| Message ID | 20180706085210.17952-9-andre.przywara@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
于 2018年7月6日 GMT+08:00 下午4:52:08, Andre Przywara <andre.przywara@arm.com> 写到: >VCC-PE is driven the AXP's ALDO1 regulator, and is connected to the I2C >pins on the RPi2 header. One would expect 3.3 V there, so enable this >regulator and set it to this voltage. However, 3.3V will break the DVP camera (although not yet supported). > >Signed-off-by: Andre Przywara <andre.przywara@arm.com> >--- > arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts | 7 +++++++ > 1 file changed, 7 insertions(+) > >diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts >b/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts >index bd35a093e6cd..0439cff685d6 100644 >--- a/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts >+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts >@@ -126,6 +126,13 @@ > > #include "axp803.dtsi" > >+®_aldo1 { >+ regulator-always-on; >+ regulator-min-microvolt = <3300000>; >+ regulator-max-microvolt = <3300000>; >+ regulator-name = "vcc-pe"; >+}; >+ > ®_aldo2 { > regulator-always-on; > regulator-min-microvolt = <1800000>;
Hi, On 06/07/18 10:03, Icenowy Zheng wrote: > > > 于 2018年7月6日 GMT+08:00 下午4:52:08, Andre Przywara <andre.przywara@arm.com> 写到: >> VCC-PE is driven the AXP's ALDO1 regulator, and is connected to the I2C >> pins on the RPi2 header. One would expect 3.3 V there, so enable this >> regulator and set it to this voltage. > > However, 3.3V will break the DVP camera (although not yet > supported). Interesting, so what would the supposed voltage be here? The NanoPi-A64 schematic at least mentions 3.3V for the *supply* pins on that connector and connects VDD_SYS_3.3V to that. Happy to put any other value for the I/O here, but it would be problematic to see a different voltage on those two I2C pins on the RPi2 header. Cheers, Andre. >> Signed-off-by: Andre Przywara <andre.przywara@arm.com> >> --- >> arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts | 7 +++++++ >> 1 file changed, 7 insertions(+) >> >> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts >> b/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts >> index bd35a093e6cd..0439cff685d6 100644 >> --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts >> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts >> @@ -126,6 +126,13 @@ >> >> #include "axp803.dtsi" >> >> +®_aldo1 { >> + regulator-always-on; >> + regulator-min-microvolt = <3300000>; >> + regulator-max-microvolt = <3300000>; >> + regulator-name = "vcc-pe"; >> +}; >> + >> ®_aldo2 { >> regulator-always-on; >> regulator-min-microvolt = <1800000>;
On Fri, Jul 6, 2018 at 5:39 PM, Andre Przywara <andre.przywara@arm.com> wrote: > Hi, > > On 06/07/18 10:03, Icenowy Zheng wrote: >> >> >> 于 2018年7月6日 GMT+08:00 下午4:52:08, Andre Przywara <andre.przywara@arm.com> 写到: >>> VCC-PE is driven the AXP's ALDO1 regulator, and is connected to the I2C >>> pins on the RPi2 header. One would expect 3.3 V there, so enable this >>> regulator and set it to this voltage. >> >> However, 3.3V will break the DVP camera (although not yet >> supported). > > Interesting, so what would the supposed voltage be here? The NanoPi-A64 > schematic at least mentions 3.3V for the *supply* pins on that connector > and connects VDD_SYS_3.3V to that. Happy to put any other value for the > I/O here, but it would be problematic to see a different voltage on > those two I2C pins on the RPi2 header. AFAIK a whole bunch of cameras use 2.8V as their I/O supply voltage. This is probably separate from any other core or peripheral voltages supplied. ChenYu > Cheers, > Andre. > >>> Signed-off-by: Andre Przywara <andre.przywara@arm.com> >>> --- >>> arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts | 7 +++++++ >>> 1 file changed, 7 insertions(+) >>> >>> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts >>> b/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts >>> index bd35a093e6cd..0439cff685d6 100644 >>> --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts >>> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts >>> @@ -126,6 +126,13 @@ >>> >>> #include "axp803.dtsi" >>> >>> +®_aldo1 { >>> + regulator-always-on; >>> + regulator-min-microvolt = <3300000>; >>> + regulator-max-microvolt = <3300000>; >>> + regulator-name = "vcc-pe"; >>> +}; >>> + >>> ®_aldo2 { >>> regulator-always-on; >>> regulator-min-microvolt = <1800000>;
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts index bd35a093e6cd..0439cff685d6 100644 --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts @@ -126,6 +126,13 @@ #include "axp803.dtsi" +®_aldo1 { + regulator-always-on; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + regulator-name = "vcc-pe"; +}; + ®_aldo2 { regulator-always-on; regulator-min-microvolt = <1800000>;
VCC-PE is driven the AXP's ALDO1 regulator, and is connected to the I2C pins on the RPi2 header. One would expect 3.3 V there, so enable this regulator and set it to this voltage. Signed-off-by: Andre Przywara <andre.przywara@arm.com> --- arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts | 7 +++++++ 1 file changed, 7 insertions(+)