1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * STMicroelectronics magnetometers driver 4 * 5 * Copyright 2012-2013 STMicroelectronics Inc. 6 * 7 * Denis Ciocca <denis.ciocca@st.com> 8 */ 9 10 #include <linux/module.h> 11 #include <linux/kernel.h> 12 #include <linux/iio/iio.h> 13 #include <linux/iio/buffer.h> 14 #include <linux/iio/trigger.h> 15 #include <linux/iio/triggered_buffer.h> 16 17 #include <linux/iio/common/st_sensors.h> 18 #include "st_magn.h" 19 20 int st_magn_trig_set_state(struct iio_trigger *trig, bool state) 21 { 22 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); 23 24 return st_sensors_set_dataready_irq(indio_dev, state); 25 } 26 27 static int st_magn_buffer_postenable(struct iio_dev *indio_dev) 28 { 29 return st_sensors_set_enable(indio_dev, true); 30 } 31 32 static int st_magn_buffer_predisable(struct iio_dev *indio_dev) 33 { 34 return st_sensors_set_enable(indio_dev, false); 35 } 36 37 static const struct iio_buffer_setup_ops st_magn_buffer_setup_ops = { 38 .postenable = &st_magn_buffer_postenable, 39 .predisable = &st_magn_buffer_predisable, 40 }; 41 42 int st_magn_allocate_ring(struct iio_dev *indio_dev) 43 { 44 return devm_iio_triggered_buffer_setup(indio_dev->dev.parent, indio_dev, 45 NULL, &st_sensors_trigger_handler, &st_magn_buffer_setup_ops); 46 } 47 48 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); 49 MODULE_DESCRIPTION("STMicroelectronics magnetometers buffer"); 50 MODULE_LICENSE("GPL v2"); 51