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. While all these patches are provided in a series, the clock, mtd, usb, pwm and mfd patch do not depend on each other. Changes in v2: * drop the IIO patch duplicating existing code * determine the number of programmable clocks to save dynamically * declare a required local variable in the tty/serial patch Changes in v3: * drop dev_printk changes for PMECC * rework the resume code for PMECC * improve comments on PMC clock handling Changes in v4: * fix a bug in the PMECC resume code Romain Izard (8): 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 ehci-atmel: Power down during suspend is normal pwm: atmel-tcb: Support backup mode atmel_flexcom: Support backup mode tty/serial: atmel: Prevent a warning on suspend drivers/clk/at91/clk-programmable.c | 2 + drivers/clk/at91/pmc.c | 63 ++++++++++++++++++++++++++----- drivers/clk/at91/pmc.h | 2 + drivers/mfd/atmel-flexcom.c | 65 ++++++++++++++++++++++++-------- drivers/mtd/nand/atmel/nand-controller.c | 3 ++ drivers/mtd/nand/atmel/pmecc.c | 17 +++++---- drivers/mtd/nand/atmel/pmecc.h | 1 + drivers/pwm/pwm-atmel-tcb.c | 63 ++++++++++++++++++++++++++++++- drivers/tty/serial/atmel_serial.c | 13 +++++++ drivers/usb/host/ehci-atmel.c | 3 +- 10 files changed, 196 insertions(+), 36 deletions(-) -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
