tree edda2395cb9cf47b9271871480279bc001f5177f
parent 6e89c48d0b24257e104292bdd8ea2c1ee5f3bf60
author Haibo Chen <haibo.chen@freescale.com> 1425033330 +0800
committer Nitin Garg <nitin.garg@freescale.com> 1442499713 -0500

MLK-10237-4 mmc: sdhci-esdhc-imx: add tuning-step setting support

tuning-step is the delay cell steps in tuning procedure. This patch
add the tuning-step setting in driver, so that user can set the
tuning-step value in dts.

e.g.
tuning-step = <2>;

this example set the tuning-step as value 2.

This patch also set the tuning-step of i.MX7D as 2, so that the tuning
procedure can execute successfully.

Signed-off-by: Haibo Chen <haibo.chen@freescale.com>