On Wed, Aug 24, 2016 at 05:34:55PM +0530, Vinay Simha wrote: > thierry, > > this is the reference pinouts of the panel > http://www.tonylabs.com/wp-content/uploads/LT070ME05000-pinouts.jpg I can't open that file. > as you suggest , i will change the vcc-supply, > > - iovcc-supply: phandle of the regulator that supplies power to > the IOVCC voltage input (1.8 V) > > will keep the other two(vddp-supply, dcdc_en-supply) remaining same. "dcdc_en" sounds to me like it should be a GPIO rather than a regulator. According to this datasheet: http://kb.52solution.com/data/uploads/2016/04/07/3172846545705cc22d050e.pdf the input voltages are indeed VDD, VDDp and IOVCC, though with slightly larger tolerances than the previous datasheet. VDD and VDDp can both go from 3.0 V to 5.0 V. DCDC_EN is indeed an additional GPIO to enable the VDDp supply. I think you'd need something along these lines: - vdd-supply: LED power supply (3.0-5.0 V) - vddp-supply: power IC supply (3.0-5.0 V) - iovcc-supply: LCM power supply (1.8 V) - dcdc-en-gpios: power IC supply enable - led-en-gpios: LED backlight enable Or perhaps your vddp-supply should be a regulator that's controlled by the GPIO that you'd put in dcdc-en-gpios. That might work better. That would leave only led-en-gpios as the only enable GPIOs property, so it would be okay to keep the name "enable-gpios", I guess. Thierry > On Wed, Aug 24, 2016 at 5:15 PM, Thierry Reding > <thierry.reding@xxxxxxxxx> wrote: > > On Sun, Jul 31, 2016 at 08:45:21PM +0530, Vinay Simha BN wrote: > >> Add documentation for lt070me05000 panel > >> > >> Cc: Archit Taneja <archit.taneja@xxxxxxxxx> > >> Cc: John Stultz <john.stultz@xxxxxxxxxx> > >> Cc: Thierry Reding <thierry.reding@xxxxxxxxx> > >> Cc: Sumit Semwal <sumit.semwal@xxxxxxxxxx> > >> Signed-off-by: Vinay Simha BN <simhavcs@xxxxxxxxx> > >> Acked-by: Rob Herring <robh@xxxxxxxxxx> > >> > >> --- > >> v2: > >> * incorporated rob herring and thierry reviews > >> gpio to gpios, gpio to regulator using fixed regulators > >> and pwm backlight is removed, since it is controlled by > >> dcs commands > >> --- > >> .../bindings/display/panel/jdi,lt070me05000.txt | 57 ++++++++++++++++++++++ > >> 1 file changed, 57 insertions(+) > >> create mode 100644 Documentation/devicetree/bindings/display/panel/jdi,lt070me05000.txt > >> > >> diff --git a/Documentation/devicetree/bindings/display/panel/jdi,lt070me05000.txt b/Documentation/devicetree/bindings/display/panel/jdi,lt070me05000.txt > >> new file mode 100644 > >> index 0000000..613b76f > >> --- /dev/null > >> +++ b/Documentation/devicetree/bindings/display/panel/jdi,lt070me05000.txt > >> @@ -0,0 +1,57 @@ > >> +JDI model LT070ME05000 1200x1920 7" DSI Panel > >> + > >> +Required properties: > >> +- compatible: should be "jdi,lt070me05000" > >> +- vddp-supply: phandle of the regulator that provides the supply voltage > >> + Power IC supply (3-5V) > >> +- dcdc_en-supply: phandle of the regulator that provides the supply voltage > >> + Power IC supply enable, High active > >> +- vcc-supply: phandle of the regulator that provides the supply voltage > >> + IOVCC , power supply for LCM (1.8V) > > > > I was just going to apply this and wanted to add some information about > > how many lanes the panel uses, so I looked at the datasheet linked to in > > patch 4/4: > > > > http://panelone.net/en/7-0-inch/JDI_LT070ME05000_7.0_inch-datasheet > > > > and noticed that the power supplies in the binding here don't match the > > ones listed in the datasheet. Granted, the datasheet is somewhat meager, > > but it lists the following three input voltages: > > > > - IOVCC at 1.8 V > > - VDD at 3.0 V > > - VDDP at 3.0 V > > > > This matches in part what the above binding describes, but it's not > > quite right, so I'm wondering if the name for dcdc_en-supply came from > > the board schematics and reflects the name of the rail on the board > > design that provides this rather than the input voltage on the panel. > > > > I think we should follow the names in the panel datasheet so that people > > can more easily reference the correct regulators when using this panel > > on a different board. I'd suggest: > > > > - iovcc-supply: phandle of the regulator that supplies power to > > the IOVCC voltage input (1.8 V) > > - vdd-supply: phandle of the regulator that supplies power to > > the VDD voltage input (3.0 V) > > - vddp-supply: phandle of the regulator that supplies power to > > the VDDP voltage input (3.0 V) > > > > Any objections? > > > > Thierry > > > > -- > regards, > vinaysimha
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