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linux/drivers/iio/light/gp2ap002.c
Julien Stephan b4b42f28a0 iio: fix write_event_config signature 
write_event_config callback use an int for state, but it is actually a
boolean. iio_ev_state_store is actually using kstrtobool to check user
input, then gives the converted boolean value to write_event_config.

Fix signature and update all iio drivers to use the new signature.

This patch has been partially written using coccinelle with the
following script:

$ cat iio-bool.cocci
// Options: --all-includes

virtual patch

@c1@
identifier iioinfo;
identifier wecfunc;
@@
 static const struct iio_info iioinfo = {
        ...,
        .write_event_config =
(
 wecfunc
|
 &wecfunc
),
        ...,
 };

@@
identifier c1.wecfunc;
identifier indio_dev, chan, type, dir, state;
@@
 int wecfunc(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir,
-int
+bool
 state) {
  ...
 }

make coccicheck MODE=patch COCCI=iio-bool.cocci M=drivers/iio

Unfortunately, this script didn't match all files:
* all write_event_config callbacks using iio_device_claim_direct_scoped
  were not detected and not patched.
* all files that do not assign and declare the write_event_config
  callback in the same file.

iio.h was also manually updated.

The patch was build tested using allmodconfig config.

cc: Julia Lawall <julia.lawall@inria.fr>
Signed-off-by: Julien Stephan <jstephan@baylibre.com>
Link: https://patch.msgid.link/20241031-iio-fix-write-event-config-signature-v2-7-2bcacbb517a2@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2024-11-03 20:33:44 +00:00

