linux-kernel - Re: [PATCH] PCI: keystone: Fix build error while only CONFIG_PCI

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Date:   Tue, 23 Apr 2019 10:43:37 +0100
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        YueHaibing <yuehaibing@...wei.com>, robh@...nel.org,
        l.stach@...gutronix.de, andrew.smirnov@...il.com,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH] PCI: keystone: Fix build error while only
 CONFIG_PCI_KEYSTONE is set

On Mon, Apr 22, 2019 at 08:26:17AM -0500, Bjorn Helgaas wrote:
> On Mon, Apr 22, 2019 at 01:19:53PM +0530, Kishon Vijay Abraham I wrote:
> > Hi Bjorn,
> > ...
> 
> > Sometime back Niklas had fixed this for DRA7xx in
> > 
> > commit b052835c63857e13d9ada3ebc57a8f9e1d124f3a
> > Author: Niklas Cassel <niklas.cassel@...s.com>
> > Date:   Wed Dec 20 00:29:28 2017 +0100
> > 
> >     PCI: dwc: dra7xx: Refactor Kconfig and Makefile handling for host/ep mode
> > 
> >     Refactor the Kconfig and Makefile handling for host/ep mode, since
> >     the previous handling was a bit unorthodox and would have been a bit
> >     bloated once more DWC based controllers added support for ep mode.
> > 
> >     Signed-off-by: Niklas Cassel <niklas.cassel@...s.com>
> >     Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
> >     Acked-by: Kishon Vijay Abraham I <kishon@...com>
> > 
> > Something similar is applicable for Keystone too as you mentioned without
> > selecting PCI_KEYSTONE_HOST or PCI_KEYSTONE_EP, compiling pci-keystone.c
> > doesn't make sense.
> > 
> > Please see if below looks okay to you. This can be merged with "PCI:
> > keystone:Add support for PCIe EP in AM654x Platforms"). Let me know if I have
> > to send it separately with Fixes tag.
> 
> Lorenzo merged that commit, so I assume he'll take care of this.

I will squash it in and rebuild the branch, thanks.

Lorenzo

> > 8<---------------------------------------------------------
> > From 8fba36048112cf72c49996fc47fd808534bf9689 Mon Sep 17 00:00:00 2001
> > From: Kishon Vijay Abraham I <kishon@...com>
> > Date: Mon, 22 Apr 2019 11:42:32 +0530
> > Subject: [PATCH] PCI: keystone: Refactor Kconfig for RC/EP mode
> > 
> > Do not allow PCI_KEYSTONE to be visible to user and let user visible
> > CONFIG symbols PCI_KEYSTONE_HOST and PCI_KEYSTONE_EP select
> > PCI_KEYSTONE. This will let pci-keystone.c to be compiled only when
> > either PCI_KEYSTONE_HOST or PCI_KEYSTONE_EP is selected.
> > 
> > Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
> > ---
> >  drivers/pci/controller/dwc/Kconfig | 24 +++++++++++-------------
> >  1 file changed, 11 insertions(+), 13 deletions(-)
> > 
> > diff --git a/drivers/pci/controller/dwc/Kconfig
> > b/drivers/pci/controller/dwc/Kconfig
> > index b450ad2823a5..90618233d15b 100644
> > --- a/drivers/pci/controller/dwc/Kconfig
> > +++ b/drivers/pci/controller/dwc/Kconfig
> > @@ -103,34 +103,32 @@ config PCIE_SPEAR13XX
> >  	  Say Y here if you want PCIe support on SPEAr13XX SoCs.
> > 
> >  config PCI_KEYSTONE
> > -	bool "TI Keystone PCIe controller"
> > -	depends on ARCH_KEYSTONE || ARCH_K3 || ((ARM || ARM64) && COMPILE_TEST)
> > -	help
> > -	  Say Y here if you want to enable PCI controller support on Keystone
> > -	  SoCs. The PCI controller on Keystone is based on DesignWare hardware
> > -	  and therefore the driver re-uses the DesignWare core functions to
> > -	  implement the driver.
> > -
> > -if PCI_KEYSTONE
> > +	bool
> > 
> >  config PCI_KEYSTONE_HOST
> >  	bool "PCI Keystone Host Mode"
> > +	depends on ARCH_KEYSTONE || ARCH_K3 || ((ARM || ARM64) && COMPILE_TEST)
> >  	depends on PCI_MSI_IRQ_DOMAIN
> >  	select PCIE_DW_HOST
> > +	select PCI_KEYSTONE
> >  	default y
> >  	help
> >  	 Enables support for the PCIe controller in the Keystone SoC to work in
> > -	 host mode.
> > +	 host mode. The PCI controller on Keystone is based on DesignWare hardware
> > +	 and therefore the driver re-uses the DesignWare core functions to
> > +	 implement the driver.
> > 
> >  config PCI_KEYSTONE_EP
> >  	bool "PCI Keystone Endpoint Mode"
> > +	depends on ARCH_KEYSTONE || ARCH_K3 || ((ARM || ARM64) && COMPILE_TEST)
> >  	depends on PCI_ENDPOINT
> >  	select PCIE_DW_EP
> > +	select PCI_KEYSTONE
> >  	help
> >  	 Enables support for the PCIe controller in the Keystone SoC to work in
> > -	 endpoint mode.
> > -
> > -endif
> > +	 endpoint mode. The PCI controller on Keystone is based on DesignWare hardware
> > +	 and therefore the driver re-uses the DesignWare core functions to
> > +	 implement the driver.
> > 
> >  config PCI_LAYERSCAPE
> >  	bool "Freescale Layerscape PCIe controller"
> > -- 
> > 2.17.1