On 13/01/2021 21:29, Saravana Kannan wrote: ... >> I am seeing the same problem on Tegra30 Cardhu A04 where several regulators >> are continuously deferred and prevents the board from booting ... >> >> [ 2.518334] platform panel: probe deferral - supplier regulator@11 not ready >> >> [ 2.525503] platform regulator@1: probe deferral - supplier 4-002d not ready >> >> [ 2.533141] platform regulator@3: probe deferral - supplier regulator@101 not ready >> >> [ 2.540856] platform regulator@5: probe deferral - supplier regulator@101 not ready >> >> [ 2.548589] platform regulator@6: probe deferral - supplier regulator@101 not ready >> >> [ 2.556316] platform regulator@7: probe deferral - supplier regulator@101 not ready >> >> [ 2.564041] platform regulator@8: probe deferral - supplier regulator@101 not ready >> >> [ 2.571743] platform regulator@9: probe deferral - supplier regulator@101 not ready >> >> [ 2.579463] platform regulator@10: probe deferral - supplier regulator@101 not ready >> >> [ 2.587273] platform regulator@11: probe deferral - supplier regulator@101 not ready >> >> [ 2.595088] platform regulator@12: probe deferral - supplier regulator@104 not ready >> >> [ 2.603837] platform regulator@102: probe deferral - supplier regulator@104 not ready >> >> [ 2.611726] platform regulator@103: probe deferral - supplier regulator@104 not ready >> >> [ 2.620137] platform 3000.pcie: probe deferral - supplier regulator@5 not ready > > Looks like this is not the whole log? Do you see any "wait for > supplier" logs? That's what all these boot issues should boil down to. > And as usual, pointer to DT for this board please. Ah yes I see ... platform regulator@1: probe deferral - wait for supplier tps65911@2d Yes the device-tree for this board can be found here [0]. Looks like there is a circular dependency between the vddctrl_reg and vddcore_reg. This is part of coupled regulators which have a two-way linkage [1]. So this change appears to conflict with this. Jon [0] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/tegra30-cardhu-a04.dts [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/regulator/regulator.yaml#n129 -- nvpublic
