linux-kernel - [PATCH 1/2] ata: clean up how architectures enable PATA_PLATFORM and PATA_OF

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Message-Id: <20220914142713.29351-1-lukas.bulwahn@gmail.com>
Date:   Wed, 14 Sep 2022 16:27:12 +0200
From:   Lukas Bulwahn <lukas.bulwahn@...il.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        linux-arm-kernel@...ts.infradead.org, linux-ide@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lukas Bulwahn <lukas.bulwahn@...il.com>
Subject: [PATCH 1/2] ata: clean up how architectures enable PATA_PLATFORM and PATA_OF_PLATFORM

There are two options for platform device PATA support:

  PATA_PLATFORM: Generic platform device PATA support
  PATA_OF_PLATFORM: OpenFirmware platform device PATA support

If an architecture allows the generic platform device PATA support, it
shall select HAVE_PATA_PLATFORM. Then, Generic platform device PATA support
is available and can be selected.

If an architecture has OpenFirmware support, which it indicates by
selecting OF, OpenFirmware platform device PATA support is available
and can be selected.
If OpenFirmware platform device PATA support is selected, then the
functionality (code files) from Generic platform device PATA support needs
to be integrated in the kernel build for the OpenFirmware platform device
PATA support to work. Select PATA_PLATFORM in PATA_OF_PLATFORM to make sure
the needed files are added in the build.

So, architectures with OpenFirmware support, do not need to additionally
select HAVE_PATA_PLATFORM. It is only needed by architecture that want the
non-OF pata-platform module.

Reflect this way of intended use of config symbols in the ata Kconfig and
adjust all architecture definitions.

This follows the suggestion from Arnd Bergmann (see Link).

Suggested-by: Arnd Bergmann <arnd@...db.de>
Link: https://lore.kernel.org/all/4b33bffc-2b6d-46b4-9f1d-d18e55975a5a@www.fastmail.com/

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@...il.com>
---
 arch/arm/mach-versatile/Kconfig | 1 -
 arch/arm64/Kconfig              | 1 -
 drivers/ata/Kconfig             | 6 +++---
 3 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mach-versatile/Kconfig b/arch/arm/mach-versatile/Kconfig
index 2ef226194c3a..b1519b4dc03a 100644
--- a/arch/arm/mach-versatile/Kconfig
+++ b/arch/arm/mach-versatile/Kconfig
@@ -256,7 +256,6 @@ menuconfig ARCH_VEXPRESS
 	select GPIOLIB
 	select HAVE_ARM_SCU if SMP
 	select HAVE_ARM_TWD if SMP
-	select HAVE_PATA_PLATFORM
 	select CLK_ICST
 	select NO_IOPORT_MAP
 	select PLAT_VERSATILE
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 51f3f07c3efd..036bd67e662e 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -194,7 +194,6 @@ config ARM64
 	select HAVE_IRQ_TIME_ACCOUNTING
 	select HAVE_KVM
 	select HAVE_NMI
-	select HAVE_PATA_PLATFORM
 	select HAVE_PERF_EVENTS
 	select HAVE_PERF_REGS
 	select HAVE_PERF_USER_STACK_DUMP
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 1c9f4fb2595d..c93d97455744 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -1102,8 +1102,7 @@ config PATA_PCMCIA
 	  If unsure, say N.
 
 config PATA_PLATFORM
-	tristate "Generic platform device PATA support"
-	depends on EXPERT || PPC || HAVE_PATA_PLATFORM
+	tristate "Generic platform device PATA support" if EXPERT || HAVE_PATA_PLATFORM
 	help
 	  This option enables support for generic directly connected ATA
 	  devices commonly found on embedded systems.
@@ -1112,7 +1111,8 @@ config PATA_PLATFORM
 
 config PATA_OF_PLATFORM
 	tristate "OpenFirmware platform device PATA support"
-	depends on PATA_PLATFORM && OF
+	depends on OF
+	select PATA_PLATFORM
 	help
 	  This option enables support for generic directly connected ATA
 	  devices commonly found on embedded systems with OpenFirmware
-- 
2.17.1