2009-11-09 14:14:28 +01:00
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/*
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* drivers/i2c/chips/tsl2563.c
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*
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* Copyright (C) 2008 Nokia Corporation
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*
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* Written by Timo O. Karjalainen <timo.o.karjalainen@nokia.com>
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* Contact: Amit Kucheria <amit.kucheria@verdurent.com>
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*
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* Converted to IIO driver
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* Amit Kucheria <amit.kucheria@verdurent.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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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/interrupt.h>
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#include <linux/sched.h>
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#include <linux/mutex.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <linux/hwmon.h>
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#include <linux/err.h>
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#include "../iio.h"
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#include "tsl2563.h"
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/* Use this many bits for fraction part. */
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#define ADC_FRAC_BITS (14)
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/* Given number of 1/10000's in ADC_FRAC_BITS precision. */
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#define FRAC10K(f) (((f) * (1L << (ADC_FRAC_BITS))) / (10000))
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/* Bits used for fraction in calibration coefficients.*/
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#define CALIB_FRAC_BITS (10)
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/* 0.5 in CALIB_FRAC_BITS precision */
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#define CALIB_FRAC_HALF (1 << (CALIB_FRAC_BITS - 1))
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/* Make a fraction from a number n that was multiplied with b. */
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#define CALIB_FRAC(n, b) (((n) << CALIB_FRAC_BITS) / (b))
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/* Decimal 10^(digits in sysfs presentation) */
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#define CALIB_BASE_SYSFS (1000)
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#define TSL2563_CMD (0x80)
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#define TSL2563_CLEARINT (0x40)
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#define TSL2563_REG_CTRL (0x00)
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#define TSL2563_REG_TIMING (0x01)
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#define TSL2563_REG_LOWLOW (0x02) /* data0 low threshold, 2 bytes */
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#define TSL2563_REG_LOWHIGH (0x03)
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#define TSL2563_REG_HIGHLOW (0x04) /* data0 high threshold, 2 bytes */
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#define TSL2563_REG_HIGHHIGH (0x05)
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#define TSL2563_REG_INT (0x06)
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#define TSL2563_REG_ID (0x0a)
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#define TSL2563_REG_DATA0LOW (0x0c) /* broadband sensor value, 2 bytes */
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#define TSL2563_REG_DATA0HIGH (0x0d)
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#define TSL2563_REG_DATA1LOW (0x0e) /* infrared sensor value, 2 bytes */
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#define TSL2563_REG_DATA1HIGH (0x0f)
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#define TSL2563_CMD_POWER_ON (0x03)
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#define TSL2563_CMD_POWER_OFF (0x00)
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#define TSL2563_CTRL_POWER_MASK (0x03)
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#define TSL2563_TIMING_13MS (0x00)
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#define TSL2563_TIMING_100MS (0x01)
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#define TSL2563_TIMING_400MS (0x02)
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#define TSL2563_TIMING_MASK (0x03)
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#define TSL2563_TIMING_GAIN16 (0x10)
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#define TSL2563_TIMING_GAIN1 (0x00)
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#define TSL2563_INT_DISBLED (0x00)
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#define TSL2563_INT_LEVEL (0x10)
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#define TSL2563_INT_PERSIST(n) ((n) & 0x0F)
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struct tsl2563_gainlevel_coeff {
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u8 gaintime;
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u16 min;
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u16 max;
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};
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static struct tsl2563_gainlevel_coeff tsl2563_gainlevel_table[] = {
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{
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.gaintime = TSL2563_TIMING_400MS | TSL2563_TIMING_GAIN16,
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.min = 0,
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.max = 65534,
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}, {
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.gaintime = TSL2563_TIMING_400MS | TSL2563_TIMING_GAIN1,
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.min = 2048,
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.max = 65534,
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}, {
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.gaintime = TSL2563_TIMING_100MS | TSL2563_TIMING_GAIN1,
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.min = 4095,
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.max = 37177,
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}, {
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.gaintime = TSL2563_TIMING_13MS | TSL2563_TIMING_GAIN1,
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.min = 3000,
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.max = 65535,
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},
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};
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struct tsl2563_chip {
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struct mutex lock;
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struct i2c_client *client;
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struct iio_dev *indio_dev;
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struct delayed_work poweroff_work;
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/* Remember state for suspend and resume functions */
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pm_message_t state;
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struct tsl2563_gainlevel_coeff *gainlevel;
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/* Thresholds are in lux */
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u16 low_thres;
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u16 high_thres;
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u8 intr;
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/* Calibration coefficients */
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u32 calib0;
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u32 calib1;
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int cover_comp_gain;
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/* Cache current values, to be returned while suspended */
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u32 data0;
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u32 data1;
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};
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static int tsl2563_write(struct i2c_client *client, u8 reg, u8 value)
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{
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int ret;
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u8 buf[2];
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buf[0] = TSL2563_CMD | reg;
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buf[1] = value;
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ret = i2c_master_send(client, buf, sizeof(buf));
