On Thu, 31 Jul 2014, Mark Brown wrote: > On Tue, Jul 29, 2014 at 03:02:43PM -0500, Brian Austin wrote: > > > This patch adds the devicetree bindings file for the Cirrus Logic CS35L32 Boosted Amplifier > > Word wrapping in the commit message please. > > > + - cirrus,sdout-datacfg : Data configuration for dual CS35L32 applications only. > > + Determines the data packed in a two-CS35L32 configuration. > > + 0 = Left/right channels VMON[11:0], IMON[11:0], VPMON[7:0]. > > + 1 = Left/right channels VMON[11:0], IMON[11:0], STATUS. > > + 2 = (Default) left/right channels VMON[15:0], IMON [15:0]. > > + 3 = Left/right channels VPMON[7:0], STATUS. > > > + - cirrus,sdout-share : SDOUT sharing. Determines whether one or two CS35L32 > > + devices are on board sharing SDOUT. > > + 0 = (Default) One IC. > > + 1 = Two IC's. > > So, this was all a bit non-obvious but I found a datasheet so was able > to figure it out. The device is using the I2S input channels to stream > monitoring data back to the host and can do this in TDM mode. That's a > bit fun, and would ideally mean we'd have to play with hwmon, but it's > possibly better not to worry about that for now. Good. I didn't want to have to mess with anything on this part. At least for now > > Looking at the datasheet I also see a VP supply which is omitted from > the driver and bindings - in battery powered devices like phones it'll > be connected directly to the battery so have no effect but it's still > better to represent it in case someone wants to use it some other way > that does merit software control (eg, a system running off 12V batteries > will need to regulate it down). > I was wondering about that. I didn't think representing a battery as a regulator was gonna be accepted but I can add that back in for sure > > + - cirrus,gain-manager : Audio-gain management when LEDs are active. > > + 0 = (Default) Automatically reduces audio volume once by 3 dB, only if needed > > + to avoid thermal shutdown or current limiting the boost converter. > > + If the condition persists, the CS35L32 examine s ILED_MNG and responds accordingly. > > + Audio recovers to original volume automatically at the end of the LED event. > > + 1 = User controls volume (nonautomatic). > > This looks like something that should be a runtime control. > I thought so too but "They" assure me it is not. Thanks Mark -- 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
