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SubjectRe: [PATCH v9 19/20] platform/x86: intel_pmc_ipc: Convert to MFD
On Thu, 16 Apr 2020, Mika Westerberg wrote:

> This driver only creates a bunch of platform devices sharing resources
> belonging to the PMC device. This is pretty much what MFD subsystem is
> for so move the driver there, renaming it to intel_pmc_bxt.c which
> should be more clear what it is.
>
> MFD subsystem provides nice helper APIs for subdevice creation so
> convert the driver to use those. Unfortunately the ACPI device includes
> separate resources for most of the subdevices so we cannot simply call
> mfd_add_devices() to create all of them but instead we need to call it
> separately for each device.
>
> The new MFD driver continues to expose two sysfs attributes that allow
> userspace to send IPC commands to the PMC/SCU to avoid breaking any
> existing applications that may use these. Generally this is bad idea so
> document this in the ABI documentation.
>
> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> ---
> .../ABI/obsolete/sysfs-driver-intel_pmc_bxt | 22 +
> arch/x86/include/asm/intel_pmc_ipc.h | 47 --
> arch/x86/include/asm/intel_telemetry.h | 1 +
> drivers/mfd/Kconfig | 16 +-
> drivers/mfd/Makefile | 1 +
> drivers/mfd/intel_pmc_bxt.c | 468 +++++++++++++
> drivers/platform/x86/Kconfig | 16 +-
> drivers/platform/x86/Makefile | 1 -
> drivers/platform/x86/intel_pmc_ipc.c | 645 ------------------
> .../platform/x86/intel_telemetry_debugfs.c | 12 +-
> drivers/platform/x86/intel_telemetry_pltdrv.c | 2 +
> drivers/usb/typec/tcpm/Kconfig | 2 +-
> drivers/watchdog/iTCO_wdt.c | 25 +-
> include/linux/mfd/intel_pmc_bxt.h | 53 ++
> include/linux/platform_data/itco_wdt.h | 11 +-
> 15 files changed, 602 insertions(+), 720 deletions(-)
> create mode 100644 Documentation/ABI/obsolete/sysfs-driver-intel_pmc_bxt
> delete mode 100644 arch/x86/include/asm/intel_pmc_ipc.h
> create mode 100644 drivers/mfd/intel_pmc_bxt.c
> delete mode 100644 drivers/platform/x86/intel_pmc_ipc.c
> create mode 100644 include/linux/mfd/intel_pmc_bxt.h

Looks good to me know.

Thanks for taking the time to realise my review comments.

For my own reference (apply this as-is to your sign-off block):

Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>

--
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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