722 lines
20 KiB
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// SPDX-License-Identifier: GPL-2.0-only
/*
* These are the two Sharp GP2AP002 variants supported by this driver:
* GP2AP002A00F Ambient Light and Proximity Sensor
* GP2AP002S00F Proximity Sensor
*
* Copyright (C) 2020 Linaro Ltd.
* Author: Linus Walleij <linus.walleij@linaro.org>
*
* Based partly on the code in Sony Ericssons GP2AP00200F driver by
* Courtney Cavin and Oskar Andero in drivers/input/misc/gp2ap002a00f.c
* Based partly on a Samsung misc driver submitted by
* Donggeun Kim & Minkyu Kang in 2011:
* https://lore.kernel.org/lkml/1315556546-7445-1-git-send-email-dg77.kim@samsung.com/
* Based partly on a submission by
* Jonathan Bakker and Paweł Chmiel in january 2019:
* https://lore.kernel.org/linux-input/20190125175045.22576-1-pawel.mikolaj.chmiel@gmail.com/
* Based partly on code from the Samsung GT-S7710 by <mjchen@sta.samsung.com>
* Based partly on the code in LG Electronics GP2AP00200F driver by
* Kenobi Lee <sungyoung.lee@lge.com> and EunYoung Cho <ey.cho@lge.com>
*/
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/events.h>
#include <linux/iio/consumer.h> /* To get our ADC channel */
#include <linux/iio/types.h> /* To deal with our ADC channel */
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/regulator/consumer.h>
#include <linux/pm_runtime.h>
#include <linux/interrupt.h>
#include <linux/bits.h>
#include <linux/math64.h>
#include <linux/pm.h>
#define GP2AP002_PROX_CHANNEL 0
#define GP2AP002_ALS_CHANNEL 1
/* ------------------------------------------------------------------------ */
/* ADDRESS SYMBOL DATA Init R/W */
/* D7 D6 D5 D4 D3 D2 D1 D0 */
/* ------------------------------------------------------------------------ */
/* 0 PROX X X X X X X X VO H'00 R */
/* 1 GAIN X X X X LED0 X X X H'00 W */
/* 2 HYS HYSD HYSC1 HYSC0 X HYSF3 HYSF2 HYSF1 HYSF0 H'00 W */
/* 3 CYCLE X X CYCL2 CYCL1 CYCL0 OSC2 X X H'00 W */
/* 4 OPMOD X X X ASD X X VCON SSD H'00 W */
/* 6 CON X X X OCON1 OCON0 X X X H'00 W */
/* ------------------------------------------------------------------------ */
/* VO :Proximity sensing result(0: no detection, 1: detection) */
/* LED0 :Select switch for LED driver's On-registence(0:2x higher, 1:normal)*/
/* HYSD/HYSF :Adjusts the receiver sensitivity */
/* OSC :Select switch internal clocl frequency hoppling(0:effective) */
/* CYCL :Determine the detection cycle(typically 8ms, up to 128x) */
/* SSD :Software Shutdown function(0:shutdown, 1:operating) */
/* VCON :VOUT output method control(0:normal, 1:interrupt) */
/* ASD :Select switch for analog sleep function(0:ineffective, 1:effective)*/
/* OCON :Select switch for enabling/disabling VOUT (00:enable, 11:disable) */
#define GP2AP002_PROX 0x00
#define GP2AP002_GAIN 0x01
#define GP2AP002_HYS 0x02
#define GP2AP002_CYCLE 0x03
#define GP2AP002_OPMOD 0x04
#define GP2AP002_CON 0x06
#define GP2AP002_PROX_VO_DETECT BIT(0)
/* Setting this bit to 0 means 2x higher LED resistance */
#define GP2AP002_GAIN_LED_NORMAL BIT(3)
/*
* These bits adjusts the proximity sensitivity, determining characteristics
* of the detection distance and its hysteresis.
*/
#define GP2AP002_HYS_HYSD_SHIFT 7
#define GP2AP002_HYS_HYSD_MASK BIT(7)
#define GP2AP002_HYS_HYSC_SHIFT 5
#define GP2AP002_HYS_HYSC_MASK GENMASK(6, 5)
#define GP2AP002_HYS_HYSF_SHIFT 0
#define GP2AP002_HYS_HYSF_MASK GENMASK(3, 0)
#define GP2AP002_HYS_MASK (GP2AP002_HYS_HYSD_MASK | \
GP2AP002_HYS_HYSC_MASK | \
GP2AP002_HYS_HYSF_MASK)
/*
* These values determine the detection cycle response time
* 0: 8ms, 1: 16ms, 2: 32ms, 3: 64ms, 4: 128ms,
* 5: 256ms, 6: 512ms, 7: 1024ms
*/
#define GP2AP002_CYCLE_CYCL_SHIFT 3
#define GP2AP002_CYCLE_CYCL_MASK GENMASK(5, 3)
/*
* Select switch for internal clock frequency hopping
* 0: effective,
* 1: ineffective
*/
#define GP2AP002_CYCLE_OSC_EFFECTIVE 0
#define GP2AP002_CYCLE_OSC_INEFFECTIVE BIT(2)
