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-rw-r--r--drivers/iio/chemical/Kconfig27
-rw-r--r--drivers/iio/chemical/Makefile2
-rw-r--r--drivers/iio/chemical/atlas-sensor.c19
-rw-r--r--drivers/iio/chemical/bme680_i2c.c8
-rw-r--r--drivers/iio/chemical/bme680_spi.c8
-rw-r--r--drivers/iio/chemical/ccs811.c2
-rw-r--r--drivers/iio/chemical/scd30_core.c3
-rw-r--r--drivers/iio/chemical/sgp30.c2
-rw-r--r--drivers/iio/chemical/sps30.c275
-rw-r--r--drivers/iio/chemical/sps30.h35
-rw-r--r--drivers/iio/chemical/sps30_i2c.c258
-rw-r--r--drivers/iio/chemical/sps30_serial.c431
12 files changed, 810 insertions, 260 deletions
diff --git a/drivers/iio/chemical/Kconfig b/drivers/iio/chemical/Kconfig
index 10bb431bc3ce..a4920646e9be 100644
--- a/drivers/iio/chemical/Kconfig
+++ b/drivers/iio/chemical/Kconfig
@@ -132,17 +132,32 @@ config SENSIRION_SGP30
module will be called sgp30.
config SPS30
- tristate "SPS30 particulate matter sensor"
- depends on I2C
- select CRC8
+ tristate
select IIO_BUFFER
select IIO_TRIGGERED_BUFFER
+
+config SPS30_I2C
+ tristate "SPS30 particulate matter sensor I2C driver"
+ depends on I2C
+ select SPS30
+ select CRC8
help
- Say Y here to build support for the Sensirion SPS30 particulate
- matter sensor.
+ Say Y here to build support for the Sensirion SPS30 I2C interface
+ driver.
+
+ To compile this driver as a module, choose M here: the module will
+ be called sps30_i2c.
+
+config SPS30_SERIAL
+ tristate "SPS30 particulate matter sensor serial driver"
+ depends on SERIAL_DEV_BUS
+ select SPS30
+ help
+ Say Y here to build support for the Sensirion SPS30 serial interface
+ driver.
To compile this driver as a module, choose M here: the module will
- be called sps30.
+ be called sps30_serial.
config VZ89X
tristate "SGX Sensortech MiCS VZ89X VOC sensor"
diff --git a/drivers/iio/chemical/Makefile b/drivers/iio/chemical/Makefile
index fef63dd5bf92..4898690cc155 100644
--- a/drivers/iio/chemical/Makefile
+++ b/drivers/iio/chemical/Makefile
@@ -17,4 +17,6 @@ obj-$(CONFIG_SCD30_I2C) += scd30_i2c.o
obj-$(CONFIG_SCD30_SERIAL) += scd30_serial.o
obj-$(CONFIG_SENSIRION_SGP30) += sgp30.o
obj-$(CONFIG_SPS30) += sps30.o
+obj-$(CONFIG_SPS30_I2C) += sps30_i2c.o
+obj-$(CONFIG_SPS30_SERIAL) += sps30_serial.o
obj-$(CONFIG_VZ89X) += vz89x.o
diff --git a/drivers/iio/chemical/atlas-sensor.c b/drivers/iio/chemical/atlas-sensor.c
index 56ba6c82b501..9cb99585b6ff 100644
--- a/drivers/iio/chemical/atlas-sensor.c
+++ b/drivers/iio/chemical/atlas-sensor.c
@@ -91,8 +91,8 @@ struct atlas_data {
struct regmap *regmap;
struct irq_work work;
unsigned int interrupt_enabled;
-
- __be32 buffer[6]; /* 96-bit data + 32-bit pad + 64-bit timestamp */
+ /* 96-bit data + 32-bit pad + 64-bit timestamp */
+ __be32 buffer[6] __aligned(8);
};
static const struct regmap_config atlas_regmap_config = {
@@ -410,11 +410,9 @@ static int atlas_buffer_postenable(struct iio_dev *indio_dev)
struct atlas_data *data = iio_priv(indio_dev);
int ret;
- ret = pm_runtime_get_sync(&data->client->dev);
- if (ret < 0) {
- pm_runtime_put_noidle(&data->client->dev);
+ ret = pm_runtime_resume_and_get(&data->client->dev);
+ if (ret)
return ret;
- }
return atlas_set_interrupt(data, true);
}
@@ -487,11 +485,9 @@ static int atlas_read_measurement(struct atlas_data *data, int reg, __be32 *val)
int suspended = pm_runtime_suspended(dev);
int ret;
- ret = pm_runtime_get_sync(dev);
- if (ret < 0) {
- pm_runtime_put_noidle(dev);
+ ret = pm_runtime_resume_and_get(dev);
+ if (ret)
return ret;
- }
if (suspended)
msleep(data->chip->delay);
@@ -640,7 +636,7 @@ static int atlas_probe(struct i2c_client *client,
indio_dev->modes = INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE;
trig = devm_iio_trigger_alloc(&client->dev, "%s-dev%d",
- indio_dev->name, indio_dev->id);
+ indio_dev->name, iio_device_id(indio_dev));
if (!trig)
return -ENOMEM;
@@ -741,7 +737,6 @@ static int atlas_remove(struct i2c_client *client)
pm_runtime_disable(&client->dev);
pm_runtime_set_suspended(&client->dev);
- pm_runtime_put_noidle(&client->dev);
return atlas_set_powermode(data, 0);
}
diff --git a/drivers/iio/chemical/bme680_i2c.c b/drivers/iio/chemical/bme680_i2c.c
index 29c0dfa4702b..74cf89c82c0a 100644
--- a/drivers/iio/chemical/bme680_i2c.c
+++ b/drivers/iio/chemical/bme680_i2c.c
@@ -11,7 +11,6 @@
* Note: SDO pin cannot be left floating otherwise I2C address
* will be undefined.
