Re: [PATCH v5 7/8] acpi: add support for configfs

From: Mika Westerberg
Date: Thu Jul 07 2016 - 05:40:04 EST


On Fri, Jul 01, 2016 at 11:19:11PM +0300, Octavian Purdila wrote:
> Register the ACPI subsystem with configfs.
>
> Signed-off-by: Octavian Purdila <octavian.purdila@xxxxxxxxx>

Couple of nitpicks below but regardless of those,

Reviewed-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>

> ---
> Documentation/ABI/testing/configfs-acpi | 7 +++++
> MAINTAINERS | 1 +
> drivers/acpi/Kconfig | 9 ++++++
> drivers/acpi/Makefile | 1 +
> drivers/acpi/configfs.c | 53 +++++++++++++++++++++++++++++++++
> 5 files changed, 71 insertions(+)
> create mode 100644 Documentation/ABI/testing/configfs-acpi
> create mode 100644 drivers/acpi/configfs.c
>
> diff --git a/Documentation/ABI/testing/configfs-acpi b/Documentation/ABI/testing/configfs-acpi
> new file mode 100644
> index 0000000..17b19dc
> --- /dev/null
> +++ b/Documentation/ABI/testing/configfs-acpi
> @@ -0,0 +1,7 @@
> +What: /config/acpi
> +Date: July 2016
> +KernelVersion: 4.8
> +Contact: linux-acpi@xxxxxxxxxxxxxxx
> +Description:
> + This represents the ACPI subsystem entry point directory. It
> + contains sub-groups corresponding to ACPI configurable options.
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 16700e4..9c5365f 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -288,6 +288,7 @@ F: include/linux/acpi.h
> F: include/acpi/
> F: Documentation/acpi/
> F: Documentation/ABI/testing/sysfs-bus-acpi
> +F: Documentation/ABI/testing/configfs-acpi
> F: drivers/pci/*acpi*
> F: drivers/pci/*/*acpi*
> F: drivers/pci/*/*/*acpi*
> diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
> index b7e2e77..a039433 100644
> --- a/drivers/acpi/Kconfig
> +++ b/drivers/acpi/Kconfig
> @@ -521,4 +521,13 @@ config XPOWER_PMIC_OPREGION
>
> endif
>
> +config ACPI_CONFIGFS
> + tristate "ACPI configfs support"
> + select CONFIGFS_FS
> + default n

We default to n so this is not needed.

> + help
> + Select this option to enable support for ACPI configuration from
> + userspace. The configurable ACPI groups will be visible under
> + /config/acpi, assuming configfs is mounted under /config.
> +
> endif # ACPI
> diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
> index 251ce85..1dc2173 100644
> --- a/drivers/acpi/Makefile
> +++ b/drivers/acpi/Makefile
> @@ -99,5 +99,6 @@ obj-$(CONFIG_ACPI_EXTLOG) += acpi_extlog.o
> obj-$(CONFIG_PMIC_OPREGION) += pmic/intel_pmic.o
> obj-$(CONFIG_CRC_PMIC_OPREGION) += pmic/intel_pmic_crc.o
> obj-$(CONFIG_XPOWER_PMIC_OPREGION) += pmic/intel_pmic_xpower.o
> +obj-$(CONFIG_ACPI_CONFIGFS) += configfs.o
>
> video-objs += acpi_video.o video_detect.o
> diff --git a/drivers/acpi/configfs.c b/drivers/acpi/configfs.c
> new file mode 100644
> index 0000000..44a72ff
> --- /dev/null
> +++ b/drivers/acpi/configfs.c
> @@ -0,0 +1,53 @@
> +/*
> + * ACPI configfs support
> + *
> + * Copyright (c) 2015 Intel Corporation

It is 2016 now.