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Subject: Re: [PATCH v7 1/5] platform/x86/intel: intel_pmc_core: Move
 intel_pmc_core* files to pmc subfolder
To:     Gayatri Kammela <gayatri.kammela@intel.com>,
        platform-driver-x86@vger.kernel.org
Cc:     mgross@linux.intel.com, irenic.rajneesh@gmail.com,
        andriy.shevchenko@linux.intel.com, vicamo.yang@canonical.com,
        srinivas.pandruvada@intel.com, david.e.box@intel.com,
        chao.qin@intel.com, linux-kernel@vger.kernel.org,
        tamar.mashiah@intel.com, gregkh@linuxfoundation.org,
        rajatja@google.com, Shyam-sundar.S-k@amd.com,
        Alexander.Deucher@amd.com, mlimonci@amd.com,
        Andy Shevchenko <andy.shevchenko@gmail.com>
References: <cover.1629091915.git.gayatri.kammela@intel.com>
 <81b6292e50af54fb7eeabfefde6f4a3d283b0b96.1629091915.git.gayatri.kammela@intel.com>
From:   Hans de Goede <hdegoede@redhat.com>
Message-ID: <c07aa6a9-2cf9-db15-bf8c-9e6ac536a521@redhat.com>
Date:   Tue, 17 Aug 2021 20:47:23 +0200
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Hi,

On 8/16/21 6:58 PM, Gayatri Kammela wrote:
> As part of collecting Intel x86 specific drivers in their own
> folder, move intel_pmc_core* files to its own subfolder there.
> 
> Cc: Chao Qin <chao.qin@intel.com>
> Cc: Srinivas Pandruvada <srinivas.pandruvada@intel.com>
> Cc: David Box <david.e.box@intel.com>
> Cc: You-Sheng Yang <vicamo.yang@canonical.com>
> Cc: Hans de Goede <hdegoede@redhat.com>
> Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Acked-by: Rajneesh Bhardwaj <irenic.rajneesh@gmail.com>
> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> Signed-off-by: Gayatri Kammela <gayatri.kammela@intel.com>
> ---
>  MAINTAINERS                                   |  2 +-
>  drivers/platform/x86/Kconfig                  | 21 ------------------
>  drivers/platform/x86/Makefile                 |  1 -
>  drivers/platform/x86/intel/Kconfig            |  1 +
>  drivers/platform/x86/intel/Makefile           |  1 +
>  drivers/platform/x86/intel/pmc/Kconfig        | 22 +++++++++++++++++++
>  drivers/platform/x86/intel/pmc/Makefile       |  6 +++++
>  .../{intel_pmc_core.c => intel/pmc/core.c}    |  2 +-
>  .../{intel_pmc_core.h => intel/pmc/core.h}    |  0
>  .../pmc/core_platform.c}                      |  0
>  10 files changed, 32 insertions(+), 24 deletions(-)
>  create mode 100644 drivers/platform/x86/intel/pmc/Kconfig
>  create mode 100644 drivers/platform/x86/intel/pmc/Makefile
>  rename drivers/platform/x86/{intel_pmc_core.c => intel/pmc/core.c} (99%)
>  rename drivers/platform/x86/{intel_pmc_core.h => intel/pmc/core.h} (100%)
>  rename drivers/platform/x86/{intel_pmc_core_pltdrv.c => intel/pmc/core_platform.c} (100%)
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index fd25e4ecf0b9..5e118faf8018 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -9477,7 +9477,7 @@ M:	David E Box <david.e.box@intel.com>
>  L:	platform-driver-x86@vger.kernel.org
>  S:	Maintained
>  F:	Documentation/ABI/testing/sysfs-platform-intel-pmc
> -F:	drivers/platform/x86/intel_pmc_core*
> +F:	drivers/platform/x86/intel/pmc/core*
>  
>  INTEL PMIC GPIO DRIVERS
>  M:	Andy Shevchenko <andy@kernel.org>
> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> index d12db6c316ea..c4ee38eba44b 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -1187,27 +1187,6 @@ config INTEL_MRFLD_PWRBTN
>  	  To compile this driver as a module, choose M here: the module
>  	  will be called intel_mrfld_pwrbtn.
>  
> -config INTEL_PMC_CORE
> -	tristate "Intel PMC Core driver"
> -	depends on PCI
> -	depends on ACPI
> -	help
> -	  The Intel Platform Controller Hub for Intel Core SoCs provides access
> -	  to Power Management Controller registers via various interfaces. This
> -	  driver can utilize debugging capabilities and supported features as
> -	  exposed by the Power Management Controller. It also may perform some
> -	  tasks in the PMC in order to enable transition into the SLPS0 state.
> -	  It should be selected on all Intel platforms supported by the driver.
> -
> -	  Supported features:
> -		- SLP_S0_RESIDENCY counter
> -		- PCH IP Power Gating status
> -		- LTR Ignore / LTR Show
> -		- MPHY/PLL gating status (Sunrisepoint PCH only)
> -		- SLPS0 Debug registers (Cannonlake/Icelake PCH)
> -		- Low Power Mode registers (Tigerlake and beyond)
> -		- PMC quirks as needed to enable SLPS0/S0ix
> -
>  config INTEL_PMT_CLASS
>  	tristate
>  	help
> diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
> index 7ee369aab10d..43d36f8c36f1 100644
> --- a/drivers/platform/x86/Makefile
> +++ b/drivers/platform/x86/Makefile
> @@ -128,7 +128,6 @@ obj-$(CONFIG_INTEL_UNCORE_FREQ_CONTROL)		+= intel-uncore-frequency.o
>  obj-$(CONFIG_INTEL_BXTWC_PMIC_TMU)	+= intel_bxtwc_tmu.o
>  obj-$(CONFIG_INTEL_CHTDC_TI_PWRBTN)	+= intel_chtdc_ti_pwrbtn.o
>  obj-$(CONFIG_INTEL_MRFLD_PWRBTN)	+= intel_mrfld_pwrbtn.o
> -obj-$(CONFIG_INTEL_PMC_CORE)		+= intel_pmc_core.o intel_pmc_core_pltdrv.o

