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path: root/drivers/iio/humidity/hts221_buffer.c
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Diffstat (limited to 'drivers/iio/humidity/hts221_buffer.c')
-rw-r--r--drivers/iio/humidity/hts221_buffer.c92
1 files changed, 64 insertions, 28 deletions
diff --git a/drivers/iio/humidity/hts221_buffer.c b/drivers/iio/humidity/hts221_buffer.c
index 7d19a3da7ab7..4d03db19063e 100644
--- a/drivers/iio/humidity/hts221_buffer.c
+++ b/drivers/iio/humidity/hts221_buffer.c
@@ -1,17 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* STMicroelectronics hts221 sensor driver
*
* Copyright 2016 STMicroelectronics Inc.
*
* Lorenzo Bianconi <lorenzo.bianconi@st.com>
- *
- * Licensed under the GPL-2.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/irqreturn.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/bitfield.h>
#include <linux/iio/iio.h>
#include <linux/iio/trigger.h>
@@ -20,8 +22,16 @@
#include <linux/iio/triggered_buffer.h>
#include <linux/iio/buffer.h>
+#include <linux/platform_data/st_sensors_pdata.h>
+
#include "hts221.h"
+#define HTS221_REG_DRDY_HL_ADDR 0x22
+#define HTS221_REG_DRDY_HL_MASK BIT(7)
+#define HTS221_REG_DRDY_PP_OD_ADDR 0x22
+#define HTS221_REG_DRDY_PP_OD_MASK BIT(6)
+#define HTS221_REG_DRDY_EN_ADDR 0x22
+#define HTS221_REG_DRDY_EN_MASK BIT(2)
#define HTS221_REG_STATUS_ADDR 0x27
#define HTS221_RH_DRDY_MASK BIT(1)
#define HTS221_TEMP_DRDY_MASK BIT(0)
@@ -31,26 +41,25 @@ static int hts221_trig_set_state(struct iio_trigger *trig, bool state)
struct iio_dev *iio_dev = iio_trigger_get_drvdata(trig);
struct hts221_hw *hw = iio_priv(iio_dev);
- return hts221_config_drdy(hw, state);
+ return regmap_update_bits(hw->regmap, HTS221_REG_DRDY_EN_ADDR,
+ HTS221_REG_DRDY_EN_MASK,
+ FIELD_PREP(HTS221_REG_DRDY_EN_MASK, state));
}
static const struct iio_trigger_ops hts221_trigger_ops = {
- .owner = THIS_MODULE,
.set_trigger_state = hts221_trig_set_state,
};
static irqreturn_t hts221_trigger_handler_thread(int irq, void *private)
{
struct hts221_hw *hw = private;
- u8 status;
- int err;
+ int err, status;
- err = hw->tf->read(hw->dev, HTS221_REG_STATUS_ADDR, sizeof(status),
- &status);
+ err = regmap_read(hw->regmap, HTS221_REG_STATUS_ADDR, &status);
if (err < 0)
return IRQ_HANDLED;
- /*
+ /*
* H_DA bit (humidity data available) is routed to DRDY line.
* Humidity sample is computed after temperature one.
* Here we can assume data channels are both available if H_DA bit
@@ -59,23 +68,28 @@ static irqreturn_t hts221_trigger_handler_thread(int irq, void *private)
if (!(status & HTS221_RH_DRDY_MASK))
return IRQ_NONE;
- iio_trigger_poll_chained(hw->trig);
+ iio_trigger_poll_nested(hw->trig);
return IRQ_HANDLED;
}
-int hts221_allocate_trigger(struct hts221_hw *hw)
+int hts221_allocate_trigger(struct iio_dev *iio_dev)
{
- struct iio_dev *iio_dev = iio_priv_to_dev(hw);
+ struct hts221_hw *hw = iio_priv(iio_dev);
+ struct st_sensors_platform_data *pdata = dev_get_platdata(hw->dev);
+ bool irq_active_low = false, open_drain = false;
unsigned long irq_type;
int err;
- irq_type = irqd_get_trigger_type(irq_get_irq_data(hw->irq));
-
+ irq_type = irq_get_trigger_type(hw->irq);
switch (irq_type) {
case IRQF_TRIGGER_HIGH:
case IRQF_TRIGGER_RISING:
break;
+ case IRQF_TRIGGER_LOW:
