![Alexandru Ardelean](/assets/img/avatar_default.png)
This patch applies the semantic patch: @@ expression I, P, SP; @@ I = devm_iio_device_alloc(P, SP); ... - I->dev.parent = P; It updates 302 files and does 307 deletions. This semantic patch also removes some comments like '/* Establish that the iio_dev is a child of the i2c device */' But this is is only done in case where the block is left empty. The patch does not seem to cover all cases. It looks like in some cases a different variable is used in some cases to assign the parent, but it points to the same reference. In other cases, the block covered by ... may be just too big to be covered by the semantic patch. However, this looks pretty good as well, as it does cover a big bulk of the drivers that should remove the parent assignment. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
897 lines
21 KiB
C
897 lines
21 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* drivers/iio/light/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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#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/irq.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/pm.h>
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#include <linux/err.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/iio/events.h>
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#include <linux/platform_data/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_DISABLED 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 const 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 delayed_work poweroff_work;
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/* Remember state for suspend and resume functions */
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bool suspended;
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struct tsl2563_gainlevel_coeff const *gainlevel;
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u16 low_thres;
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u16 high_thres;
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u8 intr;
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bool int_enabled;
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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_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 i2c_smbus_write_byte_data(client,
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TSL2563_CMD | 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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ret = i2c_smbus_read_byte_data(client, TSL2563_CMD | TSL2563_REG_CTRL);
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if (ret < 0)
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return ret;
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return (ret & 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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int ret;
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ret = i2c_smbus_write_byte_data(chip->client,
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TSL2563_CMD | TSL2563_REG_TIMING,
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chip->gainlevel->gaintime);
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if (ret)
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goto error_ret;
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ret = i2c_smbus_write_byte_data(chip->client,
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TSL2563_CMD | TSL2563_REG_HIGHLOW,
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chip->high_thres & 0xFF);
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if (ret)
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goto error_ret;
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ret = i2c_smbus_write_byte_data(chip->client,
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TSL2563_CMD | TSL2563_REG_HIGHHIGH,
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(chip->high_thres >> 8) & 0xFF);
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if (ret)
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goto error_ret;
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ret = i2c_smbus_write_byte_data(chip->client,
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TSL2563_CMD | TSL2563_REG_LOWLOW,
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chip->low_thres & 0xFF);
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if (ret)
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goto error_ret;
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ret = i2c_smbus_write_byte_data(chip->client,
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TSL2563_CMD | TSL2563_REG_LOWHIGH,
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(chip->low_thres >> 8) & 0xFF);
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/*
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* Interrupt register is automatically written anyway if it is relevant
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* so is not here.
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*/
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error_ret:
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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 = i2c_smbus_read_byte_data(client, TSL2563_CMD | TSL2563_REG_ID);
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if (ret < 0)
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return ret;
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*id = 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 tsl2563_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 tsl2563_normalize_adc(u16 adc, u8 timing)
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{
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return adc << tsl2563_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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i2c_smbus_write_byte_data(client,
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TSL2563_CMD | 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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u16 adc0, adc1;
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int retry = 1;
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int ret = 0;
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if (chip->suspended)
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goto out;
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if (!chip->int_enabled) {
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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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}
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while (retry) {
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ret = i2c_smbus_read_word_data(client,
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TSL2563_CMD | TSL2563_REG_DATA0LOW);
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if (ret < 0)
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goto out;
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adc0 = ret;
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ret = i2c_smbus_read_word_data(client,
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TSL2563_CMD | TSL2563_REG_DATA1LOW);
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if (ret < 0)
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goto out;
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adc1 = ret;
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retry = tsl2563_adjust_gainlevel(chip, adc0);
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}
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chip->data0 = tsl2563_normalize_adc(adc0, chip->gainlevel->gaintime);
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chip->data1 = tsl2563_normalize_adc(adc1, chip->gainlevel->gaintime);
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if (!chip->int_enabled)
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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 tsl2563_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 tsl2563_calib_from_sysfs(int value)
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{
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return (((u32) value) << CALIB_FRAC_BITS) / CALIB_BASE_SYSFS;
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}
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/*
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* Conversions between lux and ADC values.
