91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/*
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* Copyright (c) 2015 Intel Corporation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @file Header file for the PCAL9535A driver.
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*/
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#ifndef _GPIO_PCAL9353A_H_
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#define _GPIO_PCAL9535A_H_
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#include <nanokernel.h>
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#include <gpio.h>
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#include <i2c.h>
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/**
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* @brief Initialization function for PCAL9535A
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*
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* @param dev Device struct
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* @return DEV_OK if successful, failed otherwise
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*/
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extern int gpio_pcal9535a_init(struct device *dev);
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/** Configuration data */
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struct gpio_pcal9535a_config {
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/** The master I2C device's name */
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const char * const i2c_master_dev_name;
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/** The slave address of the chip */
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uint16_t i2c_slave_addr;
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};
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/** Store the port 0/1 data for each register pair. */
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union gpio_pcal9535a_port_data {
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uint16_t all;
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uint8_t port[2];
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uint8_t byte[2];
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};
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/** Runtime driver data */
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struct gpio_pcal9535a_drv_data {
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/** Master I2C device */
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struct device *i2c_master;
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/**
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* Specify polarity inversion of pin. This is used for ouput as
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* the polarity inversion registers on chip affects inputs only.
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*/
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uint32_t out_pol_inv;
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/** Use for delay between operations */
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struct nano_timer timer;
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struct {
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union gpio_pcal9535a_port_data output;
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union gpio_pcal9535a_port_data pol_inv;
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union gpio_pcal9535a_port_data dir;
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union gpio_pcal9535a_port_data pud_en;
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union gpio_pcal9535a_port_data pud_sel;
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} reg_cache;
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};
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#endif /* _GPIO_PCAL9535A_H_ */
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