Re: [PATCH v2 2/2] mfd: axp20c-i2c: Select designware i2c-bus driver on x86

From: Lee Jones
Date: Mon Apr 03 2017 - 06:27:56 EST


On Wed, 29 Mar 2017, Hans de Goede wrote:

> On x86 the axp288 PMIC provides an ACPI OPRegion handler, which must be
> available before other drivers using it are loaded, which can only be
> ensured if the mfd, opregion driver and i2c-bus drivers are built in.
>
> The opregion driver is a bool depending on MFD_AXP20X_I2C ensuring that
> it will be builtin if the opregion driver is to be enabled, add a
> select for the designware-options to ensure those get built in too.
>
> This fixes errors like these during boot:
>
> mmc0: SDHCI controller on ACPI [80860F14:00] using ADMA
> ACPI Error: No handler for Region [REGS] (ffff93543b0cc3a8) [UserDefinedRegion]
> ACPI Error: Region UserDefinedRegion (ID=143) has no handler (20170119/exfldio-2
> ACPI Error: Method parse/execution failed [\_SB.PCI0.I2C7.PMI5.GET] (Node ffff93
> ACPI Error: Method parse/execution failed [\_SB.PCI0.SHC1._PS0] (Node ffff93543b
> acpi 80860F14:02: Failed to change power state to D0
>
> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
> ---
> Changes in v2:
> -Fix Kconfig depends and selects to fix warning reported by kbuild test robot

Looks like there is still an issue.

> -Improve commit msg (add example of ACPI errors this avoids)
> ---
> drivers/mfd/Kconfig | 13 ++++++++++++-
> 1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 4eb044e..ed2616c 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -148,7 +148,14 @@ config MFD_AXP20X_I2C
> tristate "X-Powers AXP series PMICs with I2C"
> select MFD_AXP20X
> select REGMAP_I2C
> - depends on I2C
> + # In order for the ACPI Opregion this provides on x86 to be available
> + # the i2c-adapter driver must be builtin too, select it and its deps
> + depends on X86=n || (ACPI && HAS_IOMEM)
> + select I2C
> + select IOSF_MBI if X86
> + select COMMON_CLK if X86
> + select I2C_DESIGNWARE_PLATFORM if X86
> + select I2C_DESIGNWARE_BAYTRAIL if X86
> help
> If you say Y here you get support for the X-Powers AXP series power
> management ICs (PMICs) controlled with I2C.
> @@ -156,6 +163,10 @@ config MFD_AXP20X_I2C
> components like regulators or the PEK (Power Enable Key) under the
> corresponding menus.
>
> + Note on x86 this provides an ACPI Opregion, so this must be 'y'
> + (builtin) and not a module, as the OPregion must be available as
> + soon as possible.
> +
> config MFD_AXP20X_RSB
> tristate "X-Powers AXP series PMICs with RSB"
> select MFD_AXP20X

--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org â Open source software for ARM SoCs
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