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*
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* The basic formula is lux = c0 * adc0 - c1 * adc1, where c0 and c1 are
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* appropriate constants. Different constants are needed for different
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* kinds of light, determined by the ratio adc1/adc0 (basically the ratio
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* of the intensities in infrared and visible wavelengths). lux_table below
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* lists the upper threshold of the adc1/adc0 ratio and the corresponding
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* constants.
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*/
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struct tsl2563_lux_coeff {
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unsigned long ch_ratio;
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unsigned long ch0_coeff;
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unsigned long ch1_coeff;
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};
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static const struct tsl2563_lux_coeff lux_table[] = {
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{
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.ch_ratio = FRAC10K(1300),
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.ch0_coeff = FRAC10K(315),
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.ch1_coeff = FRAC10K(262),
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}, {
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.ch_ratio = FRAC10K(2600),
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.ch0_coeff = FRAC10K(337),
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.ch1_coeff = FRAC10K(430),
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}, {
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.ch_ratio = FRAC10K(3900),
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.ch0_coeff = FRAC10K(363),
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.ch1_coeff = FRAC10K(529),
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}, {
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.ch_ratio = FRAC10K(5200),
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.ch0_coeff = FRAC10K(392),
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.ch1_coeff = FRAC10K(605),
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}, {
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.ch_ratio = FRAC10K(6500),
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.ch0_coeff = FRAC10K(229),
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.ch1_coeff = FRAC10K(291),
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}, {
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.ch_ratio = FRAC10K(8000),
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.ch0_coeff = FRAC10K(157),
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.ch1_coeff = FRAC10K(180),
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}, {
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.ch_ratio = FRAC10K(13000),
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.ch0_coeff = FRAC10K(34),
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.ch1_coeff = FRAC10K(26),
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}, {
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.ch_ratio = ULONG_MAX,
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.ch0_coeff = 0,
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.ch1_coeff = 0,
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},
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};
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/* Convert normalized, scaled ADC values to lux. */
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static unsigned int tsl2563_adc_to_lux(u32 adc0, u32 adc1)
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{
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const struct tsl2563_lux_coeff *lp = lux_table;
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unsigned long ratio, lux, ch0 = adc0, ch1 = adc1;
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ratio = ch0 ? ((ch1 << ADC_FRAC_BITS) / ch0) : ULONG_MAX;
