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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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a57504144c
Move ISL29018/ISL29023/ISL29035 driver out of staging into mainline. Signed-off-by: Brian Masney <masneyb@onstation.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
848 lines
21 KiB
C
848 lines
21 KiB
C
/*
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* A iio driver for the light sensor ISL 29018/29023/29035.
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*
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* IIO driver for monitoring ambient light intensity in luxi, proximity
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* sensing and infrared sensing.
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*
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* Copyright (c) 2010, NVIDIA Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that 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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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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#include <linux/delay.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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#include <linux/acpi.h>
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#define ISL29018_CONV_TIME_MS 100
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#define ISL29018_REG_ADD_COMMAND1 0x00
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#define ISL29018_CMD1_OPMODE_SHIFT 5
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#define ISL29018_CMD1_OPMODE_MASK (7 << ISL29018_CMD1_OPMODE_SHIFT)
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#define ISL29018_CMD1_OPMODE_POWER_DOWN 0
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#define ISL29018_CMD1_OPMODE_ALS_ONCE 1
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#define ISL29018_CMD1_OPMODE_IR_ONCE 2
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#define ISL29018_CMD1_OPMODE_PROX_ONCE 3
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#define ISL29018_REG_ADD_COMMAND2 0x01
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#define ISL29018_CMD2_RESOLUTION_SHIFT 2
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#define ISL29018_CMD2_RESOLUTION_MASK (0x3 << ISL29018_CMD2_RESOLUTION_SHIFT)
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#define ISL29018_CMD2_RANGE_SHIFT 0
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#define ISL29018_CMD2_RANGE_MASK (0x3 << ISL29018_CMD2_RANGE_SHIFT)
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#define ISL29018_CMD2_SCHEME_SHIFT 7
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#define ISL29018_CMD2_SCHEME_MASK (0x1 << ISL29018_CMD2_SCHEME_SHIFT)
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#define ISL29018_REG_ADD_DATA_LSB 0x02
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#define ISL29018_REG_ADD_DATA_MSB 0x03
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#define ISL29018_REG_TEST 0x08
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#define ISL29018_TEST_SHIFT 0
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#define ISL29018_TEST_MASK (0xFF << ISL29018_TEST_SHIFT)
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#define ISL29035_REG_DEVICE_ID 0x0F
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#define ISL29035_DEVICE_ID_SHIFT 0x03
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#define ISL29035_DEVICE_ID_MASK (0x7 << ISL29035_DEVICE_ID_SHIFT)
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#define ISL29035_DEVICE_ID 0x5
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#define ISL29035_BOUT_SHIFT 0x07
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#define ISL29035_BOUT_MASK (0x01 << ISL29035_BOUT_SHIFT)
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enum isl29018_int_time {
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ISL29018_INT_TIME_16,
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ISL29018_INT_TIME_12,
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ISL29018_INT_TIME_8,
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ISL29018_INT_TIME_4,
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};
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static const unsigned int isl29018_int_utimes[3][4] = {
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{90000, 5630, 351, 21},
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{90000, 5600, 352, 22},
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{105000, 6500, 410, 25},
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};
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static const struct isl29018_scale {
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unsigned int scale;
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unsigned int uscale;
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} isl29018_scales[4][4] = {
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{ {0, 15258}, {0, 61035}, {0, 244140}, {0, 976562} },
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{ {0, 244140}, {0, 976562}, {3, 906250}, {15, 625000} },
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{ {3, 906250}, {15, 625000}, {62, 500000}, {250, 0} },
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{ {62, 500000}, {250, 0}, {1000, 0}, {4000, 0} }
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};
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struct isl29018_chip {
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struct regmap *regmap;
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struct mutex lock;
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int type;
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unsigned int calibscale;
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unsigned int ucalibscale;
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unsigned int int_time;
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struct isl29018_scale scale;
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int prox_scheme;
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bool suspended;
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};
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static int isl29018_set_integration_time(struct isl29018_chip *chip,
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unsigned int utime)
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{
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unsigned int i;
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int ret;
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unsigned int int_time, new_int_time;
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for (i = 0; i < ARRAY_SIZE(isl29018_int_utimes[chip->type]); ++i) {
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if (utime == isl29018_int_utimes[chip->type][i]) {
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new_int_time = i;
