linux-kernel - Re: [PATCH 1/6] arm64: dts: ti: k3-j721e: Add general purpose timers

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20230602070724.GH14287@atomide.com>
Date:   Fri, 2 Jun 2023 10:07:24 +0300
From:   Tony Lindgren <tony@...mide.com>
To:     Nishanth Menon <nm@...com>
Cc:     Conor Dooley <conor+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Tero Kristo <kristo@...nel.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        Udit Kumar <u-kumar1@...com>, Nitin Yadav <n-yadav@...com>,
        Neha Malcom Francis <n-francis@...com>
Subject: Re: [PATCH 1/6] arm64: dts: ti: k3-j721e: Add general purpose timers

* Nishanth Menon <nm@...com> [230531 21:32]:
> There are 20 general purpose timers on j721e that can be used for
> things like PWM using pwm-omap-dmtimer driver. There are also
> additional ten timers in the MCU domain which are meant for MCU
> firmware usage and hence marked reserved by default.
> 
> The odd numbered timers have the option of being cascaded to even
> timers to create a 64 bit non-atomic counter which is racy in simple
> usage, hence the clock muxes are explicitly setup to individual 32 bit
> counters driven off system crystal (HFOSC) as default.
> 
> These instantiation differs from J7200 and other SoCs with the device
> IDs and clocks involved for muxing.

Reviewed-by: Tony Lindgren <tony@...mide.com>