Currently the processor PLLs and Dividers are configured according to SYSBOOT levels during boot [1][2]. In the case of boards with expansion capabitliy, like the Beaglebone, the expansion board might touch this SYSBOOT pins a provide a wrong clock information. If we know the OSC on board as a fact (for example 24MHz for the Beaglebone), the SYSBOOT information can be safely ignored and the correct value hardcoded on the DT. The patch following works for am33xx. Anyway I have some reservations about this. Maybe overriding "sys_clkin_ck" with "virt_24000000_ck" is a better solution? Regards, Nuno [1] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/am33xx-clocks.dtsi#n11 [2] http://www.ti.com/lit/ug/spruh73l/spruh73l.pdf diff --git a/src/arm/am335x-bone-common.dtsi b/src/arm/am335x-bone-common.dtsi index 77067d6..1ddaa58 100644 --- a/src/arm/am335x-bone-common.dtsi +++ b/src/arm/am335x-bone-common.dtsi @@ -356,6 +356,10 @@ status = "okay"; }; +&sys_clkin_ck { + clocks = <&virt_24000000_ck>, <&virt_24000000_ck>, <&virt_24000000_ck>, <&virt_24000000_ck>; +}; + /* the cape manager */ / { bone_capemgr { -- 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