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break;
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}
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}
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if (i >= ARRAY_SIZE(isl29018_int_utimes[chip->type]))
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return -EINVAL;
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ret = regmap_update_bits(chip->regmap, ISL29018_REG_ADD_COMMAND2,
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ISL29018_CMD2_RESOLUTION_MASK,
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i << ISL29018_CMD2_RESOLUTION_SHIFT);
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if (ret < 0)
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return ret;
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/* Keep the same range when integration time changes */
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int_time = chip->int_time;
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for (i = 0; i < ARRAY_SIZE(isl29018_scales[int_time]); ++i) {
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if (chip->scale.scale == isl29018_scales[int_time][i].scale &&
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chip->scale.uscale == isl29018_scales[int_time][i].uscale) {
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chip->scale = isl29018_scales[new_int_time][i];
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break;
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}
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}
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chip->int_time = new_int_time;
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return 0;
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}
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static int isl29018_set_scale(struct isl29018_chip *chip, int scale, int uscale)
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{
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unsigned int i;
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int ret;
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struct isl29018_scale new_scale;
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for (i = 0; i < ARRAY_SIZE(isl29018_scales[chip->int_time]); ++i) {
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if (scale == isl29018_scales[chip->int_time][i].scale &&
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uscale == isl29018_scales[chip->int_time][i].uscale) {
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new_scale = isl29018_scales[chip->int_time][i];
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break;
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}
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}
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if (i >= ARRAY_SIZE(isl29018_scales[chip->int_time]))
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return -EINVAL;
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ret = regmap_update_bits(chip->regmap, ISL29018_REG_ADD_COMMAND2,
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ISL29018_CMD2_RANGE_MASK,
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i << ISL29018_CMD2_RANGE_SHIFT);
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if (ret < 0)
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return ret;
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chip->scale = new_scale;
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return 0;
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}
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static int isl29018_read_sensor_input(struct isl29018_chip *chip, int mode)
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{
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int status;
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unsigned int lsb;
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unsigned int msb;
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struct device *dev = regmap_get_device(chip->regmap);
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/* Set mode */
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status = regmap_write(chip->regmap, ISL29018_REG_ADD_COMMAND1,
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mode << ISL29018_CMD1_OPMODE_SHIFT);
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if (status) {
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dev_err(dev,
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"Error in setting operating mode err %d\n", status);
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return status;
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}
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msleep(ISL29018_CONV_TIME_MS);
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status = regmap_read(chip->regmap, ISL29018_REG_ADD_DATA_LSB, &lsb);
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if (status < 0) {
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dev_err(dev,
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"Error in reading LSB DATA with err %d\n", status);
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return status;
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}
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status = regmap_read(chip->regmap, ISL29018_REG_ADD_DATA_MSB, &msb);
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if (status < 0) {
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dev_err(dev,
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"Error in reading MSB DATA with error %d\n", status);
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return status;
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}
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dev_vdbg(dev, "MSB 0x%x and LSB 0x%x\n", msb, lsb);
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return (msb << 8) | lsb;
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}
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static int isl29018_read_lux(struct isl29018_chip *chip, int *lux)
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{
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int lux_data;
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unsigned int data_x_range;
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lux_data = isl29018_read_sensor_input(chip,
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ISL29018_CMD1_OPMODE_ALS_ONCE);
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if (lux_data < 0)
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return lux_data;
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data_x_range = lux_data * chip->scale.scale +
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lux_data * chip->scale.uscale / 1000000;
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*lux = data_x_range * chip->calibscale +
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data_x_range * chip->ucalibscale / 1000000;
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return 0;
