On Sun, Dec 7, 2014 at 4:01 AM, Max Filippov <jcmvbkbc@xxxxxxxxx> wrote: > XTFPGA boards provides an audio subsystem that consists of TI CDCE706 > clock synthesizer, I2S transmitter and TLV320AIC23 audio codec. > > I2S transmitter has MMIO-based interface that resembles that of the > OpenCores I2S transmitter. I2S transmitter is always a master on I2S > bus. There's no specialized audio DMA, sample data are transferred to > I2S transmitter FIFO by CPU through memory-mapped queue interface. Ping? > Signed-off-by: Max Filippov <jcmvbkbc@xxxxxxxxx> > --- > Changes v2->v3: > - drop .owner = THIS_MODULE from the struct platform_driver initialization; > - rebase to 3.18-rc7. > > Changes v1->v2: > - fix module name in the sound/soc/xtensa/Makefile; > - split PCM data transfer code and I2S interface setup code; > - move clock enabling/disabling to runtime PM code; > - document I2S interface RATIO field; > - rewrite I2S interface LEVEL field calculation to avoid overflows; > - drop select statements from Kconfig; > - document RCU usage for tx_substream; > - clean up code running in RCU read-side critical section; > - use threaded IRQ handler instead of IRQ + tasklet; > - remove empty PCM callback handlers; > - add const to static structures where applicable; > - use platform_set_drvdata instead of dev_set_drvdata; > - drop redundant error reporting code; > - use platform_get_irq instead of platform_get_resource; > - clean up xtfpga_i2s_remove; > - add comments. > > .../devicetree/bindings/sound/cdns,xtfpga-i2s.txt | 18 + > MAINTAINERS | 1 + > sound/soc/Kconfig | 1 + > sound/soc/Makefile | 1 + > sound/soc/xtensa/Kconfig | 7 + > sound/soc/xtensa/Makefile | 3 + > sound/soc/xtensa/xtfpga-i2s.c | 675 +++++++++++++++++++++ > 7 files changed, 706 insertions(+) > create mode 100644 Documentation/devicetree/bindings/sound/cdns,xtfpga-i2s.txt > create mode 100644 sound/soc/xtensa/Kconfig > create mode 100644 sound/soc/xtensa/Makefile > create mode 100644 sound/soc/xtensa/xtfpga-i2s.c -- Thanks. -- Max -- 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
