From 9098682200e6cca4b776638a51200dafa16f50fb Mon Sep 17 00:00:00 2001
From: Haibo Chen <haibo.chen@nxp.com>
Date: Tue, 22 Sep 2020 18:11:43 +0800
Subject: [PATCH] mmc: fsl_esdhc_imx: remove the 1ms delay before sending
command
This 1ms delay before sending command already exist from the beginning
of the fsl_esdhc driver added in year 2008. Now this driver has been
split for two files: fsl_esdhc.c and fsl_esdhc_imx.c. fsl_esdhc_imx.c
only for i.MX series. i.MX series esdhc/usdhc do not need this 1ms delay
before sending any command. So remove this 1ms, this will save a lot
time if handling a large mmc data.
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
---
drivers/mmc/fsl_esdhc_imx.c | 7 -------
1 file changed, 7 deletions(-)
diff --git a/drivers/mmc/fsl_esdhc_imx.c b/drivers/mmc/fsl_esdhc_imx.c
index 0c866b168f..caaef0b7da 100644
--- a/drivers/mmc/fsl_esdhc_imx.c
+++ b/drivers/mmc/fsl_esdhc_imx.c
@@ -462,13 +462,6 @@ static int esdhc_send_cmd_common(struct fsl_esdhc_priv *priv, struct mmc *mmc,
while (esdhc_read32(®s->prsstat) & PRSSTAT_DLA)
;
- /* Wait at least 8 SD clock cycles before the next command */
- /*
- * Note: This is way more than 8 cycles, but 1ms seems to
- * resolve timing issues with some cards
- */
- udelay(1000);
-
/* Set up for a data transfer if we have one */
if (data) {
err = esdhc_setup_data(priv, mmc, data);
--
2.39.5