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.Zhang@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
What's the change since v1? You missed change log.
York