#define GP2AP002_CYCLE_OSC_MASK BIT(2)
/* Analog sleep effective */
#define GP2AP002_OPMOD_ASD BIT(4)
/* Enable chip */
#define GP2AP002_OPMOD_SSD_OPERATING BIT(0)
/* IRQ mode */
#define GP2AP002_OPMOD_VCON_IRQ BIT(1)
#define GP2AP002_OPMOD_MASK (BIT(0) | BIT(1) | BIT(4))
/*
* Select switch for enabling/disabling Vout pin
* 0: enable
* 2: force to go Low
* 3: force to go High
*/
#define GP2AP002_CON_OCON_SHIFT 3
#define GP2AP002_CON_OCON_ENABLE (0x0 << GP2AP002_CON_OCON_SHIFT)
#define GP2AP002_CON_OCON_LOW (0x2 << GP2AP002_CON_OCON_SHIFT)
#define GP2AP002_CON_OCON_HIGH (0x3 << GP2AP002_CON_OCON_SHIFT)
#define GP2AP002_CON_OCON_MASK (0x3 << GP2AP002_CON_OCON_SHIFT)
/**
* struct gp2ap002 - GP2AP002 state
* @map: regmap pointer for the i2c regmap
* @dev: pointer to parent device
* @vdd: regulator controlling VDD
* @vio: regulator controlling VIO
* @alsout: IIO ADC channel to convert the ALSOUT signal
* @hys_far: hysteresis control from device tree
* @hys_close: hysteresis control from device tree
* @is_gp2ap002s00f: this is the GP2AP002F variant of the chip
* @irq: the IRQ line used by this device
* @enabled: we cannot read the status of the hardware so we need to
* keep track of whether the event is enabled using this state variable
*/
struct gp2ap002 {
struct regmap *map;
struct device *dev;
struct regulator *vdd;
struct regulator *vio;
struct iio_channel *alsout;
u8 hys_far;
u8 hys_close;
bool is_gp2ap002s00f;
int irq;
bool enabled;
};
static irqreturn_t gp2ap002_prox_irq(int irq, void *d)
{
struct iio_dev *indio_dev = d;
struct gp2ap002 *gp2ap002 = iio_priv(indio_dev);
u64 ev;
int val;
int ret;
if (!gp2ap002->enabled)
goto err_retrig;
ret = regmap_read(gp2ap002->map, GP2AP002_PROX, &val);
if (ret) {
dev_err(gp2ap002->dev, "error reading proximity\n");
goto err_retrig;
}
if (val & GP2AP002_PROX_VO_DETECT) {
/* Close */
dev_dbg(gp2ap002->dev, "close\n");
ret = regmap_write(gp2ap002->map, GP2AP002_HYS,
gp2ap002->hys_far);
if (ret)
dev_err(gp2ap002->dev,
"error setting up proximity hysteresis\n");
ev = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, GP2AP002_PROX_CHANNEL,
IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING);
} else {
/* Far */
dev_dbg(gp2ap002->dev, "far\n");
ret = regmap_write(gp2ap002->map, GP2AP002_HYS,
gp2ap002->hys_close);
if (ret)
dev_err(gp2ap002->dev,
"error setting up proximity hysteresis\n");
ev = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, GP2AP002_PROX_CHANNEL,
IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING);
}
iio_push_event(indio_dev, ev, iio_get_time_ns(indio_dev));
/*
* After changing hysteresis, we need to wait for one detection
* cycle to see if anything changed, or we will just trigger the
* previous interrupt again. A detection cycle depends on the CYCLE
* register, we are hard-coding ~8 ms in probe() so wait some more
* than this, 20-30 ms.
*/
usleep_range(20000, 30000);
err_retrig:
ret = regmap_write(gp2ap002->map, GP2AP002_CON,
GP2AP002_CON_OCON_ENABLE);
if (ret)
dev_err(gp2ap002->dev, "error setting up VOUT control\n");
return IRQ_HANDLED;
}
/*
* This array maps current and lux.
*
* Ambient light sensing range is 3 to 55000 lux.
*
* This mapping is based on the following formula.
* illuminance = 10 ^ (current[mA] / 10)
*
* When the ADC measures 0, return 0 lux.
*/
static const u16 gp2ap002_illuminance_table[] = {
0, 1, 1, 2, 2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 25, 32, 40, 50, 63, 79,
100, 126, 158, 200, 251, 316, 398, 501, 631, 794, 1000, 1259, 1585,
1995, 2512, 3162, 3981, 5012, 6310, 7943, 10000, 12589, 15849, 19953,
25119, 31623, 39811, 50119,
};
static int gp2ap002_get_lux(struct gp2ap002 *gp2ap002)
{
int ret, res;
u16 lux;
ret = iio_read_channel_processed(gp2ap002->alsout, &res);
if (ret < 0)
return ret;
dev_dbg(gp2ap002->dev, "read %d mA from ADC\n", res);
/* ensure we don't under/overflow */
