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84 lines
2.0 KiB
84 lines
2.0 KiB
/* |
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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 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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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* _GPIO_PCAL9535A_H_ */
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