From c480bbd92b3273ecff5396da9221e7bcb08774ba Mon Sep 17 00:00:00 2001 From: Quentin Schulz Date: Fri, 3 Jul 2026 18:43:32 +0200 Subject: drivers: sysreset: revert support for args in request This reverts: - commit e49c84f7bb7b ("doc: usage: cmd: reset: specify when the -edl option is available") - commit 1076feb8a3f9 ("cmd: boot: fix edl being shown when not supported") - commit 63c806ba0e12 ("qcom_defconfig: enable psci based sysreset") - commit ef06c5d76ff4 ("cmd: boot: Add '-edl' option to reset command documentation") - commit 32825eaddc37 ("sysreset: Implement PSCI based reset to EDL mode for QCOM SoCs") - commit fcb48b89813b ("drivers: sysreset: Add sysreset op that can take arguments") There was a conflict reverting commit 63c806ba0e12 ("qcom_defconfig: enable psci based sysreset") due to commit 02ef1859b44f ("configs: Resync with savedefconfig"), but the conflict resolution was trivial. The args support for the sysreset uclass contains a logic bug. The first sysreset device implementing the request_arg callback will consume the args, not support the specified arg and thus return -EPROTONOSUPPORT which will stop the iteration over all sysreset devices. This is an issue if one has multiple sysreset devices and each with support for different (valid) args. If a sysreset device implements a -dummy argument and another -foo and a user calls reset -dummy from the U-Boot CLI, it'll depend on which sysreset device will be attempted first. If it is the one implementing -foo, it'll return it doesn't support the argument with -EPROTONOSUPPORT in which case the device implementing -dummy will never be attempted and instead we'll do a cold reset which is very likely not what's expected from the user. Casey suggested[1] we revert this and start from scratch again with a different implementation instead. [1] https://lore.kernel.org/u-boot/77ff0f56-5c3b-42e7-bdd1-bf90296da900@linaro.org/ Acked-by: Casey Connolly Signed-off-by: Quentin Schulz --- drivers/firmware/psci.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'drivers/firmware') diff --git a/drivers/firmware/psci.c b/drivers/firmware/psci.c index b6838a244d2..2e3223e1c32 100644 --- a/drivers/firmware/psci.c +++ b/drivers/firmware/psci.c @@ -186,10 +186,6 @@ static int psci_bind(struct udevice *dev) NULL); if (ret) pr_debug("PSCI System Reset was not bound.\n"); - if (IS_ENABLED(CONFIG_SYSRESET_QCOM_PSCI) && - device_bind_driver(dev, "qcom_psci-sysreset", - "qcom_psci-sysreset", NULL)) - pr_debug("QCOM PSCI System Reset was not bound.\n"); } /* From PSCI v1.0 onward we can discover services through ARM_SMCCC_FEATURE */ -- cgit v1.3.1