u-boot/drivers/misc/fsl_devdis.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2015 Freescale Semiconductor, Inc.
 * Author: Zhuoyu Zhang <Zhuoyu.Zhang@freescale.com>
 */
#include <common.h>
#include <asm/io.h>
#include <asm/arch-ls102xa/immap_ls102xa.h>
#include <asm/arch-ls102xa/config.h>
#include <linux/compiler.h>
#include <hwconfig.h>
#include <fsl_devdis.h>

void device_disable(const struct devdis_table *tbl, uint32_t num)
{
	int i;
	struct ccsr_gur __iomem *gur = (void *)CONFIG_SYS_FSL_GUTS_ADDR;

	/*
	 * Extract hwconfig from environment and disable unused device.
	 */
	for (i = 0; i < num; i++) {
		if (hwconfig_sub("devdis", tbl[i].name))
			setbits_be32(&gur->devdisr + tbl[i].offset,
				tbl[i].mask);
	}
}
SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com> 7 years ago			`// SPDX-License-Identifier: GPL-2.0+`
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> 10 years ago			`/*`
			`* Copyright 2015 Freescale Semiconductor, Inc.`
			`* Author: Zhuoyu Zhang <Zhuoyu.Zhang@freescale.com>`
			`*/`
			`#include <common.h>`
			`#include <asm/io.h>`
			`#include <asm/arch-ls102xa/immap_ls102xa.h>`
			`#include <asm/arch-ls102xa/config.h>`
			`#include <linux/compiler.h>`
			`#include <hwconfig.h>`
			`#include <fsl_devdis.h>`

			`void device_disable(const struct devdis_table *tbl, uint32_t num)`
			`{`
			`int i;`
			`struct ccsr_gur __iomem gur = (void )CONFIG_SYS_FSL_GUTS_ADDR;`

			`/*`
			`* Extract hwconfig from environment and disable unused device.`
			`*/`
			`for (i = 0; i < num; i++) {`
			`if (hwconfig_sub("devdis", tbl[i].name))`
			`setbits_be32(&gur->devdisr + tbl[i].offset,`
			`tbl[i].mask);`
			`}`
			`}`