fdt_support: Add fdt_for_each_node_by_compatible() helper macro

Add macro fdt_for_each_node_by_compatible() to allow iterating over
fdt nodes by compatible string.

Convert various usages of
    off = fdt_node_offset_by_compatible(fdt, start, compat);
    while (off > 0) {
        code();
        off = fdt_node_offset_by_compatible(fdt, off, compat);
    }
and similar, to
    fdt_for_each_node_by_compatible(off, fdt, start, compat)
        code();

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>

1 files changed, 1 insertions, 4 deletions

diff --git a/arch/arm/mach-tegra/gpu.c b/arch/arm/mach-tegra/gpu.c
index 13ffade..36538e7 100644
--- a/arch/arm/mach-tegra/gpu.c
+++ b/arch/arm/mach-tegra/gpu.c
@@ -46,11 +46,8 @@ int tegra_gpu_enable_node(void *blob, const char *compat)
 	if (!_configured)
 		return 0;
 
-	offset = fdt_node_offset_by_compatible(blob, -1, compat);
-	while (offset != -FDT_ERR_NOTFOUND) {
+	fdt_for_each_node_by_compatible(offset, blob, -1, compat)
 		fdt_status_okay(blob, offset);
-		offset = fdt_node_offset_by_compatible(blob, offset, compat);
-	}
 
 	return 0;
 }