From 03c22449c5b7daff0a43291b34564a52660b83b8 Mon Sep 17 00:00:00 2001
From: Zhuoyu Zhang <Zhuoyu.Zhang@freescale.com>
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 <Zhuoyu.Zhang@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
---
 board/freescale/ls1021atwr/ls1021atwr.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'board/freescale/ls1021atwr')

diff --git a/board/freescale/ls1021atwr/ls1021atwr.c b/board/freescale/ls1021atwr/ls1021atwr.c
index 006700f..228dbf8 100644
--- a/board/freescale/ls1021atwr/ls1021atwr.c
+++ b/board/freescale/ls1021atwr/ls1021atwr.c
@@ -12,6 +12,7 @@
 #include <asm/arch/clock.h>
 #include <asm/arch/fsl_serdes.h>
 #include <asm/arch/ls102xa_stream_id.h>
+#include <asm/arch/ls102xa_devdis.h>
 #include <hwconfig.h>
 #include <mmc.h>
 #include <fsl_esdhc.h>
@@ -21,6 +22,7 @@
 #include <fsl_mdio.h>
 #include <tsec.h>
 #include <fsl_sec.h>
+#include <fsl_devdis.h>
 #include <spl.h>
 #include "../common/sleep.h"
 #ifdef CONFIG_U_QE
@@ -652,6 +654,9 @@ int board_init(void)
 #if defined(CONFIG_MISC_INIT_R)
 int misc_init_r(void)
 {
+#ifdef CONFIG_FSL_DEVICE_DISABLE
+	device_disable(devdis_tbl, ARRAY_SIZE(devdis_tbl));
+#endif
 #ifndef CONFIG_QSPI_BOOT
 	config_board_mux();
 #endif
-- 
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