998 строки
23 KiB
C
998 строки
23 KiB
C
/*
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* Copyright (c) 2015 Intel Corporation
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*
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* Driver for UPISEMI us5182d Proximity and Ambient Light Sensor.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* To do: Interrupt support.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/acpi.h>
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/iio/events.h>
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#include <linux/iio/iio.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/iio/sysfs.h>
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#include <linux/mutex.h>
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#include <linux/pm.h>
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#include <linux/pm_runtime.h>
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#define US5182D_REG_CFG0 0x00
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#define US5182D_CFG0_ONESHOT_EN BIT(6)
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#define US5182D_CFG0_SHUTDOWN_EN BIT(7)
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#define US5182D_CFG0_WORD_ENABLE BIT(0)
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#define US5182D_CFG0_PROX BIT(3)
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#define US5182D_CFG0_PX_IRQ BIT(2)
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#define US5182D_REG_CFG1 0x01
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#define US5182D_CFG1_ALS_RES16 BIT(4)
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#define US5182D_CFG1_AGAIN_DEFAULT 0x00
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#define US5182D_REG_CFG2 0x02
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#define US5182D_CFG2_PX_RES16 BIT(4)
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#define US5182D_CFG2_PXGAIN_DEFAULT BIT(2)
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#define US5182D_REG_CFG3 0x03
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#define US5182D_CFG3_LED_CURRENT100 (BIT(4) | BIT(5))
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#define US5182D_CFG3_INT_SOURCE_PX BIT(3)
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#define US5182D_REG_CFG4 0x10
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/*
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* Registers for tuning the auto dark current cancelling feature.
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* DARK_TH(reg 0x27,0x28) - threshold (counts) for auto dark cancelling.
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* when ALS > DARK_TH --> ALS_Code = ALS - Upper(0x2A) * Dark
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* when ALS < DARK_TH --> ALS_Code = ALS - Lower(0x29) * Dark
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*/
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#define US5182D_REG_UDARK_TH 0x27
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#define US5182D_REG_DARK_AUTO_EN 0x2b
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#define US5182D_REG_AUTO_LDARK_GAIN 0x29
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#define US5182D_REG_AUTO_HDARK_GAIN 0x2a
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/* Thresholds for events: px low (0x08-l, 0x09-h), px high (0x0a-l 0x0b-h) */
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#define US5182D_REG_PXL_TH 0x08
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#define US5182D_REG_PXH_TH 0x0a
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#define US5182D_REG_PXL_TH_DEFAULT 1000
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#define US5182D_REG_PXH_TH_DEFAULT 30000
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#define US5182D_OPMODE_ALS 0x01
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#define US5182D_OPMODE_PX 0x02
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#define US5182D_OPMODE_SHIFT 4
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#define US5182D_REG_DARK_AUTO_EN_DEFAULT 0x80
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#define US5182D_REG_AUTO_LDARK_GAIN_DEFAULT 0x16
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#define US5182D_REG_AUTO_HDARK_GAIN_DEFAULT 0x00
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#define US5182D_REG_ADL 0x0c
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#define US5182D_REG_PDL 0x0e
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#define US5182D_REG_MODE_STORE 0x21
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#define US5182D_STORE_MODE 0x01
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#define US5182D_REG_CHIPID 0xb2
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#define US5182D_OPMODE_MASK GENMASK(5, 4)
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#define US5182D_AGAIN_MASK 0x07
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#define US5182D_RESET_CHIP 0x01
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#define US5182D_CHIPID 0x26
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#define US5182D_DRV_NAME "us5182d"
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#define US5182D_GA_RESOLUTION 1000
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#define US5182D_READ_BYTE 1
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#define US5182D_READ_WORD 2
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#define US5182D_OPSTORE_SLEEP_TIME 20 /* ms */
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#define US5182D_SLEEP_MS 3000 /* ms */
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#define US5182D_PXH_TH_DISABLE 0xffff
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#define US5182D_PXL_TH_DISABLE 0x0000
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/* Available ranges: [12354, 7065, 3998, 2202, 1285, 498, 256, 138] lux */
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static const int us5182d_scales[] = {188500, 107800, 61000, 33600, 19600, 7600,
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3900, 2100};
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/*
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* Experimental thresholds that work with US5182D sensor on evaluation board
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* roughly between 12-32 lux
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*/
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static u16 us5182d_dark_ths_vals[] = {170, 200, 512, 512, 800, 2000, 4000,
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8000};
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enum mode {
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US5182D_ALS_PX,
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US5182D_ALS_ONLY,
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US5182D_PX_ONLY
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};
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enum pmode {
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US5182D_CONTINUOUS,
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US5182D_ONESHOT
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};
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struct us5182d_data {
