89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
/*
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* Copyright (c) 2015 Intel Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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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_PCAL9535A_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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#ifdef __cplusplus
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extern "C" {
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#endif
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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 0 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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uint8_t stride[2];
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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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uint8_t stride[2];
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};
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#ifdef __cplusplus
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}
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#endif
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#endif /* _GPIO_PCAL9535A_H_ */
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