On Wed, Apr 07, 2021 at 01:07:38PM -0700, Ilya Lipnitskiy wrote: > Most MT7621 SoCs have 2 cores, which is detected and supported properly > by CPS. > > Unfortunately, MT7621 SoC has a less common S variant with only one core. > On MT7621S, GCR_CONFIG still reports 2 cores, which leads to hangs when > starting SMP. CPULAUNCH registers can be used in that case to detect the > absence of the second core and override the GCR_CONFIG PCORES field. > > Rework a long-standing OpenWrt patch to override the value of > mips_cps_numcores on single-core MT7621 systems. > > Tested on a dual-core MT7621 device (Ubiquiti ER-X) and a single-core > MT7621 device (Netgear R6220). > > Original 4.14 OpenWrt patch: > Link: https://git.openwrt.org/?p=openwrt/openwrt.git;a=commitdiff;h=4cdbc90a376dd0555201c1434a2081e055e9ceb7 > Current 5.10 OpenWrt patch: > Link: https://git.openwrt.org/?p=openwrt/openwrt.git;a=blob;f=target/linux/ramips/patches-5.10/320-mt7621-core-detect-hack.patch;h=c63f0f4c1ec742e24d8480e80553863744b58f6a;hb=10267e17299806f9885d086147878f6c492cb904 > > Suggested-by: Felix Fietkau <nbd@xxxxxxxx> > Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@xxxxxxxxx> > --- > arch/mips/include/asm/mips-cps.h | 23 ++++++++++++++++++++++- > 1 file changed, 22 insertions(+), 1 deletion(-) applied to mips-next. Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]