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struct i2c_client *client;
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struct mutex lock;
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/* Glass attenuation factor */
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u32 ga;
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/* Dark gain tuning */
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u8 lower_dark_gain;
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u8 upper_dark_gain;
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u16 *us5182d_dark_ths;
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u16 px_low_th;
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u16 px_high_th;
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int rising_en;
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int falling_en;
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u8 opmode;
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u8 power_mode;
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bool als_enabled;
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bool px_enabled;
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bool default_continuous;
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};
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static IIO_CONST_ATTR(in_illuminance_scale_available,
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"0.0021 0.0039 0.0076 0.0196 0.0336 0.061 0.1078 0.1885");
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static struct attribute *us5182d_attrs[] = {
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&iio_const_attr_in_illuminance_scale_available.dev_attr.attr,
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NULL
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};
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static const struct attribute_group us5182d_attr_group = {
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.attrs = us5182d_attrs,
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};
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static const struct {
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u8 reg;
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u8 val;
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} us5182d_regvals[] = {
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{US5182D_REG_CFG0, US5182D_CFG0_WORD_ENABLE},
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{US5182D_REG_CFG1, US5182D_CFG1_ALS_RES16},
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{US5182D_REG_CFG2, (US5182D_CFG2_PX_RES16 |
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US5182D_CFG2_PXGAIN_DEFAULT)},
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{US5182D_REG_CFG3, US5182D_CFG3_LED_CURRENT100 |
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US5182D_CFG3_INT_SOURCE_PX},
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{US5182D_REG_CFG4, 0x00},
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};
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static const struct iio_event_spec us5182d_events[] = {
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{
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.type = IIO_EV_TYPE_THRESH,
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.dir = IIO_EV_DIR_RISING,
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.mask_separate = BIT(IIO_EV_INFO_VALUE) |
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BIT(IIO_EV_INFO_ENABLE),
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},
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{
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.type = IIO_EV_TYPE_THRESH,
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.dir = IIO_EV_DIR_FALLING,
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.mask_separate = BIT(IIO_EV_INFO_VALUE) |
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BIT(IIO_EV_INFO_ENABLE),
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},
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};
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static const struct iio_chan_spec us5182d_channels[] = {
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{
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.type = IIO_LIGHT,
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
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BIT(IIO_CHAN_INFO_SCALE),
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},
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{
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.type = IIO_PROXIMITY,
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
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.event_spec = us5182d_events,
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.num_event_specs = ARRAY_SIZE(us5182d_events),
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}
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};
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static int us5182d_oneshot_en(struct us5182d_data *data)
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{
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int ret;
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ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
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if (ret < 0)
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return ret;
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/*
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* In oneshot mode the chip will power itself down after taking the
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* required measurement.
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*/
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ret = ret | US5182D_CFG0_ONESHOT_EN;
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return i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0, ret);
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}
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static int us5182d_set_opmode(struct us5182d_data *data, u8 mode)
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{
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int ret;
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if (mode == data->opmode)
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return 0;
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ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
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if (ret < 0)
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return ret;
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/* update mode */
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ret = ret & ~US5182D_OPMODE_MASK;
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ret = ret | (mode << US5182D_OPMODE_SHIFT);
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/*
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* After updating the operating mode, the chip requires that
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* the operation is stored, by writing 1 in the STORE_MODE
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* register (auto-clearing).
