From: Peter Ujfalusi Date: Fri, 16 Oct 2015 07:18:04 +0000 (+0300) Subject: dmaengine: edma: Get qDMA channel information from HW also X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=633e42b8c5465acf03671be7bd2866c486816596;p=linux-beck.git dmaengine: edma: Get qDMA channel information from HW also Query the number of qDMA channels from CCCFG register. Signed-off-by: Peter Ujfalusi Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index eaf1f9e4bde0..ea851ab05c8e 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -107,6 +107,7 @@ /* CCCFG register */ #define GET_NUM_DMACH(x) (x & 0x7) /* bits 0-2 */ +#define GET_NUM_QDMACH(x) (x & 0x70 >> 4) /* bits 4-6 */ #define GET_NUM_PAENTRY(x) ((x & 0x7000) >> 12) /* bits 12-14 */ #define GET_NUM_EVQUE(x) ((x & 0x70000) >> 16) /* bits 16-18 */ #define GET_NUM_REGN(x) ((x & 0x300000) >> 20) /* bits 20-21 */ @@ -220,6 +221,7 @@ struct edma_cc { /* eDMA3 resource information */ unsigned num_channels; + unsigned num_qchannels; unsigned num_region; unsigned num_slots; unsigned num_tc; @@ -1819,6 +1821,9 @@ static int edma_setup_from_hw(struct device *dev, struct edma_soc_info *pdata, value = GET_NUM_DMACH(cccfg); ecc->num_channels = BIT(value + 1); + value = GET_NUM_QDMACH(cccfg); + ecc->num_qchannels = value * 2; + value = GET_NUM_PAENTRY(cccfg); ecc->num_slots = BIT(value + 4); @@ -1830,6 +1835,7 @@ static int edma_setup_from_hw(struct device *dev, struct edma_soc_info *pdata, dev_dbg(dev, "eDMA3 CC HW configuration (cccfg: 0x%08x):\n", cccfg); dev_dbg(dev, "num_region: %u\n", ecc->num_region); dev_dbg(dev, "num_channels: %u\n", ecc->num_channels); + dev_dbg(dev, "num_qchannels: %u\n", ecc->num_qchannels); dev_dbg(dev, "num_slots: %u\n", ecc->num_slots); dev_dbg(dev, "num_tc: %u\n", ecc->num_tc); dev_dbg(dev, "chmap_exist: %s\n", ecc->chmap_exist ? "yes" : "no");