linux-kernel - Re: [PATCH 1/7] usb: typec: ucsi: add PMIC Glink UCSI driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Y+YkHZASzN97QtUY@kroah.com>
Date:   Fri, 10 Feb 2023 12:01:49 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Neil Armstrong <neil.armstrong@...aro.org>
Cc:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/7] usb: typec: ucsi: add PMIC Glink UCSI driver

On Fri, Feb 10, 2023 at 11:44:22AM +0100, Neil Armstrong wrote:
> On 10/02/2023 11:38, Greg Kroah-Hartman wrote:
> > On Fri, Feb 10, 2023 at 11:31:08AM +0100, Neil Armstrong wrote:
> > > On 31/01/2023 10:16, Greg Kroah-Hartman wrote:
> > > > On Mon, Jan 30, 2023 at 10:54:32AM +0100, Neil Armstrong wrote:
> > > > > Introduce the UCSI PMIC Glink aux driver that communicates
> > > > > with the aDSP firmware with the UCSI protocol which handles
> > > > > the USB-C Port(s) Power Delivery.
> > > > > 
> > > > > The UCSI messaging is necessary on newer Qualcomm SoCs to
> > > > > provide USB role switch and altmode notifications.
> > > > > 
> > > > > Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
> > > > > ---
> > > > >    drivers/usb/typec/ucsi/Kconfig      |   7 +
> > > > >    drivers/usb/typec/ucsi/Makefile     |   1 +
> > > > >    drivers/usb/typec/ucsi/ucsi_glink.c | 321 ++++++++++++++++++++++++++++++++++++
> > > > >    3 files changed, 329 insertions(+)
> > > > > 
> > > > > diff --git a/drivers/usb/typec/ucsi/Kconfig b/drivers/usb/typec/ucsi/Kconfig
> > > > > index 8f9c4b9f31f7..dee6069e46a2 100644
> > > > > --- a/drivers/usb/typec/ucsi/Kconfig
> > > > > +++ b/drivers/usb/typec/ucsi/Kconfig
> > > > > @@ -58,4 +58,11 @@ config UCSI_STM32G0
> > > > >    	  To compile the driver as a module, choose M here: the module will be
> > > > >    	  called ucsi_stm32g0.
> > > > > +config UCSI_PMIC_GLINK
> > > > > +	tristate "UCSI Qualcomm PMIC GLINK Interface Driver"
> > > > > +	depends on QCOM_PMIC_GLINK
> > > > 
> > > > No way to test build this code without this option?
> > > 
> > > Nop, the QCOM_PMIC_GLINK is a build dependency, this can't be removed
> > 
> > Then perhaps the QCOM_PMIC_GLINK code needs to be fixed up to allow for
> > it to be built on all platforms properly?  Otherwise you are
> > guaranteeing you will not get much, if any, build coverage and api
> > changes will cause this code to stagnate over time :(
> 
> The QCOM_PMIC_GLINK deps are:
>         depends on RPMSG
>         depends on TYPEC
>         depends on DRM
>         depends on NET
>         depends on OF
>         select AUXILIARY_BUS
>         select QCOM_PDR_HELPERS
> 
> What would be the changes needed here ?

I do not know, try unwinding it and maybe just adding a COMPILE_TEST
build option in a few places is all that is needed?

thanks,

greg k-h