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Nikolaus Schaller" In-Reply-To: Date: Thu, 22 Apr 2021 19:06:36 +0200 Cc: Jiaxun Yang , Arnd Bergmann , Thomas Bogendoerfer , Huacai Chen , Huacai Chen , linux-arch@vger.kernel.org, "linux-mips@vger.kernel.org" , Linux Kernel Mailing List , Paul Boddie , Lubomir Rintel Content-Transfer-Encoding: quoted-printable Message-Id: <8FCB8F58-7F0A-4A9E-8BEA-7CCF09A43B63@goldelico.com> References: <51BC7C74-68BF-4A8E-8CFB-DB4EBBC89706@goldelico.com> <2d636696-35f0-4731-b1c3-5445a57964fb@www.fastmail.com> <895956F9-4EBC-4C8A-9BF2-7E457E96C1D7@goldelico.com> To: "Maciej W. Rozycki" X-Mailer: Apple Mail (2.3124) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Am 22.04.2021 um 18:55 schrieb Maciej W. Rozycki : >=20 >=20 > Have you used it as a module or at bootstrap? I did load it by insmod. > I would expect your JZ4730 device to have the CP0 Count register as = well,=20 > as it has been architectural ever since MIPS III really, or is your = system=20 > SMP with CP0 Count registers out of sync across CPUs due to sleep = modes or=20 > whatever? It switches clocksource to some operating system timers on the SoC which may have an influence on the resolution (or precision). > Thanks for sharing your figures. It was a pleasure towards better MIPS support... >=20 >> [1] we are preparing full support for the JZ4730 based Skytone Alpha = machine. Most features >> are working except sound/I2S. I2C is a little unreliable and Ethernet = has hickups. And scheduling >> which indicates some fundamental IRQ or timer issue we could not yet = identify. >=20 > Good luck with that! BR and thanks, Niklaus