From patchwork Tue Nov 19 20:36:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikael Gonella-Bolduc via B4 Relay X-Patchwork-Id: 13880522 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 4410A1D4326; Tue, 19 Nov 2024 20:37:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732048623; cv=none; b=HIyWtrFmo47QlXnapG8Gh1gotQG1sH3OD7uA+J9LTYH2zeTSSB0+wRrQy59b2pWbpmRUq7hsGyns9mr3BLgtPbzjqOn58I6VRn2u7QcUT/3iy0qLIgm0tgGeUU1I9Ix7xOwt1Q+gkT4LbnnGxXuQd/402MJzRLLbwx96yWOFq80= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732048623; c=relaxed/simple; bh=5lIW0YwXLYOCa10VLQaTkKGCRTRK1JhNhTpADvehlko=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=pa3vbxBsgNiis5TEVRnacqG3T3k+4RCaupdIj1UT4sUtpmPgnsgDfzJJ7SwLscj3uLMOaoEAvk0qzxCROnwOuaNqFTvE4JHbvkyosdE0o5d9ZdQ4LpO+s2cZ8zJBOIWOu6bfUspH7mekju1SBY3NXVvyPBcUaKpVhZzsoHRVJX4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=C8+gVGhX; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="C8+gVGhX" Received: by smtp.kernel.org (Postfix) with ESMTPS id EFF10C4AF0C; Tue, 19 Nov 2024 20:37:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1732048623; bh=5lIW0YwXLYOCa10VLQaTkKGCRTRK1JhNhTpADvehlko=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=C8+gVGhXZJ6XtXKuFUEA24En8qmL7JMXmXo7Ad7RVPhb7ettSFWMLSFH+V85i1R5E NhQVf52NBoKGzYiP+llA0K09pdxBg4NG1+aR/gB1at1FnWj1DHUzXATITvDycOkbAR 2aGZfI/m1/Z0RqUKxhOrAgpzckW6iiW79y8hZUuTbY+8/kkX0NSuTxPWhpN9AWjPtj 0LJL2nef8UXfnkJQjixnOSKSbjuKMfZpAaRaSzsRBtNkqPdZAmE42anbmG6YvDkst1 AjkEZ8LPzsP1I+bVF6nmIlRfTvkbvdc+aZ1cvPIdHoQrI2HDykEdYngrOuVZXXLOy1 T43SOOVPZlfqQ== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id E382ED6C295; Tue, 19 Nov 2024 20:37:02 +0000 (UTC) From: Mikael Gonella-Bolduc via B4 Relay Date: Tue, 19 Nov 2024 15:36:57 -0500 Subject: [PATCH 2/2] iio: light: Add APDS9160 ALS & Proximity sensor driver Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241119-apds9160-driver-v1-2-fa00675b4ea4@dimonoff.com> References: <20241119-apds9160-driver-v1-0-fa00675b4ea4@dimonoff.com> In-Reply-To: <20241119-apds9160-driver-v1-0-fa00675b4ea4@dimonoff.com> To: Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt Cc: Mikael Gonella-Bolduc , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, Mikael Gonella-Bolduc , Hugo Villeneuve X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1732048621; l=40802; i=mgonellabolduc@dimonoff.com; s=20241119; h=from:subject:message-id; bh=cZAk092blk8UL49N3xsH/vKhd9LtZFStlQXahFidcQw=; b=466T7qFND3y27dgdfSNI4/mw8vgmuUEiYOvw5lXIs7rWVijtyf6oP2Kus2ln+qDlhieXXqQpw W3gtaJ3D1p8BO4O6fZbnZQHVQ+0o/wJyrCn7Joauz0u0EsayjcYMGYm X-Developer-Key: i=mgonellabolduc@dimonoff.com; a=ed25519; pk=p4tvPfGPfXRyChsgHc6s7HwB6YBl2JqqcP3BXtoDitE= X-Endpoint-Received: by B4 Relay for mgonellabolduc@dimonoff.com/20241119 with auth_id=279 X-Original-From: Mikael Gonella-Bolduc Reply-To: mgonellabolduc@dimonoff.com From: Mikael Gonella-Bolduc APDS9160 is a combination of ALS and proximity sensors. This patch add supports for: - Intensity clear data and illuminance data - Proximity data - Gain control, rate control - Event thresholds Signed-off-by: Mikael Gonella-Bolduc --- MAINTAINERS | 7 + drivers/iio/light/Kconfig | 13 + drivers/iio/light/Makefile | 1 + drivers/iio/light/apds9160.c | 1420 ++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 1441 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index b878ddc99f94e7f6e8fa2c479c5a3f846c514730..5e57b4a19f2eccf317cda62c98d5e7545fdd185b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3694,6 +3694,13 @@ S: Maintained F: Documentation/devicetree/bindings/iio/light/avago,apds9300.yaml F: drivers/iio/light/apds9306.c +AVAGO APDS9160 AMBIENT LIGHT SENSOR AND PROXIMITY DRIVER +M: Mikael Gonella-Bolduc +L: linux-iio@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/iio/light/avago,apds9160.yaml +F: drivers/iio/light/apds9160.c + AVIA HX711 ANALOG DIGITAL CONVERTER IIO DRIVER M: Andreas Klinger L: linux-iio@vger.kernel.org diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig index f2f3e414849ab12a7c0ea2b08e9a3310eb18ebb7..69a59c6759acea89241ab76bfcdfafe3e5824066 100644 --- a/drivers/iio/light/Kconfig +++ b/drivers/iio/light/Kconfig @@ -63,6 +63,19 @@ config AL3320A To compile this driver as a module, choose M here: the module will be called al3320a. +config APDS9160 + tristate "APDS9160 combined als and proximity sensors" + select REGMAP_I2C + select IIO_BUFFER + select IIO_KFIFO_BUF + depends on I2C + help + Say Y here if you want to build a driver for Broadcom APDS9160 + combined ambient light and proximity sensor chip. + + To compile this driver as a module, choose M here: the + module will be called apds9160. If unsure, say N here. + config APDS9300 tristate "APDS9300 ambient light sensor" depends on I2C diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile index 321010fc0b938a9a7fed6d7ec41c718f56fc83a6..6d62571ae2af9bf1edcc77d7ea244a0f10bf7b4c 100644 --- a/drivers/iio/light/Makefile +++ b/drivers/iio/light/Makefile @@ -9,6 +9,7 @@ obj-$(CONFIG_ADJD_S311) += adjd_s311.o obj-$(CONFIG_ADUX1020) += adux1020.o obj-$(CONFIG_AL3010) += al3010.o obj-$(CONFIG_AL3320A) += al3320a.o +obj-$(CONFIG_APDS9160) += apds9160.o obj-$(CONFIG_APDS9300) += apds9300.o obj-$(CONFIG_APDS9306) += apds9306.o obj-$(CONFIG_APDS9960) += apds9960.o diff --git a/drivers/iio/light/apds9160.c b/drivers/iio/light/apds9160.c new file mode 100644 index 0000000000000000000000000000000000000000..cb855f20725dba9fea1390a955889d905fd7eb4f --- /dev/null +++ b/drivers/iio/light/apds9160.c @@ -0,0 +1,1420 @@ +// SPDX-License-Identifier: GPL-2.0 +/** + * This file is part of the APDS9160 sensor driver. + * Chip is combined proximity and ambient light sensor. + * Author: Mikael Gonella-Bolduc + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define APDS9160_DRIVER_NAME "apds9160" +#define APDS9160_REGMAP_NAME "apds9160_regmap" +#define APDS9160_STARTUP_DELAY 25000 /* us */ +#define APDS9160_REG_CNT 37 + +/** Main control register */ +#define APDS9160_REG_CTRL 0x00 +#define APDS9160_REG_CTRL_SWRESET BIT(4) /* 1: Activate reset */ +#define APDS9160_REG_CTRL_MODE_RGB BIT(2) /* 0: ALS & IR, 1: RGB & IR */ +#define APDS9160_REG_CTRL_EN_ALS BIT(1) /* 1: ALS active */ +#define APDS9160_REG_CTLR_EN_PS BIT(0) /* 1: PS active */ + +/** Status register */ +#define APDS9160_REG_SR_LS_INT BIT(3) +#define APDS9160_REG_SR_LS_NEW_DATA BIT(2) +#define APDS9160_REG_SR_PS_INT BIT(1) +#define APDS9160_REG_SR_PS_NEW_DATA BIT(0) + +/* Interrupt configuration register */ +#define APDS9160_REG_INT_CFG 0x19 +#define APDS9160_REG_INT_CFG_EN_LS BIT(2) /* LS int enable */ +#define APDS9160_REG_INT_CFG_EN_PS BIT(0) /* PS int enable */ +#define APDS9160_REG_INT_PST 0x1A + +/* Proximity registers */ +#define APDS9160_REG_PS_LED 0x01 +#define APDS9160_REG_PS_PULSES 0x02 +#define APDS9160_REG_PS_MEAS_RATE 0x03 +#define APDS9160_REG_PS_THRES_HI_LSB 0x1B +#define APDS9160_REG_PS_THRES_HI_MSB 0x1C +#define APDS9160_REG_PS_THRES_LO_LSB 0x1D +#define APDS9160_REG_PS_THRES_LO_MSB 0x1E +#define APDS9160_REG_PS_DATA_LSB 0x08 +#define APDS9160_REG_PS_DATA_MSB 0x09 +#define APDS9160_REG_PS_CAN_LEVEL_DIG_LSB 0x1F +#define APDS9160_REG_PS_CAN_LEVEL_DIG_MSB 0x20 +#define APDS9160_REG_PS_CAN_LEVEL_ANA_DUR 0x21 +#define APDS9160_REG_PS_CAN_LEVEL_ANA_CURRENT 0x22 + +/* Light sensor registers */ +#define APDS9160_REG_LS_MEAS_RATE 0x04 +#define APDS9160_REG_LS_GAIN 0x05 +#define APDS9160_REG_LS_DATA_CLEAR_LSB 0x0A +#define APDS9160_REG_LS_DATA_CLEAR 0x0B +#define APDS9160_REG_LS_DATA_CLEAR_MSB 0x0C +#define APDS9160_REG_LS_DATA_ALS_LSB 0x0D +#define APDS9160_REG_LS_DATA_ALS 0x0E +#define APDS9160_REG_LS_DATA_ALS_MSB 0x0F +#define APDS9160_REG_LS_THRES_UP_LSB 0x24 +#define APDS9160_REG_LS_THRES_UP 0x25 +#define APDS9160_REG_LS_THRES_UP_MSB 0x26 +#define APDS9160_REG_LS_THRES_LO_LSB 0x27 +#define APDS9160_REG_LS_THRES_LO 0x28 +#define APDS9160_REG_LS_THRES_LO_MSB 0x29 +#define APDS9160_REG_LS_THRES_VAR 0x2A + +/** Part identification number register */ +#define APDS9160_REG_ID 0x06 + +/** Status register */ +#define APDS9160_REG_SR 0x07 +#define APDS9160_REG_SR_DATA_ALS BIT(3) +#define APDS9160_REG_SR_DATA_PS BIT(0) + +/* Supported ID:s */ +#define APDS9160_PART_ID_0 0x00 +#define APDS9160_PART_ID_MASK 0xF0 +#define APDS9160_PART_REV_MASK 0x0F + +#define APDS9160_PS_THRES_MAX 0x7FF +#define APDS9160_LS_THRES_MAX 0xFFFFF +#define APDS9160_CMD_LS_RESOLUTION_25MS 0x04 +#define APDS9160_CMD_LS_RESOLUTION_50MS 0x03 +#define APDS9160_CMD_LS_RESOLUTION_100MS 0x02 +#define APDS9160_CMD_LS_RESOLUTION_200MS 0x01 +#define APDS9160_PS_DATA_MASK 0x7FF + +#define APDS9160_DEFAULT_LS_GAIN 3 +#define APDS9160_DEFAULT_LS_RATE 100 +#define APDS9160_DEFAULT_PS_RATE 100 +#define APDS9160_DEFAULT_PS_CANCELLATION_LEVEL 0 +#define APDS9160_DEFAULT_PS_ANALOG_CANCELLATION 0 +#define APDS9160_DEFAULT_PS_GAIN 1 +#define APDS9160_DEFAULT_PS_CURRENT 100 +#define APDS9160_DEFAULT_PS_RESOLUTION 0x03 // 11 bits + +// clang-format off +static const struct reg_default apds9160_reg_defaults[] = { + { APDS9160_REG_CTRL, 0x00 }, /* Sensors disabled by default */ + { APDS9160_REG_PS_LED, 0x33 }, /* 60 kHz frequency, 100 mA pulse current */ + { APDS9160_REG_PS_PULSES, 0x08 }, /* 8 pulses */ + { APDS9160_REG_PS_MEAS_RATE, 0x05 }, + { APDS9160_REG_LS_MEAS_RATE, 0x22 }, + { APDS9160_REG_LS_GAIN, 0x01 }, + { APDS9160_REG_INT_CFG, 0x10 }, + { APDS9160_REG_INT_PST, 0x00 }, + { APDS9160_REG_PS_THRES_HI_LSB, 0xFF }, + { APDS9160_REG_PS_THRES_HI_MSB, 0x07 }, + { APDS9160_REG_PS_THRES_LO_LSB, 0x00 }, + { APDS9160_REG_PS_THRES_LO_MSB, 0x00 }, + { APDS9160_REG_PS_CAN_LEVEL_DIG_LSB, 0x00 }, + { APDS9160_REG_PS_CAN_LEVEL_DIG_MSB, 0x00 }, + { APDS9160_REG_PS_CAN_LEVEL_ANA_DUR, 0x00 }, + { APDS9160_REG_PS_CAN_LEVEL_ANA_CURRENT, 0x00 }, + { APDS9160_REG_LS_THRES_UP_LSB, 0xFF }, + { APDS9160_REG_LS_THRES_UP, 0xFF }, + { APDS9160_REG_LS_THRES_UP_MSB, 0x0F }, + { APDS9160_REG_LS_THRES_LO_LSB, 0x00 }, + { APDS9160_REG_LS_THRES_LO, 0x00 }, + { APDS9160_REG_LS_THRES_LO_MSB, 0x00 }, + { APDS9160_REG_LS_THRES_VAR, 0x00 }, +}; +// clang-format on + +static const struct regmap_range apds9160_readable_ranges[] = { + regmap_reg_range(APDS9160_REG_CTRL, APDS9160_REG_LS_THRES_VAR), +}; + +static const struct regmap_access_table apds9160_readable_table = { + .yes_ranges = apds9160_readable_ranges, + .n_yes_ranges = ARRAY_SIZE(apds9160_readable_ranges), +}; + +static const struct regmap_range apds9160_writeable_ranges[] = { + regmap_reg_range(APDS9160_REG_CTRL, APDS9160_REG_LS_GAIN), + regmap_reg_range(APDS9160_REG_INT_CFG, APDS9160_REG_LS_THRES_VAR), +}; + +static const struct regmap_access_table apds9160_writeable_table = { + .yes_ranges = apds9160_writeable_ranges, + .n_yes_ranges = ARRAY_SIZE(apds9160_writeable_ranges), +}; + +static const struct regmap_range apds9160_volatile_ranges[] = { + regmap_reg_range(APDS9160_REG_SR, APDS9160_REG_LS_DATA_ALS_MSB), +}; + +static const struct regmap_access_table apds9160_volatile_table = { + .yes_ranges = apds9160_volatile_ranges, + .n_yes_ranges = ARRAY_SIZE(apds9160_volatile_ranges), +}; + +static const struct regmap_config apds9160_regmap_config = { + .name = APDS9160_REGMAP_NAME, + .reg_bits = 8, + .val_bits = 8, + .use_single_read = true, + .use_single_write = true, + + .rd_table = &apds9160_readable_table, + .wr_table = &apds9160_writeable_table, + .volatile_table = &apds9160_volatile_table, + + .reg_defaults = apds9160_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(apds9160_reg_defaults), + .max_register = APDS9160_REG_CNT, + .cache_type = REGCACHE_RBTREE, +}; + +static const struct iio_event_spec apds9160_ps_event_spec[] = { + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_RISING, + .mask_separate = BIT(IIO_EV_INFO_VALUE), + }, + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_FALLING, + .mask_separate = BIT(IIO_EV_INFO_VALUE), + }, + { + .type = IIO_EV_TYPE_THRESH, + .mask_separate = BIT(IIO_EV_INFO_ENABLE), + }, +}; + +static const struct iio_event_spec apds9160_als_event_spec[] = { + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_RISING, + .mask_separate = BIT(IIO_EV_INFO_VALUE), + }, + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_FALLING, + .mask_separate = BIT(IIO_EV_INFO_VALUE), + }, + { + .type = IIO_EV_TYPE_THRESH, + .mask_separate = BIT(IIO_EV_INFO_ENABLE), + }, +}; + +static const struct iio_chan_spec apds9160_channels[] = { + { + /* Proximity sensor channel */ + .type = IIO_PROXIMITY, + .address = APDS9160_REG_PS_DATA_LSB, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | + BIT(IIO_CHAN_INFO_CALIBSCALE) | + BIT(IIO_CHAN_INFO_HARDWAREGAIN) | + BIT(IIO_CHAN_INFO_CALIBBIAS), + .channel = 0, + .indexed = 0, + .scan_index = -1, + + .event_spec = apds9160_ps_event_spec, + .num_event_specs = ARRAY_SIZE(apds9160_ps_event_spec), + }, + { + /* Proximity sensor led current */ + .type = IIO_CURRENT, + .output = 1, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + .scan_index = -1, + }, + { + /* Clear channel */ + .type = IIO_INTENSITY, + .address = APDS9160_REG_LS_DATA_CLEAR_LSB, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_INT_TIME) | + BIT(IIO_CHAN_INFO_HARDWAREGAIN) | + BIT(IIO_CHAN_INFO_SCALE), + .channel2 = IIO_MOD_LIGHT_CLEAR, + .modified = 1, + .scan_index = -1, + + .event_spec = apds9160_als_event_spec, + .num_event_specs = ARRAY_SIZE(apds9160_als_event_spec), + }, + { + /* Illuminance */ + .type = IIO_LIGHT, + .address = APDS9160_REG_LS_DATA_ALS_LSB, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), + .scan_index = -1, + } +}; + +/* Attributes */ +// clang-format off +static const int apds9160_als_rate_map[][2] = { + { 25, 0x00 }, + { 50, 0x01 }, + { 100, 0x02 }, + { 200, 0x03 } +}; + +static const int apds9160_als_gain_map[][2] = { + { 1, 0x00 }, + { 3, 0x01 }, + { 6, 0x02 }, + { 18, 0x03 }, + { 64, 0x04 } +}; + +static const int apds9160_ps_gain_map[][2] = { + { 1, 0x00 }, + { 2, 0x01}, + { 4, 0x02}, + { 8, 0x03} +}; + +static const int apds9160_ps_rate_map[][2] = { + { 25, 0x03 }, + { 50, 0x04 }, + { 100, 0x05 }, + { 200, 0x06 }, + { 400, 0x07 } +}; + +static const int adps9160_ps_led_current_map[][2] = { + { 10, 0x00 }, + { 25, 0x01 }, + { 50, 0x02 }, + { 100, 0x03 }, + { 150, 0x04}, + { 175, 0x05 }, + { 200, 0x06 } +}; +// clang-format on + +struct apds9160_scale { + int itime; + int gain; + int scale1; + int scale2; +}; + +static const struct apds9160_scale apds9160_als_scale_map[] = { + { + .gain = 1, + .itime = 25, + .scale1 = 3272, + .scale2 = 1000, + }, + { + .gain = 1, + .itime = 50, + .scale1 = 1639, + .scale2 = 1000, + }, + { + .gain = 1, + .itime = 100, + .scale1 = 819, + .scale2 = 1000, + }, + { + .gain = 3, + .itime = 25, + .scale1 = 1077, + .scale2 = 1000, + }, + { + .gain = 3, + .itime = 50, + .scale1 = 538, + .scale2 = 1000, + }, + { + .gain = 3, + .itime = 100, + .scale1 = 269, + .scale2 = 1000, + }, + { + .gain = 6, + .itime = 25, + .scale1 = 525, + .scale2 = 1000, + }, + { + .gain = 6, + .itime = 