This parameter "st,phy-cal" becomes optional and when it is
absent the built-in PHY calibration is done.
It is the case in the helper dtsi file "stm32mp15-ddr.dtsi"
except if DDR_PHY_CAL_SKIP is defined.
This patch also impact the ddr interactive mode
- the registers of the param 'phy.cal' are initialized to 0 when
"st,phy-cal" is not present in device tree (default behavior when
DDR_PHY_CAL_SKIP is not activated)
- the info 'cal' field can be use to change the calibration behavior
- cal=1 => use param phy.cal to initialize the PHY, built-in training
is skipped
- cal=0 => param phy.cal is absent, built-in training is used (default)
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Device Tree Bindings Staging Area
=================================
This directory contains device tree bindings for U-Boot.
These follow along with Linux kernel bindings, with a few additions. By
adding the files here, U-Boot patches can clearly show thees additions.
This makes it easier for device tree people to review these additions in
patches sent to the U-Boot mailing list.
The intent IS to commit these files to U-Boot. Hopefully at some point
the files will be stored in another repo (shared with Linux) which is
brought in as needed. Changes here are intended to mirror changes in the
Linux Documentation/devicetree/bindings/ directory.
sjg@chromium.org
17-Jan-12