On 08/14/2015 02:53 AM, Zhuoyu Zhang wrote: > 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.zh...@freescale.com> > --- > arch/arm/include/asm/arch-ls102xa/ls102xa_devdis.h | 52 > ++++++++++++++++++++++ > board/freescale/ls1021aqds/ls1021aqds.c | 5 +++ > board/freescale/ls1021atwr/ls1021atwr.c | 5 +++ > drivers/misc/Makefile | 1 + > drivers/misc/fsl_devdis.c | 29 ++++++++++++ > include/configs/ls1021aqds.h | 4 +- > include/configs/ls1021atwr.h | 4 +- > include/fsl_devdis.h | 18 ++++++++ > 8 files changed, 116 insertions(+), 2 deletions(-) > create mode 100644 arch/arm/include/asm/arch-ls102xa/ls102xa_devdis.h > create mode 100644 drivers/misc/fsl_devdis.c > create mode 100644 include/fsl_devdis.h >
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