From 52cfa2d4a32ddd6f548e12c5cf9c339cd49975c2 Mon Sep 17 00:00:00 2001 From: anjianjun Date: Wed, 28 Jul 2021 14:14:09 +0800 Subject: [PATCH] drivers/mmcsd:Send cmd0 just once for Increased compatibility Signed-off-by: anjianjun Change-Id: Ic2372c677af250b6268e6d29e823e50713ea138c --- drivers/mmcsd/mmcsd_sdio.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/mmcsd/mmcsd_sdio.c b/drivers/mmcsd/mmcsd_sdio.c index a94a526fcc5..130627c85fd 100644 --- a/drivers/mmcsd/mmcsd_sdio.c +++ b/drivers/mmcsd/mmcsd_sdio.c @@ -3096,9 +3096,8 @@ static int mmcsd_cardidentify(FAR struct mmcsd_state_s *priv) up_udelay(MMCSD_POWERUP_DELAY); - /* Then send CMD0 (twice just to be sure) */ + /* Then send CMD0 just once is standard procedure */ - mmcsd_sendcmdpoll(priv, MMCSD_CMD0, 0); mmcsd_sendcmdpoll(priv, MMCSD_CMD0, 0); up_udelay(MMCSD_IDLE_DELAY);