On Thu, Dec 15, 2016 at 10:16 AM, Tony Lindgren <tony@xxxxxxxxxxx> wrote: > * Adam Ford <aford173@xxxxxxxxx> [161215 07:53]: >> On Thu, Dec 15, 2016 at 9:40 AM, Tony Lindgren <tony@xxxxxxxxxxx> wrote: >> > * Adam Ford <aford173@xxxxxxxxx> [161215 07:27]: >> >> On Thu, Dec 15, 2016 at 2:44 AM, Daniel Gomez <dgomez@xxxxxxxxxxx> wrote: >> >> > Thanks for your answer Tony, >> >> > >> >> > I would like to fix it but I don't know how to start. Any idea or >> >> > suggestion please? >> >> > I have patched kernel 4.3 with this patch with the same result: >> >> > http://lists.infradead.org/pipermail/linux-arm-kernel/2014-October/294018.html >> >> > >> >> > Furthermore, which kernel version is recommended to be use? >> >> > >> >> > Daniel >> >> > >> >> > 2016-12-14 20:52 GMT+01:00 Tony Lindgren <tony@xxxxxxxxxxx>: >> >> >> >> >> >> * Daniel Gomez <dgomez@xxxxxxxxxxx> [161214 08:14]: >> >> >> > HI, >> >> >> > >> >> >> > I would like to know about the status for supporting 1GHz of DM3730 >> >> >> > processor (omap3) in the kernel mainline. Daniel, I was able to get my DM3730 working at 1GHz with the following patch: diff --git a/arch/arm/boot/dts/omap36xx.dtsi b/arch/arm/boot/dts/omap36xx.dtsi index 718fa88..2c97783 100644 --- a/arch/arm/boot/dts/omap36xx.dtsi +++ b/arch/arm/boot/dts/omap36xx.dtsi @@ -25,6 +25,7 @@ 300000 1012500 600000 1200000 800000 1325000 + 1000000 1375000 >; clock-latency = <300000>; /* From legacy driver */ }; I looked at the device tree for omap36 and abb_mpu_iva: regulator-abb-mpu shows 1375000 with ABB set to 1 What I am not sure is how to confirm whether or not there is more to do. I confirmed that vdd1 (which powers the CPU on my board) is running at 1.375 volts. >> >> >> >> >> >> Yeah unfortunately the voltdomain support is still missing. Somebody >> >> >> just needs to fix it.. >> >> >> Tony - Can you elaborate on what voltdomain support is? I'm willing to look into it. >> >> >> >> I modified the om36xx.dtsi file to list 1000000 and 1375000 uV, but I >> >> couldn't figure out how to autodetect whether or not the >> >> DM3730/OMAP3630 was 800MHz or 1000. >> >> > > Tony [snip] I also pushed a patch to the U-Boot which updates the proper reading and display of 800/1GHz versions of the various DM37/AM37 processors, but it hasn't been reviewed or approved yet. I don't know what Tony's opinion is, but if we don't have a good way (yet) to limit the 800 MHz version to 800MHz with the 1000 entry in the device tree, we might be able to use U-Boot to determine which speed is correct and load/modify the device tree before the kernel boots. adam -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
