| Message ID | 1393456190-7870-2-git-send-email-bcousson@baylibre.com (mailing list archive) |
|---|---|
| State | RFC |
| Headers | show |
On 26/02/14 23:09, Benoit Cousson wrote: > The CA15 cluster is capable of voltage scaling. Add the regulator > in the i2c3 node, to allow the generic CPUFreq driver to use it. > > Enable the i2c3 pin mux and the device node as well since the > da9210 is connected to that bus. > > Note: Vmin is set to 0.8v to allow experimentation only. > There is no guaranty that the CPUs will still work at this > voltage. > > Signed-off-by: Benoit Cousson <bcousson@baylibre.com> > --- > arch/arm/boot/dts/r8a7790-lager.dts | 21 +++++++++++++++++++++ > 1 file changed, 21 insertions(+) > > diff --git a/arch/arm/boot/dts/r8a7790-lager.dts b/arch/arm/boot/dts/r8a7790-lager.dts > index 6e99eb2..5f77e3a 100644 > --- a/arch/arm/boot/dts/r8a7790-lager.dts > +++ b/arch/arm/boot/dts/r8a7790-lager.dts > @@ -159,6 +159,11 @@ > renesas,groups = "qspi_ctrl", "qspi_data4"; > renesas,function = "qspi"; > }; > + > + i2c3_pins: i2c3 { > + renesas,groups = "i2c3"; > + renesas,function = "i2c3"; > + }; > }; I thought i2c3 was a single function set of pins?
diff --git a/arch/arm/boot/dts/r8a7790-lager.dts b/arch/arm/boot/dts/r8a7790-lager.dts index 6e99eb2..5f77e3a 100644 --- a/arch/arm/boot/dts/r8a7790-lager.dts +++ b/arch/arm/boot/dts/r8a7790-lager.dts @@ -159,6 +159,11 @@ renesas,groups = "qspi_ctrl", "qspi_data4"; renesas,function = "qspi"; }; + + i2c3_pins: i2c3 { + renesas,groups = "i2c3"; + renesas,function = "i2c3"; + }; }; ðer { @@ -240,3 +245,19 @@ cd-gpios = <&gpio3 22 GPIO_ACTIVE_LOW>; status = "okay"; }; + +&i2c3 { + pinctrl-names = "default"; + pinctrl-0 = <&i2c3_pins>; + status = "okay"; + + vdd_dvfs: regulator@68 { + compatible = "diasemi,da9210"; + reg = <0x68>; + + regulator-min-microvolt = <800000>; + regulator-max-microvolt = <1000000>; + regulator-boot-on; + regulator-always-on; + }; +};
The CA15 cluster is capable of voltage scaling. Add the regulator in the i2c3 node, to allow the generic CPUFreq driver to use it. Enable the i2c3 pin mux and the device node as well since the da9210 is connected to that bus. Note: Vmin is set to 0.8v to allow experimentation only. There is no guaranty that the CPUs will still work at this voltage. Signed-off-by: Benoit Cousson <bcousson@baylibre.com> --- arch/arm/boot/dts/r8a7790-lager.dts | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)