Re: [PATCH v4 01/29] Revert "treewide: Fix probing of devices in DT overlays"

[Rob Herring <robh@kernel.org>]

On Mon, Nov 24, 2025 at 10:44 AM Kalle Niemi <kaleposti@gmail.com> wrote:
>
>
> On 11/24/25 16:53, Rob Herring wrote:
> > On Mon, Nov 24, 2025 at 8:48 AM Kalle Niemi <kaleposti@gmail.com> wrote:
> >> On 10/15/25 10:13, Herve Codina wrote:
> >>> From: Saravana Kannan <saravanak@google.com>
> >>>
> >>> This reverts commit 1a50d9403fb90cbe4dea0ec9fd0351d2ecbd8924.
> >>>
> >>> While the commit fixed fw_devlink overlay handling for one case, it
> >>> broke it for another case. So revert it and redo the fix in a separate
> >>> patch.
> >>>
> >>> Fixes: 1a50d9403fb9 ("treewide: Fix probing of devices in DT overlays")
> >>> Reported-by: Herve Codina <herve.codina@bootlin.com>
> >>> Closes: https://lore.kernel.org/lkml/CAMuHMdXEnSD4rRJ-o90x4OprUacN_rJgyo8x6=9F9rZ+-KzjOg@mail.gmail.com/
> >>> Closes: https://lore.kernel.org/all/20240221095137.616d2aaa@bootlin.com/
> >>> Closes: https://lore.kernel.org/lkml/20240312151835.29ef62a0@bootlin.com/
> >>> Signed-off-by: Saravana Kannan <saravanak@google.com>
> >>> Link: https://lore.kernel.org/lkml/20240411235623.1260061-2-saravanak@google.com/
> >>> Signed-off-by: Herve Codina <herve.codina@bootlin.com>
> >>> Acked-by: Mark Brown <broonie@kernel.org>
> >>> ---
> >>>    drivers/bus/imx-weim.c    | 6 ------
> >>>    drivers/i2c/i2c-core-of.c | 5 -----
> >>>    drivers/of/dynamic.c      | 1 -
> >>>    drivers/of/platform.c     | 5 -----
> >>>    drivers/spi/spi.c         | 5 -----
> >>>    5 files changed, 22 deletions(-)
> >>>
> >>> diff --git a/drivers/bus/imx-weim.c b/drivers/bus/imx-weim.c
> >>> index 83d623d97f5f..87070155b057 100644
> >>> --- a/drivers/bus/imx-weim.c
> >>> +++ b/drivers/bus/imx-weim.c
> >>> @@ -327,12 +327,6 @@ static int of_weim_notify(struct notifier_block *nb, unsigned long action,
> >>>                                 "Failed to setup timing for '%pOF'\n", rd->dn);
> >>>
> >>>                if (!of_node_check_flag(rd->dn, OF_POPULATED)) {
> >>> -                     /*
> >>> -                      * Clear the flag before adding the device so that
> >>> -                      * fw_devlink doesn't skip adding consumers to this
> >>> -                      * device.
> >>> -                      */
> >>> -                     rd->dn->fwnode.flags &= ~FWNODE_FLAG_NOT_DEVICE;
> >>>                        if (!of_platform_device_create(rd->dn, NULL, &pdev->dev)) {
> >>>                                dev_err(&pdev->dev,
> >>>                                        "Failed to create child device '%pOF'\n",
> >>> diff --git a/drivers/i2c/i2c-core-of.c b/drivers/i2c/i2c-core-of.c
> >>> index eb7fb202355f..30b48a428c0b 100644
> >>> --- a/drivers/i2c/i2c-core-of.c
> >>> +++ b/drivers/i2c/i2c-core-of.c
> >>> @@ -176,11 +176,6 @@ static int of_i2c_notify(struct notifier_block *nb, unsigned long action,
> >>>                        return NOTIFY_OK;
> >>>                }
> >>>
> >>> -             /*
> >>> -              * Clear the flag before adding the device so that fw_devlink
> >>> -              * doesn't skip adding consumers to this device.
> >>> -              */
> >>> -             rd->dn->fwnode.flags &= ~FWNODE_FLAG_NOT_DEVICE;
> >>>                client = of_i2c_register_device(adap, rd->dn);
> >>>                if (IS_ERR(client)) {
> >>>                        dev_err(&adap->dev, "failed to create client for '%pOF'\n",
> >>> diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
> >>> index 2eaaddcb0ec4..b5be7484fb36 100644
> >>> --- a/drivers/of/dynamic.c
> >>> +++ b/drivers/of/dynamic.c
> >>> @@ -225,7 +225,6 @@ static void __of_attach_node(struct device_node *np)
> >>>        np->sibling = np->parent->child;
> >>>        np->parent->child = np;
> >>>        of_node_clear_flag(np, OF_DETACHED);
> >>> -     np->fwnode.flags |= FWNODE_FLAG_NOT_DEVICE;
> >>>
> >>>        raw_spin_unlock_irqrestore(&devtree_lock, flags);
> >>>
> >>> diff --git a/drivers/of/platform.c b/drivers/of/platform.c
> >>> index f77cb19973a5..ef9445ba168b 100644
> >>> --- a/drivers/of/platform.c
> >>> +++ b/drivers/of/platform.c
> >>> @@ -739,11 +739,6 @@ static int of_platform_notify(struct notifier_block *nb,
> >>>                if (of_node_check_flag(rd->dn, OF_POPULATED))
> >>>                        return NOTIFY_OK;
> >>>
> >>> -             /*
> >>> -              * Clear the flag before adding the device so that fw_devlink
> >>> -              * doesn't skip adding consumers to this device.
> >>> -              */
> >>> -             rd->dn->fwnode.flags &= ~FWNODE_FLAG_NOT_DEVICE;
> >>>                /* pdev_parent may be NULL when no bus platform device */
> >>>                pdev_parent = of_find_device_by_node(parent);
> >>>                pdev = of_platform_device_create(rd->dn, NULL,
> >>> diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
> >>> index 2e0647a06890..b22944a207c9 100644
> >>> --- a/drivers/spi/spi.c
> >>> +++ b/drivers/spi/spi.c
> >>> @@ -4791,11 +4791,6 @@ static int of_spi_notify(struct notifier_block *nb, unsigned long action,
> >>>                        return NOTIFY_OK;
> >>>                }
> >>>
> >>> -             /*
> >>> -              * Clear the flag before adding the device so that fw_devlink
> >>> -              * doesn't skip adding consumers to this device.
> >>> -              */
> >>> -             rd->dn->fwnode.flags &= ~FWNODE_FLAG_NOT_DEVICE;
> >>>                spi = of_register_spi_device(ctlr, rd->dn);
> >>>                put_device(&ctlr->dev);
> >>>
> >> Sorry, some of you will receive this message now for second time. First
> >> message was sent to older series of patches.
> >> -
> >>
> >> Hello,
> >>
> >> Test system testing drivers for ROHM ICs bisected this commit to cause
> >> BD71847 drivers probe to not be called.
> > This driver (and overlay support) is in linux-next or something out of
> > tree on top of linux-next?
> >
> > Rob
>
> Yes the driver is in mainline linux: /drivers/mfd/rohm-bd718x7.c

I don't see any support to apply overlays in that driver.

Rob