Messages in this thread |  | | Date | Tue, 5 May 2026 09:33:38 +0530 | | Subject | Re: [PATCH RESEND v8 2/2] watchdog: Add driver for Gunyah Watchdog | | From | Kathiravan Thirumoorthy <> |
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On 5/5/2026 8:56 AM, Pavan Kondeti wrote: > On Thu, Apr 30, 2026 at 07:37:12AM -0700, Guenter Roeck wrote: >> 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: >>>>> From: Hrishabh Rajput <hrishabh.rajput@oss.qualcomm.com> >>>>> >>>>> 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@oss.qualcomm.com> >>>>> Tested-by: Neil Armstrong <neil.armstrong@linaro.org> >>>>> Tested-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com> >>>>> Reviewed-by: Guenter Roeck <linux@roeck-us.net> >>>>> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> >>>>> Signed-off-by: Hrishabh Rajput <hrishabh.rajput@oss.qualcomm.com> >>>>> Signed-off-by: Pavankumar Kondeti <pavan.kondeti@oss.qualcomm.com> >>>> 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. >>>> >>> Thanks Bjorn. I noticed that 1/2 is available in v7.1-rc1 , however 2/2 >>> 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 >> >> > Thanks Guenter for the reply. > > Wim, > > Can you please include this driver (2/2 PATCH) for the next release? Please let us > know if I need to do anything else?
Pavan,
Please look at the announcement from the Guenter[1] and I see this change in the watchdog-next branch of Guenter's tree[2].
[1] https://lore.kernel.org/linux-watchdog/cc68acee-484b-4fa5-a3f3-6add81d63d22@oss.qualcomm.com/T/#m11e748ea57c88853b8bdc4e41cac08b7c1cd1b77
[2] https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git/log/?h=watchdog-next
Thanks,
Kathiravan T.
> > Thanks, > Pavan >
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