| Message ID | 1471893084-4551-1-git-send-email-olimpiu@arcticsand.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, Aug 22, 2016 at 03:11:24PM -0400, Olimpiu Dejeu wrote: > This is the device tree bindings documentation file > > Signed-off-by: Olimpiu Dejeu <olimpiu@arcticsand.com> > > --- > .../bindings/video/backlight/arcxcnn.txt | 29 ++++++++++++++++++++++ Check your directory location. Things have moved. > 1 file changed, 29 insertions(+) > create mode 100644 Documentation/devicetree/bindings/video/backlight/arcxcnn.txt > > diff --git a/Documentation/devicetree/bindings/video/backlight/arcxcnn.txt b/Documentation/devicetree/bindings/video/backlight/arcxcnn.txt > new file mode 100644 > index 0000000..9cd7315 > --- /dev/null > +++ b/Documentation/devicetree/bindings/video/backlight/arcxcnn.txt > @@ -0,0 +1,29 @@ > +arcxcnn bindings > + > +Required properties: > + - compatible: "arc,arcxcnn", "arc,arc2c0608" One per line please. Is arcxcnn a specific chip? If not drop it. No wildcards in compatible strings. > + - reg: I2C slave address (u8) > + > +Optional properties: > + - bl-name: Backlight device name (string) Use the common bindings. label? > + - init-brt: Initial value of backlight brightness (u32) low 16 bits used Use common bindings. > + - pwm-period: PWM period value. Set only PWM input mode used (u32) > + - prg-addr: Register address of ROM area to be updated (u32) low 8 bits used > + - prg-val: Register value to be updated (u32) low 8 bits used What is this for? This should be a specific property or properties to do explicit things, not a generic fill registers/rom with magic values. > + > +Example: > + > + /* ARC2C0608 */ > + backlight@30 { > + compatible = "arc,arc2c0608"; > + reg = <0x30>; > + > + init-brt = <123>; > + > + /* LED0+1 string enabled */ > + prg_06h { > + prg-addr = <0x06>; > + prg-val = <0x83>; > + }; > + > + }; > -- > 1.9.1 > > -- > To unsubscribe from this list: send the line "unsubscribe devicetree" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Fri, 09 Sep 2016, Olimpiu Dejeu wrote: > On Tue, Aug 23, 2016 at 2:20 PM, Rob Herring <robh@kernel.org> wrote: > > > On Mon, Aug 22, 2016 at 03:11:24PM -0400, Olimpiu Dejeu wrote: > > > This is the device tree bindings documentation file > > > > > > Signed-off-by: Olimpiu Dejeu <olimpiu@arcticsand.com> > > > > > > --- > > > .../bindings/video/backlight/arcxcnn.txt | 29 > > ++++++++++++++++++++++ > > > > > Check your directory location. Things have moved. > > > > Not sure what you mean. This seems to be the right place. Please advise. What kernel version are you on? Documentation/devicetree/bindings/leds/backlight > > > 1 file changed, 29 insertions(+) > > > create mode 100644 Documentation/devicetree/bindings/video/backlight/ > > arcxcnn.txt > > > > > > diff --git a/Documentation/devicetree/bindings/video/backlight/arcxcnn.txt > > b/Documentation/devicetree/bindings/video/backlight/arcxcnn.txt > > > new file mode 100644 > > > index 0000000..9cd7315 > > > --- /dev/null > > > +++ b/Documentation/devicetree/bindings/video/backlight/arcxcnn.txt > > > @@ -0,0 +1,29 @@ > > > +arcxcnn bindings > > > + > > > +Required properties: > > > + - compatible: "arc,arcxcnn", "arc,arc2c0608" > > > > One per line please. > > > > Is arcxcnn a specific chip? If not drop it. No wildcards in compatible > > strings. > > > > Wild-cards can be dropped but there could be a large family of similar > chips that would be supported with this one driver. How would one add > support for a range of chips, some of which don't exist yet? If they do not exist, then do not mention them in this document. Every other chip needs to be named individually. [...] > > > + - pwm-period: PWM period value. Set only PWM input mode used (u32) > > > + - prg-addr: Register address of ROM area to be updated (u32) low 8 > > bits used > > > + - prg-val: Register value to be updated (u32) low 8 bits used > > > > What is this for? This should be a specific property or properties to do > > explicit things, not a generic fill registers/rom with magic values. > > > > We need to expose some registers for test without exposing underlying > functionality. Do you suggest not documenting this in the bindings yet > keeping the code in the driver? We followed the pattern from the lp855x_bl > driver. If you are supplying addresses, use the reg property. > > > + > > > +Example: > > > + > > > + /* ARC2C0608 */ > > > + backlight@30 { > > > + compatible = "arc,arc2c0608"; > > > + reg = <0x30>; > > > + > > > + init-brt = <123>; > > > + > > > + /* LED0+1 string enabled */ > > > + prg_06h { > > > + prg-addr = <0x06>; > > > + prg-val = <0x83>; > > > + }; > > > + > > > + }; > > > > >
diff --git a/Documentation/devicetree/bindings/video/backlight/arcxcnn.txt b/Documentation/devicetree/bindings/video/backlight/arcxcnn.txt new file mode 100644 index 0000000..9cd7315 --- /dev/null +++ b/Documentation/devicetree/bindings/video/backlight/arcxcnn.txt @@ -0,0 +1,29 @@ +arcxcnn bindings + +Required properties: + - compatible: "arc,arcxcnn", "arc,arc2c0608" + - reg: I2C slave address (u8) + +Optional properties: + - bl-name: Backlight device name (string) + - init-brt: Initial value of backlight brightness (u32) low 16 bits used + - pwm-period: PWM period value. Set only PWM input mode used (u32) + - prg-addr: Register address of ROM area to be updated (u32) low 8 bits used + - prg-val: Register value to be updated (u32) low 8 bits used + +Example: + + /* ARC2C0608 */ + backlight@30 { + compatible = "arc,arc2c0608"; + reg = <0x30>; + + init-brt = <123>; + + /* LED0+1 string enabled */ + prg_06h { + prg-addr = <0x06>; + prg-val = <0x83>; + }; + + };
This is the device tree bindings documentation file Signed-off-by: Olimpiu Dejeu <olimpiu@arcticsand.com> --- .../bindings/video/backlight/arcxcnn.txt | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 Documentation/devicetree/bindings/video/backlight/arcxcnn.txt