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}
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static int isl29018_read_ir(struct isl29018_chip *chip, int *ir)
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{
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int ir_data;
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ir_data = isl29018_read_sensor_input(chip,
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ISL29018_CMD1_OPMODE_IR_ONCE);
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if (ir_data < 0)
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return ir_data;
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*ir = ir_data;
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return 0;
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}
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static int isl29018_read_proximity_ir(struct isl29018_chip *chip, int scheme,
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int *near_ir)
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{
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int status;
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int prox_data = -1;
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int ir_data = -1;
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struct device *dev = regmap_get_device(chip->regmap);
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/* Do proximity sensing with required scheme */
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status = regmap_update_bits(chip->regmap, ISL29018_REG_ADD_COMMAND2,
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ISL29018_CMD2_SCHEME_MASK,
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scheme << ISL29018_CMD2_SCHEME_SHIFT);
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if (status) {
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dev_err(dev, "Error in setting operating mode\n");
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return status;
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}
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prox_data = isl29018_read_sensor_input(chip,
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ISL29018_CMD1_OPMODE_PROX_ONCE);
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if (prox_data < 0)
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return prox_data;
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if (scheme == 1) {
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*near_ir = prox_data;
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return 0;
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}
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ir_data = isl29018_read_sensor_input(chip,
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ISL29018_CMD1_OPMODE_IR_ONCE);
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if (ir_data < 0)
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return ir_data;
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if (prox_data >= ir_data)
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*near_ir = prox_data - ir_data;
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else
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*near_ir = 0;
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return 0;
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}
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static ssize_t in_illuminance_scale_available_show
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(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *indio_dev = dev_to_iio_dev(dev);
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struct isl29018_chip *chip = iio_priv(indio_dev);
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unsigned int i;
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int len = 0;
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mutex_lock(&chip->lock);
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for (i = 0; i < ARRAY_SIZE(isl29018_scales[chip->int_time]); ++i)
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len += sprintf(buf + len, "%d.%06d ",
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isl29018_scales[chip->int_time][i].scale,
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isl29018_scales[chip->int_time][i].uscale);
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mutex_unlock(&chip->lock);
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buf[len - 1] = '\n';
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return len;
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}
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static ssize_t in_illuminance_integration_time_available_show
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(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *indio_dev = dev_to_iio_dev(dev);
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struct isl29018_chip *chip = iio_priv(indio_dev);
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unsigned int i;
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int len = 0;
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for (i = 0; i < ARRAY_SIZE(isl29018_int_utimes[chip->type]); ++i)
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len += sprintf(buf + len, "0.%06d ",
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isl29018_int_utimes[chip->type][i]);
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buf[len - 1] = '\n';
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return len;
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}
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/*
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* From ISL29018 Data Sheet (FN6619.4, Oct 8, 2012) regarding the
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* infrared suppression:
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*
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* Proximity Sensing Scheme: Bit 7. This bit programs the function
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* of the proximity detection. Logic 0 of this bit, Scheme 0, makes
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* full n (4, 8, 12, 16) bits (unsigned) proximity detection. The range
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* of Scheme 0 proximity count is from 0 to 2^n. Logic 1 of this bit,
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* Scheme 1, makes n-1 (3, 7, 11, 15) bits (2's complementary)
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* proximity_less_ambient detection. The range of Scheme 1
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* proximity count is from -2^(n-1) to 2^(n-1) . The sign bit is extended
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* for resolutions less than 16. While Scheme 0 has wider dynamic
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* range, Scheme 1 proximity detection is less affected by the
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* ambient IR noise variation.
