Fixes the serial port output stopping mid way through the boot process by reverting the kernel commit that caused it.
Signed-off-by: Joshua Watt <[email protected]> --- ...-resolve-supply-after-creating-regul.patch | 53 +++++++++++++++++++ recipes-kernel/linux/linux-yocto_5.8.bbappend | 4 ++ 2 files changed, 57 insertions(+) create mode 100644 recipes-kernel/linux/linux-yocto/0001-Revert-regulator-resolve-supply-after-creating-regul.patch create mode 100644 recipes-kernel/linux/linux-yocto_5.8.bbappend diff --git a/recipes-kernel/linux/linux-yocto/0001-Revert-regulator-resolve-supply-after-creating-regul.patch b/recipes-kernel/linux/linux-yocto/0001-Revert-regulator-resolve-supply-after-creating-regul.patch new file mode 100644 index 0000000..3dd336b --- /dev/null +++ b/recipes-kernel/linux/linux-yocto/0001-Revert-regulator-resolve-supply-after-creating-regul.patch @@ -0,0 +1,53 @@ +From a414d39b848002e15531f2538d2b6427ce51d07d Mon Sep 17 00:00:00 2001 +From: Joshua Watt <[email protected]> +Date: Thu, 10 Dec 2020 15:59:47 -0600 +Subject: [PATCH] Revert "regulator: resolve supply after creating regulator" + +This commit prevents the serial console from working on the Rock Pi 4 +for some reason. It *appears* to possibly be fixed by some other commit +upstream, but after a lot of head scratching and bisecting, I was unable +to find which one, so just revert it for now and we can deal with it +later. + +This reverts commit 96c6b5d5775637b3095ef934f871044811fd4db7. + +--- + drivers/regulator/core.c | 21 ++++++++------------- + 1 file changed, 8 insertions(+), 13 deletions(-) + +diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c +index 25e601bf9383..be8c709a7488 100644 +--- a/drivers/regulator/core.c ++++ b/drivers/regulator/core.c +@@ -5187,20 +5187,15 @@ regulator_register(const struct regulator_desc *regulator_desc, + else if (regulator_desc->supply_name) + rdev->supply_name = regulator_desc->supply_name; + ++ /* ++ * Attempt to resolve the regulator supply, if specified, ++ * but don't return an error if we fail because we will try ++ * to resolve it again later as more regulators are added. ++ */ ++ if (regulator_resolve_supply(rdev)) ++ rdev_dbg(rdev, "unable to resolve supply\n"); ++ + ret = set_machine_constraints(rdev, constraints); +- if (ret == -EPROBE_DEFER) { +- /* Regulator might be in bypass mode and so needs its supply +- * to set the constraints */ +- /* FIXME: this currently triggers a chicken-and-egg problem +- * when creating -SUPPLY symlink in sysfs to a regulator +- * that is just being created */ +- ret = regulator_resolve_supply(rdev); +- if (!ret) +- ret = set_machine_constraints(rdev, constraints); +- else +- rdev_dbg(rdev, "unable to resolve supply early: %pe\n", +- ERR_PTR(ret)); +- } + if (ret < 0) + goto wash; + +-- +2.29.2 + diff --git a/recipes-kernel/linux/linux-yocto_5.8.bbappend b/recipes-kernel/linux/linux-yocto_5.8.bbappend new file mode 100644 index 0000000..5a31842 --- /dev/null +++ b/recipes-kernel/linux/linux-yocto_5.8.bbappend @@ -0,0 +1,4 @@ +FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:" + +SRC_URI_append_rock-pi-4 = " file://0001-Revert-regulator-resolve-supply-after-creating-regul.patch" + -- 2.29.2
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