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*/
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ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0, ret);
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if (ret < 0)
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return ret;
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ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_MODE_STORE,
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US5182D_STORE_MODE);
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if (ret < 0)
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return ret;
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data->opmode = mode;
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msleep(US5182D_OPSTORE_SLEEP_TIME);
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return 0;
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}
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static int us5182d_als_enable(struct us5182d_data *data)
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{
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int ret;
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u8 mode;
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if (data->power_mode == US5182D_ONESHOT) {
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ret = us5182d_set_opmode(data, US5182D_ALS_ONLY);
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if (ret < 0)
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return ret;
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data->px_enabled = false;
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}
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if (data->als_enabled)
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return 0;
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mode = data->px_enabled ? US5182D_ALS_PX : US5182D_ALS_ONLY;
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ret = us5182d_set_opmode(data, mode);
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if (ret < 0)
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return ret;
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data->als_enabled = true;
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return 0;
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}
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static int us5182d_px_enable(struct us5182d_data *data)
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{
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int ret;
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u8 mode;
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if (data->power_mode == US5182D_ONESHOT) {
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ret = us5182d_set_opmode(data, US5182D_PX_ONLY);
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if (ret < 0)
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return ret;
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data->als_enabled = false;
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}
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if (data->px_enabled)
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return 0;
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mode = data->als_enabled ? US5182D_ALS_PX : US5182D_PX_ONLY;
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ret = us5182d_set_opmode(data, mode);
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if (ret < 0)
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return ret;
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data->px_enabled = true;
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return 0;
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}
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static int us5182d_get_als(struct us5182d_data *data)
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{
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int ret;
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unsigned long result;
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ret = us5182d_als_enable(data);
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if (ret < 0)
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return ret;
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ret = i2c_smbus_read_word_data(data->client,
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US5182D_REG_ADL);
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if (ret < 0)
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return ret;
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result = ret * data->ga / US5182D_GA_RESOLUTION;
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if (result > 0xffff)
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result = 0xffff;
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return result;
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}
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static int us5182d_get_px(struct us5182d_data *data)
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{
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int ret;
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ret = us5182d_px_enable(data);
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if (ret < 0)
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return ret;
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return i2c_smbus_read_word_data(data->client,
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US5182D_REG_PDL);
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}
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static int us5182d_shutdown_en(struct us5182d_data *data, u8 state)
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{
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int ret;
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if (data->power_mode == US5182D_ONESHOT)
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return 0;
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ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
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if (ret < 0)
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return ret;
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ret = ret & ~US5182D_CFG0_SHUTDOWN_EN;
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ret = ret | state;
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ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0, ret);
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if (ret < 0)
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return ret;
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if (state & US5182D_CFG0_SHUTDOWN_EN) {
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data->als_enabled = false;
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data->px_enabled = false;
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}
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return ret;
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}
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static int us5182d_set_power_state(struct us5182d_data *data, bool on)
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{
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int ret;
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if (data->power_mode == US5182D_ONESHOT)
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return 0;
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if (on) {
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ret = pm_runtime_get_sync(&data->client->dev);
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if (ret < 0)
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pm_runtime_put_noidle(&data->client->dev);
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} else {
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pm_runtime_mark_last_busy(&data->client->dev);
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ret = pm_runtime_put_autosuspend(&data->client->dev);
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}
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return ret;
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}
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static int us5182d_read_value(struct us5182d_data *data,
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struct iio_chan_spec const *chan)
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{
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int ret, value;
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mutex_lock(&data->lock);
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if (data->power_mode == US5182D_ONESHOT) {
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ret = us5182d_oneshot_en(data);
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if (ret < 0)
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goto out_err;
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}
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ret = us5182d_set_power_state(data, true);
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if (ret < 0)
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goto out_err;
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if (chan->type == IIO_LIGHT)
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ret = us5182d_get_als(data);
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else
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ret = us5182d_get_px(data);
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if (ret < 0)
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goto out_poweroff;
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value = ret;
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ret = us5182d_set_power_state(data, false);
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if (ret < 0)
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goto out_err;
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mutex_unlock(&data->lock);
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return value;
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out_poweroff:
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us5182d_set_power_state(data, false);
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out_err:
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mutex_unlock(&data->lock);
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return ret;
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}
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static int us5182d_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan, int *val,
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int *val2, long mask)
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{
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struct us5182d_data *data = iio_priv(indio_dev);
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int ret;
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switch (mask) {
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case IIO_CHAN_INFO_RAW:
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ret = us5182d_read_value(data, chan);
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if (ret < 0)
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return ret;
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*val = ret;
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return IIO_VAL_INT;
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case IIO_CHAN_INFO_SCALE:
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ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG1);
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if (ret < 0)
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return ret;
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*val = 0;
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*val2 = us5182d_scales[ret & US5182D_AGAIN_MASK];
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return IIO_VAL_INT_PLUS_MICRO;
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default:
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return -EINVAL;
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}
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}
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/**
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* us5182d_update_dark_th - update Darh_Th registers
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* @data us5182d_data structure
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* @index index in us5182d_dark_ths array to use for the updated value
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*
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* Function needs to be called with a lock held because it needs two i2c write
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* byte operations as these registers (0x27 0x28) don't work in word mode
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* accessing.