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return (ret == sizeof(buf)) ? 0 : ret;
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}
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static int tsl2563_read(struct i2c_client *client, u8 reg, void *buf, int len)
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{
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int ret;
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u8 cmd = TSL2563_CMD | reg;
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ret = i2c_master_send(client, &cmd, sizeof(cmd));
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if (ret != sizeof(cmd))
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return ret;
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return i2c_master_recv(client, buf, len);
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}
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static int tsl2563_set_power(struct tsl2563_chip *chip, int on)
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{
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struct i2c_client *client = chip->client;
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u8 cmd;
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cmd = on ? TSL2563_CMD_POWER_ON : TSL2563_CMD_POWER_OFF;
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return tsl2563_write(client, TSL2563_REG_CTRL, cmd);
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}
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/*
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* Return value is 0 for off, 1 for on, or a negative error
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* code if reading failed.
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*/
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static int tsl2563_get_power(struct tsl2563_chip *chip)
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{
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struct i2c_client *client = chip->client;
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int ret;
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u8 val;
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ret = tsl2563_read(client, TSL2563_REG_CTRL, &val, sizeof(val));
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if (ret != sizeof(val))
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return ret;
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return (val & TSL2563_CTRL_POWER_MASK) == TSL2563_CMD_POWER_ON;
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}
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static int tsl2563_configure(struct tsl2563_chip *chip)
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{
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struct i2c_client *client = chip->client;
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int ret;
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ret = tsl2563_write(client, TSL2563_REG_TIMING,
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chip->gainlevel->gaintime);
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if (ret)
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goto out;
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ret = tsl2563_write(client, TSL2563_REG_INT, chip->intr);
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out:
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return ret;
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}
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static void tsl2563_poweroff_work(struct work_struct *work)
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{
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struct tsl2563_chip *chip =
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container_of(work, struct tsl2563_chip, poweroff_work.work);
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tsl2563_set_power(chip, 0);
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}
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static int tsl2563_detect(struct tsl2563_chip *chip)
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{
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int ret;
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ret = tsl2563_set_power(chip, 1);
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if (ret)
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return ret;
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ret = tsl2563_get_power(chip);
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if (ret < 0)
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return ret;
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return ret ? 0 : -ENODEV;
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}
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static int tsl2563_read_id(struct tsl2563_chip *chip, u8 *id)
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{
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struct i2c_client *client = chip->client;
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int ret;
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ret = tsl2563_read(client, TSL2563_REG_ID, id, sizeof(*id));
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if (ret != sizeof(*id))
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return ret;
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return 0;
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}
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/*
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* "Normalized" ADC value is one obtained with 400ms of integration time and
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* 16x gain. This function returns the number of bits of shift needed to
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* convert between normalized values and HW values obtained using given
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* timing and gain settings.
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*/
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static int adc_shiftbits(u8 timing)
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{
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int shift = 0;
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switch (timing & TSL2563_TIMING_MASK) {
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case TSL2563_TIMING_13MS:
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shift += 5;
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break;
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case TSL2563_TIMING_100MS:
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shift += 2;
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break;
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case TSL2563_TIMING_400MS:
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/* no-op */
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break;
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}
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if (!(timing & TSL2563_TIMING_GAIN16))
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shift += 4;
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return shift;
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}
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/* Convert a HW ADC value to normalized scale. */
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static u32 normalize_adc(u16 adc, u8 timing)
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{
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return adc << adc_shiftbits(timing);
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}
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static void tsl2563_wait_adc(struct tsl2563_chip *chip)
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{
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unsigned int delay;
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switch (chip->gainlevel->gaintime & TSL2563_TIMING_MASK) {
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case TSL2563_TIMING_13MS:
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delay = 14;
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break;
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case TSL2563_TIMING_100MS:
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delay = 101;
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break;
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default:
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delay = 402;
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}
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/*
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* TODO: Make sure that we wait at least required delay but why we
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* have to extend it one tick more?