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while (lp->ch_ratio < ratio)
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lp++;
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lux = ch0 * lp->ch0_coeff - ch1 * lp->ch1_coeff;
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return (unsigned int) (lux >> ADC_FRAC_BITS);
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}
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/* Apply calibration coefficient to ADC count. */
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static u32 tsl2563_calib_adc(u32 adc, u32 calib)
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{
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unsigned long scaled = adc;
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scaled *= calib;
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scaled >>= CALIB_FRAC_BITS;
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return (u32) scaled;
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}
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static int tsl2563_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 tsl2563_chip *chip = iio_priv(indio_dev);
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if (mask != IIO_CHAN_INFO_CALIBSCALE)
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return -EINVAL;
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if (chan->channel2 == IIO_MOD_LIGHT_BOTH)
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chip->calib0 = tsl2563_calib_from_sysfs(val);
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else if (chan->channel2 == IIO_MOD_LIGHT_IR)
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chip->calib1 = tsl2563_calib_from_sysfs(val);
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else
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return -EINVAL;
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return 0;
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}
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static int tsl2563_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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u32 calib0, calib1;
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struct tsl2563_chip *chip = iio_priv(indio_dev);
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mutex_lock(&chip->lock);
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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 = tsl2563_get_adc(chip);
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if (ret)
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goto error_ret;
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calib0 = tsl2563_calib_adc(chip->data0, chip->calib0) *
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chip->cover_comp_gain;
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calib1 = tsl2563_calib_adc(chip->data1, chip->calib1) *
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chip->cover_comp_gain;
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*val = tsl2563_adc_to_lux(calib0, calib1);
|
|
ret = IIO_VAL_INT;
|
|
break;
|
|
case IIO_INTENSITY:
|
|
ret = tsl2563_get_adc(chip);
|
|
if (ret)
|
|
goto error_ret;
|
|
if (chan->channel2 == IIO_MOD_LIGHT_BOTH)
|
|
*val = chip->data0;
|
|
else
|
|
*val = chip->data1;
|
|
ret = IIO_VAL_INT;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case IIO_CHAN_INFO_CALIBSCALE:
|
|
if (chan->channel2 == IIO_MOD_LIGHT_BOTH)
|
|
*val = tsl2563_calib_to_sysfs(chip->calib0);
|
|
else
|
|
*val = tsl2563_calib_to_sysfs(chip->calib1);
|
|
ret = IIO_VAL_INT;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
goto error_ret;
|
|
}
|
|
|
|
error_ret:
|
|
mutex_unlock(&chip->lock);
|
|
return ret;
|
|
}
|
|
|
|
static const struct iio_event_spec tsl2563_events[] = {
|
|
{
|
|
.type = IIO_EV_TYPE_THRESH,
|
|
.dir = IIO_EV_DIR_RISING,
|
|
.mask_separate = BIT(IIO_EV_INFO_VALUE) |
|
|
BIT(IIO_EV_INFO_ENABLE),
|
|
}, {
|
|
.type = IIO_EV_TYPE_THRESH,
|
|
.dir = IIO_EV_DIR_FALLING,
|
|
.mask_separate = BIT(IIO_EV_INFO_VALUE) |
|
|
BIT(IIO_EV_INFO_ENABLE),
|
|
},
|
|
};
|
|
|
|
static const struct iio_chan_spec tsl2563_channels[] = {
|
|
{
|
|
.type = IIO_LIGHT,
|
|
.indexed = 1,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
|
|
.channel = 0,
|
|
}, {
|
|
.type = IIO_INTENSITY,
|
|
.modified = 1,
|
|
.channel2 = IIO_MOD_LIGHT_BOTH,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