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*/
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static int us5182d_update_dark_th(struct us5182d_data *data, int index)
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{
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__be16 dark_th = cpu_to_be16(data->us5182d_dark_ths[index]);
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int ret;
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ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_UDARK_TH,
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((u8 *)&dark_th)[0]);
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if (ret < 0)
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return ret;
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return i2c_smbus_write_byte_data(data->client, US5182D_REG_UDARK_TH + 1,
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((u8 *)&dark_th)[1]);
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}
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/**
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* us5182d_apply_scale - update the ALS scale
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* @data us5182d_data structure
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* @index index in us5182d_scales array to use for the updated value
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*
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* Function needs to be called with a lock held as we're having more than one
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* i2c operation.
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*/
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static int us5182d_apply_scale(struct us5182d_data *data, int index)
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{
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int ret;
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ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG1);
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if (ret < 0)
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return ret;
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ret = ret & (~US5182D_AGAIN_MASK);
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ret |= index;
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ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG1, ret);
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if (ret < 0)
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return ret;
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return us5182d_update_dark_th(data, index);
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}
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static int us5182d_write_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan, int val,
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int val2, long mask)
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{
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struct us5182d_data *data = iio_priv(indio_dev);
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int ret, i;
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|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_SCALE:
|
|
if (val != 0)
|
|
return -EINVAL;
|
|
for (i = 0; i < ARRAY_SIZE(us5182d_scales); i++)
|
|
if (val2 == us5182d_scales[i]) {
|
|
mutex_lock(&data->lock);
|
|
ret = us5182d_apply_scale(data, i);
|
|
mutex_unlock(&data->lock);
|
|
return ret;
|
|
}
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int us5182d_setup_prox(struct iio_dev *indio_dev,
|
|
enum iio_event_direction dir, u16 val)
|
|
{
|
|
struct us5182d_data *data = iio_priv(indio_dev);
|
|
|
|
if (dir == IIO_EV_DIR_FALLING)
|
|
return i2c_smbus_write_word_data(data->client,
|
|
US5182D_REG_PXL_TH, val);
|
|
else if (dir == IIO_EV_DIR_RISING)
|
|
return i2c_smbus_write_word_data(data->client,
|
|
