From: 黄涛 <huangtao@rock-chips.com>
Date: Mon, 25 Aug 2014 10:21:55 +0000 (+0800)
Subject: misc: SRAM: Add option to map SRAM as cacheable
X-Git-Tag: firefly_0821_release~4803
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=79082d3c51f21fafeb4eb9dd23440de35695d1d9;p=firefly-linux-kernel-4.4.55.git

misc: SRAM: Add option to map SRAM as cacheable
---

diff --git a/Documentation/devicetree/bindings/misc/sram.txt b/Documentation/devicetree/bindings/misc/sram.txt
index 4fa9af31a061..db6ee8e79100 100644
--- a/Documentation/devicetree/bindings/misc/sram.txt
+++ b/Documentation/devicetree/bindings/misc/sram.txt
@@ -11,6 +11,7 @@ Required properties:
 Optional properties:
 
 - map-exec: Map range to allow code execution
+- map-cacheable: Map range as cacheable
 
 Example:
 
diff --git a/drivers/misc/sram.c b/drivers/misc/sram.c
index baa50080ac46..31f268c86885 100644
--- a/drivers/misc/sram.c
+++ b/drivers/misc/sram.c
@@ -53,6 +53,8 @@ static int sram_probe(struct platform_device *pdev)
 		map_exec |= true;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (res && of_get_property(pdev->dev.of_node, "map-cacheable", NULL))
+		res->flags |= IORESOURCE_CACHEABLE;
 	if (map_exec)
 		virt_base = devm_ioremap_exec_resource(&pdev->dev, res);
 	else