tmio_mmc / PM: Use PM QoS latency constraint

Make tmio_mmc call dev_pm_qos_expose_latency_limit() to expose
the PM QoS latency limit to user space and specify the initial
value of it as 100 microseconds.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index abad01b37cfb..fc3eb1a7fe24 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -39,6 +39,7 @@
 #include <linux/module.h>
 #include <linux/pagemap.h>
 #include <linux/platform_device.h>
+#include <linux/pm_qos.h>
 #include <linux/pm_runtime.h>
 #include <linux/scatterlist.h>
 #include <linux/workqueue.h>
@@ -951,6 +952,8 @@ int __devinit tmio_mmc_host_probe(struct tmio_mmc_host **host,
 
         mmc_add_host(mmc);
 
+        dev_pm_qos_expose_latency_limit(&pdev->dev, 100);
+
         /* Unmask the IRQs we want to know about */
         if (!_host->chan_rx)
                 irq_mask |= TMIO_MASK_READOP;
@@ -989,6 +992,8 @@ void tmio_mmc_host_remove(struct tmio_mmc_host *host)
                 || host->mmc->caps & MMC_CAP_NONREMOVABLE)
                 pm_runtime_get_sync(&pdev->dev);
 
+        dev_pm_qos_hide_latency_limit(&pdev->dev);
+
         mmc_remove_host(host->mmc);
         cancel_work_sync(&host->done);
         cancel_delayed_work_sync(&host->delayed_reset_work);