US5182D_REG_PXH_TH, val);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int us5182d_read_thresh(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)
|
|
{
|
|
struct us5182d_data *data = iio_priv(indio_dev);
|
|
|
|
switch (dir) {
|
|
case IIO_EV_DIR_RISING:
|
|
mutex_lock(&data->lock);
|
|
*val = data->px_high_th;
|
|
mutex_unlock(&data->lock);
|
|
break;
|
|
case IIO_EV_DIR_FALLING:
|
|
mutex_lock(&data->lock);
|
|
*val = data->px_low_th;
|
|
mutex_unlock(&data->lock);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return IIO_VAL_INT;
|
|
}
|
|
|
|
static int us5182d_write_thresh(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)
|
|
{
|
|
struct us5182d_data *data = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
if (val < 0 || val > USHRT_MAX || val2 != 0)
|
|
return -EINVAL;
|
|
|
|
switch (dir) {
|
|
case IIO_EV_DIR_RISING:
|
|
mutex_lock(&data->lock);
|
|
if (data->rising_en) {
|
|
ret = us5182d_setup_prox(indio_dev, dir, val);
|
|
if (ret < 0)
|
|
goto err;
|
|
}
|
|
data->px_high_th = val;
|
|
mutex_unlock(&data->lock);
|
|
break;
|
|
case IIO_EV_DIR_FALLING:
|
|
mutex_lock(&data->lock);
|
|
if (data->falling_en) {
|
|
ret = us5182d_setup_prox(indio_dev, dir, val);
|
|
if (ret < 0)
|
|
goto err;
|
|
}
|
|
data->px_low_th = val;
|
|
mutex_unlock(&data->lock);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
err:
|
|
mutex_unlock(&data->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int us5182d_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 us5182d_data *data = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
switch (dir) {
|
|
case IIO_EV_DIR_RISING:
|
|
mutex_lock(&data->lock);
|
|
ret = data->rising_en;
|
|
mutex_unlock(&data->lock);
|
|
break;
|
|
case IIO_EV_DIR_FALLING:
|
|
mutex_lock(&data->lock);
|
|
ret = data->falling_en;
|
|
mutex_unlock(&data->lock);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int us5182d_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 us5182d_data *data = iio_priv(indio_dev);
|
|
int ret;
|
|
u16 new_th;
|
|
|
|
mutex_lock(&data->lock);
|
|
|
|
switch (dir) {
|
|
case IIO_EV_DIR_RISING:
|
|
if (data->rising_en == state) {
|
|
mutex_unlock(&data->lock);
|
|
return 0;
|
|
}
|
|
new_th = US5182D_PXH_TH_DISABLE;
|
|
if (state) {
|
|
data->power_mode = US5182D_CONTINUOUS;
|
|
ret = us5182d_set_power_state(data, true);
|
|
if (ret < 0)
|
|
goto err;
|
|
ret = us5182d_px_enable(data);
|
|
if (ret < 0)
|
|
goto err_poweroff;
|
|
new_th = data->px_high_th;
|
|
}
|
|
ret = us5182d_setup_prox(indio_dev, dir, new_th);
|
|
if (ret < 0)
|
|
goto err_poweroff;
|
|
data->rising_en = state;
|
|
break;
|
|
case IIO_EV_DIR_FALLING:
|
|
if (data->falling_en == state) {
|
|
mutex_unlock(&data->lock);
|
|
return 0;
|
|
}
|
|
new_th = US5182D_PXL_TH_DISABLE;
|
|
if (state) {
|
|
data->power_mode = US5182D_CONTINUOUS;
|
|
ret = us5182d_set_power_state(data, true);
|
|
if (ret < 0)
|
|
goto err;
|
|
ret = us5182d_px_enable(data);
|
|
if (ret < 0)
|
|
goto err_poweroff;
|
|
new_th = data->px_low_th;
|
|
}
|
|
ret = us5182d_setup_prox(indio_dev, dir, new_th);
|
|
if (ret < 0)
|
|
goto err_poweroff;
|
|
data->falling_en = state;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
if (!state) {
|
|
ret = us5182d_set_power_state(data, false);
|
|
if (ret < 0)
|
|
goto err;
|
|
}
|
|
|
|
if (!data->falling_en && !data->rising_en && !data->default_continuous)
|
|
data->power_mode = US5182D_ONESHOT;
|
|
|
|
mutex_unlock(&data->lock);
|
|
return 0;
|
|
|
|
err_poweroff:
|
|
if (state)
|
|
us5182d_set_power_state(data, false);
|
|
err:
|
|
mutex_unlock(&data->lock);
|
|
return ret;
|
|
}
|
|
|
|
static const struct iio_info us5182d_info = {
|
|
.driver_module = THIS_MODULE,
|
|
.read_raw = us5182d_read_raw,
|
|
.write_raw = us5182d_write_raw,
|
|
.attrs = &us5182d_attr_group,
|
|
.read_event_value = &us5182d_read_thresh,
|
|
.write_event_value = &us5182d_write_thresh,
|
|
.read_event_config = &us5182d_read_event_config,
