On Wed, Feb 08, 2012 at 11:46:00AM +0530, Shubhrajyoti wrote:
> On Wednesday 08 February 2012 09:56 AM, Ajay Kumar Gupta wrote:
> > +static int dsps_musb_init(struct musb *musb)
> > +{
> > + struct device *dev = musb->controller;
> > + struct musb_hdrc_platform_data *plat = dev->platform_data;
> > + struct platform_device *pdev = to_platform_device(dev->parent);
> > + struct dsps_glue *glue = platform_get_drvdata(pdev);
> > + const struct dsps_musb_wrapper *wrp = glue->wrp;
> > + struct omap_musb_board_data *data = plat->board_data;
> > + void __iomem *reg_base = musb->ctrl_base;
> > + u32 rev, val;
> > + int status;
> > +
> > + /* mentor core register starts at offset of 0x400 from musb base */
> > + musb->mregs += wrp->musb_core_offset;
> > +
> > + /* NOP driver needs change if supporting dual instance */
> > + usb_nop_xceiv_register();
> > + musb->xceiv = otg_get_transceiver();
> > + if (!musb->xceiv)
> > + return -ENODEV;
> > +
> > + status = pm_runtime_get_sync(dev);
> > + if (status < 0) {
> > + dev_err(dev, "pm_runtime_get_sync FAILED");
> > + goto err0;
> > + }
> So you are doing a get_sync at init and you cut the clocks at exit only.
> Any particular reason for that.
that's a very good question. We're just adding a brand new file, which
is clean and stuff... so we might as well start with good PM
capabilities.
--
balbi
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