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*/
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schedule_timeout_interruptible(msecs_to_jiffies(delay) + 2);
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}
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static int tsl2563_adjust_gainlevel(struct tsl2563_chip *chip, u16 adc)
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{
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struct i2c_client *client = chip->client;
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if (adc > chip->gainlevel->max || adc < chip->gainlevel->min) {
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(adc > chip->gainlevel->max) ?
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chip->gainlevel++ : chip->gainlevel--;
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tsl2563_write(client, TSL2563_REG_TIMING,
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chip->gainlevel->gaintime);
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tsl2563_wait_adc(chip);
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tsl2563_wait_adc(chip);
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return 1;
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} else
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return 0;
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}
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static int tsl2563_get_adc(struct tsl2563_chip *chip)
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{
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struct i2c_client *client = chip->client;
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u8 buf0[2], buf1[2];
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u16 adc0, adc1;
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int retry = 1;
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int ret = 0;
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if (chip->state.event != PM_EVENT_ON)
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goto out;
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cancel_delayed_work(&chip->poweroff_work);
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if (!tsl2563_get_power(chip)) {
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ret = tsl2563_set_power(chip, 1);
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if (ret)
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goto out;
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ret = tsl2563_configure(chip);
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if (ret)
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goto out;
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tsl2563_wait_adc(chip);
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}
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while (retry) {
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ret = tsl2563_read(client,
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TSL2563_REG_DATA0LOW | TSL2563_CLEARINT,
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buf0, sizeof(buf0));
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if (ret != sizeof(buf0))
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goto out;
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ret = tsl2563_read(client, TSL2563_REG_DATA1LOW,
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buf1, sizeof(buf1));
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if (ret != sizeof(buf1))
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goto out;
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adc0 = (buf0[1] << 8) + buf0[0];
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adc1 = (buf1[1] << 8) + buf1[0];
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retry = tsl2563_adjust_gainlevel(chip, adc0);
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}
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chip->data0 = normalize_adc(adc0, chip->gainlevel->gaintime);
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chip->data1 = normalize_adc(adc1, chip->gainlevel->gaintime);
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schedule_delayed_work(&chip->poweroff_work, 5 * HZ);
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ret = 0;
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out:
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return ret;
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}
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static inline int calib_to_sysfs(u32 calib)
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{
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return (int) (((calib * CALIB_BASE_SYSFS) +
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CALIB_FRAC_HALF) >> CALIB_FRAC_BITS);
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}
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static inline u32 calib_from_sysfs(int value)
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{
|
|
|
|
return (((u32) value) << CALIB_FRAC_BITS) / CALIB_BASE_SYSFS;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Conversions between lux and ADC values.
|
|
|
|
*
|
|
|
|
* The basic formula is lux = c0 * adc0 - c1 * adc1, where c0 and c1 are
|
|
|
|
* appropriate constants. Different constants are needed for different
|
|
|
|
* kinds of light, determined by the ratio adc1/adc0 (basically the ratio
|
|
|
|
* of the intensities in infrared and visible wavelengths). lux_table below
|
|
|
|
* lists the upper threshold of the adc1/adc0 ratio and the corresponding
|
|
|
|
* constants.
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct tsl2563_lux_coeff {
|
|
|
|
unsigned long ch_ratio;
|
|
|
|
unsigned long ch0_coeff;
|
|
|
|
unsigned long ch1_coeff;
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct tsl2563_lux_coeff lux_table[] = {
|
|
|
|
{
|
|
|
|
.ch_ratio = FRAC10K(1300),
|
|
|
|
.ch0_coeff = FRAC10K(315),
|
|
|
|
.ch1_coeff = FRAC10K(262),
|
|
|
|
}, {
|
|
|
|
.ch_ratio = FRAC10K(2600),
|
|
|
|
.ch0_coeff = FRAC10K(337),
|
|
|
|
.ch1_coeff = FRAC10K(430),
|
|
|
|
}, {
|
|
|
|
.ch_ratio = FRAC10K(3900),
|
|
|
|
.ch0_coeff = FRAC10K(363),
|
|
|
|
.ch1_coeff = FRAC10K(529),
|
|
|
|
}, {
|
|
|
|
.ch_ratio = FRAC10K(5200),
|
|
|
|
.ch0_coeff = FRAC10K(392),
|
|
|
|
.ch1_coeff = FRAC10K(605),
|
|
|
|
}, {
|
|
|
|
.ch_ratio = FRAC10K(6500),
|
|
|
|
.ch0_coeff = FRAC10K(229),
|
|
|
|
.ch1_coeff = FRAC10K(291),
|
|
|
|
}, {
|
|
|
|
.ch_ratio = FRAC10K(8000),
|
|
|
|
.ch0_coeff = FRAC10K(157),
|
|
|
|
.ch1_coeff = FRAC10K(180),
|
|
|
|
}, {
|
|
|
|
.ch_ratio = FRAC10K(13000),
|
|
|
|
.ch0_coeff = FRAC10K(34),
|
|
|
|
.ch1_coeff = FRAC10K(26),
|
|
|
|
}, {
|
|
|
|
.ch_ratio = ULONG_MAX,
|
|
|
|
.ch0_coeff = 0,
|
|
|
|
.ch1_coeff = 0,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Convert normalized, scaled ADC values to lux.
