linux-kernel - Re: [PATCH v2 2/2] PCI: j721e: Add support to build pci-j721e as module.

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Message-ID: <8dc31852-3d1c-860d-7844-15205f8fd6c6@ti.com>
Date:   Mon, 9 Jan 2023 09:23:37 +0530
From:   Vignesh Raghavendra <vigneshr@...com>
To:     Achal Verma <a-verma1@...com>, Tom Joseph <tjoseph@...ence.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczy_ski <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>
CC:     <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-omap@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Milind Parab <mparab@...ence.com>
Subject: Re: [PATCH v2 2/2] PCI: j721e: Add support to build pci-j721e as
 module.

Hi Achal,

On 08/01/23 21:27, Achal Verma wrote:
> Add support to build pci-j721e as module.
> 
> Signed-off-by: Achal Verma <a-verma1@...com>
> ---
>  drivers/pci/controller/cadence/Kconfig     | 10 +++++-----
>  drivers/pci/controller/cadence/pci-j721e.c |  6 +++++-
>  2 files changed, 10 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/pci/controller/cadence/Kconfig b/drivers/pci/controller/cadence/Kconfig
> index 693c41fe32ce..51edf723586c 100644
> --- a/drivers/pci/controller/cadence/Kconfig
> +++ b/drivers/pci/controller/cadence/Kconfig
> @@ -43,12 +43,13 @@ config PCIE_CADENCE_PLAT_EP
>  	  different vendors SoCs.
>  
>  config PCI_J721E
> -	bool
> +	tristate
> +	select PCIE_CADENCE_HOST
> +	select PCIE_CADENCE_EP
>  

Please don't use select when symbol being selected, depends on
additional configs

Documentation/kbuild/kconfig-language.rst::

select should be used with care. select will force
a symbol to a value without visiting the dependencies.
By abusing select you are able to select a symbol FOO even
if FOO depends on BAR that is not set.


>  config PCI_J721E_HOST
> -	bool "TI J721E PCIe platform host controller"
> +	tristate "TI J721E PCIe platform host controller"
>  	depends on OF
> -	select PCIE_CADENCE_HOST
>  	select PCI_J721E
>  	help
>  	  Say Y here if you want to support the TI J721E PCIe platform
> @@ -56,10 +57,9 @@ config PCI_J721E_HOST
>  	  core.
>  
>  config PCI_J721E_EP
> -	bool "TI J721E PCIe platform endpoint controller"
> +	tristate "TI J721E PCIe platform endpoint controller"
>  	depends on OF
>  	depends on PCI_ENDPOINT
> -	select PCIE_CADENCE_EP
>  	select PCI_J721E
>  	help
>  	  Say Y here if you want to support the TI J721E PCIe platform
> diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c
> index cc83a8925ce0..c4017fa6ae61 100644
> --- a/drivers/pci/controller/cadence/pci-j721e.c
> +++ b/drivers/pci/controller/cadence/pci-j721e.c
> @@ -13,6 +13,7 @@
>  #include <linux/irqchip/chained_irq.h>
>  #include <linux/irqdomain.h>
>  #include <linux/mfd/syscon.h>
> +#include <linux/module.h>
>  #include <linux/of.h>
>  #include <linux/of_device.h>
>  #include <linux/pci.h>
> @@ -565,4 +566,7 @@ static struct platform_driver j721e_pcie_driver = {
>  		.suppress_bind_attrs = true,
>  	},
>  };
> -builtin_platform_driver(j721e_pcie_driver);
> +module_platform_driver(j721e_pcie_driver);
> +
> +MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@...com>");
> +MODULE_LICENSE("GPL v2");

-- 
Regards
Vignesh