linux-kernel - Re: [PATCH] ACPI / PMIC: xpower: fix IOSF

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Date:   Wed, 7 Nov 2018 13:22:35 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Arnd Bergmann <arnd@...db.de>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Hans de Goede <hdegoede@...hat.com>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ACPI / PMIC: xpower: fix IOSF_MBI dependency

On Fri, Nov 2, 2018 at 12:07 PM Arnd Bergmann <arnd@...db.de> wrote:
>
> We still get a link failure with IOSF_MBI=m when the xpower driver
> is built-in:
>
> drivers/acpi/pmic/intel_pmic_xpower.o: In function `intel_xpower_pmic_update_power':
> intel_pmic_xpower.c:(.text+0x4f2): undefined reference to `iosf_mbi_block_punit_i2c_access'
> intel_pmic_xpower.c:(.text+0x5e2): undefined reference to `iosf_mbi_unblock_punit_i2c_access'
>
> This makes the dependency stronger, so we can only build when IOSF_MBI
> is built-in.
>
> Fixes: 6a9b593d4b6f ("ACPI / PMIC: xpower: Add depends on IOSF_MBI to Kconfig entry")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  drivers/acpi/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
> index 18851e7eedd5..31a3c4a03f61 100644
> --- a/drivers/acpi/Kconfig
> +++ b/drivers/acpi/Kconfig
> @@ -514,7 +514,7 @@ config CRC_PMIC_OPREGION
>
>  config XPOWER_PMIC_OPREGION
>         bool "ACPI operation region support for XPower AXP288 PMIC"
> -       depends on MFD_AXP20X_I2C && IOSF_MBI
> +       depends on MFD_AXP20X_I2C && IOSF_MBI=y
>         help
>           This config adds ACPI operation region support for XPower AXP288 PMIC.
>
> --

At this point I'm inclined to apply the patch as is as a short-term
fix and improvements can be made on top of it.

Any objections?