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lib
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modules
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4.4.0-1128-aws
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include
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linux
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dma
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Filename :
hsu.h
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/* * Driver for the High Speed UART DMA * * Copyright (C) 2015 Intel Corporation * * 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. */ #ifndef _DMA_HSU_H #define _DMA_HSU_H #include <linux/device.h> #include <linux/interrupt.h> #include <linux/platform_data/dma-hsu.h> 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 */ irqreturn_t hsu_dma_irq(struct hsu_dma_chip *chip, unsigned short nr); /* Export to the platform drivers */ int hsu_dma_probe(struct hsu_dma_chip *chip); int hsu_dma_remove(struct hsu_dma_chip *chip); #else static inline irqreturn_t hsu_dma_irq(struct hsu_dma_chip *chip, unsigned short nr) { return IRQ_NONE; } 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 */