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Commit c2b7e05c authored by Chao Xie's avatar Chao Xie Committed by Haojian Zhuang
Browse files

ARM: cache: add dt support for tauros2 cache 



Signed-off-by: default avatarChao Xie <xiechao.mail@gmail.com>
Signed-off-by: default avatarHaojian Zhuang <haojian.zhuang@gmail.com>
parent 5cc58157

Documentation/devicetree/bindings/arm/mrvl/tauros2.txt

0 → 100644
+17 −0
Original line number Diff line number Diff line 
* Marvell Tauros2 Cache



Required properties:

- compatible : Should be "marvell,tauros2-cache".

- marvell,tauros2-cache-features : Specify the features supported for the

  tauros2 cache.

  The features including

    CACHE_TAUROS2_PREFETCH_ON       (1 << 0)

    CACHE_TAUROS2_LINEFILL_BURST8   (1 << 1)

  The definition can be found at

  arch/arm/include/asm/hardware/cache-tauros2.h



Example:

	L2: l2-cache {

		compatible = "marvell,tauros2-cache";

		marvell,tauros2-cache-features = <0x3>;

	};

arch/arm/mm/cache-tauros2.c

+34 −1
Original line number Diff line number Diff line
@@ -15,6 +15,8 @@ 
 */



#include <linux/init.h>

#include <linux/of.h>

#include <linux/of_address.h>

#include <asm/cacheflush.h>

#include <asm/cp15.h>

#include <asm/cputype.h>
@@ -198,7 +200,7 @@ static void enable_extra_feature(unsigned int features) 
	write_extra_features(u);

}



void __init tauros2_init(unsigned int features)

static void __init tauros2_internal_init(unsigned int features)

{

	char *mode = NULL;
@@ -294,3 +296,34 @@ void __init tauros2_init(unsigned int features) 
	printk(KERN_INFO "Tauros2: L2 cache support initialised "

			 "in %s mode.\n", mode);

}



#ifdef CONFIG_OF

static const struct of_device_id tauros2_ids[] __initconst = {

	{ .compatible = "marvell,tauros2-cache"},

	{}

};

#endif



void __init tauros2_init(unsigned int features)

{

#ifdef CONFIG_OF

	struct device_node *node;

	int ret;

	unsigned int f;



	node = of_find_matching_node(NULL, tauros2_ids);

	if (!node) {

		pr_info("Not found marvell,tauros2-cache, disable it\n");

		return;

	}



	ret = of_property_read_u32(node, "marvell,tauros2-cache-features", &f);

	if (ret) {

		pr_info("Not found marvell,tauros-cache-features property, "

			"disable extra features\n");

		features = 0;

	} else

		features = f;

#endif

	tauros2_internal_init(features);

}