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dt-bindings: add support for parsing stm32 dma consumer cells

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Add support for parsing stm32 dma consumer cells, format of which
follows dma dts format declared in the Linux Kernel for the dma of
stm32:
https://git.kernel.org/pub/scm/linux/kernel/git/devicetree/devicetree-rebasing.git/plain/Bindings/dma/stm32-dma.txt

Signed-off-by: Song Qiang <songqiang1304521@gmail.com>
This commit is contained in:
Song Qiang 2019-10-24 12:29:47 +08:00 • committed by Kumar Gala
commit 8fa9fecd8c
3 changed files with 48 additions and 0 deletions
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13
include/dt-bindings/dma/stm32_dma.h Normal file
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/*
* Copyright (c) 2019 Song Qiang <songqiang1304521@gmail.com>
*
* SPDX-License-Identifier: Apache-2.0
*/
/* macros for channel-config */
#define STM32_DMA_CONFIG_PERIPH_ADDR_INC(config) (config & 0x1 << 9)
#define STM32_DMA_CONFIG_MEM_ADDR_INC(config) (config & 0x1 << 10)
#define STM32_DMA_CONFIG_PERIPH_INC_FIXED(config) (config & 0x1 << 15)
#define STM32_DMA_CONFIG_PRIORITY(config) ((config >> 16) & 0x3)
/* macros for features */
#define STM32_DMA_FEATURES_FIFO_THRESHOLD(features) (features & 0x3)