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| author | Haibo Chen <haibo.chen@nxp.com> | 2020-09-22 18:11:43 +0800 |
|---|---|---|
| committer | Peng Fan <peng.fan@nxp.com> | 2020-10-12 15:48:13 +0800 |
| commit | 9098682200e6cca4b776638a51200dafa16f50fb (patch) | |
| tree | 5f33047cedc3da21ec74d0a78cbfbbdb770e066a | |
| parent | ef5ab0d13a7a44469f6c765c8acc8d54c23213de (diff) | |
| download | u-boot-9098682200e6cca4b776638a51200dafa16f50fb.tar.gz u-boot-9098682200e6cca4b776638a51200dafa16f50fb.tar.xz u-boot-9098682200e6cca4b776638a51200dafa16f50fb.zip | |
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>
| -rw-r--r-- | drivers/mmc/fsl_esdhc_imx.c | 7 |
1 files changed, 0 insertions, 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); |