On Wed, Aug 14, 2013 at 1:59 AM, Gururaja Hebbar <gururaja.hebbar@xxxxxx> wrote: > On 8/14/2013 3:50 AM, Russ Dill wrote: >> Changes since v1: >> * Rebased onto new am335x PM branch >> >> This adds a sleep and wake sequence to set the VDD core voltage to the >> OPP50 level, 0.950V. This saves power during suspend. The sequences are >> specific to the Beaglebone layout and PMIC, the TPS65217. The sequences >> are written out by the Cortex-M3. >> >> Signed-off-by: Russ Dill <Russ.Dill@xxxxxx> >> --- >> arch/arm/boot/dts/am335x-bone.dts | 25 ++++++++++++++++++++++++- >> 1 file changed, 24 insertions(+), 1 deletion(-) >> >> diff --git a/arch/arm/boot/dts/am335x-bone.dts b/arch/arm/boot/dts/am335x-bone.dts >> index 444b4ed..3f6528d 100644 >> --- a/arch/arm/boot/dts/am335x-bone.dts >> +++ b/arch/arm/boot/dts/am335x-bone.dts >> @@ -127,10 +127,33 @@ >> status = "okay"; >> clock-frequency = <400000>; >> >> + /* Set OPP50 (0.95V) for VDD core */ >> + sleep_sequence = /bits/ 8 < > > For user readability, can you mention the PMIC used here as a comment? Sounds like a good modification, will do. >> + 0x02 0x24 0x0b 0x6d /* Password unlock 1 */ >> + 0x02 0x24 0x10 0x02 /* Set DCDC3 to 0.95V */ >> + 0x02 0x24 0x0b 0x6d /* Password unlock 2 */ >> + 0x02 0x24 0x10 0x02 /* Set DCDC3 to 0.95V */ >> + 0x02 0x24 0x0b 0x6c /* Password unlock 1 */ >> + 0x02 0x24 0x11 0x86 /* Apply DCDC changes */ >> + 0x02 0x24 0x0b 0x6c /* Password unlock 2 */ >> + 0x02 0x24 0x11 0x86 /* Apply DCDC changes */ >> + >; >> + >> + /* Set OPP100 (1.10V) for VDD core */ >> + wake_sequence = /bits/ 8 < >> + 0x02 0x24 0x0b 0x6d /* Password unlock 1 */ >> + 0x02 0x24 0x10 0x08 /* Set DCDC3 to 1.1V */ >> + 0x02 0x24 0x0b 0x6d /* Password unlock 2 */ >> + 0x02 0x24 0x10 0x08 /* Set DCDC3 to 1.1V */ >> + 0x02 0x24 0x0b 0x6c /* Password unlock 1 */ >> + 0x02 0x24 0x11 0x86 /* Apply DCDC changes */ >> + 0x02 0x24 0x0b 0x6c /* Password unlock 2 */ >> + 0x02 0x24 0x11 0x86 /* Apply DCDC changes */ >> + >; >> + >> tps: tps@24 { >> reg = <0x24>; >> }; >> - >> }; >> }; >> >> > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- 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