res = clamp(res, 0, (int)ARRAY_SIZE(gp2ap002_illuminance_table) - 1);
lux = gp2ap002_illuminance_table[res];
return (int)lux;
}
static int gp2ap002_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val, int *val2, long mask)
{
struct gp2ap002 *gp2ap002 = iio_priv(indio_dev);
int ret;
pm_runtime_get_sync(gp2ap002->dev);
switch (mask) {
case IIO_CHAN_INFO_RAW:
switch (chan->type) {
case IIO_LIGHT:
ret = gp2ap002_get_lux(gp2ap002);
if (ret < 0)
return ret;
*val = ret;
ret = IIO_VAL_INT;
goto out;
default:
ret = -EINVAL;
goto out;
}
default:
ret = -EINVAL;
}
out:
pm_runtime_mark_last_busy(gp2ap002->dev);
pm_runtime_put_autosuspend(gp2ap002->dev);
return ret;
}
static int gp2ap002_init(struct gp2ap002 *gp2ap002)
{
int ret;
/* Set up the IR LED resistance */
ret = regmap_write(gp2ap002->map, GP2AP002_GAIN,
GP2AP002_GAIN_LED_NORMAL);
if (ret) {
dev_err(gp2ap002->dev, "error setting up LED gain\n");
return ret;
}
ret = regmap_write(gp2ap002->map, GP2AP002_HYS, gp2ap002->hys_far);
if (ret) {
dev_err(gp2ap002->dev,
"error setting up proximity hysteresis\n");
return ret;
}
/* Disable internal frequency hopping */
ret = regmap_write(gp2ap002->map, GP2AP002_CYCLE,
GP2AP002_CYCLE_OSC_INEFFECTIVE);
if (ret) {
dev_err(gp2ap002->dev,
"error setting up internal frequency hopping\n");
return ret;
}
/* Enable chip and IRQ, disable analog sleep */
ret = regmap_write(gp2ap002->map, GP2AP002_OPMOD,
GP2AP002_OPMOD_SSD_OPERATING |
GP2AP002_OPMOD_VCON_IRQ);
if (ret) {
dev_err(gp2ap002->dev, "error setting up operation mode\n");
return ret;
}
/* Interrupt on VOUT enabled */
ret = regmap_write(gp2ap002->map, GP2AP002_CON,
GP2AP002_CON_OCON_ENABLE);
if (ret)
dev_err(gp2ap002->dev, "error setting up VOUT control\n");
return ret;
}
static int gp2ap002_read_event_config(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan,
enum iio_event_type type,
enum iio_event_direction dir)
{
struct gp2ap002 *gp2ap002 = iio_priv(indio_dev);
/*
* We just keep track of this internally, as it is not possible to
* query the hardware.
*/
return gp2ap002->enabled;
}
static int gp2ap002_write_event_config(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan,
enum iio_event_type type,
enum iio_event_direction dir,
bool state)
{
struct gp2ap002 *gp2ap002 = iio_priv(indio_dev);
if (state) {
/*
* This will bring the regulators up (unless they are on
* already) and reintialize the sensor by using runtime_pm
* callbacks.
*/
pm_runtime_get_sync(gp2ap002->dev);
gp2ap002->enabled = true;
} else {
pm_runtime_mark_last_busy(gp2ap002->dev);
pm_runtime_put_autosuspend(gp2ap002->dev);
gp2ap002->enabled = false;
}
return 0;
}
static const struct iio_info gp2ap002_info = {
.read_raw = gp2ap002_read_raw,
.read_event_config = gp2ap002_read_event_config,
.write_event_config = gp2ap002_write_event_config,
};
static const struct iio_event_spec gp2ap002_events[] = {
{
.type = IIO_EV_TYPE_THRESH,
.dir = IIO_EV_DIR_EITHER,
.mask_separate = BIT(IIO_EV_INFO_ENABLE),
},
};
static const struct iio_chan_spec gp2ap002_channels[] = {
{
.type = IIO_PROXIMITY,
.event_spec = gp2ap002_events,
.num_event_specs = ARRAY_SIZE(gp2ap002_events),
},
{
.type = IIO_LIGHT,
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
.channel = GP2AP002_ALS_CHANNEL,
},
};
/*
* We need a special regmap because this hardware expects to
* write single bytes to registers but read a 16bit word on some
* variants and discard the lower 8 bits so combine
* i2c_smbus_read_word_data() with i2c_smbus_write_byte_data()
* selectively like this.
*/
static int gp2ap002_regmap_i2c_read(void *context, unsigned int reg,
unsigned int *val)
{
struct device *dev = context;
struct i2c_client *i2c = to_i2c_client(dev);
int ret;
ret = i2c_smbus_read_word_data(i2c, reg);
if (ret < 0)
return ret;
*val = (ret >> 8) & 0xFF;
return 0;
}
static int gp2ap002_regmap_i2c_write(void *context, unsigned int reg,
unsigned int val)
{
struct device *dev = context;
