| Message ID | 1463173373-648-1-git-send-email-Paul.Handrigan@cirrus.com |
|---|---|
| State | Changes Requested, archived |
| Headers | show |
On Fri, May 13, 2016 at 04:02:53PM -0500, Paul.Handrigan@cirrus.com wrote: > From: Paul Handrigan <Paul.Handrigan@cirrus.com> > > Add device tree bindings file for the cs35l33 8V boosted > class D amplifier. > > Signed-off-by: Paul Handrigan <Paul.Handrigan@cirrus.com> > --- > .../devicetree/bindings/sound/cs35l33.txt | 73 ++++++++++++++++++++++ > 1 file changed, 73 insertions(+) > create mode 100644 Documentation/devicetree/bindings/sound/cs35l33.txt > > diff --git a/Documentation/devicetree/bindings/sound/cs35l33.txt b/Documentation/devicetree/bindings/sound/cs35l33.txt > new file mode 100644 > index 0000000..273d73a > --- /dev/null > +++ b/Documentation/devicetree/bindings/sound/cs35l33.txt > @@ -0,0 +1,73 @@ > +CS35L33 Speaker Amplifier > + > +Required properties: > + > + - compatible : "cirrus,cs35l33" > + > + - reg : the I2C address of the device for I2C > + > + - VA-supply, VP-supply : power supplies for the device, > + as covered in > + Documentation/devicetree/bindings/regulator/regulator.txt. > + > +Optional properties: > + > + - reset-gpios : gpio used to reset the amplifier > + > + - interrupt-parent : Specifies the phandle of the interrupt controller to > + which the IRQs from CS35L33 are delivered to. > + - interrupts : IRQ line info CS35L33. > + (See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt > + for further information relating to interrupt properties) > + > + - boost-ctl : Booster voltage use to supply the amp. If the value is > + 0, then VBST = VP. If greater than 0, the boost voltage will be 3.3V with > + a value of 1 and will increase at a step size of 0.1V until a maximum of > + 8.0V. Can you just specify this is microvolts? Looks like an easy conversion. > + > + - ramp-rate : On power up, it affects the time from when the power > + up sequence begins to the time the audio reaches a full-scale output. > + On power down, it affects the time from when the power-down sequence > + begins to when the amplifier disables the PWM outputs. If this property > + is not set then soft ramping will be disabled and ramp time would be > + 20ms. If this property is set to 0,1,2,3 then ramp times would be 40ms, > + 60ms,100ms,175ms respectively for 48KHz sample rate. Either use time units or add vendor prefix. > + - boost-ipk : The maximum current allowed for the boost converter. > + The range starts at 1.85A (0xF0) and goes to a maximum of 3.60A (0xE0) > + with a step size of 0.015625A. The default is 2.50A (0x90). Can this be in microamps? Are these standard/typical properties for Class D amps? > + > + - hg-algo : Parameters for internal Class H/G algorithm that > + controls the amplifier supplies. Each property in this node needs to be defined. > + > +Example: > + > +cs35l33: cs35l33@40 { > + compatible = "cirrus,cs35l33"; > + reg = <0x40>; > + > + VA-supply = <&ldo5_reg>; > + VP-supply = <&ldo5_reg>; > + > + interrupt-parent = <&gpio8>; > + interrupts = <3 IRQ_TYPE_LEVEL_LOW>; > + > + reset-gpios = <&cs47l91 34 0>; > + > + ramp-rate = <0x0>; > + boost-ctl = <0x30>; /* VBST = 8.0V */ > + boost-ipk = <0xE0>; /* 3.60A */ > + > + hg-algo { > + mem-depth = <0x3>; > + release-rate = <0x3>; > + hd-rm = <0xA>; > + ldo-thld = <0x1>; > + ldo-path-disable = <0x0>; > + ldo-entry-delay=<0x4>; > + vp-hg-auto; > + vp-hg=<0xF>; > + vp-hg-rate=<0x2>; > + vp-hg-va=<0x0>; > + }; > +}; -- 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
On Mon, 16 May 2016, Rob Herring wrote: > On Fri, May 13, 2016 at 04:02:53PM -0500, Paul.Handrigan@cirrus.com wrote: > > From: Paul Handrigan <Paul.Handrigan@cirrus.com> > > > > Add device tree bindings file for the cs35l33 8V boosted > > class D amplifier. > > > > Signed-off-by: Paul Handrigan <Paul.Handrigan@cirrus.com> > > --- > > .../devicetree/bindings/sound/cs35l33.txt | 73 ++++++++++++++++++++++ > > 1 file changed, 73 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/sound/cs35l33.txt > > > > diff --git a/Documentation/devicetree/bindings/sound/cs35l33.txt b/Documentation/devicetree/bindings/sound/cs35l33.txt > > new file mode 100644 > > index 0000000..273d73a > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/sound/cs35l33.txt > > @@ -0,0 +1,73 @@ > > +CS35L33 Speaker Amplifier > > + - boost-ctl : Booster voltage use to supply the amp. If the value is > > + 0, then VBST = VP. If greater than 0, the boost voltage will be 3.3V with > > + a value of 1 and will increase at a step size of 0.1V until a maximum of > > + 8.0V. > > Can you just specify this is microvolts? Looks like an easy conversion. Yes, I can change that. > > > + > > + - ramp-rate : On power up, it affects the time from when the power > > + up sequence begins to the time the audio reaches a full-scale output. > > + On power down, it affects the time from when the power-down sequence > > + begins to when the amplifier disables the PWM outputs. If this property > > + is not set then soft ramping will be disabled and ramp time would be > > + 20ms. If this property is set to 0,1,2,3 then ramp times would be 40ms, > > + 60ms,100ms,175ms respectively for 48KHz sample rate. > OK. Thanks! > Either use time units or add vendor prefix. > > > + - boost-ipk : The maximum current allowed for the boost converter. > > + The range starts at 1.85A (0xF0) and goes to a maximum of 3.60A (0xE0) > > + with a step size of 0.015625A. The default is 2.50A (0x90). > > Can this be in microamps? > Yes. > Are these standard/typical properties for Class D amps? Not typical for class D amps in general, but some would be fairly common for boosted class D amps. For example boost current maximum should be fairly common. It is standard for all Cirrus class D boosted amps. > > > + > > + - hg-algo : Parameters for internal Class H/G algorithm that > > + controls the amplifier supplies. > > Each property in this node needs to be defined. OK. Will do. > -- 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
diff --git a/Documentation/devicetree/bindings/sound/cs35l33.txt b/Documentation/devicetree/bindings/sound/cs35l33.txt new file mode 100644 index 0000000..273d73a --- /dev/null +++ b/Documentation/devicetree/bindings/sound/cs35l33.txt @@ -0,0 +1,73 @@ +CS35L33 Speaker Amplifier + +Required properties: + + - compatible : "cirrus,cs35l33" + + - reg : the I2C address of the device for I2C + + - VA-supply, VP-supply : power supplies for the device, + as covered in + Documentation/devicetree/bindings/regulator/regulator.txt. + +Optional properties: + + - reset-gpios : gpio used to reset the amplifier + + - interrupt-parent : Specifies the phandle of the interrupt controller to + which the IRQs from CS35L33 are delivered to. + - interrupts : IRQ line info CS35L33. + (See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt + for further information relating to interrupt properties) + + - boost-ctl : Booster voltage use to supply the amp. If the value is + 0, then VBST = VP. If greater than 0, the boost voltage will be 3.3V with + a value of 1 and will increase at a step size of 0.1V until a maximum of + 8.0V. + + - ramp-rate : On power up, it affects the time from when the power + up sequence begins to the time the audio reaches a full-scale output. + On power down, it affects the time from when the power-down sequence + begins to when the amplifier disables the PWM outputs. If this property + is not set then soft ramping will be disabled and ramp time would be + 20ms. If this property is set to 0,1,2,3 then ramp times would be 40ms, + 60ms,100ms,175ms respectively for 48KHz sample rate. + + - boost-ipk : The maximum current allowed for the boost converter. + The range starts at 1.85A (0xF0) and goes to a maximum of 3.60A (0xE0) + with a step size of 0.015625A. The default is 2.50A (0x90). + + - hg-algo : Parameters for internal Class H/G algorithm that + controls the amplifier supplies. + +Example: + +cs35l33: cs35l33@40 { + compatible = "cirrus,cs35l33"; + reg = <0x40>; + + VA-supply = <&ldo5_reg>; + VP-supply = <&ldo5_reg>; + + interrupt-parent = <&gpio8>; + interrupts = <3 IRQ_TYPE_LEVEL_LOW>; + + reset-gpios = <&cs47l91 34 0>; + + ramp-rate = <0x0>; + boost-ctl = <0x30>; /* VBST = 8.0V */ + boost-ipk = <0xE0>; /* 3.60A */ + + hg-algo { + mem-depth = <0x3>; + release-rate = <0x3>; + hd-rm = <0xA>; + ldo-thld = <0x1>; + ldo-path-disable = <0x0>; + ldo-entry-delay=<0x4>; + vp-hg-auto; + vp-hg=<0xF>; + vp-hg-rate=<0x2>; + vp-hg-va=<0x0>; + }; +};