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fdt: Add new fdt_set_node_status & fdt_set_status_by_alias helpers

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Add common function fdt_set_node_status() to assist in various locations
that we set a nodes status.  This function utilizes the status values
that are part of the EPAPR spec (on power.org).

fdt_set_status_by_alias() is based on fdt_set_node_status() but uses an
alias string to identify the node to update.

We also add some shortcut functions to help the common cases of setting
"okay" and "disabled":

	fdt_status_okay()
	fdt_status_disabled()
	fdt_status_okay_by_alias()
	fdt_status_disabled_by_alias()

Finally, we fixup the corenet_ds ethernet code which previously had
a function by the same name that can be replaced with the new helpers.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Gerald Van Baren <vanbaren@cideas.com>
This commit is contained in:
Shengzhou Liu
2011-10-14 16:26:05 +08:00
committed by Kumar Gala
parent 4d28db8a1e
commit 2a523f5240
4 changed files with 101 additions and 49 deletions
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60
common/fdt_support.c
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@@ -2,7 +2,7 @@
* (C) Copyright 2007
* Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
*
* Copyright 2010 Freescale Semiconductor, Inc.
* Copyright 2010-2011 Freescale Semiconductor, Inc.
*
* See file CREDITS for list of people who contributed to this
* project.
@@ -1259,6 +1259,64 @@ unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
return phandle;
}
/*
* fdt_set_node_status: Set status for the given node
*
* @fdt: ptr to device tree
* @nodeoffset: node to update
* @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
* FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
* @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
*/
int fdt_set_node_status(void *fdt, int nodeoffset,
enum fdt_status status, unsigned int error_code)
{
char buf[16];
int ret = 0;
if (nodeoffset < 0)
return nodeoffset;
switch (status) {
case FDT_STATUS_OKAY:
ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
break;
case FDT_STATUS_DISABLED:
ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
break;
case FDT_STATUS_FAIL:
ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
break;
case FDT_STATUS_FAIL_ERROR_CODE:
sprintf(buf, "fail-%d", error_code);
ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
break;
default:
printf("Invalid fdt status: %x\n", status);
ret = -1;
break;
}
return ret;
}
/*
* fdt_set_status_by_alias: Set status for the given node given an alias
*
* @fdt: ptr to device tree
* @alias: alias of node to update
* @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
* FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
* @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
*/
int fdt_set_status_by_alias(void *fdt, const char* alias,
enum fdt_status status, unsigned int error_code)
{
int offset = fdt_path_offset(fdt, alias);
return fdt_set_node_status(fdt, offset, status, error_code);
}
#if defined(CONFIG_VIDEO)
int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
{