From: sre@kernel.org (Sebastian Reichel)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 0/2] ARM: at91: properly handle LPDDR poweroff
Date: Tue, 17 Jan 2017 00:26:46 +0100 [thread overview]
Message-ID: <20170116232646.ivoh5dhr56j4ihgp@earth> (raw)
In-Reply-To: <20161025093759.20913-1-alexandre.belloni@free-electrons.com>
Hi Alexandre,
On Tue, Oct 25, 2016 at 11:37:57AM +0200, Alexandre Belloni wrote:
> This patch set improves LPDDR support on SoCs using the Atmel MPDDR controller.
>
> LPDDR memories can only handle up to 400 uncontrolled power offs in their
> life. The proper power off sequence has to be applied before shutting down the
> SoC.
>
> I'm not too happy with the code duplication but this is a design choice
> that has been made before because both shutdown controllers are really
> different apart from the shutdown itself.
>
> I guess it is still better than slowly killing the LPDDR.
Sorry, I totally forgot about this one. I queued it into my for-next
branch using an immutable topic branch, in case you need the patch
against the arm include to also go through arm-soc. Feel free to use
or ignore it:
The following changes since commit 7ce7d89f48834cefece7804d38fc5d85382edf77:
Linux 4.10-rc1 (2016-12-25 16:13:08 -0800)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply.git tags/ib-psy-arm-at91-4.11
for you to fetch changes up to 0b0408745e7ff24757cbfd571d69026c0ddb803c:
power: reset: at91-poweroff: timely shutdown LPDDR memories (2017-01-16 23:21:33 +0100)
----------------------------------------------------------------
immutable branch between ARM at91 and power-supply for v4.11
----------------------------------------------------------------
Alexandre Belloni (2):
ARM: at91: define LPDDR types
power: reset: at91-poweroff: timely shutdown LPDDR memories
drivers/power/reset/Kconfig | 2 +-
drivers/power/reset/at91-poweroff.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
drivers/power/reset/at91-sama5d2_shdwc.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++++-
include/soc/at91/at91sam9_ddrsdr.h | 3 +++
4 files changed, 105 insertions(+), 3 deletions(-)
-- Sebastian
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prev parent reply other threads:[~2017-01-16 23:26 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-25 9:37 [PATCH v3 0/2] ARM: at91: properly handle LPDDR poweroff Alexandre Belloni
2016-10-25 9:37 ` [PATCH v3 1/2] ARM: at91: define LPDDR types Alexandre Belloni
2016-10-25 9:37 ` [PATCH v3 2/2] power/reset: at91-poweroff: timely shutdown LPDDR memories Alexandre Belloni
2017-01-16 23:26 ` Sebastian Reichel [this message]
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