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*
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* 0 Sensing IR from LED and ambient
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* 1 Sensing IR from LED with ambient IR rejection
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*/
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static ssize_t proximity_on_chip_ambient_infrared_suppression_show
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(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *indio_dev = dev_to_iio_dev(dev);
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struct isl29018_chip *chip = iio_priv(indio_dev);
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/*
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* Return the "proximity scheme" i.e. if the chip does on chip
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* infrared suppression (1 means perform on chip suppression)
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*/
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return sprintf(buf, "%d\n", chip->prox_scheme);
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}
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static ssize_t proximity_on_chip_ambient_infrared_suppression_store
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(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct iio_dev *indio_dev = dev_to_iio_dev(dev);
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struct isl29018_chip *chip = iio_priv(indio_dev);
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int val;
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if (kstrtoint(buf, 10, &val))
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return -EINVAL;
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if (!(val == 0 || val == 1))
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return -EINVAL;
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/*
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* Get the "proximity scheme" i.e. if the chip does on chip
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* infrared suppression (1 means perform on chip suppression)
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*/
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mutex_lock(&chip->lock);
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chip->prox_scheme = val;
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mutex_unlock(&chip->lock);
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return count;
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}
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static int isl29018_write_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int val,
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int val2,
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long mask)
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{
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struct isl29018_chip *chip = iio_priv(indio_dev);
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int ret = -EINVAL;
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mutex_lock(&chip->lock);
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if (chip->suspended) {
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ret = -EBUSY;
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goto write_done;
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}
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switch (mask) {
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case IIO_CHAN_INFO_CALIBSCALE:
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if (chan->type == IIO_LIGHT) {
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chip->calibscale = val;
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chip->ucalibscale = val2;
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ret = 0;
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}
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break;
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case IIO_CHAN_INFO_INT_TIME:
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if (chan->type == IIO_LIGHT && !val)
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ret = isl29018_set_integration_time(chip, val2);
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break;
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case IIO_CHAN_INFO_SCALE:
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if (chan->type == IIO_LIGHT)
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ret = isl29018_set_scale(chip, val, val2);
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break;
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default:
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break;
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}
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write_done:
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mutex_unlock(&chip->lock);
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return ret;
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}
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static int isl29018_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int *val,
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int *val2,
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long mask)
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{
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int ret = -EINVAL;
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struct isl29018_chip *chip = iio_priv(indio_dev);
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mutex_lock(&chip->lock);
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if (chip->suspended) {
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ret = -EBUSY;
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goto read_done;
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}
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switch (mask) {
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case IIO_CHAN_INFO_RAW:
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case IIO_CHAN_INFO_PROCESSED:
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switch (chan->type) {
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case IIO_LIGHT:
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ret = isl29018_read_lux(chip, val);
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break;
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case IIO_INTENSITY:
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ret = isl29018_read_ir(chip, val);
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break;
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case IIO_PROXIMITY:
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ret = isl29018_read_proximity_ir(chip,
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chip->prox_scheme,
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val);
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break;
