ARM: edma: Fix configuration parsing for SoCs with multiple eDMA3 CC

The edma_setup_from_hw() should know about the CC number when parsing the
CCCFG register - when it reads the register to be precise. The base
addresses for CCs stored in an array and we need to provide the correct id
to edma_read() in order to read the correct register.

Cc: <stable@vger.kernel.org> # 3.16
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c
index 88099175fc56c64be13c5a31e5cf05ed18b60e50..d86771abbf57a3760e65c4718a4fbfc6bad8359b 100644 (file)
--- a/arch/arm/common/edma.c
+++ b/arch/arm/common/edma.c
@@ -1443,14 +1443,14 @@ void edma_assign_channel_eventq(unsigned channel, enum dma_event_q eventq_no)
 EXPORT_SYMBOL(edma_assign_channel_eventq);
 
 static int edma_setup_from_hw(struct device *dev, struct edma_soc_info *pdata,
-                             struct edma *edma_cc)
+                             struct edma *edma_cc, int cc_id)
 {
        int i;
        u32 value, cccfg;
        s8 (*queue_priority_map)[2];
 
        /* Decode the eDMA3 configuration from CCCFG register */
-       cccfg = edma_read(0, EDMA_CCCFG);
+       cccfg = edma_read(cc_id, EDMA_CCCFG);
 
        value = GET_NUM_REGN(cccfg);
        edma_cc->num_region = BIT(value);
@@ -1464,7 +1464,8 @@ static int edma_setup_from_hw(struct device *dev, struct edma_soc_info *pdata,
        value = GET_NUM_EVQUE(cccfg);
        edma_cc->num_tc = value + 1;
 
-       dev_dbg(dev, "eDMA3 HW configuration (cccfg: 0x%08x):\n", cccfg);
+       dev_dbg(dev, "eDMA3 CC%d HW configuration (cccfg: 0x%08x):\n", cc_id,
+               cccfg);
        dev_dbg(dev, "num_region: %u\n", edma_cc->num_region);
        dev_dbg(dev, "num_channel: %u\n", edma_cc->num_channels);
        dev_dbg(dev, "num_slot: %u\n", edma_cc->num_slots);
@@ -1684,7 +1685,7 @@ static int edma_probe(struct platform_device *pdev)
                        return -ENOMEM;
 
                /* Get eDMA3 configuration from IP */
-               ret = edma_setup_from_hw(dev, info[j], edma_cc[j]);
+               ret = edma_setup_from_hw(dev, info[j], edma_cc[j], j);
                if (ret)
                        return ret;