linux-kernel - Re: [PATCH v6 3/3] edac: Add support for Amazon's Annapurna Labs L2 EDAC

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Date:   Wed, 9 Oct 2019 18:19:32 -0500
From:   Rob Herring <robh+dt@...nel.org>
To:     Hanna Hawa <hhhawa@...zon.com>
Cc:     Borislav Petkov <bp@...en8.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        James Morse <james.morse@....com>,
        Frank Rowand <frowand.list@...il.com>,
        David Miller <davem@...emloft.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linus Walleij <linus.walleij@...aro.org>, daniel@...earbox.net,
        "Paul E. McKenney" <paulmck@...ux.ibm.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-edac <linux-edac@...r.kernel.org>,
        devicetree@...r.kernel.org, "Woodhouse, David" <dwmw@...zon.co.uk>,
        benh@...zon.com, "Krupnik, Ronen" <ronenk@...zon.com>,
        Talel Shenhar <talel@...zon.com>,
        Jonathan Chocron <jonnyc@...zon.com>,
        "Hanoch, Uri" <hanochu@...zon.com>
Subject: Re: [PATCH v6 3/3] edac: Add support for Amazon's Annapurna Labs L2 EDAC

On Mon, Oct 7, 2019 at 10:18 AM Hanna Hawa <hhhawa@...zon.com> wrote:
>
> Adds support for Amazon's Annapurna Labs L2 EDAC driver to detect and
> report L2 errors.
>
> Signed-off-by: Hanna Hawa <hhhawa@...zon.com>
> ---
>  MAINTAINERS               |   5 +
>  drivers/edac/Kconfig      |   8 ++
>  drivers/edac/Makefile     |   1 +
>  drivers/edac/al_l2_edac.c | 251 ++++++++++++++++++++++++++++++++++++++
>  4 files changed, 265 insertions(+)
>  create mode 100644 drivers/edac/al_l2_edac.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 7887a62dc843..0eabcfcf91a9 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -748,6 +748,11 @@ M: Hanna Hawa <hhhawa@...zon.com>
>  S:     Maintained
>  F:     drivers/edac/al_l1_edac.c
>
> +AMAZON ANNAPURNA LABS L2 EDAC
> +M:     Hanna Hawa <hhhawa@...zon.com>
> +S:     Maintained
> +F:     drivers/edac/al_l2_edac.c
> +
>  AMAZON ANNAPURNA LABS THERMAL MMIO DRIVER
>  M:     Talel Shenhar <talel@...zon.com>
>  S:     Maintained
> diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
> index e8161d7c7469..cb394aff1cab 100644
> --- a/drivers/edac/Kconfig
> +++ b/drivers/edac/Kconfig
> @@ -82,6 +82,14 @@ config EDAC_AL_L1
>           for Amazon's Annapurna Labs SoCs.
>           This driver detects errors of L1 caches.
>
> +config EDAC_AL_L2
> +       tristate "Amazon's Annapurna Labs L2 EDAC"

I still think this should be an "A57 L2 ECC" driver, but if no one
cares I'll shut up and the 2nd person can rename everything.

> +       depends on ARCH_ALPINE

|| COMPILE_TEST

Maybe it needs an ARM64 dependency too in this case?

> +       help
> +         Support for L2 error detection and correction
> +         for Amazon's Annapurna Labs SoCs.
> +         This driver detects errors of L2 caches.
> +

> +
> +       ret = platform_driver_register(&al_l2_edac_driver);
> +       if (ret) {
> +               pr_err("Failed to register %s (%d)\n", DRV_NAME, ret);
> +               return ret;
> +       }
> +
> +       edac_l2_device = platform_device_register_simple(DRV_NAME, -1, NULL, 0);
> +       if (IS_ERR(edac_l2_device)) {
> +               pr_err("Failed to register EDAC AL L2 platform device\n");
> +               return PTR_ERR(edac_l2_device);
> +       }
> +
> +       return 0;
> +}
> +
> +static void __exit al_l2_exit(void)
> +{
> +       platform_device_unregister(edac_l2_device);
> +       platform_driver_unregister(&al_l2_edac_driver);
> +}
> +
> +late_initcall(al_l2_init);
> +module_exit(al_l2_exit);
> +
> +MODULE_LICENSE("GPL v2");
> +MODULE_AUTHOR("Hanna Hawa <hhhawa@...zon.com>");
> +MODULE_DESCRIPTION("Amazon's Annapurna Lab's L2 EDAC Driver");
> --
> 2.17.1
>