|
|
|
|
*/
|
|
|
|
static unsigned int adc_to_lux(u32 adc0, u32 adc1)
|
|
|
|
{
|
|
|
|
const struct tsl2563_lux_coeff *lp = lux_table;
|
|
|
|
unsigned long ratio, lux, ch0 = adc0, ch1 = adc1;
|
|
|
|
|
|
|
|
ratio = ch0 ? ((ch1 << ADC_FRAC_BITS) / ch0) : ULONG_MAX;
|
|
|
|
|
|
|
|
while (lp->ch_ratio < ratio)
|
|
|
|
lp++;
|
|
|
|
|
|
|
|
lux = ch0 * lp->ch0_coeff - ch1 * lp->ch1_coeff;
|
|
|
|
|
|
|
|
return (unsigned int) (lux >> ADC_FRAC_BITS);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*--------------------------------------------------------------*/
|
|
|
|
/* Sysfs interface */
|
|
|
|
/*--------------------------------------------------------------*/
|
|
|
|
|
|
|
|
static ssize_t tsl2563_adc0_show(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
|
|
|
struct tsl2563_chip *chip = indio_dev->dev_data;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
mutex_lock(&chip->lock);
|
|
|
|
|
|
|
|
ret = tsl2563_get_adc(chip);
|
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
ret = snprintf(buf, PAGE_SIZE, "%d\n", chip->data0);
|
|
|
|
out:
|
|
|
|
mutex_unlock(&chip->lock);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t tsl2563_adc1_show(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
|
|
|
struct tsl2563_chip *chip = indio_dev->dev_data;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
mutex_lock(&chip->lock);
|
|
|
|
|
|
|
|
ret = tsl2563_get_adc(chip);
|
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
ret = snprintf(buf, PAGE_SIZE, "%d\n", chip->data1);
|
|
|
|
out:
|
|
|
|
mutex_unlock(&chip->lock);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Apply calibration coefficient to ADC count. */
|
|
|
|
static u32 calib_adc(u32 adc, u32 calib)
|
|
|
|
{
|
|
|
|
unsigned long scaled = adc;
|
|
|
|
|
|
|
|
scaled *= calib;
|
|
|
|
scaled >>= CALIB_FRAC_BITS;
|
|
|
|
|
|
|
|
return (u32) scaled;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t tsl2563_lux_show(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
|
|
|
struct tsl2563_chip *chip = indio_dev->dev_data;
|
|
|
|
u32 calib0, calib1;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
mutex_lock(&chip->lock);
|
|
|
|
|
|
|
|
ret = tsl2563_get_adc(chip);
|
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
calib0 = calib_adc(chip->data0, chip->calib0) * chip->cover_comp_gain;
|
|
|
|
calib1 = calib_adc(chip->data1, chip->calib1) * chip->cover_comp_gain;
|
|
|
|
|
|
|
|
ret = snprintf(buf, PAGE_SIZE, "%d\n", adc_to_lux(calib0, calib1));
|
|
|
|
|
|
|
|
out:
|
|
|
|
mutex_unlock(&chip->lock);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t format_calib(char *buf, int len, u32 calib)
|
|
|
|
{
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", calib_to_sysfs(calib));
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t tsl2563_calib0_show(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
|
|
|
struct tsl2563_chip *chip = indio_dev->dev_data;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
mutex_lock(&chip->lock);
|
|
|
|
ret = format_calib(buf, PAGE_SIZE, chip->calib0);
|
|
|
|
mutex_unlock(&chip->lock);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t tsl2563_calib1_show(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
|
|
|
struct tsl2563_chip *chip = indio_dev->dev_data;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
mutex_lock(&chip->lock);
|
|
|
|
ret = format_calib(buf, PAGE_SIZE, chip->calib1);
|
|
|
|
mutex_unlock(&chip->lock);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int do_calib_store(struct device *dev, const char *buf, size_t len,
|
|
|
|
int ch)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
|
|
|
struct tsl2563_chip *chip = indio_dev->dev_data;
|
|
|
|
int value;
|
|
|
|
u32 calib;
|
|
|
|
|
|
|
|