*/
-#include <linux/acpi.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/regmap.h>
@@ -42,12 +41,6 @@ static const struct i2c_device_id bme680_i2c_id[] = {
};
MODULE_DEVICE_TABLE(i2c, bme680_i2c_id);
-static const struct acpi_device_id bme680_acpi_match[] = {
- {"BME0680", 0},
- {},
-};
-MODULE_DEVICE_TABLE(acpi, bme680_acpi_match);
-
static const struct of_device_id bme680_of_i2c_match[] = {
{ .compatible = "bosch,bme680", },
{},
@@ -57,7 +50,6 @@ MODULE_DEVICE_TABLE(of, bme680_of_i2c_match);
static struct i2c_driver bme680_i2c_driver = {
.driver = {
.name = "bme680_i2c",
- .acpi_match_table = ACPI_PTR(bme680_acpi_match),
.of_match_table = bme680_of_i2c_match,
},
.probe = bme680_i2c_probe,
diff --git a/drivers/iio/chemical/bme680_spi.c b/drivers/iio/chemical/bme680_spi.c
index 6f56ad48cc40..cc579a7ac5ce 100644
--- a/drivers/iio/chemical/bme680_spi.c
+++ b/drivers/iio/chemical/bme680_spi.c
@@ -4,7 +4,6 @@
*
* Copyright (C) 2018 Himanshu Jha <himanshujha199640@gmail.com>
*/
-#include <linux/acpi.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
@@ -145,12 +144,6 @@ static const struct spi_device_id bme680_spi_id[] = {
};
MODULE_DEVICE_TABLE(spi, bme680_spi_id);
-static const struct acpi_device_id bme680_acpi_match[] = {
- {"BME0680", 0},
- {},
-};
-MODULE_DEVICE_TABLE(acpi, bme680_acpi_match);
-
static const struct of_device_id bme680_of_spi_match[] = {
{ .compatible = "bosch,bme680", },
{},
@@ -160,7 +153,6 @@ MODULE_DEVICE_TABLE(of, bme680_of_spi_match);
static struct spi_driver bme680_spi_driver = {
.driver = {
.name = "bme680_spi",
- .acpi_match_table = ACPI_PTR(bme680_acpi_match),
.of_match_table = bme680_of_spi_match,
},
.probe = bme680_spi_probe,
diff --git a/drivers/iio/chemical/ccs811.c b/drivers/iio/chemical/ccs811.c
index 886e96496dbf..847194fa1e46 100644
--- a/drivers/iio/chemical/ccs811.c
+++ b/drivers/iio/chemical/ccs811.c
@@ -491,7 +491,7 @@ static int ccs811_probe(struct i2c_client *client,
data->drdy_trig = devm_iio_trigger_alloc(&client->dev,
"%s-dev%d",
indio_dev->name,
- indio_dev->id);
+ iio_device_id(indio_dev));
if (!data->drdy_trig) {
ret = -ENOMEM;
goto err_poweroff;
diff --git a/drivers/iio/chemical/scd30_core.c b/drivers/iio/chemical/scd30_core.c
index d89f117dd0ef..9fe6bbe9ee04 100644
--- a/drivers/iio/chemical/scd30_core.c
+++ b/drivers/iio/chemical/scd30_core.c
@@ -640,7 +640,8 @@ static int scd30_setup_trigger(struct iio_dev *indio_dev)
struct iio_trigger *trig;
int ret;
- trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name, indio_dev->id);
+ trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name,
+ iio_device_id(indio_dev));
if (!trig) {
dev_err(dev, "failed to allocate trigger\n");
return -ENOMEM;
diff --git a/drivers/iio/chemical/sgp30.c b/drivers/iio/chemical/sgp30.c
index 1029c457be15..2343d444604d 100644
--- a/drivers/iio/chemical/sgp30.c
+++ b/drivers/iio/chemical/sgp30.c
@@ -425,7 +425,7 @@ static int sgp_check_compat(struct sgp_data *data,
product = SGP_VERS_PRODUCT(data);
if (product != product_id) {
- dev_err(dev, "sensor reports a different product: 0x%04hx\n",
+ dev_err(dev, "sensor reports a different product: 0x%04x\n",
product);
return -ENODEV;
}
diff --git a/drivers/iio/chemical/sps30.c b/drivers/iio/chemical/sps30.c
index 2ea9a5c4d846..d51314505115 100644
--- a/drivers/iio/chemical/sps30.c
+++ b/drivers/iio/chemical/sps30.c
@@ -3,11 +3,8 @@
* Sensirion SPS30 particulate matter sensor driver
*
* Copyright (c) Tomasz Duszynski <tduszyns@gmail.com>
- *
- * I2C slave address: 0x69
*/
-#include <asm/unaligned.h>
#include <linux/crc8.h>
#include <linux/delay.h>
#include <linux/i2c.h>
@@ -19,27 +16,14 @@
#include <linux/kernel.h>
#include <linux/module.h>
-#define SPS30_CRC8_POLYNOMIAL 0x31
-/* max number of bytes needed to store PM measurements or serial string */
-#define SPS30_MAX_READ_SIZE 48
+#include "sps30.h"
+
/* sensor measures reliably up to 3000 ug / m3 */
#define SPS30_MAX_PM 3000
/* minimum and maximum self cleaning periods in seconds */
#define SPS30_AUTO_CLEANING_PERIOD_MIN 0
#define SPS30_AUTO_CLEANING_PERIOD_MAX 604800
-/* SPS30 commands */
-#define SPS30_START_MEAS 0x0010
-#define SPS30_STOP_MEAS 0x0104
-#define SPS30_RESET 0xd304
-#define SPS30_READ_DATA_READY_FLAG 0x0202
-#define SPS30_READ_DATA 0x0300
-#define SPS30_READ_SERIAL 0xd033
-#define SPS30_START_FAN_CLEANING 0x5607
-#define SPS30_AUTO_CLEANING_PERIOD 0x8004
-/* not a sensor command per se, used only to distinguish write from read */
-#define SPS30_READ_AUTO_CLEANING_PERIOD 0x8005
-
enum {
PM1,
PM2P5,
@@ -52,114 +36,9 @@ enum {
MEASURING,
};
-struct sps30_state {
- struct i2c_client *client;
- /*
- * Guards against concurrent access to sensor registers.
- * Must be held whenever sequence of commands is to be executed.
- */
- struct mutex lock;
- int state;
-};
-
-DECLARE_CRC8_TABLE(sps30_crc8_table);
-
-static int sps30_write_then_read(struct sps30_state *state, u8 *txbuf,
- int txsize, u8 *rxbuf, int rxsize)
-{
- int ret;
-
- /*
- * Sensor does not support repeated start so instead of
- * sending two i2c messages in a row we just send one by one.
