linux-kernel - [PATCH v4 3/6] soc: sifive: ccache: determine the cache level from dts

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Message-Id: <20220912065029.1793-4-zong.li@sifive.com>
Date:   Mon, 12 Sep 2022 06:50:26 +0000
From:   Zong Li <zong.li@...ive.com>
To:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        palmer@...belt.com, paul.walmsley@...ive.com,
        aou@...s.berkeley.edu, greentime.hu@...ive.com,
        conor.dooley@...rochip.com, ben.dooks@...ive.com, bp@...en8.de,
        devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Zong Li <zong.li@...ive.com>
Subject: [PATCH v4 3/6] soc: sifive: ccache: determine the cache level from dts

Composable cache could be L2 or L3 cache, use 'cache-level' property of
device node to determine the level.

Signed-off-by: Zong Li <zong.li@...ive.com>
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
---
 drivers/soc/sifive/sifive_ccache.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/sifive/sifive_ccache.c b/drivers/soc/sifive/sifive_ccache.c
index 949b824e89ad..b361b661ea09 100644
--- a/drivers/soc/sifive/sifive_ccache.c
+++ b/drivers/soc/sifive/sifive_ccache.c
@@ -38,6 +38,7 @@
 static void __iomem *ccache_base;
 static int g_irq[SIFIVE_CCACHE_MAX_ECCINTR];
 static struct riscv_cacheinfo_ops ccache_cache_ops;
+static int level;
 
 enum {
 	DIR_CORR = 0,
@@ -144,7 +145,7 @@ static const struct attribute_group *ccache_get_priv_group(struct cacheinfo
 							   *this_leaf)
 {
 	/* We want to use private group for composable cache only */
-	if (this_leaf->level == 2)
+	if (this_leaf->level == level)
 		return &priv_attr_group;
 	else
 		return NULL;
@@ -215,6 +216,9 @@ static int __init sifive_ccache_init(void)
 	if (!ccache_base)
 		return -ENOMEM;
 
+	if (of_property_read_u32(np, "cache-level", &level))
+		return -ENOENT;
+
 	intr_num = of_property_count_u32_elems(np, "interrupts");
 	if (!intr_num) {
 		pr_err("CCACHE: no interrupts property\n");
-- 
2.17.1