Re: [PATCH RESEND v8 2/2] watchdog: Add driver for Gunyah Watchdog
From: Guenter Roeck
Date: Thu Apr 30 2026 - 10:37:21 EST
On 4/29/26 23:15, Pavan Kondeti wrote:
On Mon, Mar 30, 2026 at 09:11:48AM -0500, Bjorn Andersson wrote:
On Wed, Mar 11, 2026 at 11:16:31AM +0530, Pavankumar Kondeti wrote:Thanks Bjorn. I noticed that 1/2 is available in v7.1-rc1 , however 2/2
From: Hrishabh Rajput <hrishabh.rajput@xxxxxxxxxxxxxxxx>
On Qualcomm SoCs running under the Gunyah hypervisor, access to watchdog
through MMIO is not available on all platforms. Depending on the
hypervisor configuration, the watchdog is either fully emulated or
exposed via ARM's SMC Calling Conventions (SMCCC) through the Vendor
Specific Hypervisor Service Calls space.
Add driver to support the SMC-based watchdog provided by the Gunyah
Hypervisor. Device registration is done in the QCOM SCM driver after
checks to restrict the watchdog initialization to Qualcomm devices
running under Gunyah.
Gunyah watchdog is not a hardware but an SMC-based vendor-specific
hypervisor interface provided by the Gunyah hypervisor. The design
involving QCOM SCM driver for registering the platform device has been
devised to avoid adding non-hardware nodes to devicetree.
Tested-by: Shivendra Pratap <shivendra.pratap@xxxxxxxxxxxxxxxx>
Tested-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Tested-by: Mukesh Ojha <mukesh.ojha@xxxxxxxxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxxxxxxxx>
Signed-off-by: Hrishabh Rajput <hrishabh.rajput@xxxxxxxxxxxxxxxx>
Signed-off-by: Pavankumar Kondeti <pavan.kondeti@xxxxxxxxxxxxxxxx>
Guenter, there's no build-time dependency between the two patches. I'm
applying patch 1 through the qcom tree, please apply this patch through
the watchdog tree.
is missing. Guenter, can you please pick it up for next release?
I don't send watchdog patches upstream; that has always been handled by Wim.
Guenter