- */
- ret = i2c_master_send(state->client, txbuf, txsize);
- if (ret != txsize)
- return ret < 0 ? ret : -EIO;
-
- if (!rxbuf)
- return 0;
-
- ret = i2c_master_recv(state->client, rxbuf, rxsize);
- if (ret != rxsize)
- return ret < 0 ? ret : -EIO;
-
- return 0;
-}
-
-static int sps30_do_cmd(struct sps30_state *state, u16 cmd, u8 *data, int size)
-{
- /*
- * Internally sensor stores measurements in a following manner:
- *
- * PM1: upper two bytes, crc8, lower two bytes, crc8
- * PM2P5: upper two bytes, crc8, lower two bytes, crc8
- * PM4: upper two bytes, crc8, lower two bytes, crc8
- * PM10: upper two bytes, crc8, lower two bytes, crc8
- *
- * What follows next are number concentration measurements and
- * typical particle size measurement which we omit.
- */
- u8 buf[SPS30_MAX_READ_SIZE] = { cmd >> 8, cmd };
- int i, ret = 0;
-
- switch (cmd) {
- case SPS30_START_MEAS:
- buf[2] = 0x03;
- buf[3] = 0x00;
- buf[4] = crc8(sps30_crc8_table, &buf[2], 2, CRC8_INIT_VALUE);
- ret = sps30_write_then_read(state, buf, 5, NULL, 0);
- break;
- case SPS30_STOP_MEAS:
- case SPS30_RESET:
- case SPS30_START_FAN_CLEANING:
- ret = sps30_write_then_read(state, buf, 2, NULL, 0);
- break;
- case SPS30_READ_AUTO_CLEANING_PERIOD:
- buf[0] = SPS30_AUTO_CLEANING_PERIOD >> 8;
- buf[1] = (u8)(SPS30_AUTO_CLEANING_PERIOD & 0xff);
- fallthrough;
- case SPS30_READ_DATA_READY_FLAG:
- case SPS30_READ_DATA:
- case SPS30_READ_SERIAL:
- /* every two data bytes are checksummed */
- size += size / 2;
- ret = sps30_write_then_read(state, buf, 2, buf, size);
- break;
- case SPS30_AUTO_CLEANING_PERIOD:
- buf[2] = data[0];
- buf[3] = data[1];
- buf[4] = crc8(sps30_crc8_table, &buf[2], 2, CRC8_INIT_VALUE);
- buf[5] = data[2];
- buf[6] = data[3];
- buf[7] = crc8(sps30_crc8_table, &buf[5], 2, CRC8_INIT_VALUE);
- ret = sps30_write_then_read(state, buf, 8, NULL, 0);
- break;
- }
-
- if (ret)
- return ret;
-
- /* validate received data and strip off crc bytes */
- for (i = 0; i < size; i += 3) {
- u8 crc = crc8(sps30_crc8_table, &buf[i], 2, CRC8_INIT_VALUE);
-
- if (crc != buf[i + 2]) {
- dev_err(&state->client->dev,
- "data integrity check failed\n");
- return -EIO;
- }
-
- *data++ = buf[i];
- *data++ = buf[i + 1];
- }
-
- return 0;
-}
-
-static s32 sps30_float_to_int_clamped(const u8 *fp)
+static s32 sps30_float_to_int_clamped(__be32 *fp)
{
- int val = get_unaligned_be32(fp);
+ int val = be32_to_cpup(fp);
int mantissa = val & GENMASK(22, 0);
/* this is fine since passed float is always non-negative */
int exp = val >> 23;
@@ -188,38 +67,35 @@ static s32 sps30_float_to_int_clamped(const u8 *fp)
static int sps30_do_meas(struct sps30_state *state, s32 *data, int size)
{
- int i, ret, tries = 5;
- u8 tmp[16];
+ int i, ret;
if (state->state == RESET) {
- ret = sps30_do_cmd(state, SPS30_START_MEAS, NULL, 0);
+ ret = state->ops->start_meas(state);
if (ret)
return ret;
state->state = MEASURING;
}
- while (tries--) {
- ret = sps30_do_cmd(state, SPS30_READ_DATA_READY_FLAG, tmp, 2);
- if (ret)
- return -EIO;
+ ret = state->ops->read_meas(state, (__be32 *)data, size);
+ if (ret)
+ return ret;
- /* new measurements ready to be read */
- if (tmp[1] == 1)
- break;
+ for (i = 0; i < size; i++)
+ data[i] = sps30_float_to_int_clamped((__be32 *)&data[i]);
- msleep_interruptible(300);
- }
+ return 0;
+}
- if (tries == -1)
- return -ETIMEDOUT;
+static int sps30_do_reset(struct sps30_state *state)
+{
+ int ret;
- ret = sps30_do_cmd(state, SPS30_READ_DATA, tmp, sizeof(int) * size);
+ ret = state->ops->reset(state);
if (ret)
return ret;
- for (i = 0; i < size; i++)
- data[i] = sps30_float_to_int_clamped(&tmp[4 * i]);
+ state->state = RESET;
return 0;
}
@@ -310,24 +186,6 @@ static int sps30_read_raw(struct iio_dev *indio_dev,
return -EINVAL;
}
-static int sps30_do_cmd_reset(struct sps30_state *state)
-{
- int ret;
-
- ret = sps30_do_cmd(state, SPS30_RESET, NULL, 0);
- msleep(300);
- /*
- * Power-on-reset causes sensor to produce some glitch on i2c bus and
- * some controllers end up in error state. Recover simply by placing
- * some data on the bus, for example STOP_MEAS command, which
- * is NOP in this case.