struct i2c_client *i2c = to_i2c_client(dev);
return i2c_smbus_write_byte_data(i2c, reg, val);
}
static const struct regmap_bus gp2ap002_regmap_bus = {
.reg_read = gp2ap002_regmap_i2c_read,
.reg_write = gp2ap002_regmap_i2c_write,
};
static int gp2ap002_probe(struct i2c_client *client)
{
struct gp2ap002 *gp2ap002;
struct iio_dev *indio_dev;
struct device *dev = &client->dev;
enum iio_chan_type ch_type;
static const struct regmap_config config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = GP2AP002_CON,
};
struct regmap *regmap;
int num_chan;
const char *compat;
u8 val;
int ret;
indio_dev = devm_iio_device_alloc(dev, sizeof(*gp2ap002));
if (!indio_dev)
return -ENOMEM;
i2c_set_clientdata(client, indio_dev);
gp2ap002 = iio_priv(indio_dev);
gp2ap002->dev = dev;
/*
* Check the device compatible like this makes it possible to use
* ACPI PRP0001 for registering the sensor using device tree
* properties.
*/
ret = device_property_read_string(dev, "compatible", &compat);
if (ret) {
dev_err(dev, "cannot check compatible\n");
return ret;
}
gp2ap002->is_gp2ap002s00f = !strcmp(compat, "sharp,gp2ap002s00f");
regmap = devm_regmap_init(dev, &gp2ap002_regmap_bus, dev, &config);
if (IS_ERR(regmap)) {
dev_err(dev, "Failed to register i2c regmap %ld\n", PTR_ERR(regmap));
return PTR_ERR(regmap);
}
gp2ap002->map = regmap;
/*
* The hysteresis settings are coded into the device tree as values
* to be written into the hysteresis register. The datasheet defines
* modes "A", "B1" and "B2" with fixed values to be use but vendor
* code trees for actual devices are tweaking these values and refer to
* modes named things like "B1.5". To be able to support any devices,
* we allow passing an arbitrary hysteresis setting for "near" and
* "far".
*/
/* Check the device tree for the IR LED hysteresis */
ret = device_property_read_u8(dev, "sharp,proximity-far-hysteresis",
&val);
if (ret) {
dev_err(dev, "failed to obtain proximity far setting\n");
return ret;
}
dev_dbg(dev, "proximity far setting %02x\n", val);
gp2ap002->hys_far = val;
ret = device_property_read_u8(dev, "sharp,proximity-close-hysteresis",
&val);
if (ret) {
dev_err(dev, "failed to obtain proximity close setting\n");
return ret;
}
dev_dbg(dev, "proximity close setting %02x\n", val);
gp2ap002->hys_close = val;
/* The GP2AP002A00F has a light sensor too */
if (!gp2ap002->is_gp2ap002s00f) {
gp2ap002->alsout = devm_iio_channel_get(dev, "alsout");
if (IS_ERR(gp2ap002->alsout)) {
ret = PTR_ERR(gp2ap002->alsout);
ret = (ret == -ENODEV) ? -EPROBE_DEFER : ret;
return dev_err_probe(dev, ret, "failed to get ALSOUT ADC channel\n");
}
ret = iio_get_channel_type(gp2ap002->alsout, &ch_type);
if (ret < 0)
return ret;
if (ch_type != IIO_CURRENT) {
dev_err(dev,
"wrong type of IIO channel specified for ALSOUT\n");
return -EINVAL;
}
}
gp2ap002->vdd = devm_regulator_get(dev, "vdd");
if (IS_ERR(gp2ap002->vdd))
return dev_err_probe(dev, PTR_ERR(gp2ap002->vdd),
"failed to get VDD regulator\n");
gp2ap002->vio = devm_regulator_get(dev, "vio");
if (IS_ERR(gp2ap002->vio))
return dev_err_probe(dev, PTR_ERR(gp2ap002->vio),
"failed to get VIO regulator\n");
/* Operating voltage 2.4V .. 3.6V according to datasheet */
ret = regulator_set_voltage(gp2ap002->vdd, 2400000, 3600000);
if (ret) {
dev_err(dev, "failed to sett VDD voltage\n");
return ret;
}
/* VIO should be between 1.65V and VDD */
ret = regulator_get_voltage(gp2ap002->vdd);
if (ret < 0) {
dev_err(dev, "failed to get VDD voltage\n");
return ret;
}
ret = regulator_set_voltage(gp2ap002->vio, 1650000, ret);
if (ret) {
dev_err(dev, "failed to set VIO voltage\n");
return ret;
}
ret = regulator_enable(gp2ap002->vdd);
if (ret) {
dev_err(dev, "failed to enable VDD regulator\n");
return ret;
}
ret = regulator_enable(gp2ap002->vio);
if (ret) {
dev_err(dev, "failed to enable VIO regulator\n");
goto out_disable_vdd;
}
msleep(20);
/*
* Initialize the device and signal to runtime PM that now we are
