[PATCH 2/2] arm: mach-imx: anatop: add two APIs for USB driver

[Peter Chen]

On Wed, Aug 14, 2013 at 11:47:56AM +0800, Shawn Guo wrote:
> On Mon, Aug 12, 2013 at 03:26:54PM +0800, Peter Chen wrote:
> > imx_anatop_usb1_disconnect_line is used to disconnect dp/dm between
> > PHY and controller, after that, the controller always gets SE0
> > for the status of dp/dm, it is not any wakeup signal for controller.
> > It is used to avoid unknown interrupt due to dp/dm is floading
> > after the USB PHY is no powered when there is no vbus supplied.
> > 
> > imx_anatop_set_stop_mode_config is used to keep internal regualtor on
> > when the system enters suspend mode, it will increase power consumption,
> > we only enable it when the user enables USB wakeup (default is off).
> > 
> > Signed-off-by: Peter Chen <peter.chen at freescale.com>
> > ---
> >  arch/arm/mach-imx/anatop.c |   22 ++++++++++++++++++++++
> >  arch/arm/mach-imx/common.h |    2 ++
> >  2 files changed, 24 insertions(+), 0 deletions(-)
> > 
> > diff --git a/arch/arm/mach-imx/anatop.c b/arch/arm/mach-imx/anatop.c
> > index 71f1a08..7f96bbc 100644
> > --- a/arch/arm/mach-imx/anatop.c
> > +++ b/arch/arm/mach-imx/anatop.c
> > @@ -26,6 +26,7 @@
> >  #define ANADIG_ANA_MISC0	0x150
> >  #define ANADIG_ANA_MISC2	0x170
> >  #define ANADIG_USB1_CHRG_DETECT	0x1b0
> > +#define ANADIG_USB1_LOOPBACK	0x1e0
> >  #define ANADIG_USB2_CHRG_DETECT	0x210
> >  #define ANADIG_DIGPROG		0x260
> >  
> > @@ -34,6 +35,8 @@
> >  #define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG	0x1000
> >  #define BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B	0x80000
> >  #define BM_ANADIG_USB_CHRG_DETECT_EN_B		0x100000
> > +#define BM_ANADIG_USB1_LOOPBACK_UTMI_DIG_TST1	0x00000004
> > +#define BM_ANADIG_USB1_LOOPBACK_TSTI_TX_EN	0x00000020
> >  
> >  #define ANADIG_ANA_MISC2_REG1_STEP_OFFSET	26
> >  #define ANADIG_ANA_MISC2_REG_STEP_MASK		0x3
> > @@ -142,6 +145,25 @@ u32 imx_anatop_get_digprog(void)
> >  	return digprog;
> >  }
> >  
> > +void imx_anatop_usb1_disconnect_line(bool enable)
> > +{
> > +	if (enable)
> > +		regmap_write(anatop, ANADIG_USB1_LOOPBACK,
> > +			BM_ANADIG_USB1_LOOPBACK_UTMI_DIG_TST1 |
> > +				BM_ANADIG_USB1_LOOPBACK_TSTI_TX_EN);
> > +	else
> > +		regmap_write(anatop, ANADIG_USB1_LOOPBACK, 0);
> > +}
> > +EXPORT_SYMBOL(imx_anatop_usb1_disconnect_line);
> > +
> > +void imx_anatop_set_stop_mode_config(bool enable)
> > +{
> > +	regmap_write(anatop, ANADIG_ANA_MISC0 +
> > +		(enable ? REG_SET : REG_CLR),
> > +			BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG);
> > +}
> > +EXPORT_SYMBOL(imx_anatop_set_stop_mode_config);
> > +
> 
> Where do you want to call these two functions from?
> 

>From USB driver, the usb driver is possible built as module.

-- 

Best Regards,
Peter Chen