- */
- sps30_do_cmd(state, SPS30_STOP_MEAS, NULL, 0);
- state->state = RESET;
-
- return ret;
-}
-
static ssize_t start_cleaning_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
@@ -340,7 +198,7 @@ static ssize_t start_cleaning_store(struct device *dev,
return -EINVAL;
mutex_lock(&state->lock);
- ret = sps30_do_cmd(state, SPS30_START_FAN_CLEANING, NULL, 0);
+ ret = state->ops->clean_fan(state);
mutex_unlock(&state->lock);
if (ret)
return ret;
@@ -349,31 +207,29 @@ static ssize_t start_cleaning_store(struct device *dev,
}
static ssize_t cleaning_period_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+ struct device_attribute *attr,
+ char *buf)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct sps30_state *state = iio_priv(indio_dev);
- u8 tmp[4];
+ __be32 val;
int ret;
mutex_lock(&state->lock);
- ret = sps30_do_cmd(state, SPS30_READ_AUTO_CLEANING_PERIOD, tmp, 4);
+ ret = state->ops->read_cleaning_period(state, &val);
mutex_unlock(&state->lock);
if (ret)
return ret;
- return sprintf(buf, "%d\n", get_unaligned_be32(tmp));
+ return sprintf(buf, "%d\n", be32_to_cpu(val));
}
-static ssize_t cleaning_period_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
+static ssize_t cleaning_period_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t len)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct sps30_state *state = iio_priv(indio_dev);
int val, ret;
- u8 tmp[4];
if (kstrtoint(buf, 0, &val))
return -EINVAL;
@@ -382,10 +238,8 @@ static ssize_t cleaning_period_store(struct device *dev,
(val > SPS30_AUTO_CLEANING_PERIOD_MAX))
return -EINVAL;
- put_unaligned_be32(val, tmp);
-
mutex_lock(&state->lock);
- ret = sps30_do_cmd(state, SPS30_AUTO_CLEANING_PERIOD, tmp, 0);
+ ret = state->ops->write_cleaning_period(state, cpu_to_be32(val));
if (ret) {
mutex_unlock(&state->lock);
return ret;
@@ -397,7 +251,7 @@ static ssize_t cleaning_period_store(struct device *dev,
* sensor requires reset in order to return up to date self cleaning
* period
*/
- ret = sps30_do_cmd_reset(state);
+ ret = sps30_do_reset(state);
if (ret)
dev_warn(dev,
"period changed but reads will return the old value\n");
@@ -411,9 +265,9 @@ static ssize_t cleaning_period_available_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return snprintf(buf, PAGE_SIZE, "[%d %d %d]\n",
- SPS30_AUTO_CLEANING_PERIOD_MIN, 1,
- SPS30_AUTO_CLEANING_PERIOD_MAX);
+ return sysfs_emit(buf, "[%d %d %d]\n",
+ SPS30_AUTO_CLEANING_PERIOD_MIN, 1,
+ SPS30_AUTO_CLEANING_PERIOD_MAX);
}
static IIO_DEVICE_ATTR_WO(start_cleaning, 0);
@@ -460,90 +314,65 @@ static const struct iio_chan_spec sps30_channels[] = {
IIO_CHAN_SOFT_TIMESTAMP(4),
};
-static void sps30_stop_meas(void *data)
+static void sps30_devm_stop_meas(void *data)
{
struct sps30_state *state = data;
- sps30_do_cmd(state, SPS30_STOP_MEAS, NULL, 0);
+ if (state->state == MEASURING)
+ state->ops->stop_meas(state);
}
static const unsigned long sps30_scan_masks[] = { 0x0f, 0x00 };
-static int sps30_probe(struct i2c_client *client)
+int sps30_probe(struct device *dev, const char *name, void *priv, const struct sps30_ops *ops)
{
struct iio_dev *indio_dev;
struct sps30_state *state;
- u8 buf[32];
int ret;
- if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
- return -EOPNOTSUPP;
-
- indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*state));
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*state));
if (!indio_dev)
return -ENOMEM;
+ dev_set_drvdata(dev, indio_dev);
+
state = iio_priv(indio_dev);
- i2c_set_clientdata(client, indio_dev);
- state->client = client;
- state->state = RESET;
+ state->dev = dev;
+ state->priv = priv;
+ state->ops = ops;
+ mutex_init(&state->lock);
+
indio_dev->info = &sps30_info;
- indio_dev->name = client->name;
+ indio_dev->name = name;
indio_dev->channels = sps30_channels;
indio_dev->num_channels = ARRAY_SIZE(sps30_channels);
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->available_scan_masks = sps30_scan_masks;
- mutex_init(&state->lock);
- crc8_populate_msb(sps30_crc8_table, SPS30_CRC8_POLYNOMIAL);
-
- ret = sps30_do_cmd_reset(state);
+ ret = sps30_do_reset(state);
if (ret) {
- dev_err(&client->dev, "failed to reset device\n");
+ dev_err(dev, "failed to reset device\n");
return ret;
}
- ret = sps30_do_cmd(state, SPS30_READ_SERIAL, buf, sizeof(buf));
+ ret = state->ops->show_info(state);
if (ret) {
- dev_err(&client->dev, "failed to read serial number\n");
+ dev_err(dev, "failed to read device info\n");
return ret;
}
- /* returned serial number is already NUL terminated */
- dev_info(&client->dev, "serial number: %s\n", buf);
- ret = devm_add_action_or_reset(&client->dev, sps30_stop_meas, state);
+ ret = devm_add_action_or_reset(dev, sps30_devm_stop_meas, state);
if (ret)
return ret;
- ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev, NULL,
+ ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL,
sps30_trigger_handler, NULL);
if (ret)
return ret;
- return devm_iio_device_register(&client->dev, indio_dev);
+ return devm_iio_device_register(dev, indio_dev);
}
-
-static const struct i2c_device_id sps30_id[] = {
- { "sps30" },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, sps30_id);
-
-static const struct of_device_id sps30_of_match[] = {
- { .compatible = "sensirion,sps30" },
- { }
-};
-MODULE_DEVICE_TABLE(of, sps30_of_match);
-
-static struct i2c_driver sps30_driver = {
- .driver = {
- .name = "sps30",
- .of_match_table = sps30_of_match,
- },
- .id_table = sps30_id,
- .probe_new = sps30_probe,
-};
-module_i2c_driver(sps30_driver);
+EXPORT_SYMBOL_GPL(sps30_probe);
MODULE_AUTHOR("Tomasz Duszynski <tduszyns@gmail.com>");
MODULE_DESCRIPTION("Sensirion SPS30 particulate matter sensor driver");
diff --git a/drivers/iio/chemical/sps30.h b/drivers/iio/chemical/sps30.h
new file mode 100644
index 000000000000..a58ee43cf45d
--- /dev/null
+++ b/drivers/iio/chemical/sps30.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _SPS30_H
+#define _SPS30_H
+
+#include <linux/types.h>
+
+struct sps30_state;
+struct sps30_ops {
+ int (*start_meas)(struct sps30_state *state);
+ int (*stop_meas)(struct sps30_state *state);
+ int (*read_meas)(struct sps30_state *state, __be32 *meas, size_t num);
+ int (*reset)(struct sps30_state *state);
+ int (*clean_fan)(struct sps30_state *state);
+ int (*read_cleaning_period)(struct sps30_state *state, __be32 *period);
+ int (*write_cleaning_period)(struct sps30_state *state, __be32 period);
+ int (*show_info)(struct sps30_state *state);
+};
+
+struct sps30_state {
+ /* serialize access to the device */
+ struct mutex lock;
+ struct device *dev;
+ int state;
+ /*
+ * priv pointer is solely for serdev driver private data. We keep it
+ * here because driver_data inside dev has been already used for iio and
+ * struct serdev_device doesn't have one.
