dma: cpp41: enable pm_runtime during init

With enabled pm_runtime in the kernel the device won't work because it
is not "on" during the probe function. This patch enables the device via
pm_runtime on probe so it remains activated.

Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/dma/cppi41.c b/drivers/dma/cppi41.c
index e69617889953ec2c05b844e3d5019f3fe8adf584..6c4e64f2f3e76858f9148a79b5f1c69540a412b7 100644 (file)
--- a/drivers/dma/cppi41.c
+++ b/drivers/dma/cppi41.c
@@ -9,6 +9,7 @@
 #include <linux/dmapool.h>
 #include <linux/interrupt.h>
 #include <linux/of_address.h>
+#include <linux/pm_runtime.h>
 #include "dmaengine.h"
 
 #define DESC_TYPE      27
@@ -960,6 +961,11 @@ static int cppi41_dma_probe(struct platform_device *pdev)
                goto err_remap;
        }
 
+       pm_runtime_enable(&pdev->dev);
+       ret = pm_runtime_get_sync(&pdev->dev);
+       if (ret)
+               goto err_get_sync;
+
        cdd->queues_rx = glue_info->queues_rx;
        cdd->queues_tx = glue_info->queues_tx;
        cdd->td_queue = glue_info->td_queue;
@@ -1005,6 +1011,9 @@ err_irq:
 err_chans:
        deinit_cpii41(pdev, cdd);
 err_init_cppi:
+       pm_runtime_put(&pdev->dev);
+err_get_sync:
+       pm_runtime_disable(&pdev->dev);
        iounmap(cdd->usbss_mem);
        iounmap(cdd->ctrl_mem);
        iounmap(cdd->sched_mem);
@@ -1029,6 +1038,8 @@ static int cppi41_dma_remove(struct platform_device *pdev)
        iounmap(cdd->ctrl_mem);
        iounmap(cdd->sched_mem);
        iounmap(cdd->qmgr_mem);
+       pm_runtime_put(&pdev->dev);
+       pm_runtime_disable(&pdev->dev);
        kfree(cdd);
        return 0;
 }