| Message ID | 1478523908-4383-3-git-send-email-abailon@baylibre.com |
|---|---|
| State | New |
| Headers | show |
On Monday 07 November 2016 06:35 PM, Alexandre Bailon wrote: > If we configure the da8xx OTG phy in OTG mode, neither device or host > mode will work. That is because the PHY is not able to detect and notify > the driver that value of ID pin changed. > To work despite this hardware limitation, the da8xx glue implement a > workaround. > But to work, the workaround require the VBUS sense and the session end > comparator to enabled. > Enable them if the phy is configured in OTG mode. > > Signed-off-by: Alexandre Bailon <abailon@baylibre.com> merged this to phy -next. Thanks Kishon > --- > drivers/phy/phy-da8xx-usb.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/phy/phy-da8xx-usb.c b/drivers/phy/phy-da8xx-usb.c > index 32ae78c..089c13b 100644 > --- a/drivers/phy/phy-da8xx-usb.c > +++ b/drivers/phy/phy-da8xx-usb.c > @@ -23,6 +23,8 @@ > #include <linux/platform_device.h> > #include <linux/regmap.h> > > +#define PHY_INIT_BITS (CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN) > + > struct da8xx_usb_phy { > struct phy_provider *phy_provider; > struct phy *usb11_phy; > @@ -207,6 +209,9 @@ static int da8xx_usb_phy_probe(struct platform_device *pdev) > dev_warn(dev, "Failed to create usb20 phy lookup\n"); > } > > + regmap_write_bits(d_phy->regmap, CFGCHIP(2), > + PHY_INIT_BITS, PHY_INIT_BITS); > + > return 0; > } > > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/phy/phy-da8xx-usb.c b/drivers/phy/phy-da8xx-usb.c index 32ae78c..089c13b 100644 --- a/drivers/phy/phy-da8xx-usb.c +++ b/drivers/phy/phy-da8xx-usb.c @@ -23,6 +23,8 @@ #include <linux/platform_device.h> #include <linux/regmap.h> +#define PHY_INIT_BITS (CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN) + struct da8xx_usb_phy { struct phy_provider *phy_provider; struct phy *usb11_phy; @@ -207,6 +209,9 @@ static int da8xx_usb_phy_probe(struct platform_device *pdev) dev_warn(dev, "Failed to create usb20 phy lookup\n"); } + regmap_write_bits(d_phy->regmap, CFGCHIP(2), + PHY_INIT_BITS, PHY_INIT_BITS); + return 0; }
If we configure the da8xx OTG phy in OTG mode, neither device or host mode will work. That is because the PHY is not able to detect and notify the driver that value of ID pin changed. To work despite this hardware limitation, the da8xx glue implement a workaround. But to work, the workaround require the VBUS sense and the session end comparator to enabled. Enable them if the phy is configured in OTG mode. Signed-off-by: Alexandre Bailon <abailon@baylibre.com> --- drivers/phy/phy-da8xx-usb.c | 5 +++++ 1 file changed, 5 insertions(+) -- 2.7.3 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html