mmc: core: Enable / disable re-tuning

Enable re-tuning when tuning is executed and
disable re-tuning when card is no longer initialized.

In the case of SDIO suspend, the card can keep power.
In that case, re-tuning need not be disabled, but, if
a re-tuning timer is being used, ensure it is disabled
and assume that re-tuning will be needed upon resume
since it is not known how long the suspend will last.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 92e7671..007c444 100644 (file)
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1109,6 +1109,8 @@ int mmc_execute_tuning(struct mmc_card *card)
 
        if (err)
                pr_err("%s: tuning execution failed\n", mmc_hostname(host));
+       else
+               mmc_retune_enable(host);
 
        return err;
 }
@@ -1140,6 +1142,8 @@ void mmc_set_bus_width(struct mmc_host *host, unsigned int width)
  */
 void mmc_set_initial_state(struct mmc_host *host)
 {
+       mmc_retune_disable(host);
+
        if (mmc_host_is_spi(host))
                host->ios.chip_select = MMC_CS_HIGH;
        else

diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index f6c28a7..5c1423a 100644 (file)
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -934,8 +934,12 @@ static int mmc_sdio_suspend(struct mmc_host *host)
                mmc_release_host(host);
        }
 
-       if (!mmc_card_keep_power(host))
+       if (!mmc_card_keep_power(host)) {
                mmc_power_off(host);
+       } else if (host->retune_period) {
+               mmc_retune_timer_stop(host);
+               mmc_retune_needed(host);
+       }
 
        return 0;
 }