Re: [PATCH v2 2/2] dt: bindings: tps65217: add compatible property for subnodes

[Lee Jones]

On Wed, 08 Oct 2014, Johannes Pointner wrote:

> 2014-10-08 12:47 GMT+02:00 Lee Jones <lee.jones@xxxxxxxxxx>:
> > 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.
> 
> OK, my mistake, sorry.
> I'll remove the pmic part of the patch and add the newline to the
> backlight documentation and resend the patch, if this is OK for you?

Yes, fine.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org â Open source software for ARM SoCs
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