From: alexandre.belloni@free-electrons.com (Alexandre Belloni)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 0/2] ARM: at91: properly handle LPDDR poweroff
Date: Fri, 7 Oct 2016 18:34:25 +0200 [thread overview]
Message-ID: <20161007163427.11454-1-alexandre.belloni@free-electrons.com> (raw)
Hi,
This patch set improves LPDDR support on SoCs using the Atmel MPDDR controller.
LPDDR memoris 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 shitdown controler are really
different appart from the shutdown itself.
I guess it is still better than slowly killing the LPDDR.
Alexandre Belloni (2):
ARM: at91: define LPDDR types
power/reset: at91-poweroff: timely shitdown LPDDR memories
drivers/power/reset/at91-poweroff.c | 52 +++++++++++++++++++++++++++++++-
drivers/power/reset/at91-sama5d2_shdwc.c | 48 ++++++++++++++++++++++++++++-
include/soc/at91/at91sam9_ddrsdr.h | 3 ++
3 files changed, 101 insertions(+), 2 deletions(-)
--
2.9.3
next reply other threads:[~2016-10-07 16:34 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-07 16:34 Alexandre Belloni [this message]
2016-10-07 16:34 ` [PATCH 1/2] ARM: at91: define LPDDR types Alexandre Belloni
2016-10-07 16:34 ` [PATCH 2/2] power/reset: at91-poweroff: timely shitdown LPDDR memories Alexandre Belloni
2016-10-12 12:48 ` Jean-Jacques Hiblot
2016-10-13 11:03 ` Alexandre Belloni
2016-10-13 12:27 ` Jean-Jacques Hiblot
2016-10-13 12:39 ` Richard Genoud
2016-10-13 13:47 ` Alexandre Belloni
2016-10-13 15:04 ` Jean-Jacques Hiblot
2016-10-10 6:00 ` [PATCH 0/2] ARM: at91: properly handle LPDDR poweroff Alexander Stein
2016-10-12 11:17 ` Alexandre Belloni
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