|
|
.write_event_config = &us5182d_write_event_config,
|
|
};
|
|
|
|
static int us5182d_reset(struct iio_dev *indio_dev)
|
|
{
|
|
struct us5182d_data *data = iio_priv(indio_dev);
|
|
|
|
return i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG3,
|
|
US5182D_RESET_CHIP);
|
|
}
|
|
|
|
static int us5182d_init(struct iio_dev *indio_dev)
|
|
{
|
|
struct us5182d_data *data = iio_priv(indio_dev);
|
|
int i, ret;
|
|
|
|
ret = us5182d_reset(indio_dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
data->opmode = 0;
|
|
data->power_mode = US5182D_CONTINUOUS;
|
|
data->px_low_th = US5182D_REG_PXL_TH_DEFAULT;
|
|
data->px_high_th = US5182D_REG_PXH_TH_DEFAULT;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(us5182d_regvals); i++) {
|
|
ret = i2c_smbus_write_byte_data(data->client,
|
|
us5182d_regvals[i].reg,
|
|
us5182d_regvals[i].val);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
data->als_enabled = true;
|
|
data->px_enabled = true;
|
|
|
|
if (!data->default_continuous) {
|
|
ret = us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
|
|
if (ret < 0)
|
|
return ret;
|
|
data->power_mode = US5182D_ONESHOT;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void us5182d_get_platform_data(struct iio_dev *indio_dev)
|
|
{
|
|
struct us5182d_data *data = iio_priv(indio_dev);
|
|
|
|
if (device_property_read_u32(&data->client->dev, "upisemi,glass-coef",
|
|
&data->ga))
|
|
data->ga = US5182D_GA_RESOLUTION;
|
|
if (device_property_read_u16_array(&data->client->dev,
|
|
"upisemi,dark-ths",
|
|
data->us5182d_dark_ths,
|
|
ARRAY_SIZE(us5182d_dark_ths_vals)))
|
|
data->us5182d_dark_ths = us5182d_dark_ths_vals;
|
|
if (device_property_read_u8(&data->client->dev,
|
|
"upisemi,upper-dark-gain",
|
|
&data->upper_dark_gain))
|
|
data->upper_dark_gain = US5182D_REG_AUTO_HDARK_GAIN_DEFAULT;
|
|
if (device_property_read_u8(&data->client->dev,
|
|
"upisemi,lower-dark-gain",
|
|
&data->lower_dark_gain))
|
|
data->lower_dark_gain = US5182D_REG_AUTO_LDARK_GAIN_DEFAULT;
|
|
data->default_continuous = device_property_read_bool(&data->client->dev,
|
|
"upisemi,continuous");
|
|
}
|
|
|
|
static int us5182d_dark_gain_config(struct iio_dev *indio_dev)
|
|
{
|
|
struct us5182d_data *data = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
ret = us5182d_update_dark_th(data, US5182D_CFG1_AGAIN_DEFAULT);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = i2c_smbus_write_byte_data(data->client,
|
|
US5182D_REG_AUTO_LDARK_GAIN,
|
|
data->lower_dark_gain);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = i2c_smbus_write_byte_data(data->client,
|
|
US5182D_REG_AUTO_HDARK_GAIN,
|
|
data->upper_dark_gain);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return i2c_smbus_write_byte_data(data->client, US5182D_REG_DARK_AUTO_EN,
|
|
US5182D_REG_DARK_AUTO_EN_DEFAULT);
|
|
}
|
|
|
|
static irqreturn_t us5182d_irq_thread_handler(int irq, void *private)
|
|
{
|
|
struct iio_dev *indio_dev = private;
|
|
struct us5182d_data *data = iio_priv(indio_dev);
|
|
enum iio_event_direction dir;
|
|
int ret;
|
|
u64 ev;
|
|
|
|
ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
|
|
if (ret < 0) {
|
|
dev_err(&data->client->dev, "i2c transfer error in irq\n");
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
dir = ret & US5182D_CFG0_PROX ? IIO_EV_DIR_RISING : IIO_EV_DIR_FALLING;
|
|
ev = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1, IIO_EV_TYPE_THRESH, dir);
|
|
|
|
iio_push_event(indio_dev, ev, iio_get_time_ns(indio_dev));
|
|
|
|
ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0,
|
|
ret & ~US5182D_CFG0_PX_IRQ);
|
|
if (ret < 0)
|
|
dev_err(&data->client->dev, "i2c transfer error in irq\n");
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int us5182d_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct us5182d_data *data;
|
|
struct iio_dev *indio_dev;
|
|
int ret;
|
|
|
|
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
|
|
if (!indio_dev)