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default:
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break;
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}
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if (!ret)
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ret = IIO_VAL_INT;
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break;
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case IIO_CHAN_INFO_INT_TIME:
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if (chan->type == IIO_LIGHT) {
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*val = 0;
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*val2 = isl29018_int_utimes[chip->type][chip->int_time];
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ret = IIO_VAL_INT_PLUS_MICRO;
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}
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break;
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case IIO_CHAN_INFO_SCALE:
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if (chan->type == IIO_LIGHT) {
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*val = chip->scale.scale;
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*val2 = chip->scale.uscale;
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ret = IIO_VAL_INT_PLUS_MICRO;
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}
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break;
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case IIO_CHAN_INFO_CALIBSCALE:
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if (chan->type == IIO_LIGHT) {
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*val = chip->calibscale;
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*val2 = chip->ucalibscale;
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ret = IIO_VAL_INT_PLUS_MICRO;
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}
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break;
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default:
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break;
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}
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read_done:
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mutex_unlock(&chip->lock);
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return ret;
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}
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|
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#define ISL29018_LIGHT_CHANNEL { \
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.type = IIO_LIGHT, \
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.indexed = 1, \
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.channel = 0, \
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.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | \
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BIT(IIO_CHAN_INFO_CALIBSCALE) | \
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BIT(IIO_CHAN_INFO_SCALE) | \
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BIT(IIO_CHAN_INFO_INT_TIME), \
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}
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|
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#define ISL29018_IR_CHANNEL { \
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.type = IIO_INTENSITY, \
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.modified = 1, \
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
|
|
.channel2 = IIO_MOD_LIGHT_IR, \
|
|
}
|
|
|
|
#define ISL29018_PROXIMITY_CHANNEL { \
|
|
.type = IIO_PROXIMITY, \
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
|
|
}
|
|
|
|
static const struct iio_chan_spec isl29018_channels[] = {
|
|
ISL29018_LIGHT_CHANNEL,
|
|
ISL29018_IR_CHANNEL,
|
|
ISL29018_PROXIMITY_CHANNEL,
|
|
};
|
|
|
|
static const struct iio_chan_spec isl29023_channels[] = {
|
|
ISL29018_LIGHT_CHANNEL,
|
|
ISL29018_IR_CHANNEL,
|
|
};
|
|
|
|
static IIO_DEVICE_ATTR_RO(in_illuminance_integration_time_available, 0);
|
|
static IIO_DEVICE_ATTR_RO(in_illuminance_scale_available, 0);
|
|
static IIO_DEVICE_ATTR_RW(proximity_on_chip_ambient_infrared_suppression, 0);
|
|
|
|
#define ISL29018_DEV_ATTR(name) (&iio_dev_attr_##name.dev_attr.attr)
|
|
|
|
static struct attribute *isl29018_attributes[] = {
|
|
ISL29018_DEV_ATTR(in_illuminance_scale_available),
|
|
ISL29018_DEV_ATTR(in_illuminance_integration_time_available),
|
|
ISL29018_DEV_ATTR(proximity_on_chip_ambient_infrared_suppression),
|
|
NULL
|
|
};
|
|
|
|
static struct attribute *isl29023_attributes[] = {
|
|
ISL29018_DEV_ATTR(in_illuminance_scale_available),
|
|
ISL29018_DEV_ATTR(in_illuminance_integration_time_available),
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group isl29018_group = {
|
|
.attrs = isl29018_attributes,
|
|
};
|
|
|
|
static const struct attribute_group isl29023_group = {
|
|
.attrs = isl29023_attributes,
|
|
};
|
|
|
|
enum {
|
|
isl29018,
|
|
isl29023,
|
|
isl29035,
|
|
};
|
|
|
|
static int isl29018_chip_init(struct isl29018_chip *chip)
|
|
{
|
|
int status;
|
|
struct device *dev = regmap_get_device(chip->regmap);
|
|
|
|
if (chip->type == isl29035) {
|
|
unsigned int id;
|
|
|
|
status = regmap_read(chip->regmap, ISL29035_REG_DEVICE_ID, &id);
|
|
if (status < 0) {
|
|
dev_err(dev,
|
|
"Error reading ID register with error %d\n",
|
|
status);
|
|
return status;
|
|
}
|
|
|
|
id = (id & ISL29035_DEVICE_ID_MASK) >> ISL29035_DEVICE_ID_SHIFT;
|
|
|
|
if (id != ISL29035_DEVICE_ID)
|
|
return -ENODEV;
|
|
|
|
/* Clear brownout bit */
|
|
status = regmap_update_bits(chip->regmap,
|
|
ISL29035_REG_DEVICE_ID,
|
|
ISL29035_BOUT_MASK, 0);
|
|
if (status < 0)
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Code added per Intersil Application Note 1534:
|
|
* When VDD sinks to approximately 1.8V or below, some of
|
|
* the part's registers may change their state. When VDD
|
|
* recovers to 2.25V (or greater), the part may thus be in an
|
|
* unknown mode of operation. The user can return the part to
|
|
* a known mode of operation either by (a) setting VDD = 0V for
|
|
* 1 second or more and then powering back up with a slew rate
|
|
* of 0.5V/ms or greater, or (b) via I2C disable all ALS/PROX
|
|
* conversions, clear the test registers, and then rewrite all
|
|
* registers to the desired values.
|
|
* ...
|
|
* For ISL29011, ISL29018, ISL29021, ISL29023
|
|
* 1. Write 0x00 to register 0x08 (TEST)
|
|
* 2. Write 0x00 to register 0x00 (CMD1)
|
|
* 3. Rewrite all registers to the desired values
|
|
*
|
|
* ISL29018 Data Sheet (FN6619.1, Feb 11, 2010) essentially says
|
|
* the same thing EXCEPT the data sheet asks for a 1ms delay after
|
|
* writing the CMD1 register.
|
|
*/
|
|
status = regmap_write(chip->regmap, ISL29018_REG_TEST, 0x0);
|
|
if (status < 0) {
|
|
dev_err(dev, "Failed to clear isl29018 TEST reg.(%d)\n",
|
|
status);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* See Intersil AN1534 comments above.
|
|
* "Operating Mode" (COMMAND1) register is reprogrammed when
|
|
* data is read from the device.
