Fixes: http://bugs.elinux.org/issues/143 Commit 672e2b147 which introduced proper shutdown chose to let the PMIC go into sleep-state (aka "RTC-only mode") rather than off-state. This was fine for rev A5 on which that patch was tested, but since then two changes have been made to the power supply scheme: (rev A6) enable of the 3v3b regulator moved from LDO2 to LDO4 (3v3a) side-effect: 3v3b rail remains on in sleep-mode (also in off-mode when battery-powered) (rev A6A) am335x vdds supply moved from LDO3 to LDO1 side-effect: vdds remains supplied in sleep-mode As a result heavy leakage occurs from vdds (directly) and 3v3b (via i/o pins) to the 3v3a. The amount of current depends on external connections, but for example leaving a serial console cable connected in this state resulted in serious violation of am335x absolute maximum ratings, with potential for hardware damage. Reported-by: Matthijs van Duin <matthijsvanduin@xxxxxxxxx> Tested-by: Matthijs van Duin <matthijsvanduin@xxxxxxxxx> Signed-off-by: Robert Nelson <robertcnelson@xxxxxxxxx> Cc: Tony Lindgren <tony@xxxxxxxxxxx> Cc: Felipe Balbi <balbi@xxxxxx> Cc: Johan Hovold <johan@xxxxxxxxxx> --- arch/arm/boot/dts/am335x-bone-common.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/boot/dts/am335x-bone-common.dtsi b/arch/arm/boot/dts/am335x-bone-common.dtsi index c3255e0..7198b81 100644 --- a/arch/arm/boot/dts/am335x-bone-common.dtsi +++ b/arch/arm/boot/dts/am335x-bone-common.dtsi @@ -223,6 +223,8 @@ /include/ "tps65217.dtsi" &tps { + ti,pmic-shutdown-controller; + regulators { dcdc1_reg: regulator@0 { regulator-name = "vdds_dpr"; -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