50, + .scale1 = 263, + .scale2 = 1000, + }, + { + .gain = 6, + .itime = 100, + .scale1 = 131, + .scale2 = 1000, + }, + { + .gain = 18, + .itime = 25, + .scale1 = 169, + .scale2 = 1000, + }, + { + .gain = 18, + .itime = 50, + .scale1 = 84, + .scale2 = 1000, + }, + { + .gain = 18, + .itime = 100, + .scale1 = 42, + .scale2 = 1000, + }, + { + .gain = 64, + .itime = 25, + .scale1 = 49, + .scale2 = 1000, + }, + { + .gain = 64, + .itime = 50, + .scale1 = 25, + .scale2 = 1000, + }, + { + .gain = 64, + .itime = 100, + .scale1 = 12, + .scale2 = 1000, + }, +}; + +static IIO_CONST_ATTR(in_intensity_integration_time_available, "25 50 100 200"); +static IIO_CONST_ATTR(in_proximity_sampling_frequency_available, + "25 50 100 200 400"); +static IIO_CONST_ATTR(in_intensity_hardwaregain_available, "1 3 6 18 64"); +static IIO_CONST_ATTR(in_proximity_hardwaregain_available, "1 2 4 8"); +static IIO_CONST_ATTR(out_current_available, "10 25 50 100 150 175 200"); + +static struct attribute *apds9160_attributes[] = { + &iio_const_attr_in_intensity_integration_time_available.dev_attr.attr, + &iio_const_attr_in_intensity_hardwaregain_available.dev_attr.attr, + &iio_const_attr_in_proximity_sampling_frequency_available.dev_attr.attr, + &iio_const_attr_in_proximity_hardwaregain_available.dev_attr.attr, + &iio_const_attr_out_current_available.dev_attr.attr, + NULL, +}; + +static const struct attribute_group apds9160_attribute_group = { + .attrs = apds9160_attributes, +}; + +static const struct reg_field apds9160_reg_field_ls_en = + REG_FIELD(APDS9160_REG_CTRL, 1, 1); + +static const struct reg_field apds9160_reg_field_ps_en = + REG_FIELD(APDS9160_REG_CTRL, 0, 0); + +static const struct reg_field apds9160_reg_field_int_ps = + REG_FIELD(APDS9160_REG_INT_CFG, 0, 0); + +static const struct reg_field apds9160_reg_field_int_als = + REG_FIELD(APDS9160_REG_INT_CFG, 2, 2); + +static const struct reg_field apds9160_reg_field_ps_overflow = + REG_FIELD(APDS9160_REG_PS_DATA_MSB, 3, 3); + +static const struct reg_field apds9160_reg_field_als_rate = + REG_FIELD(APDS9160_REG_LS_MEAS_RATE, 0, 2); + +static const struct reg_field apds9160_reg_field_als_gain = + REG_FIELD(APDS9160_REG_LS_GAIN, 0, 2); + +static const struct reg_field apds9160_reg_field_ps_rate = + REG_FIELD(APDS9160_REG_PS_MEAS_RATE, 0, 2); + +static const struct reg_field apds9160_reg_field_als_res = + REG_FIELD(APDS9160_REG_LS_MEAS_RATE, 4, 6); + +static const struct reg_field apds9160_reg_field_ps_current = + REG_FIELD(APDS9160_REG_PS_LED, 0, 2); + +static const struct reg_field apds9160_reg_field_ps_gain = + REG_FIELD(APDS9160_REG_PS_MEAS_RATE, 6, 7); + +static const struct reg_field apds9160_reg_field_ps_resolution = + REG_FIELD(APDS9160_REG_PS_MEAS_RATE, 3, 4); + +struct apds9160_chip { + struct i2c_client *client; + struct iio_dev *indio_dev; + struct regmap *regmap; + struct mutex lock; /* avoid parallel access */ + + struct regmap_field *reg_enable_ps; + struct regmap_field *reg_enable_als; + struct regmap_field *reg_int_ps; + struct regmap_field *reg_int_als; + struct regmap_field *reg_ps_overflow; + struct regmap_field *reg_als_rate; + struct regmap_field *reg_als_resolution; + struct regmap_field *reg_ps_rate; + struct regmap_field *reg_als_gain; + struct regmap_field *reg_ps_current; + struct regmap_field *reg_ps_gain; + struct regmap_field *reg_ps_resolution; + + /* State data */ + u8 revision; + int als_int; + int ps_int; + + /* Configuration values */ + int als_itime; + int als_hwgain; + int als_scale1; + int als_scale2; + int ps_rate; + int ps_cancellation_level; + int ps_cancellation_analog; + int ps_current; + int ps_gain; +}; + +static const struct i2c_device_id apds9160_id[] = { { APDS9160_DRIVER_NAME, 0 }, + {} }; + +/** Called when mutex is locked */ +static void apds9160_set_scale(struct apds9160_chip *data) +{ + for (int idx = 0; idx < ARRAY_SIZE(apds9160_als_scale_map); idx++) { + if (data->als_hwgain == apds9160_als_scale_map[idx].gain && + data->als_itime == apds9160_als_scale_map[idx].itime) { + data->als_scale1 = apds9160_als_scale_map[idx].scale1; + data->als_scale2 = apds9160_als_scale_map[idx].scale2; + } + } +} + +static int apds9160_set_ps_rate(struct apds9160_chip *data, int val) +{ + int ret = -EINVAL; + int idx; + + dev_dbg(&data->client->dev, "%s - set rate to %i\n", __func__, val); + for (idx = 0; idx < ARRAY_SIZE(apds9160_ps_rate_map); idx++) { + if (apds9160_ps_rate_map[idx][0] == val) { + mutex_lock(&data->lock); + ret = regmap_field_write(data->reg_ps_rate, + apds9160_ps_rate_map[idx][1]); + if (!ret) + data->ps_rate = val; + mutex_unlock(&data->lock); + break; + } + } + + return ret; +} + +static int apds9160_set_ps_gain(struct apds9160_chip *data, int val) +{ + int ret = -EINVAL; + int idx; + + dev_dbg(&data->client->dev, "%s - set gain to %i\n", __func__, val); + for (idx = 0; idx < ARRAY_SIZE(apds9160_ps_gain_map); idx++) { + if (apds9160_ps_gain_map[idx][0] == val) { + mutex_lock(&data->lock); + ret = regmap_field_write(data->reg_ps_gain, + apds9160_ps_gain_map[idx][1]); + if (!ret) + data->ps_gain = val; + mutex_unlock(&data->lock); + break; + } + } + + return ret; +} + +/** + * The PS intelligent cancellation level register allows for an on-chip substraction + * of the ADC count caused by unwanted reflected light from PS ADC output. + */ +static int apds9160_set_ps_cancellation_level(struct apds9160_chip *data, + int val) +{ + int ret = -EINVAL; + __le16 buf; + + dev_dbg(&data->client->dev, "%s - set cancellation level to %i\n", + __func__, val); + if (val < 0 || val > 0xFFFF) + return ret; + + mutex_lock(&data->lock); + buf = cpu_to_le16(val); + ret = regmap_bulk_write(data->regmap, APDS9160_REG_PS_CAN_LEVEL_DIG_LSB, + &buf, 2); + if (!ret) + data->ps_cancellation_level = val; + mutex_unlock(&data->lock); + return ret; +} + +/** + * This parameter determines the cancellation pulse duration in each of the PWM pulse. + * The cancellation is applied during the integration phase of the PS measurement. + * Duration is programmed in half clock cycles + */ +static int apds9160_set_ps_analog_cancellation(struct apds9160_chip *data, + int val) +{ + int ret = -EINVAL; + + dev_dbg(&data->client->dev, "%s - set analog cancellation to %i\n", + __func__, val); + if (val < 0 || val > 0x3F) + return ret; + + mutex_lock(&data->lock); + ret = regmap_write(data->regmap, APDS9160_REG_PS_CAN_LEVEL_ANA_DUR, + val); + if (!ret) + data->ps_cancellation_analog = val; + mutex_unlock(&data->lock); + return ret; +} + +/** + * Set the proximity sensor led current + */ +static int apds9160_set_ps_current(struct apds9160_chip *data, int val) +{ + int ret = -EINVAL; + int idx; + + dev_dbg(&data->client->dev, "%s - set current to %i\n", __func__, val); + for (idx = 0; idx < ARRAY_SIZE(adps9160_ps_led_current_map); idx++) { + if (adps9160_ps_led_current_map[idx][0] == val) { + mutex_lock(&data->lock); + ret = regmap_field_write( + data->reg_ps_current, + adps9160_ps_led_current_map[idx][1]); + + if (!ret) + data->ps_current = val; + + mutex_unlock(&data->lock); + break; + } + } + return ret; +} + +static int apds9160_set_als_gain(struct apds9160_chip *data, int val) +{ + int ret = -EINVAL; + int idx; + + dev_dbg(&data->client->dev, "%s - set als gain to %i\n", __func__, val); + for (idx = 0; idx < ARRAY_SIZE(apds9160_als_gain_map); idx++) { + if (apds9160_als_gain_map[idx][0] == val) { + mutex_lock(&data->lock); + ret = regmap_field_write(data->reg_als_gain, + apds9160_als_gain_map[idx][1]); + if (!ret) { + data->als_hwgain = val; + apds9160_set_scale(data); + } + mutex_unlock(&data->lock); + break; + } + } + return ret; +} + +static int apds9160_set_als_int_time(struct apds9160_chip *data, int val) +{ + int ret = -EINVAL; + int idx; + + dev_dbg(&data->client->dev, "%s - set int time to %i\n", __func__, val); + for (idx = 0; idx < ARRAY_SIZE(apds9160_als_rate_map); idx++) { + if (apds9160_als_rate_map[idx][0] == val) { + mutex_lock(&data->lock); + ret = regmap_field_write(data->reg_als_rate, + apds9160_als_rate_map[idx][1]); + if (!ret) { + data->als_itime = val; + /* Lower resolution for faster rates */ + switch (val) { + case 25: + ret = regmap_field_write( + data->reg_als_resolution, + APDS9160_CMD_LS_RESOLUTION_25MS); + break; + case 50: + ret = regmap_field_write( + data->reg_als_resolution, + APDS9160_CMD_LS_RESOLUTION_50MS); + break; + case 200: + ret = regmap_field_write( + data->reg_als_resolution, + APDS9160_CMD_LS_RESOLUTION_200MS); + break; + default: + ret = regmap_field_write( + data->reg_als_resolution, + APDS9160_CMD_LS_RESOLUTION_100MS); + } + apds9160_set_scale(data); + } + mutex_unlock(&data->lock); + break; + } + } + + return ret; +} + +static int apds9160_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, + int *val2, long mask) +{ + struct apds9160_chip *data = iio_priv(indio_dev); + int ret = -EINVAL; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + switch (chan->type) { + case IIO_PROXIMITY: { + __le16 buf; + + ret = regmap_bulk_read(data->regmap, chan->address, + &buf, 2); + if (!ret) { + ret = IIO_VAL_INT; + *val = le16_to_cpu(buf); + // Remove data overflow and ambient light overflow bits from result + *val &= APDS9160_PS_DATA_MASK; + } + } break; + case IIO_LIGHT: + case IIO_INTENSITY: { + __le32 buf = 0; + + ret = regmap_bulk_read(data->regmap, chan->address, + &buf, 3); + if (!ret) { + ret = IIO_VAL_INT; + *val = le32_to_cpu(buf); + } + } break; + case IIO_CURRENT: { + ret = IIO_VAL_INT; + *val = data->ps_current; + } break; + default: + break; + } + break; + case IIO_CHAN_INFO_HARDWAREGAIN: + switch (chan->type) { + case IIO_INTENSITY: + ret = IIO_VAL_INT; + *val = data->als_hwgain; + break; + case IIO_PROXIMITY: + ret = IIO_VAL_INT; + *val = data->ps_gain; + break; + default: + break; + } + break; + case IIO_CHAN_INFO_INT_TIME: + switch (chan->type) { + case IIO_INTENSITY: + ret = IIO_VAL_INT; + *val = data->als_itime; + break; + default: + break; + } + break; + case