|
|
*/
|
|
status = regmap_write(chip->regmap, ISL29018_REG_ADD_COMMAND1, 0);
|
|
if (status < 0) {
|
|
dev_err(dev, "Failed to clear isl29018 CMD1 reg.(%d)\n",
|
|
status);
|
|
return status;
|
|
}
|
|
|
|
usleep_range(1000, 2000); /* per data sheet, page 10 */
|
|
|
|
/* Set defaults */
|
|
status = isl29018_set_scale(chip, chip->scale.scale,
|
|
chip->scale.uscale);
|
|
if (status < 0) {
|
|
dev_err(dev, "Init of isl29018 fails\n");
|
|
return status;
|
|
}
|
|
|
|
status = isl29018_set_integration_time(chip,
|
|
isl29018_int_utimes[chip->type][chip->int_time]);
|
|
if (status < 0)
|
|
dev_err(dev, "Init of isl29018 fails\n");
|
|
|
|
return status;
|
|
}
|
|
|
|
static const struct iio_info isl29018_info = {
|
|
.attrs = &isl29018_group,
|
|
.driver_module = THIS_MODULE,
|
|
.read_raw = isl29018_read_raw,
|
|
.write_raw = isl29018_write_raw,
|
|
};
|
|
|
|
static const struct iio_info isl29023_info = {
|
|
.attrs = &isl29023_group,
|
|
.driver_module = THIS_MODULE,
|
|
.read_raw = isl29018_read_raw,
|
|
.write_raw = isl29018_write_raw,
|
|
};
|
|
|
|
static bool isl29018_is_volatile_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case ISL29018_REG_ADD_DATA_LSB:
|
|
case ISL29018_REG_ADD_DATA_MSB:
|
|
case ISL29018_REG_ADD_COMMAND1:
|
|
case ISL29018_REG_TEST:
|
|
case ISL29035_REG_DEVICE_ID:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static const struct regmap_config isl29018_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.volatile_reg = isl29018_is_volatile_reg,
|
|
.max_register = ISL29018_REG_TEST,
|
|
.num_reg_defaults_raw = ISL29018_REG_TEST + 1,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
};
|
|
|
|
static const struct regmap_config isl29035_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.volatile_reg = isl29018_is_volatile_reg,
|
|
.max_register = ISL29035_REG_DEVICE_ID,
|
|
.num_reg_defaults_raw = ISL29035_REG_DEVICE_ID + 1,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
};
|
|
|
|
struct isl29018_chip_info {
|
|
const struct iio_chan_spec *channels;
|
|
int num_channels;
|
|
const struct iio_info *indio_info;
|
|
const struct regmap_config *regmap_cfg;
|
|
};
|
|
|
|
static const struct isl29018_chip_info isl29018_chip_info_tbl[] = {
|
|
[isl29018] = {
|
|
.channels = isl29018_channels,
|
|
.num_channels = ARRAY_SIZE(isl29018_channels),
|
|
.indio_info = &isl29018_info,
|
|
.regmap_cfg = &isl29018_regmap_config,
|
|
},
|
|
[isl29023] = {
|
|
.channels = isl29023_channels,
|
|
.num_channels = ARRAY_SIZE(isl29023_channels),
|
|
.indio_info = &isl29023_info,
|
|
.regmap_cfg = &isl29018_regmap_config,
|
|
},
|
|
[isl29035] = {
|
|
.channels = isl29023_channels,
|
|
.num_channels = ARRAY_SIZE(isl29023_channels),
|
|
.indio_info = &isl29023_info,
|
|
.regmap_cfg = &isl29035_regmap_config,
|
|
},
|
|
};
|
|
|
|
static const char *isl29018_match_acpi_device(struct device *dev, int *data)
|
|
{
|
|
const struct acpi_device_id *id;
|
|
|
|
id = acpi_match_device(dev->driver->acpi_match_table, dev);
|
|
|
|
if (!id)
|
|
return NULL;
|
|
|
|
*data = (int)id->driver_data;
|
|
|
|
return dev_name(dev);
|
|
}
|
|
|
|
static int isl29018_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct isl29018_chip *chip;
|
|
struct iio_dev *indio_dev;
|
|
int err;
|
|
const char *name = NULL;
|
|
int dev_id = 0;
|
|
|
|
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));
|
|
