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From:   Flavio Suligoi <f.suligoi@asem.it>
To:     Russell King <linux@armlinux.org.uk>,
        Alexios Zavras <alexios.zavras@intel.com>,
        Allison Randal <allison@lohutok.net>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Thomas Gleixner <tglx@linutronix.de>
CC:     <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, Flavio Suligoi <f.suligoi@asem.it>
Subject: [PATCH] ARM: mm: print L310 cache controller version
Date:   Mon, 24 Jun 2019 15:54:49 +0200
Message-ID: <1561384489-29906-1-git-send-email-f.suligoi@asem.it>
MIME-Version: 1.0
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Sender: linux-kernel-owner@vger.kernel.org
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The knowledge of the cache controller version
is very useful during the comparison of the performances
of similar boards, with similar CPU but different versions
of the L310 controller.

Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
---
 arch/arm/mm/cache-l2x0.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c
index 5b251c8..e5ac670 100644
--- a/arch/arm/mm/cache-l2x0.c
+++ b/arch/arm/mm/cache-l2x0.c
@@ -590,6 +590,34 @@ static void l2c310_configure(void __iomem *base)
 	if (revision >= L310_CACHE_ID_RTL_R3P0)
 		l2c_write_sec(l2x0_saved_regs.pwr_ctrl, base,
 			      L310_POWER_CTRL);
+
+	/* Display L310 cache controller version */
+	switch (revision) {
+	case L310_CACHE_ID_RTL_R0P0:
+		pr_info("L2C-310 revision: r0p0\n");
+		break;
+	case L310_CACHE_ID_RTL_R1P0:
+		pr_info("L2C-310 revision: r1p0\n");
+		break;
+	case L310_CACHE_ID_RTL_R2P0:
+		pr_info("L2C-310 revision: r2p0\n");
+		break;
+	case L310_CACHE_ID_RTL_R3P0:
+		pr_info("L2C-310 revision: r3p0\n");
+		break;
+	case L310_CACHE_ID_RTL_R3P1:
+		pr_info("L2C-310 revision: r3p1\n");
+		break;
+	case L310_CACHE_ID_RTL_R3P1_50REL0:
+		pr_info("L2C-310 revision: r3p1 50 rel0\n");
+		break;
+	case L310_CACHE_ID_RTL_R3P2:
+		pr_info("L2C-310 revision: r3p2\n");
+		break;
+	case L310_CACHE_ID_RTL_R3P3:
+		pr_info("L2C-310 revision: r3p3\n");
+		break;
+	}
 }
 
 static int l2c310_starting_cpu(unsigned int cpu)
-- 
2.7.4