65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/*
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* Copyright (c) 2016 Linaro Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef _GPIO_MMIO32_H_
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#define _GPIO_MMIO32_H_
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#include <device.h>
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#include <gpio.h>
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#include <zephyr/types.h>
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struct gpio_mmio32_config {
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volatile u32_t *reg;
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u32_t mask;
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};
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struct gpio_mmio32_context {
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const struct gpio_mmio32_config *config;
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u32_t invert; /* Mask of 'reg' bits that should be inverted */
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};
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int gpio_mmio32_init(struct device *dev);
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#ifdef CONFIG_GPIO_MMIO32
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/**
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* Create a device object for accessing a simple 32-bit i/o register using the
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* same APIs as GPIO drivers.
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*
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* @param _dev_name Device name.
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* @param _drv_name The name this instance of the driver exposes to the system.
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* @param _address The address of the 32-bit i/o register the device will
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* provide access to.
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* @param _mask Mask of bits in the register that it is valid to access.
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* E.g. 0xffffffffu to allow access to all of them.
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*
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* @see DEVICE_INIT
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*/
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#define GPIO_MMIO32_INIT(_dev_name, _drv_name, _address, _mask) \
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\
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static struct gpio_mmio32_context _dev_name##_dev_data; \
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\
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static const struct gpio_mmio32_config _dev_name##_dev_cfg = { \
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.reg = (volatile u32_t *)_address, \
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.mask = _mask, \
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}; \
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\
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DEVICE_INIT(_dev_name, _drv_name, \
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&gpio_mmio32_init, \
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&_dev_name##_dev_data, \
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&_dev_name##_dev_cfg, \
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PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE)
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#else /* CONFIG_GPIO_MMIO32 */
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/* Null definition for when support not configured into kernel */
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#define GPIO_MMIO32_INIT(_dev_name, _drv_name, _address, _mask)
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#endif
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#endif /* _GPIO_MMIO32_H_ */
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