linux-kernel - [PATCH v2 3/4] ARM: dts: exynos: map 0x10000 SFR instead of 0x100 in DMC Exynos5422

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20191001125436.24086-4-l.luba@partner.samsung.com>
Date:   Tue,  1 Oct 2019 14:54:35 +0200
From:   Lukasz Luba <l.luba@...tner.samsung.com>
To:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     b.zolnierkie@...sung.com, krzk@...nel.org, kgene@...nel.org,
        mark.rutland@....com, cw00.choi@...sung.com,
        kyungmin.park@...sung.com, m.szyprowski@...sung.com,
        s.nawrocki@...sung.com, myungjoo.ham@...sung.com,
        robh+dt@...nel.org, willy.mh.wolff.ml@...il.com,
        Lukasz Luba <l.luba@...tner.samsung.com>
Subject: [PATCH v2 3/4] ARM: dts: exynos: map 0x10000 SFR instead of 0x100
 in DMC Exynos5422

There is a need to access registers at address offset near 0x10000.
These registers are private DMC performance counters, which might be used
as interrupt trigger when overflow. Potential usage is to skip polling
in devfreq framework and switch to interrupt managed bandwidth control.

Signed-off-by: Lukasz Luba <l.luba@...tner.samsung.com>
---
 arch/arm/boot/dts/exynos5420.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
index 45f63cd82e56..ac6dc44dbe4d 100644
--- a/arch/arm/boot/dts/exynos5420.dtsi
+++ b/arch/arm/boot/dts/exynos5420.dtsi
@@ -239,7 +239,7 @@
 
 		dmc: memory-controller@...20000 {
 			compatible = "samsung,exynos5422-dmc";
-			reg = <0x10c20000 0x100>, <0x10c30000 0x100>;
+			reg = <0x10c20000 0x10000>, <0x10c30000 0x10000>;
 			interrupt-parent = <&combiner>;
 			interrupts = <16 0>, <16 1>;
 			interrupt-names = "drex_0", "drex_1";
-- 
2.17.1