IIO_CHAN_INFO_SAMP_FREQ: + switch (chan->type) { + case IIO_PROXIMITY: + ret = IIO_VAL_INT; + *val = data->ps_rate; + break; + default: + break; + } + break; + case IIO_CHAN_INFO_CALIBSCALE: + switch (chan->type) { + case IIO_PROXIMITY: + ret = IIO_VAL_INT; + *val = data->ps_cancellation_level; + break; + default: + break; + } + break; + case IIO_CHAN_INFO_CALIBBIAS: + switch (chan->type) { + case IIO_PROXIMITY: + ret = IIO_VAL_INT; + *val = data->ps_cancellation_analog; + break; + default: + break; + } + break; + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_LIGHT: + case IIO_INTENSITY: + ret = IIO_VAL_FRACTIONAL; + *val = data->als_scale1; + *val2 = data->als_scale2; + break; + default: + break; + } + break; + default: + break; + } + + return ret; +}; + +static int apds9160_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, + int val2, long mask) +{ + struct apds9160_chip *data = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_INT_TIME: + if (val2 != 0) + return -EINVAL; + switch (chan->type) { + case IIO_INTENSITY: + return apds9160_set_als_int_time(data, val); + default: + return -EINVAL; + } + case IIO_CHAN_INFO_SAMP_FREQ: + if (val2 != 0) + return -EINVAL; + switch (chan->type) { + case IIO_PROXIMITY: + return apds9160_set_ps_rate(data, val); + default: + return -EINVAL; + } + case IIO_CHAN_INFO_HARDWAREGAIN: + if (val2 != 0) + return -EINVAL; + switch (chan->type) { + case IIO_INTENSITY: + return apds9160_set_als_gain(data, val); + case IIO_PROXIMITY: + return apds9160_set_ps_gain(data, val); + default: + return -EINVAL; + } + case IIO_CHAN_INFO_CALIBSCALE: + if (val2 != 0) + return -EINVAL; + switch (chan->type) { + case IIO_PROXIMITY: + return apds9160_set_ps_cancellation_level(data, val); + default: + return -EINVAL; + } + case IIO_CHAN_INFO_CALIBBIAS: + if (val2 != 0) + return -EINVAL; + switch (chan->type) { + case IIO_PROXIMITY: + return apds9160_set_ps_analog_cancellation(data, val); + default: + return -EINVAL; + } + case IIO_CHAN_INFO_RAW: + if (val2 != 0) + return -EINVAL; + switch (chan->type) { + case IIO_CURRENT: + return apds9160_set_ps_current(data, val); + default: + return -EINVAL; + } + default: + return -EINVAL; + } + + return 0; +} + +static inline int apds9160_get_thres_reg(const struct iio_chan_spec *chan, + enum iio_event_direction dir, u8 *reg) +{ + switch (dir) { + case IIO_EV_DIR_RISING: + switch (chan->type) { + case IIO_PROXIMITY: + *reg = APDS9160_REG_PS_THRES_HI_LSB; + break; + case IIO_INTENSITY: + *reg = APDS9160_REG_LS_THRES_UP_LSB; + break; + default: + return -EINVAL; + } + break; + case IIO_EV_DIR_FALLING: + switch (chan->type) { + case IIO_PROXIMITY: + *reg = APDS9160_REG_PS_THRES_LO_LSB; + break; + case IIO_INTENSITY: + *reg = APDS9160_REG_LS_THRES_LO_LSB; + break; + default: + return -EINVAL; + } + break; + default: + return -EINVAL; + } + + return 0; +} + +static int apds9160_read_event(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, int *val, int *val2) +{ + u8 reg; + + int ret = 0; + struct apds9160_chip *data = iio_priv(indio_dev); + + if (info != IIO_EV_INFO_VALUE) + return -EINVAL; + + ret = apds9160_get_thres_reg(chan, dir, ®); + if (ret < 0) + return ret; + + if (chan->type == IIO_PROXIMITY) { + __le16 buf; + + ret = regmap_bulk_read(data->regmap, reg, &buf, 2); + if (ret < 0) + return ret; + *val = le16_to_cpu(buf); + } else if (chan->type == IIO_INTENSITY) { + __le32 buf = 0; + + ret = regmap_bulk_read(data->regmap, reg, &buf, 3); + if (ret < 0) + return ret; + *val = le32_to_cpu(buf); + } else + return -EINVAL; + + *val2 = 0; + + return IIO_VAL_INT; +} + +static int apds9160_write_event(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, int val, int val2) +{ + u8 reg; + int ret = 0; + struct apds9160_chip *data = iio_priv(indio_dev); + + if (info != IIO_EV_INFO_VALUE) + return -EINVAL; + + ret = apds9160_get_thres_reg(chan, dir, ®); + if (ret < 0) + return ret; + + if (chan->type == IIO_PROXIMITY) { + if (val < 0 || val > APDS9160_PS_THRES_MAX) + return -EINVAL; + __le16 buf; + + buf = cpu_to_le16(val); + ret = regmap_bulk_write(data->regmap, reg, &buf, 2); + if (ret < 0) + return ret; + } else if (chan->type == IIO_INTENSITY) { + if (val < 0 || val > APDS9160_LS_THRES_MAX) + return -EINVAL; + __le32 buf = 0; + + buf = cpu_to_le32(val); + ret = regmap_bulk_write(data->regmap, reg, &buf, 3); + if (ret < 0) + return ret; + } else + return -EINVAL; + + return 0; +} + +static int apds9160_read_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir) +{ + struct apds9160_chip *data = iio_priv(indio_dev); + + switch (chan->type) { + case IIO_PROXIMITY: + return data->ps_int; + case IIO_INTENSITY: + return data->als_int; + default: + return -EINVAL; + } + + return 0; +} + +static int apds9160_write_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, int state) +{ + struct apds9160_chip *data = iio_priv(indio_dev); + int ret; + + state = !!state; + + switch (chan->type) { + case IIO_PROXIMITY: + if (data->ps_int == state) + return -EINVAL; + + ret = regmap_field_write(data->reg_int_ps, state); + if (ret) + return ret; + data->ps_int = state; + break; + case IIO_INTENSITY: + if (data->als_int == state) + return -EINVAL; + + ret = regmap_field_write(data->reg_int_als, state); + if (ret) + return ret; + data->als_int = state; + break; + default: + return -EINVAL; + } + + return 0; +} + +static irqreturn_t apds9160_irq_handler(int irq, void *private) +{ + struct iio_dev *indio_dev = private; + struct apds9160_chip *data = iio_priv(indio_dev); + int ret, status; + + /* Reading status register clears the interrupt flag */ + ret = regmap_read(data->regmap, APDS9160_REG_SR, &status); + if (ret < 0) { + dev_err(&data->client->dev, "irq status reg read failed\n"); + return IRQ_HANDLED; + } + + if ((status & APDS9160_REG_SR_LS_INT) && + (status & APDS9160_REG_SR_LS_NEW_DATA) && data->als_int) { + iio_push_event(indio_dev, + IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_EITHER), + iio_get_time_ns(indio_dev)); + } + + if ((status & APDS9160_REG_SR_PS_INT) && + (status & APDS9160_REG_SR_PS_NEW_DATA) && data->ps_int) { + /** Interrupt flag is cleared after data read */ + iio_push_event(indio_dev, + IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_EITHER), + iio_get_time_ns(indio_dev)); + } + + return IRQ_HANDLED; +} + +static int apds9160_detect(struct apds9160_chip *chip) +{ + struct i2c_client *client = chip->client; + int ret; + u32 val; + u8 id; + u8 rev; + + ret = regmap_read(chip->regmap, APDS9160_REG_ID, &val); + if (ret < 0) { + dev_err(&client->dev, "ID read failed\n"); + return ret; + } + + id = APDS9160_PART_ID_MASK & ((u8)val); + rev = APDS9160_PART_REV_MASK & ((u8)val); + + switch (id) { + case APDS9160_PART_ID_0: + chip->revision = rev; + dev_info(&client->dev, "Device probed, rev %u\n", + chip->revision); + break; + default: + dev_info(&client->dev, "Unsupported part id %u rev %u\n", id, + rev); + ret = -ENODEV; + break; + } + return ret; +} + +static int apds9160_chip_init(struct apds9160_chip *chip) +{ + int ret; + + /* Write default values to interrupt register */ + ret = regmap_field_write(chip->reg_int_ps, 0); + chip->ps_int = 0; + if (ret) + return ret; + + ret = regmap_field_write(chip->reg_int_als, 0); + chip->als_int = 0; + if (ret) + return ret; + + /* Write default values to control register */ + ret = regmap_field_write(chip->reg_enable_als, 1); + if (ret) + return ret; + + ret = regmap_field_write(chip->reg_enable_ps, 1); + if (ret) + return ret; + + /* Write other default values */ + ret = regmap_field_write(chip->reg_ps_resolution, + APDS9160_DEFAULT_PS_RESOLUTION); + if (ret) + return ret; + + /* Write default values to configuration registers */ + ret = apds9160_set_ps_current(chip, APDS9160_DEFAULT_PS_CURRENT); + if (ret) + return ret; + + apds9160_set_ps_rate(chip, APDS9160_DEFAULT_PS_RATE); + if (ret) + return ret; + + apds9160_set_als_int_time(chip, APDS9160_DEFAULT_LS_RATE); + if (ret) + return ret; + + ret = apds9160_set_als_gain(chip, APDS9160_DEFAULT_LS_GAIN); + if (ret) + return ret; + + ret = apds9160_set_ps_gain(chip, APDS9160_DEFAULT_PS_GAIN); + if (ret) + return ret; + + ret = apds9160_set_ps_analog_cancellation( + chip, APDS9160_DEFAULT_PS_ANALOG_CANCELLATION); + if (ret) + return ret; + + return apds9160_set_ps_cancellation_level( + chip, APDS9160_DEFAULT_PS_CANCELLATION_LEVEL); +} + +static int apds9160_configure(struct iio_dev *indio_dev) +{ + struct apds9160_chip *chip = iio_priv(indio_dev); + + return apds9160_chip_init(chip); +} + +static int apds9160_regfield_init(struct apds9160_chip *data) +{ + struct device *dev = &data->client->dev; + struct regmap *regmap = data->regmap; + + data->reg_int_als = devm_regmap_field_alloc(dev, regmap, + apds9160_reg_field_int_als); + if (IS_ERR(data->reg_int_als)) { + dev_err(dev, "INT ALS reg field init failed\n"); + return PTR_ERR(data->reg_int_als); + } + + data->reg_int_ps = + devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_int_ps); + if (IS_ERR(data->reg_int_ps)) { + dev_err(dev, "INT ps reg field init failed\n"); + return PTR_ERR(data->reg_int_ps); + } + + data->reg_enable_als = + devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_ls_en); + if (IS_ERR(data->reg_enable_als)) { + dev_err(dev, "Enable ALS reg field init failed\n"); + return PTR_ERR(data->reg_enable_als); + } + + data->reg_enable_ps = + devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_ps_en); + if (IS_ERR(data->reg_enable_ps)) { + dev_err(dev, "Enable PS reg field init failed\n"); + return PTR_ERR(data->reg_enable_ps); + } + + data->reg_ps_overflow = devm_regmap_field_alloc( + dev, regmap, apds9160_reg_field_ps_overflow); + if (IS_ERR(data->reg_ps_overflow)) { + dev_err(dev, "PS overflow reg field init failed\n"); + return PTR_ERR(data->reg_ps_overflow); + } + + data->reg_als_rate = devm_regmap_field_alloc( + dev, regmap, apds9160_reg_field_als_rate); + if (IS_ERR(data->reg_als_rate)) { + dev_err(dev, "ALS