This Makefile line will build 2 separate .ko files: intel_pmc_core.ko and
intel_pmc_core_pltdrv.ko when CONFIG_INTEL_PMC_CORE=m

>  obj-$(CONFIG_INTEL_PMT_CLASS)		+= intel_pmt_class.o
>  obj-$(CONFIG_INTEL_PMT_TELEMETRY)	+= intel_pmt_telemetry.o
>  obj-$(CONFIG_INTEL_PMT_CRASHLOG)	+= intel_pmt_crashlog.o

<snip>

> diff --git a/drivers/platform/x86/intel/pmc/Makefile b/drivers/platform/x86/intel/pmc/Makefile
> new file mode 100644
> index 000000000000..c92e66846a4a
> --- /dev/null
> +++ b/drivers/platform/x86/intel/pmc/Makefile
> @@ -0,0 +1,6 @@
> +# SPDX-License-Identifier: GPL-2.0
> +#
> +
> +obj-$(CONFIG_INTEL_PMC_CORE)	+= intel_pmc_core.o
> +intel_pmc_core-objs		:= core.o \
> +				   core_platform.o

Whereas this will now build a single intel_pmc_core.ko containing both object files,
but the 2 .c files have:

module_platform_driver(pmc_core_driver);
(which is a macro expanding to a module_init + module_exit function)

resp.

module_init(pmc_core_platform_init);
module_exit(pmc_core_platform_exit);

So now we have 2 module_init (and _exit) functions in a single .ko
file and the build will fail, not good.

Also instead of "intel_pmc_core-objs :=" you should use "intel_pmc_core-y :="

And this series is based on 5.14-rc6, causing it to not apply
because the pmt driver has already been moved to
drivers/platform/x86 and this patch is using a base which
is missing that move.

pdx86 patches should be based on:

https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans

Please make sure the next version is based on my review-hans branch,
there are some other intel driver renames in flight (and e.g. the
pmt one has already landed) and I would like to be able to apply
this without needing to manually resolve conflicts.

Regards,

Hans


> diff --git a/drivers/platform/x86/intel_pmc_core.c b/drivers/platform/x86/intel/pmc/core.c
> similarity index 99%
> rename from drivers/platform/x86/intel_pmc_core.c
> rename to drivers/platform/x86/intel/pmc/core.c
> index b0e486a6bdfb..f9de78b08e5d 100644
> --- a/drivers/platform/x86/intel_pmc_core.c
> +++ b/drivers/platform/x86/intel/pmc/core.c
> @@ -31,7 +31,7 @@
>  #include <asm/msr.h>
>  #include <asm/tsc.h>
>  
> -#include "intel_pmc_core.h"
> +#include "core.h"
>  
>  #define ACPI_S0IX_DSM_UUID		"57a6512e-3979-4e9d-9708-ff13b2508972"
>  #define ACPI_GET_LOW_MODE_REGISTERS	1
> diff --git a/drivers/platform/x86/intel_pmc_core.h b/drivers/platform/x86/intel/pmc/core.h
> similarity index 100%
> rename from drivers/platform/x86/intel_pmc_core.h
> rename to drivers/platform/x86/intel/pmc/core.h
> diff --git a/drivers/platform/x86/intel_pmc_core_pltdrv.c b/drivers/platform/x86/intel/pmc/core_platform.c
> similarity index 100%
> rename from drivers/platform/x86/intel_pmc_core_pltdrv.c
> rename to drivers/platform/x86/intel/pmc/core_platform.c
>