+ */
+ void *priv;
+ const struct sps30_ops *ops;
+};
+
+int sps30_probe(struct device *dev, const char *name, void *priv, const struct sps30_ops *ops);
+
+#endif
diff --git a/drivers/iio/chemical/sps30_i2c.c b/drivers/iio/chemical/sps30_i2c.c
new file mode 100644
index 000000000000..d33560ed7184
--- /dev/null
+++ b/drivers/iio/chemical/sps30_i2c.c
@@ -0,0 +1,258 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Sensirion SPS30 particulate matter sensor i2c driver
+ *
+ * Copyright (c) 2020 Tomasz Duszynski <tomasz.duszynski@octakon.com>
+ *
+ * I2C slave address: 0x69
+ */
+#include <asm/unaligned.h>
+#include <linux/crc8.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/types.h>
+
+#include "sps30.h"
+
+#define SPS30_I2C_CRC8_POLYNOMIAL 0x31
+/* max number of bytes needed to store PM measurements or serial string */
+#define SPS30_I2C_MAX_BUF_SIZE 48
+
+DECLARE_CRC8_TABLE(sps30_i2c_crc8_table);
+
+#define SPS30_I2C_START_MEAS 0x0010
+#define SPS30_I2C_STOP_MEAS 0x0104
+#define SPS30_I2C_READ_MEAS 0x0300
+#define SPS30_I2C_MEAS_READY 0x0202
+#define SPS30_I2C_RESET 0xd304
+#define SPS30_I2C_CLEAN_FAN 0x5607
+#define SPS30_I2C_PERIOD 0x8004
+#define SPS30_I2C_READ_SERIAL 0xd033
+#define SPS30_I2C_READ_VERSION 0xd100
+
+static int sps30_i2c_xfer(struct sps30_state *state, unsigned char *txbuf, size_t txsize,
+ unsigned char *rxbuf, size_t rxsize)
+{
+ struct i2c_client *client = to_i2c_client(state->dev);
+ int ret;
+
+ /*
+ * Sensor does not support repeated start so instead of
+ * sending two i2c messages in a row we just send one by one.
+ */
+ ret = i2c_master_send(client, txbuf, txsize);
+ if (ret < 0)
+ return ret;
+ if (ret != txsize)
+ return -EIO;
+
+ if (!rxsize)
+ return 0;
+
+ ret = i2c_master_recv(client, rxbuf, rxsize);
+ if (ret < 0)
+ return ret;
+ if (ret != rxsize)
+ return -EIO;
+
+ return 0;
+}
+
+static int sps30_i2c_command(struct sps30_state *state, u16 cmd, void *arg, size_t arg_size,
+ void *rsp, size_t rsp_size)
+{
+ /*
+ * Internally sensor stores measurements in a following manner:
+ *
+ * PM1: upper two bytes, crc8, lower two bytes, crc8
+ * PM2P5: upper two bytes, crc8, lower two bytes, crc8
+ * PM4: upper two bytes, crc8, lower two bytes, crc8
+ * PM10: upper two bytes, crc8, lower two bytes, crc8
+ *
+ * What follows next are number concentration measurements and
+ * typical particle size measurement which we omit.
+ */
+ unsigned char buf[SPS30_I2C_MAX_BUF_SIZE];
+ unsigned char *tmp;
+ unsigned char crc;
+ size_t i;
+ int ret;
+
+ put_unaligned_be16(cmd, buf);
+ i = 2;
+
+ if (rsp) {
+ /* each two bytes are followed by a crc8 */
+ rsp_size += rsp_size / 2;
+ } else {
+ tmp = arg;
+
+ while (arg_size) {
+ buf[i] = *tmp++;
+ buf[i + 1] = *tmp++;
+ buf[i + 2] = crc8(sps30_i2c_crc8_table, buf + i, 2, CRC8_INIT_VALUE);
+ arg_size -= 2;
+ i += 3;
+ }
+ }
+
+ ret = sps30_i2c_xfer(state, buf, i, buf, rsp_size);
+ if (ret)
+ return ret;
+
+ /* validate received data and strip off crc bytes */
+ tmp = rsp;
+ for (i = 0; i < rsp_size; i += 3) {
+ crc = crc8(sps30_i2c_crc8_table, buf + i, 2, CRC8_INIT_VALUE);
+ if (crc != buf[i + 2]) {
+ dev_err(state->dev, "data integrity check failed\n");
+ return -EIO;
+ }
+
+ *tmp++ = buf[i];
+ *tmp++ = buf[i + 1];
+ }
+
+ return 0;
+}
+
+static int sps30_i2c_start_meas(struct sps30_state *state)
+{
+ /* request BE IEEE754 formatted data */
+ unsigned char buf[] = { 0x03, 0x00 };
+
+ return sps30_i2c_command(state, SPS30_I2C_START_MEAS, buf, sizeof(buf), NULL, 0);
+}
+
+static int sps30_i2c_stop_meas(struct sps30_state *state)
+{
+ return sps30_i2c_command(state, SPS30_I2C_STOP_MEAS, NULL, 0, NULL, 0);
+}
+
+static int sps30_i2c_reset(struct sps30_state *state)
+{
+ int ret;
+
+ ret = sps30_i2c_command(state, SPS30_I2C_RESET, NULL, 0, NULL, 0);
+ msleep(500);
+ /*
+ * Power-on-reset causes sensor to produce some glitch on i2c bus and
+ * some controllers end up in error state. Recover simply by placing
+ * some data on the bus, for example STOP_MEAS command, which
+ * is NOP in this case.