measurement rate field init failed\n"); + return PTR_ERR(data->reg_als_rate); + } + + data->reg_als_resolution = devm_regmap_field_alloc( + dev, regmap, apds9160_reg_field_als_res); + if (IS_ERR(data->reg_als_resolution)) { + dev_err(dev, "ALS resolution field init failed\n"); + return PTR_ERR(data->reg_als_resolution); + } + + data->reg_ps_rate = devm_regmap_field_alloc(dev, regmap, + apds9160_reg_field_ps_rate); + if (IS_ERR(data->reg_ps_rate)) { + dev_err(dev, "PS measurement rate field init failed\n"); + return PTR_ERR(data->reg_ps_rate); + } + + data->reg_als_gain = devm_regmap_field_alloc( + dev, regmap, apds9160_reg_field_als_gain); + if (IS_ERR(data->reg_als_gain)) { + dev_err(dev, "ALS gain field init failed\n"); + return PTR_ERR(data->reg_als_gain); + } + + data->reg_ps_current = devm_regmap_field_alloc( + dev, regmap, apds9160_reg_field_ps_current); + if (IS_ERR(data->reg_ps_current)) { + dev_err(dev, "PS current field init failed\n"); + return PTR_ERR(data->reg_ps_current); + } + + data->reg_ps_gain = devm_regmap_field_alloc(dev, regmap, + apds9160_reg_field_ps_gain); + if (IS_ERR(data->reg_ps_gain)) { + dev_err(dev, "PS gain field init failed\n"); + return PTR_ERR(data->reg_ps_gain); + } + + data->reg_ps_resolution = devm_regmap_field_alloc( + dev, regmap, apds9160_reg_field_ps_resolution); + if (IS_ERR(data->reg_ps_resolution)) { + dev_err(dev, "PS resolution field init failed\n"); + return PTR_ERR(data->reg_ps_resolution); + } + + return 0; +} + +static int apds9160_disable(struct apds9160_chip *data) +{ + int ret; + + ret = regmap_field_write(data->reg_enable_als, 0); + if (ret) + return ret; + + return regmap_field_write(data->reg_enable_ps, 0); +} + +static int apds9160_shutdown(struct iio_dev *indio_dev) +{ + struct apds9160_chip *data = iio_priv(indio_dev); + + return apds9160_disable(data); +} + +static void apds9160_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + + struct apds9160_chip *data = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + apds9160_disable(data); +} + +static const struct iio_buffer_setup_ops apds9160_buffer_setup_ops = { + .postenable = apds9160_configure, + .predisable = apds9160_shutdown, +}; + +static const struct iio_info apds9160_info = { + .attrs = &apds9160_attribute_group, + .read_raw = apds9160_read_raw, + .write_raw = apds9160_write_raw, + .read_event_value = apds9160_read_event, + .write_event_value = apds9160_write_event, + .read_event_config = apds9160_read_event_config, + .write_event_config = apds9160_write_event_config, +}; + +static int apds9160_probe(struct i2c_client *client) +{ + struct apds9160_chip *chip; + struct iio_dev *indio_dev; + int err; + + dev_info(&client->dev, + "Loading proximity/ambient light sensor driver\n"); + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip)); + indio_dev->info = &apds9160_info; + indio_dev->name = APDS9160_DRIVER_NAME; + indio_dev->channels = apds9160_channels; + indio_dev->num_channels = ARRAY_SIZE(apds9160_channels); + indio_dev->modes = INDIO_DIRECT_MODE; + + err = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev, + &apds9160_buffer_setup_ops); + if (err) + return err; + + chip = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + chip->client = client; + chip->regmap = devm_regmap_init_i2c(client, &apds9160_regmap_config); + if (IS_ERR(chip->regmap)) { + dev_err(&client->dev, "regmap initialization failed.\n"); + return PTR_ERR(chip->regmap); + } + + chip->client = client; + chip->indio_dev = indio_dev; + mutex_init(&chip->lock); + + err = apds9160_detect(chip); + if (err < 0) { + dev_err(&client->dev, "apds9160 not found\n"); + return err; + } + + err = apds9160_regfield_init(chip); + if (err) + return err; + + err = apds9160_chip_init(chip); + if (err) + return err; + + if (client->irq > 0) { + err = devm_request_threaded_irq( + &client->dev, client->irq, NULL, apds9160_irq_handler, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, "apds9160_event", + indio_dev); + if (err) { + dev_err(&client->dev, "request irq (%d) failed\n", + client->irq); + goto fail; + } + } else { + dev_info(&client->dev, + "init: no IRQ defined, ps/als interrupts disabled\n"); + } + + err = iio_device_register(indio_dev); + if (err) + goto fail; + + return 0; +fail: + apds9160_disable(chip); + return err; +} + +static const struct of_device_id apds9160_of_match[] = { + { .compatible = "avago,apds9160" }, + { .compatible = "broadmobi,apds9160" }, + {} +}; +MODULE_DEVICE_TABLE(of, apds9160_of_match); + +static struct i2c_driver apds9160_driver = { + .driver = { + .name = APDS9160_DRIVER_NAME, + .owner = THIS_MODULE, + .of_match_table = apds9160_of_match, + }, + .probe = apds9160_probe, + .remove = apds9160_remove, + .id_table = apds9160_id, +}; + +MODULE_DEVICE_TABLE(i2c, apds9160_id); +module_i2c_driver(apds9160_driver); +MODULE_DESCRIPTION("APDS9160 combined ALS and proximity sensor"); +MODULE_AUTHOR("Mikael Gonella-Bolduc "); +MODULE_LICENSE("GPL"); +MODULE_VERSION("1.0");