* definitely up and using power.
*/
ret = gp2ap002_init(gp2ap002);
if (ret) {
dev_err(dev, "initialization failed\n");
goto out_disable_vio;
}
pm_runtime_get_noresume(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
gp2ap002->enabled = false;
ret = devm_request_threaded_irq(dev, client->irq, NULL,
gp2ap002_prox_irq, IRQF_ONESHOT,
"gp2ap002", indio_dev);
if (ret) {
dev_err(dev, "unable to request IRQ\n");
goto out_put_pm;
}
gp2ap002->irq = client->irq;
/*
* As the device takes 20 ms + regulator delay to come up with a fresh
* measurement after power-on, do not shut it down unnecessarily.
* Set autosuspend to a one second.
*/
pm_runtime_set_autosuspend_delay(dev, 1000);
pm_runtime_use_autosuspend(dev);
pm_runtime_put(dev);
indio_dev->info = &gp2ap002_info;
indio_dev->name = "gp2ap002";
indio_dev->channels = gp2ap002_channels;
/* Skip light channel for the proximity-only sensor */
num_chan = ARRAY_SIZE(gp2ap002_channels);
if (gp2ap002->is_gp2ap002s00f)
num_chan--;
indio_dev->num_channels = num_chan;
indio_dev->modes = INDIO_DIRECT_MODE;
ret = iio_device_register(indio_dev);
if (ret)
goto out_disable_pm;
dev_dbg(dev, "Sharp GP2AP002 probed successfully\n");
return 0;
out_put_pm:
pm_runtime_put_noidle(dev);
out_disable_pm:
pm_runtime_disable(dev);
out_disable_vio:
regulator_disable(gp2ap002->vio);
out_disable_vdd:
regulator_disable(gp2ap002->vdd);
return ret;
}
static void gp2ap002_remove(struct i2c_client *client)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
struct gp2ap002 *gp2ap002 = iio_priv(indio_dev);
struct device *dev = &client->dev;
pm_runtime_get_sync(dev);
pm_runtime_put_noidle(dev);
pm_runtime_disable(dev);
iio_device_unregister(indio_dev);
regulator_disable(gp2ap002->vio);
regulator_disable(gp2ap002->vdd);
}
static int gp2ap002_runtime_suspend(struct device *dev)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct gp2ap002 *gp2ap002 = iio_priv(indio_dev);
int ret;
/* Deactivate the IRQ */
disable_irq(gp2ap002->irq);
/* Disable chip and IRQ, everything off */
ret = regmap_write(gp2ap002->map, GP2AP002_OPMOD, 0x00);
if (ret) {
dev_err(gp2ap002->dev, "error setting up operation mode\n");
return ret;
}
/*
* As these regulators may be shared, at least we are now in
* sleep even if the regulators aren't really turned off.
*/
regulator_disable(gp2ap002->vio);
regulator_disable(gp2ap002->vdd);
return 0;
}
static int gp2ap002_runtime_resume(struct device *dev)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct gp2ap002 *gp2ap002 = iio_priv(indio_dev);
int ret;
ret = regulator_enable(gp2ap002->vdd);
if (ret) {
dev_err(dev, "failed to enable VDD regulator in resume path\n");
return ret;
}
ret = regulator_enable(gp2ap002->vio);
if (ret) {
dev_err(dev, "failed to enable VIO regulator in resume path\n");
return ret;
}
msleep(20);
ret = gp2ap002_init(gp2ap002);
if (ret) {
dev_err(dev, "re-initialization failed\n");
return ret;
}
/* Re-activate the IRQ */
enable_irq(gp2ap002->irq);
return 0;
}
static DEFINE_RUNTIME_DEV_PM_OPS(gp2ap002_dev_pm_ops, gp2ap002_runtime_suspend,
gp2ap002_runtime_resume, NULL);
static const struct i2c_device_id gp2ap002_id_table[] = {
{ "gp2ap002" },
{ }
};
MODULE_DEVICE_TABLE(i2c, gp2ap002_id_table);
static const struct of_device_id gp2ap002_of_match[] = {
{ .compatible = "sharp,gp2ap002a00f" },
{ .compatible = "sharp,gp2ap002s00f" },
{ },
};
MODULE_DEVICE_TABLE(of, gp2ap002_of_match);
static struct i2c_driver gp2ap002_driver = {
.driver = {
.name = "gp2ap002",
.of_match_table = gp2ap002_of_match,
.pm = pm_ptr(&gp2ap002_dev_pm_ops),
},
.probe = gp2ap002_probe,
.remove = gp2ap002_remove,
.id_table = gp2ap002_id_table,
};
module_i2c_driver(gp2ap002_driver);
MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
MODULE_DESCRIPTION("GP2AP002 ambient light and proximity sensor driver");
MODULE_LICENSE("GPL v2");
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