[PATCH v1 00/10] Various patches for SAMA5D2 backup mode

Romain Izard
2017-09-08T15:36:20Z

While the core of the backup mode for SAMA5D2 has been integrated in
v4.13, it is far from complete. Individual controllers in the chip have
drivers that do not support the reset of the registers during suspend,
and they need to be adapted to handle it.

The first patch uses the clock wakeup code from the prototype backup
mode instead of the version integrated in the mainline, as the mainline
version is not stable. During a test loop with two-second backup
suspend, the mainline version will hang in less than one day, whereas
the prototype version has been running the same test for more than a
week without hanging.

Romain Izard (10):
clk: at91: pmc: Wait for clocks when resuming
clk: at91: pmc: Save SCSR during suspend
clk: at91: pmc: Support backup for programmable clocks
mtd: nand: atmel: Avoid ECC errors when leaving backup mode
mtd: nand: atmel: Report PMECC failures as errors
ehci-atmel: Power down during suspend is normal
iio:adc:at91-sama5d2: Support backup mode
pwm: atmel-tcb: Support backup mode
atmel_flexcom: Support backup mode
tty/serial: atmel: Prevent a warning on suspend

drivers/clk/at91/pmc.c | 33 ++++++++++++------
drivers/iio/adc/at91-sama5d2_adc.c | 71 ++++++++++++++++++++++++++++++++------
drivers/mfd/atmel-flexcom.c | 65 ++++++++++++++++++++++++++--------
drivers/mtd/nand/atmel/pmecc.c | 15 ++++----
drivers/pwm/pwm-atmel-tcb.c | 63 +++++++++++++++++++++++++++++++--
drivers/tty/serial/atmel_serial.c | 13 +++++++
drivers/usb/host/ehci-atmel.c | 3 +-
7 files changed, 216 insertions(+), 47 deletions(-)

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2.11.0