if (1 != sscanf(buf, "%d", &value))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
calib = calib_from_sysfs(value);
|
|
|
|
|
|
|
|
if (ch)
|
|
|
|
chip->calib1 = calib;
|
|
|
|
else
|
|
|
|
chip->calib0 = calib;
|
|
|
|
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t tsl2563_calib0_store(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t len)
|
|
|
|
{
|
|
|
|
return do_calib_store(dev, buf, len, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t tsl2563_calib1_store(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t len)
|
|
|
|
{
|
|
|
|
return do_calib_store(dev, buf, len, 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* AmitXXXX: Convert to IIO_DEV_ATTR_LIGHT* as in tsl2561
|
|
|
|
* once I understand what they mean */
|
|
|
|
static DEVICE_ATTR(adc0, S_IRUGO, tsl2563_adc0_show, NULL);
|
|
|
|
static DEVICE_ATTR(adc1, S_IRUGO, tsl2563_adc1_show, NULL);
|
|
|
|
static DEVICE_ATTR(lux, S_IRUGO, tsl2563_lux_show, NULL);
|
|
|
|
static DEVICE_ATTR(calib0, S_IRUGO | S_IWUSR,
|
|
|
|
tsl2563_calib0_show, tsl2563_calib0_store);
|
|
|
|
static DEVICE_ATTR(calib1, S_IRUGO | S_IWUSR,
|
|
|
|
tsl2563_calib1_show, tsl2563_calib1_store);
|
|
|
|
|
|
|
|
static struct attribute *tsl2563_attributes[] = {
|
|
|
|
&dev_attr_adc0.attr,
|
|
|
|
&dev_attr_adc1.attr,
|
|
|
|
&dev_attr_lux.attr,
|
|
|
|
&dev_attr_calib0.attr,
|
|
|
|
&dev_attr_calib1.attr,
|
|
|
|
NULL
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct attribute_group tsl2563_group = {
|
|
|
|
.attrs = tsl2563_attributes,
|
|
|
|
};
|
|
|
|
|
|
|
|
/*--------------------------------------------------------------*/
|
|
|
|
/* Probe, Attach, Remove */
|
|
|
|
/*--------------------------------------------------------------*/
|
|
|
|
static struct i2c_driver tsl2563_i2c_driver;
|
|
|
|
|
|
|
|
static int __devinit tsl2563_probe(struct i2c_client *client,
|
|
|
|
const struct i2c_device_id *device_id)
|
|
|
|
{
|
|
|
|
struct tsl2563_chip *chip;
|
|
|
|
struct tsl2563_platform_data *pdata = client->dev.platform_data;
|
|
|
|
int err = 0;
|
|
|
|
int ret;
|
|
|
|
u8 id;
|
|
|
|
|
|
|
|
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
|
|
|
|
if (!chip)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
i2c_set_clientdata(client, chip);
|
|
|
|
chip->client = client;
|
|
|
|
|
|
|
|
err = tsl2563_detect(chip);
|
|
|
|
if (err) {
|
|
|
|
dev_err(&client->dev, "device not found, error %d \n", -err);
|
|
|
|
goto fail1;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = tsl2563_read_id(chip, &id);
|
|
|
|
if (err)
|
|
|
|
goto fail1;
|
|
|
|
|
|
|
|
mutex_init(&chip->lock);
|
|
|
|
|
|
|
|
/* Default values used until userspace says otherwise */
|
|
|
|
chip->low_thres = 0x0;
|
|
|
|
chip->high_thres = 0xffff;
|
|
|
|
chip->gainlevel = tsl2563_gainlevel_table;
|
|
|
|
chip->intr = TSL2563_INT_PERSIST(4);
|
|
|
|
chip->calib0 = calib_from_sysfs(CALIB_BASE_SYSFS);
|
|
|
|
chip->calib1 = calib_from_sysfs(CALIB_BASE_SYSFS);
|
|
|
|
|
|
|
|
if (pdata)
|
|
|
|
chip->cover_comp_gain = pdata->cover_comp_gain;
|
|
|
|
else
|
|
|
|
chip->cover_comp_gain = 1;
|
|
|
|
|
|
|
|
dev_info(&client->dev, "model %d, rev. %d\n", id >> 4, id & 0x0f);
|
|
|
|
|
|
|
|
chip->indio_dev = iio_allocate_device();
|
|
|
|
if (!chip->indio_dev)
|
|
|
|
goto fail1;
|
|
|
|
chip->indio_dev->attrs = &tsl2563_group;
|
|
|
|
chip->indio_dev->dev.parent = &client->dev;
|
|
|
|
chip->indio_dev->dev_data = (void *)(chip);
|
|
|
|
chip->indio_dev->driver_module = THIS_MODULE;
|
|
|
|
chip->indio_dev->modes = INDIO_DIRECT_MODE;
|
|
|
|
ret = iio_device_register(chip->indio_dev);
|
|
|
|
if (ret)
|
|
|
|
goto fail1;
|
|
|
|
|
|
|
|
err = tsl2563_configure(chip);
|
|
|
|
if (err)
|
|
|
|
goto fail2;
|
|
|
|
|
|
|
|
INIT_DELAYED_WORK(&chip->poweroff_work, tsl2563_poweroff_work);
