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dma: stm32: implement get_status api

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get_status api is not implemented in stm32 dma driver
but it will be used by others like async uart driver.

Signed-off-by: Jun Li <jun.r.li@intel.com>
This commit is contained in:
Jun Li 2020-05-20 09:33:29 -07:00 committed by Maureen Helm
parent afc1b9de13
commit 486dab02ec
1 changed files with 23 additions and 0 deletions
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23
drivers/dma/dma_stm32.c
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@ -620,11 +620,34 @@ static int dma_stm32_init(struct device *dev)
return 0;
}
static int dma_stm32_get_status(struct device *dev, uint32_t id,
struct dma_status *stat)
{
const struct dma_stm32_config *config = dev->config_info;
DMA_TypeDef *dma = (DMA_TypeDef *)(config->base);
struct dma_stm32_data *data = dev->driver_data;
struct dma_stm32_stream *stream;
/* give channel from index 0 */
id = id - STREAM_OFFSET;
if (id >= data->max_streams) {
return -EINVAL;
}
stream = &data->streams[id];
stat->pending_length = LL_DMA_GetDataLength(dma, table_ll_stream[id]);
stat->dir = stream->direction;
stat->busy = stream->busy;
return 0;
}
static const struct dma_driver_api dma_funcs = {
.reload = dma_stm32_reload,
.config = dma_stm32_configure,
.start = dma_stm32_start,
.stop = dma_stm32_stop,
.get_status = dma_stm32_get_status,
};
#define DMA_INIT(index) \