|
|
BIT(IIO_CHAN_INFO_CALIBSCALE),
|
|
.event_spec = tsl2563_events,
|
|
.num_event_specs = ARRAY_SIZE(tsl2563_events),
|
|
}, {
|
|
.type = IIO_INTENSITY,
|
|
.modified = 1,
|
|
.channel2 = IIO_MOD_LIGHT_IR,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
|
|
BIT(IIO_CHAN_INFO_CALIBSCALE),
|
|
}
|
|
};
|
|
|
|
static int tsl2563_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 tsl2563_chip *chip = iio_priv(indio_dev);
|
|
|
|
switch (dir) {
|
|
case IIO_EV_DIR_RISING:
|
|
*val = chip->high_thres;
|
|
break;
|
|
case IIO_EV_DIR_FALLING:
|
|
*val = chip->low_thres;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return IIO_VAL_INT;
|
|
}
|
|
|
|
static int tsl2563_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 tsl2563_chip *chip = iio_priv(indio_dev);
|
|
int ret;
|
|
u8 address;
|
|
|
|
if (dir == IIO_EV_DIR_RISING)
|
|
address = TSL2563_REG_HIGHLOW;
|
|
else
|
|
address = TSL2563_REG_LOWLOW;
|
|
mutex_lock(&chip->lock);
|
|
ret = i2c_smbus_write_byte_data(chip->client, TSL2563_CMD | address,
|
|
val & 0xFF);
|
|
if (ret)
|
|
goto error_ret;
|
|
ret = i2c_smbus_write_byte_data(chip->client,
|
|
TSL2563_CMD | (address + 1),
|
|
(val >> 8) & 0xFF);
|
|
if (dir == IIO_EV_DIR_RISING)
|
|
chip->high_thres = val;
|
|
else
|
|
chip->low_thres = val;
|
|
|
|
error_ret:
|
|
mutex_unlock(&chip->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static irqreturn_t tsl2563_event_handler(int irq, void *private)
|
|
{
|
|
struct iio_dev *dev_info = private;
|
|
struct tsl2563_chip *chip = iio_priv(dev_info);
|
|
|
|
iio_push_event(dev_info,
|
|
IIO_UNMOD_EVENT_CODE(IIO_INTENSITY,
|
|
0,
|
|
IIO_EV_TYPE_THRESH,
|
|
IIO_EV_DIR_EITHER),
|
|
iio_get_time_ns(dev_info));
|
|
|
|
/* clear the interrupt and push the event */
|
|
i2c_smbus_write_byte(chip->client, TSL2563_CMD | TSL2563_CLEARINT);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int tsl2563_write_interrupt_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 tsl2563_chip *chip = iio_priv(indio_dev);
|
|
int ret = 0;
|
|
|
|
mutex_lock(&chip->lock);
|
|
if (state && !(chip->intr & 0x30)) {
|
|
chip->intr &= ~0x30;
|
|
chip->intr |= 0x10;
|
|
/* ensure the chip is actually on */
|
|
cancel_delayed_work(&chip->poweroff_work);
|
|
if (!tsl2563_get_power(chip)) {
|
|
ret = tsl2563_set_power(chip, 1);
|
|
if (ret)
|
|
goto out;
|
|
ret = tsl2563_configure(chip);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
ret = i2c_smbus_write_byte_data(chip->client,
|
|
TSL2563_CMD | TSL2563_REG_INT,
|
|
chip->intr);
|
|
chip->int_enabled = true;
|
|
}
|
|
|
|
if (!state && (chip->intr & 0x30)) {
|
|
chip->intr &= ~0x30;
|
|
ret = i2c_smbus_write_byte_data(chip->client,
|
|
TSL2563_CMD | TSL2563_REG_INT,
|
|
chip->intr);
|
|
chip->int_enabled = false;
|
|
/* now the interrupt is not enabled, we can go to sleep */
|
|
schedule_delayed_work(&chip->poweroff_work, 5 * HZ);
|
|
}
|
|
out:
|
|
mutex_unlock(&chip->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int tsl2563_read_interrupt_config(struct iio_dev *indio_dev,
|
|
const struct iio_chan_spec *chan, enum iio_event_type type,
|
|
enum iio_event_direction dir)
|
|
{
|
|
struct tsl2563_chip *chip = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
mutex_lock(&chip->lock);
|
|
ret = i2c_smbus_read_byte_data(chip->client,
|
|
TSL2563_CMD | TSL2563_REG_INT);
|
|
mutex_unlock(&chip->lock);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return !!(ret & 0x30);
|
|
}
|
|
|
|
static const struct iio_info tsl2563_info_no_irq = {
|
|
.read_raw = &tsl2563_read_raw,
|
|
.write_raw = &tsl2563_write_raw,
|
|
};
|
|
|
|
static const struct iio_info tsl2563_info = {
|
|
.read_raw = &tsl2563_read_raw,
|
|
.write_raw = &tsl2563_write_raw,
|
|
.read_event_value = &tsl2563_read_thresh,
|
|
.write_event_value = &tsl2563_write_thresh,
|
|
.read_event_config = &tsl2563_read_interrupt_config,
|
|
.write_event_config = &tsl2563_write_interrupt_config,
|
|
};
|
|
|
|
static int tsl2563_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *device_id)
|
|
{
|
|
struct iio_dev *indio_dev;
|
|
struct tsl2563_chip *chip;
|
|
struct tsl2563_platform_data *pdata = client->dev.platform_data;
|
|
struct device_node *np = client->dev.of_node;
|
|
int err = 0;
|
|
u8 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);
|
|
chip->client = client;
|
|
|
|
