[PATCH] ASoC: fsl_sai: Add isr to deal with error flag
Nicolin Chen
Guangyu.Chen at freescale.com
Thu Mar 27 13:36:18 EST 2014
On Thu, Mar 27, 2014 at 10:13:48AM +0800, Xiubo Li-B47053 wrote:
> > + regmap_read(sai->regmap, FSL_SAI_TCSR, &xcsr);
> > + regmap_write(sai->regmap, FSL_SAI_TCSR, xcsr);
> > +
> > + if (xcsr & FSL_SAI_CSR_WSF)
> > + dev_dbg(dev, "isr: Start of Tx word detected\n");
> > +
> > + if (xcsr & FSL_SAI_CSR_SEF)
> > + dev_dbg(dev, "isr: Tx Frame sync error detected\n");
> > +
> > + if (xcsr & FSL_SAI_CSR_FEF)
> > + dev_dbg(dev, "isr: Transmit underrun detected\n");
> > +
>
> Actually, the above three isrs should to write a logic 1 to this field
> to clear this flag.
>
>
> > + if (xcsr & FSL_SAI_CSR_FWF)
> > + dev_dbg(dev, "isr: Enabled transmit FIFO is empty\n");
> > +
> > + if (xcsr & FSL_SAI_CSR_FRF)
> > + dev_dbg(dev, "isr: Transmit FIFO watermark has been reached\n");
> > +
>
> While are these ones really needed to clear manually ?
The reference manual doesn't mention about the requirement. So SAI should do
the self-clearance.
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