On 19-07-21, 10:25, Biju Das wrote:
> +struct rz_dmac_chan {
> + struct virt_dma_chan vc;
> + void __iomem *ch_base;
> + void __iomem *ch_cmn_base;
> + unsigned int index;
> + int irq;
> + struct rz_dmac_desc *desc;
> + int descs_allocated;
> +
> + enum dma_slave_buswidth src_word_size;
> + enum dma_slave_buswidth dst_word_size;
> + dma_addr_t src_per_address;
> + dma_addr_t dst_per_address;
> +
> + u32 chcfg;
> + u32 chctrl;
> + int mid_rid;
> +
> + struct list_head ld_free;
> + struct list_head ld_queue;
> + struct list_head ld_active;
> +
> + struct {
> + struct rz_lmdesc *base;
> + struct rz_lmdesc *head;
> + struct rz_lmdesc *tail;
> + int valid;
> + dma_addr_t base_dma;
> + } lmdesc;
should this be not part of rz_dmac_desc than channel?
> +static int rz_dmac_config(struct dma_chan *chan,
> + struct dma_slave_config *config)
> +{
> + struct rz_dmac_chan *channel = to_rz_dmac_chan(chan);
> + u32 *ch_cfg;
> +
> + channel->src_per_address = config->src_addr;
> + channel->src_word_size = config->src_addr_width;
> + channel->dst_per_address = config->dst_addr;
> + channel->dst_word_size = config->dst_addr_width;
> +
> + if (config->peripheral_config) {
> + ch_cfg = config->peripheral_config;
> + channel->chcfg = *ch_cfg;
> + }
can you explain what this the ch_cfg here and what does it represent?
--
~Vinod
