linux-kernel - Re: [RFC PATCH v8 7/7] PCI / PM: Add support for the PCIe WAKE# signal for OF

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Date:   Thu, 26 Oct 2017 11:16:55 -0400
From:   Sinan Kaya <okaya@...eaurora.org>
To:     Jeffy Chen <jeffy.chen@...k-chips.com>,
        linux-kernel@...r.kernel.org, bhelgaas@...gle.com
Cc:     linux-pm@...r.kernel.org, tony@...mide.com,
        shawn.lin@...k-chips.com, briannorris@...omium.org,
        rjw@...ysocki.net, dianders@...omium.org, linux-pci@...r.kernel.org
Subject: Re: [RFC PATCH v8 7/7] PCI / PM: Add support for the PCIe WAKE#
 signal for OF

On 10/26/2017 9:28 AM, Jeffy Chen wrote:
>  drivers/pci/Makefile |   2 +-
>  drivers/pci/pci-of.c | 136 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 137 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/pci/pci-of.c
> 
> diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
> index 66a21acad952..4f76dbdb024c 100644
> --- a/drivers/pci/Makefile
> +++ b/drivers/pci/Makefile
> @@ -49,7 +49,7 @@ obj-$(CONFIG_PCI_ECAM) += ecam.o
>  
>  obj-$(CONFIG_XEN_PCIDEV_FRONTEND) += xen-pcifront.o
>  
> -obj-$(CONFIG_OF) += of.o
> +obj-$(CONFIG_OF) += of.o pci-of.o

If the intention is to push this to pci directory, this code needs to be made
platform agnostic by splitting into two pieces.

I think you can make this code common by abstracting the IRQ number and
have some generic code like pci-wake.c in pci directory without the of prefix
in this file.

Then, you can have some other OF specific code in the drivers/of directory
that reads the IRQ from OF and calls the common code in PCI directory.


-- 
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.