[PATCH] ARM: config: Switch PXA27x platforms to use PXA RTC driver

[Rob Herring]

On Fri, Jul 24, 2015 at 12:02 PM, Rob Herring <robh at kernel.org> wrote:
> With the SA1100 and PXA RTC drivers be mutually exclusive and no
> longer sharing hardware, PXA27x/PXA3xx platforms must use the PXA RTC
> driver as the SA1100 platform device is no longer registered.
>
> This change should be almost transparent to userspace. Former users of
> pxa-rtc should be aware that 2 RTCs will be available on their kernels,
> rtc0 being sa1100-rtc and rtc1 being pxa-rtc. Any userspace relying on
> the fact that rtc0 was pxa-rtc should be fixed.
>
> As a consequence:
>  - the first reboot after the switch will have the wrong time,
>  - on dual boot platform where the other OS programs some logic into the
>    sa1100 rtc IP, a lack of fix in userspace, ie. a kernel changing
>    sa1100-rtc thinking it is pxa-rtc could have dire consequence, such
>    as wiping the other OS data partition.
>
> (Thanks to Robert Jarmik for help on the above commit text.)
>
> Signed-off-by: Rob Herring <robh at kernel.org>
> Cc: Robert Jarzmik <robert.jarzmik at free.fr>
> Cc: Daniel Mack <daniel at zonque.org>
> Cc: Haojian Zhuang <haojian.zhuang at gmail.com>
> Cc: Sergey Lapin <slapin at ossfans.org>
> Cc: Russell King <linux at arm.linux.org.uk>
> Cc: Mike Rapoport <mike at compulab.co.il>
> Cc: Philipp Zabel <philipp.zabel at gmail.com>
> ---
> PXA Maintainers,
>
> This is dependent on my SA1100 RTC cleanup series[1]. Please comment on
> this patch and that series. The full series is available from a git
> branch here[2]. I've rebased it to 4.2-rc3, but otherwise there is no
> change from v4.

Any comments on this? If not, I plan to send Alexandre a pull request
for this series this week.

Rob

>
> Rob
>
> [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/349262.html
> [2] git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git marvell/rtc
>
>  arch/arm/configs/cm_x2xx_defconfig  | 2 +-
>  arch/arm/configs/em_x270_defconfig  | 2 +-
>  arch/arm/configs/magician_defconfig | 2 +-
>  arch/arm/configs/palmz72_defconfig  | 2 +-
>  arch/arm/configs/pcm027_defconfig   | 2 +-
>  arch/arm/configs/trizeps4_defconfig | 2 +-
>  6 files changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/arch/arm/configs/cm_x2xx_defconfig b/arch/arm/configs/cm_x2xx_defconfig
> index dc01c04..3b32d5f 100644
> --- a/arch/arm/configs/cm_x2xx_defconfig
> +++ b/arch/arm/configs/cm_x2xx_defconfig
> @@ -157,7 +157,7 @@ CONFIG_LEDS_TRIGGERS=y
>  CONFIG_LEDS_TRIGGER_HEARTBEAT=y
>  CONFIG_RTC_CLASS=y
>  CONFIG_RTC_DRV_V3020=y
> -CONFIG_RTC_DRV_SA1100=y
> +CONFIG_RTC_DRV_PXA=y
>  CONFIG_EXT2_FS=y
>  CONFIG_EXT3_FS=y
>  CONFIG_INOTIFY=y
> diff --git a/arch/arm/configs/em_x270_defconfig b/arch/arm/configs/em_x270_defconfig
> index 4560c9c..8e10df7 100644
> --- a/arch/arm/configs/em_x270_defconfig
> +++ b/arch/arm/configs/em_x270_defconfig
> @@ -157,7 +157,7 @@ CONFIG_LEDS_TRIGGERS=y
>  CONFIG_LEDS_TRIGGER_HEARTBEAT=y
>  CONFIG_RTC_CLASS=y
>  CONFIG_RTC_DRV_V3020=y
> -CONFIG_RTC_DRV_SA1100=y
> +CONFIG_RTC_DRV_PXA=y
>  CONFIG_EXT2_FS=y
>  CONFIG_EXT3_FS=y
>  CONFIG_INOTIFY=y
> diff --git a/arch/arm/configs/magician_defconfig b/arch/arm/configs/magician_defconfig
> index 557dd29..a5b4920 100644
> --- a/arch/arm/configs/magician_defconfig
> +++ b/arch/arm/configs/magician_defconfig
> @@ -150,7 +150,7 @@ CONFIG_LEDS_TRIGGERS=y
>  CONFIG_LEDS_TRIGGER_BACKLIGHT=y
>  CONFIG_RTC_CLASS=y
>  CONFIG_RTC_DEBUG=y
> -CONFIG_RTC_DRV_SA1100=y
> +CONFIG_RTC_DRV_PXA=y
>  CONFIG_EXT2_FS=y
>  CONFIG_INOTIFY=y
>  CONFIG_MSDOS_FS=m
> diff --git a/arch/arm/configs/palmz72_defconfig b/arch/arm/configs/palmz72_defconfig
> index 4baa83c..83c135e 100644
> --- a/arch/arm/configs/palmz72_defconfig
> +++ b/arch/arm/configs/palmz72_defconfig
> @@ -67,7 +67,7 @@ CONFIG_MMC=y
>  CONFIG_MMC_DEBUG=y
>  CONFIG_MMC_PXA=y
>  CONFIG_RTC_CLASS=y
> -CONFIG_RTC_DRV_SA1100=y
> +CONFIG_RTC_DRV_PXA=y
>  CONFIG_EXT2_FS=y
>  CONFIG_EXT3_FS=y
>  # CONFIG_DNOTIFY is not set
> diff --git a/arch/arm/configs/pcm027_defconfig b/arch/arm/configs/pcm027_defconfig
> index 0a847d0..b5624e3 100644
> --- a/arch/arm/configs/pcm027_defconfig
> +++ b/arch/arm/configs/pcm027_defconfig
> @@ -82,7 +82,7 @@ CONFIG_MMC=y
>  CONFIG_MMC_PXA=y
>  CONFIG_RTC_CLASS=y
>  CONFIG_RTC_DRV_PCF8563=m
> -CONFIG_RTC_DRV_SA1100=m
> +CONFIG_RTC_DRV_PXA=m
>  CONFIG_EXT2_FS=m
>  CONFIG_EXT3_FS=m
>  # CONFIG_DNOTIFY is not set
> diff --git a/arch/arm/configs/trizeps4_defconfig b/arch/arm/configs/trizeps4_defconfig
> index 932ee4e..4bc8700 100644
> --- a/arch/arm/configs/trizeps4_defconfig
> +++ b/arch/arm/configs/trizeps4_defconfig
> @@ -177,7 +177,7 @@ CONFIG_NEW_LEDS=y
>  CONFIG_RTC_CLASS=y
>  # CONFIG_RTC_HCTOSYS is not set
>  CONFIG_RTC_DRV_PCF8583=m
> -CONFIG_RTC_DRV_SA1100=y
> +CONFIG_RTC_DRV_PXA=y
>  CONFIG_EXT2_FS=y
>  CONFIG_EXT2_FS_XATTR=y
>  CONFIG_EXT2_FS_POSIX_ACL=y
> --
> 2.1.0
>