+ case IRQF_TRIGGER_FALLING:
+ irq_active_low = true;
+ break;
default:
dev_info(hw->dev,
"mode %lx unsupported, using IRQF_TRIGGER_RISING\n",
@@ -84,6 +98,26 @@ int hts221_allocate_trigger(struct hts221_hw *hw)
break;
}
+ err = regmap_update_bits(hw->regmap, HTS221_REG_DRDY_HL_ADDR,
+ HTS221_REG_DRDY_HL_MASK,
+ FIELD_PREP(HTS221_REG_DRDY_HL_MASK,
+ irq_active_low));
+ if (err < 0)
+ return err;
+
+ if (device_property_read_bool(hw->dev, "drive-open-drain") ||
+ (pdata && pdata->open_drain)) {
+ irq_type |= IRQF_SHARED;
+ open_drain = true;
+ }
+
+ err = regmap_update_bits(hw->regmap, HTS221_REG_DRDY_PP_OD_ADDR,
+ HTS221_REG_DRDY_PP_OD_MASK,
+ FIELD_PREP(HTS221_REG_DRDY_PP_OD_MASK,
+ open_drain));
+ if (err < 0)
+ return err;
+
err = devm_request_threaded_irq(hw->dev, hw->irq, NULL,
hts221_trigger_handler_thread,
irq_type | IRQF_ONESHOT,
@@ -101,32 +135,31 @@ int hts221_allocate_trigger(struct hts221_hw *hw)
iio_trigger_set_drvdata(hw->trig, iio_dev);
hw->trig->ops = &hts221_trigger_ops;
- hw->trig->dev.parent = hw->dev;
+
+ err = devm_iio_trigger_register(hw->dev, hw->trig);
+
iio_dev->trig = iio_trigger_get(hw->trig);
- return devm_iio_trigger_register(hw->dev, hw->trig);
+ return err;
}
static int hts221_buffer_preenable(struct iio_dev *iio_dev)
{
- return hts221_power_on(iio_priv(iio_dev));
+ return hts221_set_enable(iio_priv(iio_dev), true);
}
static int hts221_buffer_postdisable(struct iio_dev *iio_dev)
{
- return hts221_power_off(iio_priv(iio_dev));
+ return hts221_set_enable(iio_priv(iio_dev), false);
}
static const struct iio_buffer_setup_ops hts221_buffer_ops = {
.preenable = hts221_buffer_preenable,
- .postenable = iio_triggered_buffer_postenable,
- .predisable = iio_triggered_buffer_predisable,
.postdisable = hts221_buffer_postdisable,
};
static irqreturn_t hts221_buffer_handler_thread(int irq, void *p)
{
- u8 buffer[ALIGN(2 * HTS221_DATA_SIZE, sizeof(s64)) + sizeof(s64)];
struct iio_poll_func *pf = p;
struct iio_dev *iio_dev = pf->indio_dev;
struct hts221_hw *hw = iio_priv(iio_dev);
@@ -135,19 +168,21 @@ static irqreturn_t hts221_buffer_handler_thread(int irq, void *p)
/* humidity data */
ch = &iio_dev->channels[HTS221_SENSOR_H];
- err = hw->tf->read(hw->dev, ch->address, HTS221_DATA_SIZE,
- buffer);
+ err = regmap_bulk_read(hw->regmap, ch->address,
+ &hw->scan.channels[0],
+ sizeof(hw->scan.channels[0]));
if (err < 0)
goto out;
/* temperature data */
ch = &iio_dev->channels[HTS221_SENSOR_T];
- err = hw->tf->read(hw->dev, ch->address, HTS221_DATA_SIZE,
- buffer + HTS221_DATA_SIZE);
+ err = regmap_bulk_read(hw->regmap, ch->address,
+ &hw->scan.channels[1],
+ sizeof(hw->scan.channels[1]));
if (err < 0)
goto out;
- iio_push_to_buffers_with_timestamp(iio_dev, buffer,
+ iio_push_to_buffers_with_timestamp(iio_dev, &hw->scan,
iio_get_time_ns(iio_dev));
out:
@@ -156,9 +191,10 @@ out:
return IRQ_HANDLED;
}
-int hts221_allocate_buffers(struct hts221_hw *hw)
+int hts221_allocate_buffers(struct iio_dev *iio_dev)
{
- return devm_iio_triggered_buffer_setup(hw->dev, iio_priv_to_dev(hw),
+ struct hts221_hw *hw = iio_priv(iio_dev);
+ return devm_iio_triggered_buffer_setup(hw->dev, iio_dev,
NULL, hts221_buffer_handler_thread,
&hts221_buffer_ops);
}
generated by cgit (git 2.34.1) at 2025-12-25 21:32:11 +0000