[PATCH V7 02/15] mmc: core: Enable / disable re-tuning

[Adrian Hunter <adrian.hunter@intel.com>]

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>
---


Changes in V7:


	Also flag re-tune needed in SDIO 'keep_power'
	case, when a re-tuning timer is being used.


 drivers/mmc/core/core.c | 4 ++++
 drivers/mmc/core/sdio.c | 6 +++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 92e7671..007c444 100644
--- 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 5bc6c7d..16e1f39 100644
--- 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;
 }
-- 
1.9.1