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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364/* SPDX-License-Identifier: GPL-2.0-only *//* * Driver for the High Speed UART DMA * * Copyright (C) 2015 Intel Corporation */
#ifndef _DMA_HSU_H#define _DMA_HSU_H
#include <linux/errno.h>#include <linux/kconfig.h>#include <linux/types.h>
#include <linux/platform_data/dma-hsu.h>
struct device;struct hsu_dma;
/** * struct hsu_dma_chip - representation of HSU DMA hardware * @dev: struct device of the DMA controller * @irq: irq line * @regs: memory mapped I/O space * @length: I/O space length * @offset: offset of the I/O space where registers are located * @hsu: struct hsu_dma that is filed by ->probe() * @pdata: platform data for the DMA controller if provided */struct hsu_dma_chip { struct device *dev; int irq; void __iomem *regs; unsigned int length; unsigned int offset; struct hsu_dma *hsu;};
#if IS_ENABLED(CONFIG_HSU_DMA)/* Export to the internal users */int hsu_dma_get_status(struct hsu_dma_chip *chip, unsigned short nr, u32 *status);int hsu_dma_do_irq(struct hsu_dma_chip *chip, unsigned short nr, u32 status);
/* Export to the platform drivers */int hsu_dma_probe(struct hsu_dma_chip *chip);int hsu_dma_remove(struct hsu_dma_chip *chip);#elsestatic inline int hsu_dma_get_status(struct hsu_dma_chip *chip, unsigned short nr, u32 *status){ return 0;}static inline int hsu_dma_do_irq(struct hsu_dma_chip *chip, unsigned short nr, u32 status){ return 0;}static inline int hsu_dma_probe(struct hsu_dma_chip *chip) { return -ENODEV; }static inline int hsu_dma_remove(struct hsu_dma_chip *chip) { return 0; }#endif /* CONFIG_HSU_DMA */
#endif /* _DMA_HSU_H */