|
|
return -ENOMEM;
|
|
|
|
data = iio_priv(indio_dev);
|
|
i2c_set_clientdata(client, indio_dev);
|
|
data->client = client;
|
|
|
|
mutex_init(&data->lock);
|
|
|
|
indio_dev->dev.parent = &client->dev;
|
|
indio_dev->info = &us5182d_info;
|
|
indio_dev->name = US5182D_DRV_NAME;
|
|
indio_dev->channels = us5182d_channels;
|
|
indio_dev->num_channels = ARRAY_SIZE(us5182d_channels);
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
|
|
ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CHIPID);
|
|
if (ret != US5182D_CHIPID) {
|
|
dev_err(&data->client->dev,
|
|
"Failed to detect US5182 light chip\n");
|
|
return (ret < 0) ? ret : -ENODEV;
|
|
}
|
|
|
|
if (client->irq > 0) {
|
|
ret = devm_request_threaded_irq(&client->dev, client->irq, NULL,
|
|
us5182d_irq_thread_handler,
|
|
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
|
|
"us5182d-irq", indio_dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
} else
|
|
dev_warn(&client->dev, "no valid irq found\n");
|
|
|
|
us5182d_get_platform_data(indio_dev);
|
|
ret = us5182d_init(indio_dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = us5182d_dark_gain_config(indio_dev);
|
|
if (ret < 0)
|
|
goto out_err;
|
|
|
|
if (data->default_continuous) {
|
|
ret = pm_runtime_set_active(&client->dev);
|
|
if (ret < 0)
|
|
goto out_err;
|
|
}
|
|
|
|
pm_runtime_enable(&client->dev);
|
|
pm_runtime_set_autosuspend_delay(&client->dev,
|
|
US5182D_SLEEP_MS);
|
|
pm_runtime_use_autosuspend(&client->dev);
|
|
|
|
ret = iio_device_register(indio_dev);
|
|
if (ret < 0)
|
|
goto out_err;
|
|
|
|
return 0;
|
|
|
|
out_err:
|
|
us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
|
|
return ret;
|
|
|
|
}
|
|
|
|
static int us5182d_remove(struct i2c_client *client)
|
|
{
|
|
struct us5182d_data *data = iio_priv(i2c_get_clientdata(client));
|
|
|
|
iio_device_unregister(i2c_get_clientdata(client));
|
|
|
|
pm_runtime_disable(&client->dev);
|
|
pm_runtime_set_suspended(&client->dev);
|
|
|
|
return us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
|
|
}
|
|
|
|
#if defined(CONFIG_PM_SLEEP) || defined(CONFIG_PM)
|
|
static int us5182d_suspend(struct device *dev)
|
|
{
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct us5182d_data *data = iio_priv(indio_dev);
|
|
|
|
if (data->power_mode == US5182D_CONTINUOUS)
|
|
return us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int us5182d_resume(struct device *dev)
|
|
{
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct us5182d_data *data = iio_priv(indio_dev);
|
|
|
|
if (data->power_mode == US5182D_CONTINUOUS)
|
|
return us5182d_shutdown_en(data,
|
|
~US5182D_CFG0_SHUTDOWN_EN & 0xff);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static const struct dev_pm_ops us5182d_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(us5182d_suspend, us5182d_resume)
|
|
SET_RUNTIME_PM_OPS(us5182d_suspend, us5182d_resume, NULL)
|
|
};
|
|
|
|
static const struct acpi_device_id us5182d_acpi_match[] = {
|
|
{ "USD5182", 0},
|
|
{}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(acpi, us5182d_acpi_match);
|
|
|
|
static const struct i2c_device_id us5182d_id[] = {
|
|
{"usd5182", 0},
|
|
{}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, us5182d_id);
|
|
|
|
static const struct of_device_id us5182d_of_match[] = {
|
|
{ .compatible = "upisemi,usd5182" },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, us5182d_of_match);
|
|
|
|
static struct i2c_driver us5182d_driver = {
|
|
.driver = {
|
|
.name = US5182D_DRV_NAME,
|
|
.pm = &us5182d_pm_ops,
|
|
.of_match_table = us5182d_of_match,
|
|
.acpi_match_table = ACPI_PTR(us5182d_acpi_match),
|
|
},
|
|
.probe = us5182d_probe,
|
|
.remove = us5182d_remove,
|
|
.id_table = us5182d_id,
|
|
|
|
};
|
|
module_i2c_driver(us5182d_driver);
|
|
|
|
MODULE_AUTHOR("Adriana Reus <adriana.reus@intel.com>");
|
|
MODULE_DESCRIPTION("Driver for us5182d Proximity and Light Sensor");
|
|
MODULE_LICENSE("GPL v2");
|