if (!indio_dev)
|
|
return -ENOMEM;
|
|
|
|
chip = iio_priv(indio_dev);
|
|
|
|
i2c_set_clientdata(client, indio_dev);
|
|
|
|
if (id) {
|
|
name = id->name;
|
|
dev_id = id->driver_data;
|
|
}
|
|
|
|
if (ACPI_HANDLE(&client->dev))
|
|
name = isl29018_match_acpi_device(&client->dev, &dev_id);
|
|
|
|
mutex_init(&chip->lock);
|
|
|
|
chip->type = dev_id;
|
|
chip->calibscale = 1;
|
|
chip->ucalibscale = 0;
|
|
chip->int_time = ISL29018_INT_TIME_16;
|
|
chip->scale = isl29018_scales[chip->int_time][0];
|
|
chip->suspended = false;
|
|
|
|
chip->regmap = devm_regmap_init_i2c(client,
|
|
isl29018_chip_info_tbl[dev_id].regmap_cfg);
|
|
if (IS_ERR(chip->regmap)) {
|
|
err = PTR_ERR(chip->regmap);
|
|
dev_err(&client->dev, "regmap initialization fails: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
err = isl29018_chip_init(chip);
|
|
if (err)
|
|
return err;
|
|
|
|
indio_dev->info = isl29018_chip_info_tbl[dev_id].indio_info;
|
|
indio_dev->channels = isl29018_chip_info_tbl[dev_id].channels;
|
|
indio_dev->num_channels = isl29018_chip_info_tbl[dev_id].num_channels;
|
|
indio_dev->name = name;
|
|
indio_dev->dev.parent = &client->dev;
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
|
|
return devm_iio_device_register(&client->dev, indio_dev);
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int isl29018_suspend(struct device *dev)
|
|
{
|
|
struct isl29018_chip *chip = iio_priv(dev_get_drvdata(dev));
|
|
|
|
mutex_lock(&chip->lock);
|
|
|
|
/*
|
|
* Since this driver uses only polling commands, we are by default in
|
|
* auto shutdown (ie, power-down) mode.
|
|
* So we do not have much to do here.
|
|
*/
|
|
chip->suspended = true;
|
|
|
|
mutex_unlock(&chip->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int isl29018_resume(struct device *dev)
|
|
{
|
|
struct isl29018_chip *chip = iio_priv(dev_get_drvdata(dev));
|
|
int err;
|
|
|
|
mutex_lock(&chip->lock);
|
|
|
|
err = isl29018_chip_init(chip);
|
|
if (!err)
|
|
chip->suspended = false;
|
|
|
|
mutex_unlock(&chip->lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static SIMPLE_DEV_PM_OPS(isl29018_pm_ops, isl29018_suspend, isl29018_resume);
|
|
#define ISL29018_PM_OPS (&isl29018_pm_ops)
|
|
#else
|
|
#define ISL29018_PM_OPS NULL
|
|
#endif
|
|
|
|
static const struct acpi_device_id isl29018_acpi_match[] = {
|
|
{"ISL29018", isl29018},
|
|
{"ISL29023", isl29023},
|
|
{"ISL29035", isl29035},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, isl29018_acpi_match);
|
|
|
|
static const struct i2c_device_id isl29018_id[] = {
|
|
{"isl29018", isl29018},
|
|
{"isl29023", isl29023},
|
|
{"isl29035", isl29035},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, isl29018_id);
|
|
|
|
static const struct of_device_id isl29018_of_match[] = {
|
|
{ .compatible = "isil,isl29018", },
|
|
{ .compatible = "isil,isl29023", },
|
|
{ .compatible = "isil,isl29035", },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, isl29018_of_match);
|
|
|
|
static struct i2c_driver isl29018_driver = {
|
|
.driver = {
|
|
.name = "isl29018",
|
|
.acpi_match_table = ACPI_PTR(isl29018_acpi_match),
|
|
.pm = ISL29018_PM_OPS,
|
|
.of_match_table = isl29018_of_match,
|
|
},
|
|
.probe = isl29018_probe,
|
|
.id_table = isl29018_id,
|
|
};
|
|
module_i2c_driver(isl29018_driver);
|
|
|
|
MODULE_DESCRIPTION("ISL29018 Ambient Light Sensor driver");
|
|
MODULE_LICENSE("GPL");
|