ath6kl: Workaround to support Deep Sleep with MSM.

Set the host pm flag MMC_PM_WAKE_SDIO_IRQ to allow host
to disable the sdc2_clk and sdc2_h_clk,so that the MSM device
enter into TCXO shutdown.

Signed-off-by: Santosh Sajjan <ssajjan@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath6kl/sdio.c b/drivers/net/wireless/ath/ath6kl/sdio.c
index 07dcf00ca1a..4febee72349 100644
--- a/drivers/net/wireless/ath/ath6kl/sdio.c
+++ b/drivers/net/wireless/ath/ath6kl/sdio.c
@@ -856,6 +856,19 @@ static int ath6kl_sdio_suspend(struct ath6kl *ar, struct cfg80211_wowlan *wow)
                 if (ret)
                         goto cut_pwr;
 
+                /*
+                 * Workaround to support Deep Sleep with MSM, set the host pm
+                 * flag as MMC_PM_WAKE_SDIO_IRQ to allow SDCC deiver to disable
+                 * the sdc2_clock and internally allows MSM to enter
+                 * TCXO shutdown properly.
+                 */
+                if ((flags & MMC_PM_WAKE_SDIO_IRQ)) {
+                        ret = sdio_set_host_pm_flags(func,
+                                                MMC_PM_WAKE_SDIO_IRQ);
+                        if (ret)
+                                goto cut_pwr;
+                }
+
                 ret = ath6kl_cfg80211_suspend(ar, ATH6KL_CFG_SUSPEND_DEEPSLEEP,
                                               NULL);
                 if (ret)