|
|
|
|
schedule_delayed_work(&chip->poweroff_work, 5 * HZ);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
fail2:
|
|
|
|
iio_device_unregister(chip->indio_dev);
|
|
|
|
fail1:
|
|
|
|
kfree(chip);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int tsl2563_remove(struct i2c_client *client)
|
|
|
|
{
|
|
|
|
struct tsl2563_chip *chip = i2c_get_clientdata(client);
|
|
|
|
|
|
|
|
iio_device_unregister(chip->indio_dev);
|
|
|
|
|
|
|
|
kfree(chip);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int tsl2563_suspend(struct i2c_client *client, pm_message_t state)
|
|
|
|
{
|
|
|
|
struct tsl2563_chip *chip = i2c_get_clientdata(client);
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
mutex_lock(&chip->lock);
|
|
|
|
|
|
|
|
ret = tsl2563_set_power(chip, 0);
|
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
chip->state = state;
|
|
|
|
|
|
|
|
out:
|
|
|
|
mutex_unlock(&chip->lock);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int tsl2563_resume(struct i2c_client *client)
|
|
|
|
{
|
|
|
|
struct tsl2563_chip *chip = i2c_get_clientdata(client);
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
mutex_lock(&chip->lock);
|
|
|
|
|
|
|
|
ret = tsl2563_set_power(chip, 1);
|
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
ret = tsl2563_configure(chip);
|
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
chip->state.event = PM_EVENT_ON;
|
|
|
|
|
|
|
|
out:
|
|
|
|
mutex_unlock(&chip->lock);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct i2c_device_id tsl2563_id[] = {
|
2009-11-22 17:03:25 +01:00
|
|
|
{ "tsl2560", 0 },
|
|
|
|
{ "tsl2561", 1 },
|
|
|
|
{ "tsl2562", 2 },
|
|
|
|
{ "tsl2563", 3 },
|
|
|
|
{}
|
2009-11-09 14:14:28 +01:00
|
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, tsl2563_id);
|
|
|
|
|
|
|
|
static struct i2c_driver tsl2563_i2c_driver = {
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.driver = {
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2009-11-22 17:03:25 +01:00
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.name = "tsl2563",
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2009-11-09 14:14:28 +01:00
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},
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.suspend = tsl2563_suspend,
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.resume = tsl2563_resume,
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.probe = tsl2563_probe,
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.remove = __devexit_p(tsl2563_remove),
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.id_table = tsl2563_id,
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};
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static int __init tsl2563_init(void)
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{
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return i2c_add_driver(&tsl2563_i2c_driver);
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}
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static void __exit tsl2563_exit(void)
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{
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i2c_del_driver(&tsl2563_i2c_driver);
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}
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MODULE_AUTHOR("Nokia Corporation");
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MODULE_DESCRIPTION("tsl2563 light sensor driver");
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MODULE_LICENSE("GPL");
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module_init(tsl2563_init);
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module_exit(tsl2563_exit);
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