Messages in this thread | | | From | Alexandre Belloni <> | Subject | [PATCH v3 0/2] ARM: at91: properly handle LPDDR poweroff | Date | Tue, 25 Oct 2016 11:37:57 +0200 |
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Hi,
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.
Changes in v3: - removed COMPILE_TEST for sama5d2_shdwc as it is now ARM specific
Changes in v2: - Fix typos - Add a comment for the dummy read access of AT91_SHDW_CR - Properly set up pm_power_off in at91_poweroff_probe()
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(-)
-- 2.9.3
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