OMAP4: EMIF: code cleanup and clarification

Removed unused fields of emif_regs structure and
functions that initialize or change them.

Also changed few names of emif_regs members
to match register names.

This made the code easier to understand and read
as well as made it a little bit faster

Change-Id: I0485a01b7f03e922b5a2e69bfb03c2ed941fcf3b
Signed-off-by: Ruslan Bilovol <ruslan.bilovol@ti.com>
OMAP4430/60: EMIF: errata: Prohibit usage of Power-Down mode

A ZQ calibration long command is issued every time on exit
from active power-down and precharge power-down modes
when EMIF is configured to use Power-down mode
(EMIF_PWR_MGMT_CTRL.REG_LP_MODE=0x4).

Due to very short periods of power-down cycles, ZQ calibration
overhead creates bandwidth issues and increases overall system
power consumption.

As result, the guideline is to not allow Power-down mode and,
therefore, to not have set the
EMIF_PWR_MGMT_CTRL[10:8] REG_LP_MODE bit field to 0x4.

TI Errata i743; IMPACTED: OMAP4430/60 all revisions

Change-Id: Ib82f28e6e0c6c046ea277b90a78dc82c1ee82417
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Vitaly Chernooky <vitaly.chernooky@ti.com>
OMAP4: EMIF: LPDDR interface configuration update

In latest TRMs for OMAP4 family LPDDR recommended
setting have been changed. This patch does
corresponding changes in the code.

Change-Id: Ibd81b8196db74df5a7c3e29788c72a7b3628a22c
Signed-off-by: Ruslan Bilovol <ruslan.bilovol@ti.com>
Revert "remoteproc: add mutex protection for traces"

This reverts commit 565e03c393854495e814342eb3138e21a3de2604.

Conflicts:
	drivers/remoteproc/remoteproc.c
Revert "rpmsg: resmgr: use absolute inputs for auxclk rates"

This reverts commit ea4b460f0088342363b11060dead96d96b4fb507.