From 03c22449c5b7daff0a43291b34564a52660b83b8 Mon Sep 17 00:00:00 2001 From: Zhuoyu Zhang Date: Mon, 17 Aug 2015 18:55:12 +0800 Subject: 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 Reviewed-by: York Sun --- include/fsl_devdis.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 include/fsl_devdis.h (limited to 'include/fsl_devdis.h') diff --git a/include/fsl_devdis.h b/include/fsl_devdis.h new file mode 100644 index 0000000000..02415feed8 --- /dev/null +++ b/include/fsl_devdis.h @@ -0,0 +1,18 @@ +/* + * Copyright 2015 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __FSL_DEVDIS_H_ +#define __FSL_DEVDIS_H_ + +struct devdis_table { + char name[32]; + u32 offset; + u32 mask; +}; + +void device_disable(const struct devdis_table *tbl, uint32_t num); + +#endif -- cgit v1.2.1