lkml.org 
[lkml]   [2021]   [Feb]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH v4 0/8] Make fw_devlink=on more forgiving
Date
Hi, Saravana,

On 2/6/21 12:26 AM, Saravana Kannan wrote:
> There are a lot of devices/drivers where they never have a struct device
> created for them or the driver initializes the hardware without ever
> binding to the struct device.
>
> This series is intended to avoid any boot regressions due to such
> devices/drivers when fw_devlink=on and also address the handling of
> optional suppliers.
>
> Patch 1 and 2 addresses the issue of firmware nodes that look like
> they'll have struct devices created for them, but will never actually
> have struct devices added for them. For example, DT nodes with a
> compatible property that don't have devices added for them.
>
> Patch 3 and 4 allow for handling optional DT bindings.
>
> Patch 5 sets up a generic API to handle drivers that never bind with
> their devices.
>
> Patch 6 through 8 update different frameworks to use the new API.
>
> Thanks,
> Saravana
>
> Saravana Kannan (8):
> driver core: fw_devlink: Detect supplier devices that will never be
> added
> of: property: Don't add links to absent suppliers
> driver core: Add fw_devlink.strict kernel param
> of: property: Add fw_devlink support for optional properties
> driver core: fw_devlink: Handle suppliers that don't use driver core
> irqdomain: Mark fwnodes when their irqdomain is added/removed
> PM: domains: Mark fwnodes when their powerdomain is added/removed
> clk: Mark fwnodes when their clock provider is added/removed
>
> .../admin-guide/kernel-parameters.txt | 5 ++
> drivers/base/core.c | 58 ++++++++++++++++++-
> drivers/base/power/domain.c | 2 +
> drivers/clk/clk.c | 3 +
> drivers/of/property.c | 16 +++--
> include/linux/fwnode.h | 20 ++++++-
> kernel/irq/irqdomain.c | 2 +
> 7 files changed, 98 insertions(+), 8 deletions(-)
>

Even with this patch set applied, sama5d2_xplained can not boot.
Patch at [1] makes sama5d2_xplained boot again. Stephen applied it
to clk-next.

Cheers,
ta

[1] https://lore.kernel.org/lkml/20210203154332.470587-1-tudor.ambarus@microchip.com/
\
 
 \ /
  Last update: 2021-02-10 09:21    [W:0.857 / U:2.968 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site