Re: [PATCH 2/2] arm64: dts: rockchip: Add basic support for orion-r68

[Heiko Stuebner <heiko@sntech.de>]

Hi Javier,

Am Freitag, 15. Januar 2016, 10:28:44 schrieb Javier Martinez Canillas:
> This is not a complete review but I just wanted to comment on two
> things that I noticed:

same for me for now :-)


> On Fri, Jan 15, 2016 at 10:06 AM, Matthias Brugger
> <matthias.bgg@gmail.com> wrote:
> 
> [snip]
> 
> > +       };
> > +
> > +       vcc_18: vcc18-regulator {
> > +               compatible = "regulator-fixed";
> > +               regulator-name = "vcc_18";
> > +               regulator-min-microvolt = <1800000>;
> > +               regulator-max-microvolt = <1800000>;
> > +               regulator-always-on;
> > +               regulator-boot-on;
> > +               vin-supply = <&vcc_sys>;
> > +       };
> > +
> > +       /* supplies both host and otg */
> > +       vcc_host: vcc-host-regulator {
> > +               compatible = "regulator-fixed";
> > +               gpio = <&gpio0 4 GPIO_ACTIVE_LOW>;
> > +               pinctrl-names = "default";
> > +               pinctrl-0 = <&host_vbus_drv>;
> > +               regulator-name = "vcc_host";
> > +               regulator-always-on;
> > +               regulator-boot-on;
> > +               vin-supply = <&vcc_sys>;
> > +       };
> > +
> > +       vccio_sd: vcc-io-sd-regulator {
> > +               regulator-name= "vccio_sd";
> > +               gpio = <&gpio0 9 GPIO_ACTIVE_LOW>;
> > +               regulator-min-microvolt = <3300000>;
> > +               regulator-max-microvolt = <3300000>;
> > +       };
> > +
> > +       vcc_sd: vcc-sd-regulator {
> > +               compatible = "regulator-fixed";
> > +               regulator-name = "vcc_sd";
> > +               gpio = <&gpio3 11 GPIO_ACTIVE_LOW>;
> > +               regulator-min-microvolt = <3300000>;
> > +               regulator-max-microvolt = <3300000>;
> > +               regulator-always-on;
> > +               regulator-boot-on;
> > +               vin-supply = <&vcc_io>;
> > +       };
> > +
> > +       vcc_io: vcc-io-regulator {
> > +               compatible = "regulator-fixed";
> > +               regulator-name = "vcc_io";
> > +               regulator-min-microvolt = <3300000>;
> > +               regulator-max-microvolt = <3300000>;
> > +               regulator-always-on;
> > +               regulator-boot-on;
> > +               vin-supply = <&vcc_sys>;
> > +       };
> > +
> > +       vcc_lan: vcc-lan-regulator {
> > +               compatible = "regulator-fixed";
> > +               regulator-name = "vcc_lan";
> > +               regulator-min-microvolt = <3300000>;
> > +               regulator-max-microvolt = <3300000>;
> > +               regulator-always-on;
> > +               regulator-boot-on;
> > +               vin-supply = <&vcc_io>;
> > +       };
> > +
> > +       vcc_sys: vcc-sys-regulator {
> > +               compatible = "regulator-fixed";
> > +               regulator-name = "vcc_sys";
> > +               regulator-min-microvolt = <5000000>;
> > +               regulator-max-microvolt = <5000000>;
> > +               regulator-always-on;
> > +               regulator-boot-on;
> > +       };
> > +
> > +       vccio_wl: vccio-wl-regulator {
> > +               compatible = "regulator-fixed";
> > +               regulator-name = "vccio_wl";
> > +               regulator-min-microvolt = <3300000>;
> > +               regulator-max-microvolt = <3300000>;
> > +               regulator-always-on;
> > +               regulator-boot-on;
> > +               vin-supply = <&vcc_io>;
> > +       };
> > +
> > +       vdd_10: vdd-10-regulator {
> > +               compatible = "regulator-fixed";
> > +               regulator-name = "vdd_10";
> > +               regulator-min-microvolt = <1000000>;
> > +               regulator-max-microvolt = <1000000>;
> > +               regulator-always-on;
> > +               regulator-boot-on;
> > +               vin-supply = <&vcc_sys>;
> > +       };
> > +};
> 
> There is only one regulator that is not marked as always-on. This will
> prevent the regulator subsystem to disable unused regulators. Do you
> really need all of them to be always-on?

I do believe the regulators should be more or less correct. Sadly there are 
no real schematics for that specific device available, but the reference 
design for rk3368-based tv-boxes uses a hirarchy of hard-wired individual 
regulators without any ability to control for most of them [aka always on].

And due to the r68 not sporting any different real pmic, I'd believe the 
Orion will most likely also follow that scheme.


Heiko