err = tsl2563_detect(chip);
|
|
if (err) {
|
|
dev_err(&client->dev, "detect error %d\n", -err);
|
|
return err;
|
|
}
|
|
|
|
err = tsl2563_read_id(chip, &id);
|
|
if (err) {
|
|
dev_err(&client->dev, "read id error %d\n", -err);
|
|
return err;
|
|
}
|
|
|
|
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 = tsl2563_calib_from_sysfs(CALIB_BASE_SYSFS);
|
|
chip->calib1 = tsl2563_calib_from_sysfs(CALIB_BASE_SYSFS);
|
|
|
|
if (pdata)
|
|
chip->cover_comp_gain = pdata->cover_comp_gain;
|
|
else if (np)
|
|
of_property_read_u32(np, "amstaos,cover-comp-gain",
|
|
&chip->cover_comp_gain);
|
|
else
|
|
chip->cover_comp_gain = 1;
|
|
|
|
dev_info(&client->dev, "model %d, rev. %d\n", id >> 4, id & 0x0f);
|
|
indio_dev->name = client->name;
|
|
indio_dev->channels = tsl2563_channels;
|
|
indio_dev->num_channels = ARRAY_SIZE(tsl2563_channels);
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
|
|
if (client->irq)
|
|
indio_dev->info = &tsl2563_info;
|
|
else
|
|
indio_dev->info = &tsl2563_info_no_irq;
|
|
|
|
if (client->irq) {
|
|
err = devm_request_threaded_irq(&client->dev, client->irq,
|
|
NULL,
|
|
&tsl2563_event_handler,
|
|
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
|
|
"tsl2563_event",
|
|
indio_dev);
|
|
if (err) {
|
|
dev_err(&client->dev, "irq request error %d\n", -err);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
err = tsl2563_configure(chip);
|
|
if (err) {
|
|
dev_err(&client->dev, "configure error %d\n", -err);
|
|
return err;
|
|
}
|
|
|
|
INIT_DELAYED_WORK(&chip->poweroff_work, tsl2563_poweroff_work);
|
|
|
|
/* The interrupt cannot yet be enabled so this is fine without lock */
|
|
schedule_delayed_work(&chip->poweroff_work, 5 * HZ);
|
|
|
|
err = iio_device_register(indio_dev);
|
|
if (err) {
|
|
dev_err(&client->dev, "iio registration error %d\n", -err);
|
|
goto fail;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
cancel_delayed_work_sync(&chip->poweroff_work);
|
|
return err;
|
|
}
|
|
|
|
static int tsl2563_remove(struct i2c_client *client)
|
|
{
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(client);
|
|
struct tsl2563_chip *chip = iio_priv(indio_dev);
|
|
|
|
iio_device_unregister(indio_dev);
|
|
if (!chip->int_enabled)
|
|
cancel_delayed_work(&chip->poweroff_work);
|
|
/* Ensure that interrupts are disabled - then flush any bottom halves */
|
|
chip->intr &= ~0x30;
|
|
i2c_smbus_write_byte_data(chip->client, TSL2563_CMD | TSL2563_REG_INT,
|
|
chip->intr);
|
|
flush_scheduled_work();
|
|
tsl2563_set_power(chip, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int tsl2563_suspend(struct device *dev)
|
|
{
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct tsl2563_chip *chip = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
mutex_lock(&chip->lock);
|
|
|
|
ret = tsl2563_set_power(chip, 0);
|
|
if (ret)
|
|
goto out;
|
|
|
|
chip->suspended = true;
|
|
|
|
out:
|
|
mutex_unlock(&chip->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int tsl2563_resume(struct device *dev)
|
|
{
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct tsl2563_chip *chip = iio_priv(indio_dev);
|
|
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->suspended = false;
|
|
|
|
out:
|
|
mutex_unlock(&chip->lock);
|
|
return ret;
|
|
}
|
|
|
|
static SIMPLE_DEV_PM_OPS(tsl2563_pm_ops, tsl2563_suspend, tsl2563_resume);
|
|
#define TSL2563_PM_OPS (&tsl2563_pm_ops)
|
|
#else
|
|
#define TSL2563_PM_OPS NULL
|
|
#endif
|
|
|
|
static const struct i2c_device_id tsl2563_id[] = {
|
|
{ "tsl2560", 0 },
|
|
{ "tsl2561", 1 },
|
|
{ "tsl2562", 2 },
|
|
{ "tsl2563", 3 },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, tsl2563_id);
|
|
|
|
static const struct of_device_id tsl2563_of_match[] = {
|
|
{ .compatible = "amstaos,tsl2560" },
|
|
{ .compatible = "amstaos,tsl2561" },
|
|
{ .compatible = "amstaos,tsl2562" },
|
|
{ .compatible = "amstaos,tsl2563" },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, tsl2563_of_match);
|
|
|
|
static struct i2c_driver tsl2563_i2c_driver = {
|
|
.driver = {
|
|
.name = "tsl2563",
|
|
.of_match_table = tsl2563_of_match,
|
|
.pm = TSL2563_PM_OPS,
|
|
},
|
|
.probe = tsl2563_probe,
|
|
.remove = tsl2563_remove,
|
|
.id_table = tsl2563_id,
|
|
};
|
|
module_i2c_driver(tsl2563_i2c_driver);
|
|
|
|
MODULE_AUTHOR("Nokia Corporation");
|
|
MODULE_DESCRIPTION("tsl2563 light sensor driver");
|
|
MODULE_LICENSE("GPL");
|