tree 5925e5f7cbbcc63e89d40674300b635936d1b94a
parent ec93af0dec4c9f17cefadd24d54edf5c5b91bc8d
author Zhuoyu Zhang <Zhuoyu.Zhang@freescale.com> 1439808912 +0800
committer York Sun <yorksun@freescale.com> 1441162160 -0500

arm/ls102xa:add hwconfig setting to support disable unused devices

DEVDISRn registers provides a mechanism for gating clocks of IP blocks
that are not used. Here we implement hwconfig option to allow users
to disable unused peripherals on the board.

For ex. If eSDHC/qDMA/eDMA are unused and with disabled status in dts,
User can enable CONFIG_FSL_DEVICE_DISABLE and set "devdis:esdhc,qdma,edma"
in hwconfig, thus ESDHC controller & eDMA/qDMA will be clock gated to
save more power.

Signed-off-by: Zhuoyu Zhang <Zhuoyu.Zhang@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>