+ */
+ sps30_i2c_stop_meas(state);
+
+ return ret;
+}
+
+static bool sps30_i2c_meas_ready(struct sps30_state *state)
+{
+ unsigned char buf[2];
+ int ret;
+
+ ret = sps30_i2c_command(state, SPS30_I2C_MEAS_READY, NULL, 0, buf, sizeof(buf));
+ if (ret)
+ return false;
+
+ return buf[1];
+}
+
+static int sps30_i2c_read_meas(struct sps30_state *state, __be32 *meas, size_t num)
+{
+ /* measurements are ready within a second */
+ if (msleep_interruptible(1000))
+ return -EINTR;
+
+ if (!sps30_i2c_meas_ready(state))
+ return -ETIMEDOUT;
+
+ return sps30_i2c_command(state, SPS30_I2C_READ_MEAS, NULL, 0, meas, sizeof(num) * num);
+}
+
+static int sps30_i2c_clean_fan(struct sps30_state *state)
+{
+ return sps30_i2c_command(state, SPS30_I2C_CLEAN_FAN, NULL, 0, NULL, 0);
+}
+
+static int sps30_i2c_read_cleaning_period(struct sps30_state *state, __be32 *period)
+{
+ return sps30_i2c_command(state, SPS30_I2C_PERIOD, NULL, 0, period, sizeof(*period));
+}
+
+static int sps30_i2c_write_cleaning_period(struct sps30_state *state, __be32 period)
+{
+ return sps30_i2c_command(state, SPS30_I2C_PERIOD, &period, sizeof(period), NULL, 0);
+}
+
+static int sps30_i2c_show_info(struct sps30_state *state)
+{
+ /* extra nul just in case */
+ unsigned char buf[32 + 1] = { 0x00 };
+ int ret;
+
+ ret = sps30_i2c_command(state, SPS30_I2C_READ_SERIAL, NULL, 0, buf, sizeof(buf) - 1);
+ if (ret)
+ return ret;
+
+ dev_info(state->dev, "serial number: %s\n", buf);
+
+ ret = sps30_i2c_command(state, SPS30_I2C_READ_VERSION, NULL, 0, buf, 2);
+ if (ret)
+ return ret;
+
+ dev_info(state->dev, "fw version: %u.%u\n", buf[0], buf[1]);
+
+ return 0;
+}
+
+static const struct sps30_ops sps30_i2c_ops = {
+ .start_meas = sps30_i2c_start_meas,
+ .stop_meas = sps30_i2c_stop_meas,
+ .read_meas = sps30_i2c_read_meas,
+ .reset = sps30_i2c_reset,
+ .clean_fan = sps30_i2c_clean_fan,
+ .read_cleaning_period = sps30_i2c_read_cleaning_period,
+ .write_cleaning_period = sps30_i2c_write_cleaning_period,
+ .show_info = sps30_i2c_show_info,
+};
+
+static int sps30_i2c_probe(struct i2c_client *client)
+{
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
+ return -EOPNOTSUPP;
+
+ crc8_populate_msb(sps30_i2c_crc8_table, SPS30_I2C_CRC8_POLYNOMIAL);
+
+ return sps30_probe(&client->dev, client->name, NULL, &sps30_i2c_ops);
+}
+
+static const struct i2c_device_id sps30_i2c_id[] = {
+ { "sps30" },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, sps30_i2c_id);
+
+static const struct of_device_id sps30_i2c_of_match[] = {
+ { .compatible = "sensirion,sps30" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, sps30_i2c_of_match);
+
+static struct i2c_driver sps30_i2c_driver = {
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .of_match_table = sps30_i2c_of_match,
+ },
+ .id_table = sps30_i2c_id,
+ .probe_new = sps30_i2c_probe,
+};
+module_i2c_driver(sps30_i2c_driver);
+
+MODULE_AUTHOR("Tomasz Duszynski <tomasz.duszynski@octakon.com>");
+MODULE_DESCRIPTION("Sensirion SPS30 particulate matter sensor i2c driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/chemical/sps30_serial.c b/drivers/iio/chemical/sps30_serial.c
new file mode 100644
index 000000000000..3f311d50087c
--- /dev/null
+++ b/drivers/iio/chemical/sps30_serial.c
@@ -0,0 +1,431 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Sensirion SPS30 particulate matter sensor serial driver
+ *
+ * Copyright (c) 2021 Tomasz Duszynski <tomasz.duszynski@octakon.com>
+ */
+#include <linux/completion.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/iio/iio.h>
+#include <linux/minmax.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/serdev.h>
+#include <linux/types.h>
+
+#include "sps30.h"
+
+#define SPS30_SERIAL_DEV_NAME "sps30"
+
+#define SPS30_SERIAL_SOF_EOF 0x7e
+#define SPS30_SERIAL_TIMEOUT msecs_to_jiffies(20)
+#define SPS30_SERIAL_MAX_BUF_SIZE 263
+#define SPS30_SERIAL_ESCAPE_CHAR 0x7d
+
+#define SPS30_SERIAL_FRAME_MIN_SIZE 7
+#define SPS30_SERIAL_FRAME_ADR_OFFSET 1
+#define SPS30_SERIAL_FRAME_CMD_OFFSET 2
+#define SPS30_SERIAL_FRAME_MOSI_LEN_OFFSET 3
+#define SPS30_SERIAL_FRAME_MISO_STATE_OFFSET 3
+#define SPS30_SERIAL_FRAME_MISO_LEN_OFFSET 4
+#define SPS30_SERIAL_FRAME_MISO_DATA_OFFSET 5
+
+#define SPS30_SERIAL_START_MEAS 0x00
+#define SPS30_SERIAL_STOP_MEAS 0x01
+#define SPS30_SERIAL_READ_MEAS 0x03
+#define SPS30_SERIAL_RESET 0xd3
+#define SPS30_SERIAL_CLEAN_FAN 0x56
+#define SPS30_SERIAL_PERIOD 0x80
+#define SPS30_SERIAL_DEV_INFO 0xd0
+#define SPS30_SERIAL_READ_VERSION 0xd1
+
+struct sps30_serial_priv {
+ struct completion new_frame;
+ unsigned char buf[SPS30_SERIAL_MAX_BUF_SIZE];
+ size_t num;
+ bool escaped;
+ bool done;
+};
+
+static int sps30_serial_xfer(struct sps30_state *state, const unsigned char *buf, size_t size)
+{
+ struct serdev_device *serdev = to_serdev_device(state->dev);
