Nicolas Ferre 60b89f1928 ARM: at91: pm: cpu_idle: switch DDR to power-down mode ... On some DDR controllers, compatible with the sama5d3 one, the sequence to enter/exit/re-enter the self-refresh mode adds more constrains than what is currently written in the at91_idle driver. An actual access to the DDR chip is needed between exit and re-enter of this mode which is somehow difficult to implement. This sequence can completely hang the SoC. It is particularly experienced on parts which embed a L2 cache if the code run between IDLE calls fits in it... Moreover, as the intention is to enter and exit pretty rapidly from IDLE, the power-down mode is a good candidate. So now we use power-down instead of self-refresh. As we can simplify the code for sama5d3 compatible DDR controllers, we instantiate a new sama5d3_ddr_standby() function. Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Cc: <stable@vger.kernel.org> # v4.1+ Fixes: 017b5522d5 ("ARM: at91: Add new binding for sama5d3-ddramc") Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>		2017-03-14 11:09:50 +01:00
..
at91rm9200.c	arm: use of_platform_default_populate() to populate	2016-06-23 15:00:39 -05:00
at91sam9.c	arm: use of_platform_default_populate() to populate	2016-06-23 15:00:39 -05:00
generic.h	ARM: at91: remove useless includes and function prototypes	2016-02-17 17:53:02 +01:00
Kconfig	ARM: stop *MIGHT_HAVE_PCI* config from being selected redundantly	2016-09-21 22:45:05 +02:00
Makefile
pm.c	ARM: at91: pm: cpu_idle: switch DDR to power-down mode	2017-03-14 11:09:50 +01:00
pm.h	ARM: at91: pm: remove useless extern definition	2017-01-11 13:21:24 +01:00
pm_suspend.S	ARM: at91: pm: at91_pm_suspend_in_sram() must be 8-byte aligned	2015-10-19 22:58:44 +02:00
sama5.c	arm: use of_platform_default_populate() to populate	2016-06-23 15:00:39 -05:00
soc.c	ARM: at91: use chipid device for soc detection	2016-03-29 16:34:21 +02:00
soc.h	ARM: at91/soc: reference the whole sama5d2 family	2016-03-29 16:34:31 +02:00