cd2fcf5252
Most tools used for compliance and SBOM generation use SPDX identifiers This change brings us a step closer to an easy SBOM generation. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
160 lines
5.3 KiB
C
160 lines
5.3 KiB
C
/****************************************************************************
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* include/nuttx/input/max11802.h
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/* References:
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* "Low-Power, Ultra-Small Resistive Touch-Screen Controllers
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* with I2C/SPI Interface" Maxim IC, Rev 3, 10/2010
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*/
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#ifndef __INCLUDE_NUTTX_INPUT_MAX11802_H
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#define __INCLUDE_NUTTX_INPUT_MAX11802_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/spi/spi.h>
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#include <stdbool.h>
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#include <nuttx/irq.h>
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#if defined(CONFIG_INPUT) && defined(CONFIG_INPUT_MAX11802)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* SPI Frequency. Default: 100KHz */
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#ifndef CONFIG_MAX11802_FREQUENCY
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# define CONFIG_MAX11802_FREQUENCY 100000
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#endif
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/* Maximum number of threads than can be waiting for POLL events */
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#ifndef CONFIG_MAX11802_NPOLLWAITERS
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# define CONFIG_MAX11802_NPOLLWAITERS 2
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#endif
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#ifndef CONFIG_MAX11802_SPIMODE
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# define CONFIG_MAX11802_SPIMODE SPIDEV_MODE0
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#endif
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/* Thresholds */
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#ifndef CONFIG_MAX11802_THRESHX
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# define CONFIG_MAX11802_THRESHX 12
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#endif
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#ifndef CONFIG_MAX11802_THRESHY
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# define CONFIG_MAX11802_THRESHY 12
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#endif
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/* Check for some required settings. This can save the user a lot of time
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* in getting the right configuration.
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*/
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#ifndef CONFIG_SCHED_WORKQUEUE
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# error "Work queue support required. CONFIG_SCHED_WORKQUEUE must be selected."
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#endif
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* A reference to a structure of this type must be passed to the MAX11802
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* driver. This structure provides information about the configuration
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* of the MAX11802 and provides some board-specific hooks.
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*
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* Memory for this structure is provided by the caller. It is not copied
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* by the driver and is presumed to persist while the driver is active. The
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* memory must be writeable because, under certain circumstances, the driver
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* may modify frequency or X plate resistance values.
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*/
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struct max11802_config_s
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{
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/* Device characterization */
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uint32_t frequency; /* SPI frequency */
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/* IRQ/GPIO access callbacks. These operations all hidden behind
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* callbacks to isolate the MAX11802 driver from differences in GPIO
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* interrupt handling by varying boards and MCUs. If possible,
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* interrupts should be configured on both rising and falling edges
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* so that contact and loss-of-contact events can be detected.
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*
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* attach - Attach the MAX11802 interrupt handler to the GPIO interrupt
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* enable - Enable or disable the GPIO interrupt
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* clear - Acknowledge/clear any pending GPIO interrupt
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* pendown - Return the state of the pen down GPIO input
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*/
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int (*attach)(FAR struct max11802_config_s *state, xcpt_t isr);
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void (*enable)(FAR struct max11802_config_s *state, bool enable);
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void (*clear)(FAR struct max11802_config_s *state);
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bool (*pendown)(FAR struct max11802_config_s *state);
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Name: max11802_register
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*
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* Description:
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* Configure the MAX11802 to use the provided SPI device instance. This
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* will register the driver as /dev/inputN where N is the minor device
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* number
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*
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* Input Parameters:
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* spi - An SPI driver instance
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* config - Persistent board configuration data
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* minor - The input device minor number
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*
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* Returned Value:
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* Zero is returned on success. Otherwise, a negated errno value is
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* returned to indicate the nature of the failure.
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*
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****************************************************************************/
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int max11802_register(FAR struct spi_dev_s *spi,
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FAR struct max11802_config_s *config, int minor);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* CONFIG_INPUT && CONFIG_INPUT_MAX11802 */
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#endif /* __INCLUDE_NUTTX_INPUT_MAX11802_H */
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