+ struct sps30_serial_priv *priv = state->priv;
+ int ret;
+
+ priv->num = 0;
+ priv->escaped = false;
+ priv->done = false;
+
+ ret = serdev_device_write(serdev, buf, size, SPS30_SERIAL_TIMEOUT);
+ if (ret < 0)
+ return ret;
+ if (ret != size)
+ return -EIO;
+
+ ret = wait_for_completion_interruptible_timeout(&priv->new_frame, SPS30_SERIAL_TIMEOUT);
+ if (ret < 0)
+ return ret;
+ if (!ret)
+ return -ETIMEDOUT;
+
+ return 0;
+}
+
+static const struct {
+ unsigned char byte;
+ unsigned char byte2;
+} sps30_serial_bytes[] = {
+ { 0x11, 0x31 },
+ { 0x13, 0x33 },
+ { 0x7e, 0x5e },
+ { 0x7d, 0x5d },
+};
+
+static int sps30_serial_put_byte(unsigned char *buf, unsigned char byte)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(sps30_serial_bytes); i++) {
+ if (sps30_serial_bytes[i].byte != byte)
+ continue;
+
+ buf[0] = SPS30_SERIAL_ESCAPE_CHAR;
+ buf[1] = sps30_serial_bytes[i].byte2;
+
+ return 2;
+ }
+
+ buf[0] = byte;
+
+ return 1;
+}
+
+static char sps30_serial_get_byte(bool escaped, unsigned char byte2)
+{
+ int i;
+
+ if (!escaped)
+ return byte2;
+
+ for (i = 0; i < ARRAY_SIZE(sps30_serial_bytes); i++) {
+ if (sps30_serial_bytes[i].byte2 != byte2)
+ continue;
+
+ return sps30_serial_bytes[i].byte;
+ }
+
+ return 0;
+}
+
+static unsigned char sps30_serial_calc_chksum(const unsigned char *buf, size_t num)
+{
+ unsigned int chksum = 0;
+ size_t i;
+
+ for (i = 0; i < num; i++)
+ chksum += buf[i];
+
+ return ~chksum;
+}
+
+static int sps30_serial_prep_frame(unsigned char *buf, unsigned char cmd,
+ const unsigned char *arg, size_t arg_size)
+{
+ unsigned char chksum;
+ int num = 0;
+ size_t i;
+
+ buf[num++] = SPS30_SERIAL_SOF_EOF;
+ buf[num++] = 0;
+ num += sps30_serial_put_byte(buf + num, cmd);
+ num += sps30_serial_put_byte(buf + num, arg_size);
+
+ for (i = 0; i < arg_size; i++)
+ num += sps30_serial_put_byte(buf + num, arg[i]);
+
+ /* SOF isn't checksummed */
+ chksum = sps30_serial_calc_chksum(buf + 1, num - 1);
+ num += sps30_serial_put_byte(buf + num, chksum);
+ buf[num++] = SPS30_SERIAL_SOF_EOF;
+
+ return num;
+}
+
+static bool sps30_serial_frame_valid(struct sps30_state *state, const unsigned char *buf)
+{
+ struct sps30_serial_priv *priv = state->priv;
+ unsigned char chksum;
+
+ if ((priv->num < SPS30_SERIAL_FRAME_MIN_SIZE) ||
+ (priv->num != SPS30_SERIAL_FRAME_MIN_SIZE +
+ priv->buf[SPS30_SERIAL_FRAME_MISO_LEN_OFFSET])) {
+ dev_err(state->dev, "frame has invalid number of bytes\n");
+ return false;
+ }
+
+ if ((priv->buf[SPS30_SERIAL_FRAME_ADR_OFFSET] != buf[SPS30_SERIAL_FRAME_ADR_OFFSET]) ||
+ (priv->buf[SPS30_SERIAL_FRAME_CMD_OFFSET] != buf[SPS30_SERIAL_FRAME_CMD_OFFSET])) {
+ dev_err(state->dev, "frame has wrong ADR and CMD bytes\n");
+ return false;
+ }
+
+ if (priv->buf[SPS30_SERIAL_FRAME_MISO_STATE_OFFSET]) {
+ dev_err(state->dev, "frame with non-zero state received (0x%02x)\n",
+ priv->buf[SPS30_SERIAL_FRAME_MISO_STATE_OFFSET]);
+ return false;
+ }
+
+ /* SOF, checksum and EOF are not checksummed */
+ chksum = sps30_serial_calc_chksum(priv->buf + 1, priv->num - 3);
+ if (priv->buf[priv->num - 2] != chksum) {
+ dev_err(state->dev, "frame integrity check failed\n");
+ return false;
+ }
+
+ return true;
+}
+
+static int sps30_serial_command(struct sps30_state *state, unsigned char cmd,
+ const void *arg, size_t arg_size, void *rsp, size_t rsp_size)
+{
+ struct sps30_serial_priv *priv = state->priv;
+ unsigned char buf[SPS30_SERIAL_MAX_BUF_SIZE];
+ int ret, size;
+
+ size = sps30_serial_prep_frame(buf, cmd, arg, arg_size);
+ ret = sps30_serial_xfer(state, buf, size);
+ if (ret)
+ return ret;
+
+ if (!sps30_serial_frame_valid(state, buf))
+ return -EIO;
+
+ if (rsp) {
+ rsp_size = min_t(size_t, priv->buf[SPS30_SERIAL_FRAME_MISO_LEN_OFFSET], rsp_size);
+ memcpy(rsp, &priv->buf[SPS30_SERIAL_FRAME_MISO_DATA_OFFSET], rsp_size);
+ }
+
+ return rsp_size;
+}
+
+static int sps30_serial_receive_buf(struct serdev_device *serdev,
+ const unsigned char *buf, size_t size)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(&serdev->dev);
+ struct sps30_serial_priv *priv;
+ struct sps30_state *state;
+ unsigned char byte;
+ size_t i;
+
+ if (!indio_dev)
+ return 0;
+
+ state = iio_priv(indio_dev);
+ priv = state->priv;
+
+ /* just in case device put some unexpected data on the bus */
+ if (priv->done)
+ return size;
+
+ /* wait for the start of frame */
+ if (!priv->num && size && buf[0] != SPS30_SERIAL_SOF_EOF)
+ return 1;
+
+ if (priv->num + size >= ARRAY_SIZE(priv->buf))
+ size = ARRAY_SIZE(priv->buf) - priv->num;
+
+ for (i = 0; i < size; i++) {
+ byte = buf[i];
+ /* remove stuffed bytes on-the-fly */
+ if (byte == SPS30_SERIAL_ESCAPE_CHAR) {
+ priv->escaped = true;
+ continue;
+ }
+
+ byte = sps30_serial_get_byte(priv->escaped, byte);
+ if (priv->escaped && !byte)
