d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Driver for the High Speed UART DMA
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*
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* Copyright (C) 2015 Intel Corporation
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*/
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#ifndef _DMA_HSU_H
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#define _DMA_HSU_H
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/platform_data/dma-hsu.h>
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struct hsu_dma;
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/**
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* struct hsu_dma_chip - representation of HSU DMA hardware
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* @dev: struct device of the DMA controller
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* @irq: irq line
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* @regs: memory mapped I/O space
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* @length: I/O space length
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* @offset: offset of the I/O space where registers are located
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* @hsu: struct hsu_dma that is filed by ->probe()
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* @pdata: platform data for the DMA controller if provided
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*/
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struct hsu_dma_chip {
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struct device *dev;
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int irq;
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void __iomem *regs;
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unsigned int length;
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unsigned int offset;
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struct hsu_dma *hsu;
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};
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#if IS_ENABLED(CONFIG_HSU_DMA)
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/* Export to the internal users */
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int hsu_dma_get_status(struct hsu_dma_chip *chip, unsigned short nr,
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u32 *status);
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int hsu_dma_do_irq(struct hsu_dma_chip *chip, unsigned short nr, u32 status);
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/* Export to the platform drivers */
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int hsu_dma_probe(struct hsu_dma_chip *chip);
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int hsu_dma_remove(struct hsu_dma_chip *chip);
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#else
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static inline int hsu_dma_get_status(struct hsu_dma_chip *chip,
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unsigned short nr, u32 *status)
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{
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return 0;
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}
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static inline int hsu_dma_do_irq(struct hsu_dma_chip *chip, unsigned short nr,
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u32 status)
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{
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return 0;
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}
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static inline int hsu_dma_probe(struct hsu_dma_chip *chip) { return -ENODEV; }
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static inline int hsu_dma_remove(struct hsu_dma_chip *chip) { return 0; }
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#endif /* CONFIG_HSU_DMA */
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#endif /* _DMA_HSU_H */
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