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66 lines
2.7 KiB
C
66 lines
2.7 KiB
C
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/*
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* Copyright (C) 2015, Intel Corporation. All rights reserved.
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* 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
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef CPU_X86_DRIVERS_GPIO_PCAL9535A_H_
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#define CPU_X86_DRIVERS_GPIO_PCAL9535A_H_
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#include <stdint.h>
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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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struct gpio_pcal9535a_data {
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uint16_t i2c_slave_addr;
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uint32_t out_pol_inv;
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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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int gpio_pcal9535a_init(struct gpio_pcal9535a_data *data, uint16_t i2c_slave_addr);
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int gpio_pcal9535a_config(struct gpio_pcal9535a_data *data, uint32_t pin, int flags);
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int gpio_pcal9535a_read(struct gpio_pcal9535a_data *data, uint32_t pin, uint32_t *value);
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int gpio_pcal9535a_write(struct gpio_pcal9535a_data *data, uint32_t pin, uint32_t value);
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int gpio_pcal9535a_config_port(struct gpio_pcal9535a_data *data, uint32_t pin, int flags);
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int gpio_pcal9535a_read_port(struct gpio_pcal9535a_data *data, uint32_t pin, uint32_t *value);
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int gpio_pcal9535a_write_port(struct gpio_pcal9535a_data *data, uint32_t pin, uint32_t value);
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#endif /* CPU_X86_DRIVERS_GPIO_PCAL9535A_H_ */
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