+ dev_warn(state->dev, "unrecognized escaped char (0x%02x)\n", byte);
+
+ priv->buf[priv->num++] = byte;
+
+ /* EOF received */
+ if (!priv->escaped && byte == SPS30_SERIAL_SOF_EOF) {
+ if (priv->num < SPS30_SERIAL_FRAME_MIN_SIZE)
+ continue;
+
+ priv->done = true;
+ complete(&priv->new_frame);
+ i++;
+ break;
+ }
+
+ priv->escaped = false;
+ }
+
+ return i;
+}
+
+static const struct serdev_device_ops sps30_serial_device_ops = {
+ .receive_buf = sps30_serial_receive_buf,
+ .write_wakeup = serdev_device_write_wakeup,
+};
+
+static int sps30_serial_start_meas(struct sps30_state *state)
+{
+ /* request BE IEEE754 formatted data */
+ unsigned char buf[] = { 0x01, 0x03 };
+
+ return sps30_serial_command(state, SPS30_SERIAL_START_MEAS, buf, sizeof(buf), NULL, 0);
+}
+
+static int sps30_serial_stop_meas(struct sps30_state *state)
+{
+ return sps30_serial_command(state, SPS30_SERIAL_STOP_MEAS, NULL, 0, NULL, 0);
+}
+
+static int sps30_serial_reset(struct sps30_state *state)
+{
+ int ret;
+
+ ret = sps30_serial_command(state, SPS30_SERIAL_RESET, NULL, 0, NULL, 0);
+ msleep(500);
+
+ return ret;
+}
+
+static int sps30_serial_read_meas(struct sps30_state *state, __be32 *meas, size_t num)
+{
+ int ret;
+
+ /* measurements are ready within a second */
+ if (msleep_interruptible(1000))
+ return -EINTR;
+
+ ret = sps30_serial_command(state, SPS30_SERIAL_READ_MEAS, NULL, 0, meas, num * sizeof(num));
+ if (ret < 0)
+ return ret;
+ /* if measurements aren't ready sensor returns empty frame */
+ if (ret == SPS30_SERIAL_FRAME_MIN_SIZE)
+ return -ETIMEDOUT;
+ if (ret != num * sizeof(*meas))
+ return -EIO;
+
+ return 0;
+}
+
+static int sps30_serial_clean_fan(struct sps30_state *state)
+{
+ return sps30_serial_command(state, SPS30_SERIAL_CLEAN_FAN, NULL, 0, NULL, 0);
+}
+
+static int sps30_serial_read_cleaning_period(struct sps30_state *state, __be32 *period)
+{
+ unsigned char buf[] = { 0x00 };
+ int ret;
+
+ ret = sps30_serial_command(state, SPS30_SERIAL_PERIOD, buf, sizeof(buf),
+ period, sizeof(*period));
+ if (ret < 0)
+ return ret;
+ if (ret != sizeof(*period))
+ return -EIO;
+
+ return 0;
+}
+
+static int sps30_serial_write_cleaning_period(struct sps30_state *state, __be32 period)
+{
+ unsigned char buf[5] = { 0x00 };
+
+ memcpy(buf + 1, &period, sizeof(period));
+
+ return sps30_serial_command(state, SPS30_SERIAL_PERIOD, buf, sizeof(buf), NULL, 0);
+}
+
+static int sps30_serial_show_info(struct sps30_state *state)
+{
+ /*
+ * tell device do return serial number and add extra nul byte just in case
+ * serial number isn't a valid string
+ */
+ unsigned char buf[32 + 1] = { 0x03 };
+ struct device *dev = state->dev;
+ int ret;
+
+ ret = sps30_serial_command(state, SPS30_SERIAL_DEV_INFO, buf, 1, buf, sizeof(buf) - 1);
+ if (ret < 0)
+ return ret;
+ if (ret != sizeof(buf) - 1)
+ return -EIO;
+
+ dev_info(dev, "serial number: %s\n", buf);
+
+ ret = sps30_serial_command(state, SPS30_SERIAL_READ_VERSION, NULL, 0, buf, sizeof(buf) - 1);
+ if (ret < 0)
+ return ret;
+ if (ret < 2)
+ return -EIO;
+
+ dev_info(dev, "fw version: %u.%u\n", buf[0], buf[1]);
+
+ return 0;
+}
+
+static const struct sps30_ops sps30_serial_ops = {
+ .start_meas = sps30_serial_start_meas,
+ .stop_meas = sps30_serial_stop_meas,
+ .read_meas = sps30_serial_read_meas,
+ .reset = sps30_serial_reset,
+ .clean_fan = sps30_serial_clean_fan,
+ .read_cleaning_period = sps30_serial_read_cleaning_period,
+ .write_cleaning_period = sps30_serial_write_cleaning_period,
+ .show_info = sps30_serial_show_info,
+};
+
+static int sps30_serial_probe(struct serdev_device *serdev)
+{
+ struct device *dev = &serdev->dev;
+ struct sps30_serial_priv *priv;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ init_completion(&priv->new_frame);
+ serdev_device_set_client_ops(serdev, &sps30_serial_device_ops);
+
+ ret = devm_serdev_device_open(dev, serdev);
+ if (ret)
+ return ret;
+
+ serdev_device_set_baudrate(serdev, 115200);
+ serdev_device_set_flow_control(serdev, false);
+
+ ret = serdev_device_set_parity(serdev, SERDEV_PARITY_NONE);
+ if (ret)
+ return ret;
+
+ return sps30_probe(dev, SPS30_SERIAL_DEV_NAME, priv, &sps30_serial_ops);
+}
+
+static const struct of_device_id sps30_serial_of_match[] = {
+ { .compatible = "sensirion,sps30" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, sps30_serial_of_match);
+
+static struct serdev_device_driver sps30_serial_driver = {
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .of_match_table = sps30_serial_of_match,
+ },
+ .probe = sps30_serial_probe,
+};
+module_serdev_device_driver(sps30_serial_driver);
+
+MODULE_AUTHOR("Tomasz Duszynski <tomasz.duszynski@octakon.com>");
+MODULE_DESCRIPTION("Sensirion SPS30 particulate matter sensor serial driver");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 00:59:22 +0000