On Wed, 08 Oct 2014, Johannes Pointner wrote:
> 2014-10-06 23:22 GMT+02:00 Lee Jones <lee.jones@xxxxxxxxxx>:
> > On Thu, 25 Sep 2014, Johannes Pointner wrote:
> >
> >> Add documentation for compatible property of subnodes.
> >>
> >> Signed-off-by: Johannes Pointner <johannes.pointner@xxxxxxxxxxxxxxxxx>
> >> ---
> >> Documentation/devicetree/bindings/regulator/tps65217.txt | 7 ++++++-
> >> .../devicetree/bindings/video/backlight/tps65217-backlight.txt | 9 ++++++---
> >> 2 files changed, 12 insertions(+), 4 deletions(-)
> >>
> >> diff --git a/Documentation/devicetree/bindings/regulator/tps65217.txt b/Documentation/devicetree/bindings/regulator/tps65217.txt
> >> index 4f05d20..8ae3a3b 100644
> >> --- a/Documentation/devicetree/bindings/regulator/tps65217.txt
> >> +++ b/Documentation/devicetree/bindings/regulator/tps65217.txt
> >> @@ -14,6 +14,9 @@ Required properties:
> >> Optional properties:
> >> - ti,pmic-shutdown-controller: Telling the PMIC to shutdown on PWR_EN toggle.
> >>
> >> +Required subnode properties:
> >> +- compatible: "ti,tps65217-pmic"
> >> +
> >> The valid names for regulators are:
> >> tps65217: dcdc1, dcdc2, dcdc3, ldo1, ldo2, ldo3 and ldo4
> >>
> >> @@ -23,9 +26,11 @@ Example:
> >>
> >> tps: tps@24 {
> >> compatible = "ti,tps65217";
> >> + reg = <0x24>;
> >> ti,pmic-shutdown-controller;
> >>
> >> - regulators {
> >> + tps_pmic: regulators {
> >
> > How is the tps_pmic label used?
> >
> >> + compatible = "ti,tps65217-pmic";
> >
> > I'd like to see a '\n' here.
> I will add a newline here.
> >
> >> dcdc1_reg: dcdc1 {
> >> regulator-min-microvolt = <900000>;
> >> regulator-max-microvolt = <1800000>;
> >> diff --git a/Documentation/devicetree/bindings/video/backlight/tps65217-backlight.txt b/Documentation/devicetree/bindings/video/backlight/tps65217-backlight.txt
> >> index 5fb9279..f92f154 100644
> >> --- a/Documentation/devicetree/bindings/video/backlight/tps65217-backlight.txt
> >> +++ b/Documentation/devicetree/bindings/video/backlight/tps65217-backlight.txt
> >> @@ -6,19 +6,22 @@ used to drive LEDs for use as backlights.
> >> Required properties:
> >> - compatible: "ti,tps65217"
> >> - reg: I2C slave address
> >> -- backlight: node for specifying WLED1 and WLED2 lines in TPS65217
> >> +- backlight: subnode for specifying WLED1 and WLED2 lines in TPS65217
> >> +
> >> +Required subnode properties:
> >> +- compatible: "ti,tps65217-bl"
> >> - isel: selection bit, valid values: 1 for ISEL1 (low-level) and 2 for ISEL2 (high-level)
> >> - fdim: PWM dimming frequency, valid values: 100, 200, 500, 1000
> >> - default-brightness: valid values: 0-100
> >>
> >> -Each regulator is defined using the standard binding for regulators.
> >>
> >> Example:
> >>
> >> tps: tps@24 {
> >> reg = <0x24>;
> >> compatible = "ti,tps65217";
> >
> > I'd like to see a '\n' here.
> I will add a newline here.
> >
> >> - backlight {
> >> + tps_bl: backlight {
> >
> > Same here. Is this label used?
> >
> >> + compatible = "ti,tps65217-bl";
> >> isel = <1>; /* 1 - ISET1, 2 ISET2 */
> >> fdim = <100>; /* TPS65217_BL_FDIM_100HZ */
> >> default-brightness = <50>;
> >
>
> Regarding the labels: The backlight label could be used like the
> following. I use it like this in my tests with the tilcdc panel driver
> which has a backlight support.
>
> panel {
> backlight = <&tps_bl>;
>
> panel-info {
> ac-bias = <255>;
> ac-bias-intrpt = <0>;
> dma-burst-sz = <16>;
> bpp = <32>;
> fdd = <0x80>;
> sync-edge = <0>;
> sync-ctrl = <1>;
> .
> .
> .
>
> I'm not sure if there could be actual use for the pmic label, but I
> thought if I add a label to backlight, I have to add one to the pmic
> too to keep it similar.
No, not at all. If it's not used, you should remove it.
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
--
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
