + * pat9125_threaded_event_handler() - Threaded motion detection event handler + * @irq: The irq being handled. + * @private: struct iio_device pointer for the device. + */ +static irqreturn_t pat9125_threaded_event_handler(int irq, void *private) +{ + struct iio_dev *indio_dev = private; + struct pat9125_data *data = iio_priv(indio_dev); + + iio_trigger_poll_chained(data->indio_trig); + return IRQ_HANDLED; +} + +/** + * pat9125_buffer_postenable() - Buffer post enable actions + * + * @indio_dev: Industrial I/O device. + */ +static int pat9125_buffer_postenable(struct iio_dev *indio_dev) +{ + struct pat9125_data *data = iio_priv(indio_dev); + int ret = 0; + + ret = iio_triggered_buffer_postenable(indio_dev); + if (ret) + return ret; + + /* Release interrupt pin on the device */ + ret = pat9125_read_delta(data); + + /* iio_trigger_detach_poll_func isn't reachable, so use this function */ + if (ret) + ret = iio_triggered_buffer_predisable(indio_dev); + + return ret; +} + +static const struct iio_buffer_setup_ops pat9125_buffer_ops = { + .postenable = pat9125_buffer_postenable, +}; + +static const struct regmap_config pat9125_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static const struct iio_info pat9125_info = { + .read_raw = pat9125_read_raw, + .write_raw = pat9125_write_raw, +}; + +/* + * To detect if a new value is available, register status is checked. This + * method is safer than using a flag on GPIO IRQ to track event while sampling + * because falling edge is missed when device trig just after a read reg value + * (that happen for fast motions or high CPI setting). + * + * Note: To avoid infinite loop in "iio_trigger_notify_done" when it is not in + * buffer mode and kernel warning due to nested IRQ thread, + * this function must return 0. + */ +static int pat9125_trig_try_reenable(struct iio_trigger *trig) +{ + struct pat9125_data *data = iio_trigger_get_drvdata(trig); + struct regmap *regmap = data->regmap; + int status = 0; + + if (data->sampling) { + regmap_read(regmap, PAT9125_MOTION_STATUS_REG, &status); + if (status & PAT9125_VALID_MOTION_DATA_BIT) { + data->sampling = false; + iio_trigger_poll_chained(data->indio_trig); + return 0; + } + } + data->sampling = false; + return 0; +} + +static const struct iio_trigger_ops pat9125_trigger_ops = { + .try_reenable = pat9125_trig_try_reenable, +}; + +static int pat9125_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct pat9125_data *data; + struct iio_dev *indio_dev; + int ret, sensor_pid; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (!indio_dev) { + dev_err(&client->dev, "IIO device allocation failed\n"); + return -ENOMEM; + } + + data = iio_priv(indio_dev); + indio_dev->dev.parent = &client->dev; + indio_dev->name = id->name; + indio_dev->channels = pat9125_channels; + indio_dev->num_channels = ARRAY_SIZE(pat9125_channels); + indio_dev->info = &pat9125_info; + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev, NULL, + pat9125_threaded_trigger_handler, &pat9125_buffer_ops); + if (ret) { + dev_err(&client->dev, "unable to setup triggered buffer\n"); + return ret; + } + + data->indio_trig = devm_iio_trigger_alloc(&client->dev, "%s-dev%d", + indio_dev->name, indio_dev->id); + if (!data->indio_trig) + return -ENOMEM; + data->indio_trig->dev.parent = &client->dev; + data->indio_trig->ops = &pat9125_trigger_ops; + iio_trigger_set_drvdata(data->indio_trig, data); + ret = devm_iio_trigger_register(&client->dev, data->indio_trig); + if (ret) { + dev_err(&client->dev, "unable to register trigger\n"); + return ret; + } + + data->regmap = devm_regmap_init_i2c(client, &pat9125_regmap_config); + if (IS_ERR(data->regmap)) { + dev_err(&client->dev, "regmap init failed %ld\n", + PTR_ERR(data->regmap)); + return PTR_ERR(data->regmap); + } + + /* Check device ID */ + ret = regmap_read(data->regmap, PAT9125_PRD_ID1_REG, &sensor_pid); + if (ret < 0) { + dev_err(&client->dev, "register 0x%x access failed %d\n", + PAT9125_PRD_ID1_REG, ret); + return ret; + } + if (sensor_pid != PAT9125_SENSOR_ID_VAL) + return -ENODEV; + + /* Switch to bank0 (Magic number)*/ + ret = regmap_write(data->regmap, 0x7F, 0x00); + if (ret < 0) { + dev_err(indio_dev->dev.parent, "register 0x%x access failed %d\n", + 0x7F, ret); + return ret; + } + + /* Software reset */ + ret = regmap_write_bits(data->regmap, + PAT9125_CONFIG_REG, + PAT9125_RESET_BIT, + 1); + if (ret < 0) { + dev_err(&client->dev, "register 0x%x access failed %d\n", + PAT9125_CONFIG_REG, ret); + return ret; + } + + msleep(20); + + /* Init GPIO IRQ */ + if (client->irq) { + ret = devm_request_threaded_irq(&client->dev, + client->irq, + NULL, + pat9125_threaded_event_handler, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + "pat9125", + indio_dev); + if (ret) { + dev_err(&client->dev, "GPIO IRQ init failed\n"); + return ret; + } + } + + ret = devm_iio_device_register(&client->dev, indio_dev); + if (ret) { + dev_err(&client->dev, "IIO device register failed\n"); + return ret; + } + + return 0; +} + +static const struct i2c_device_id pat9125_id[] = { + { "pat9125", 0 }, + {} +}; +MODULE_DEVICE_TABLE(i2c, pat9125_id); + +static const unsigned short normal_i2c[] = { + PAT9125_I2C_ADDR_HI, + PAT9125_I2C_ADDR_LO, + PAT9125_I2C_ADDR_NC, + I2C_CLIENT_END +}; + +static struct i2c_driver pat9125_driver = { + .driver = { + .name = "pat9125", + }, + .probe = pat9125_probe, + .address_list = normal_i2c, + .id_table = pat9125_id, +}; + +module_i2c_driver(pat9125_driver); + +MODULE_AUTHOR("Alexandre Mergnat "); +MODULE_DESCRIPTION("Optical Tracking sensor"); +MODULE_LICENSE("GPL");