RE: [PATCH v3 5/9] usb: gadget: s3c-hsotg: use generic phy_init()/phy_exit() support
Hi Matt, > From: Matt Porter [mailto:matt.por...@linaro.org] > Sent: Thursday, November 28, 2013 5:42 PM > > On Thu, Nov 28, 2013 at 11:23:52AM +0530, Kishon Vijay Abraham I wrote: > > On Thursday 28 November 2013 04:06 AM, Matt Porter wrote: > > > On Wed, Nov 27, 2013 at 12:13:25PM -0500, Matt Porter wrote: > > >> On Tue, Nov 26, 2013 at 03:53:32PM +0530, Kishon Vijay Abraham I > wrote: > > >>> Hi, > > >>> > > >>> On Monday 25 November 2013 11:46 PM, Matt Porter wrote: > > If a generic phy is present, call phy_init()/phy_exit(). This > > supports generic phys that must be soft reset before power on. > > > > Signed-off-by: Matt Porter > > --- > > drivers/usb/gadget/s3c-hsotg.c | 5 + > > 1 file changed, 5 insertions(+) > > > > diff --git a/drivers/usb/gadget/s3c-hsotg.c > > b/drivers/usb/gadget/s3c-hsotg.c index da3879b..8dfe33f 100644 > > --- a/drivers/usb/gadget/s3c-hsotg.c > > +++ b/drivers/usb/gadget/s3c-hsotg.c > > @@ -3622,6 +3622,9 @@ static int s3c_hsotg_probe(struct > platform_device *pdev) > > goto err_supplies; > > } > > > > + if (hsotg->phy) > > >>> > > >>> IS_ERR? If your phy_get fails *phy* will have a error value.. > > >> > > >> Yes, thanks. I'll fix these and also note that the same issue > > >> exists in Kamil's patch for these same hsotg->phy conditional uses. > > >> I'll work with Kamil to either get those addressed there or in a > follow on fix. > > > > > > I spoke too soon. If devm_phy_get fails, we don't set hsotg->phy > and > > > probe defer thus not reaching this point. Since hsotg->phy is > either > > > NULL or a valid struct phy *, this is correct as is throughout the > driver. > > > > > >>> > > + phy_init(hsotg->phy); > > + > > /* usb phy enable */ > > s3c_hsotg_phy_enable(hsotg); > > > > @@ -3715,6 +3718,8 @@ static int s3c_hsotg_remove(struct > platform_device *pdev) > > } > > > > s3c_hsotg_phy_disable(hsotg); > > + if (hsotg->phy) > > >>> > > >>> same here. > > >> > > >> Ok. > > > > > > Same above, this will be NULL on failure (but is only applicable at > > > this point on the platform data path. > > > > Ah ok.. Btw where is phy_get being called? Is it not part of this > series? > > It's in the Kamil's Exynos USB Phy -> generic phy series [1] which I > depend on here. I mentioned it in the cover letter toward the end so > it's a bit buried. > > I have some outstanding, but trivial, comments on that series but I > hear Kamil will be posting an update in the coming days. I'll wait a > few days to post v4 addressing your comments so I can hopefully rebase > against his updated s3c-hsotg patch. > I am sorry to keep you waiting. I was doing some urgent non USB work lately and that is the reason for the delay. Thank you for the review of the last version, by the way. I should post the new version on Wednesday (or Tuesday afternoon, time permitting). Also, I will have no access to my Samsung email until Tuesday. Best wishes, Kamil Debski -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH v3 5/9] usb: gadget: s3c-hsotg: use generic phy_init()/phy_exit() support
On Thu, Nov 28, 2013 at 11:23:52AM +0530, Kishon Vijay Abraham I wrote: > On Thursday 28 November 2013 04:06 AM, Matt Porter wrote: > > On Wed, Nov 27, 2013 at 12:13:25PM -0500, Matt Porter wrote: > >> On Tue, Nov 26, 2013 at 03:53:32PM +0530, Kishon Vijay Abraham I wrote: > >>> Hi, > >>> > >>> On Monday 25 November 2013 11:46 PM, Matt Porter wrote: > If a generic phy is present, call phy_init()/phy_exit(). This supports > generic phys that must be soft reset before power on. > > Signed-off-by: Matt Porter > --- > drivers/usb/gadget/s3c-hsotg.c | 5 + > 1 file changed, 5 insertions(+) > > diff --git a/drivers/usb/gadget/s3c-hsotg.c > b/drivers/usb/gadget/s3c-hsotg.c > index da3879b..8dfe33f 100644 > --- a/drivers/usb/gadget/s3c-hsotg.c > +++ b/drivers/usb/gadget/s3c-hsotg.c > @@ -3622,6 +3622,9 @@ static int s3c_hsotg_probe(struct platform_device > *pdev) > goto err_supplies; > } > > +if (hsotg->phy) > >>> > >>> IS_ERR? If your phy_get fails *phy* will have a error value.. > >> > >> Yes, thanks. I'll fix these and also note that the same issue exists in > >> Kamil's patch for these same hsotg->phy conditional uses. I'll work with > >> Kamil to either get those addressed there or in a follow on fix. > > > > I spoke too soon. If devm_phy_get fails, we don't set hsotg->phy and probe > > defer thus not reaching this point. Since hsotg->phy is either NULL or a > > valid struct phy *, this is correct as is throughout the driver. > > > >>> > +phy_init(hsotg->phy); > + > /* usb phy enable */ > s3c_hsotg_phy_enable(hsotg); > > @@ -3715,6 +3718,8 @@ static int s3c_hsotg_remove(struct platform_device > *pdev) > } > > s3c_hsotg_phy_disable(hsotg); > +if (hsotg->phy) > >>> > >>> same here. > >> > >> Ok. > > > > Same above, this will be NULL on failure (but is only applicable at this > > point on the platform data path. > > Ah ok.. Btw where is phy_get being called? Is it not part of this series? It's in the Kamil's Exynos USB Phy -> generic phy series [1] which I depend on here. I mentioned it in the cover letter toward the end so it's a bit buried. I have some outstanding, but trivial, comments on that series but I hear Kamil will be posting an update in the coming days. I'll wait a few days to post v4 addressing your comments so I can hopefully rebase against his updated s3c-hsotg patch. -Matt [1] https://lkml.org/lkml/2013/11/5/275 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH v3 5/9] usb: gadget: s3c-hsotg: use generic phy_init()/phy_exit() support
On Thursday 28 November 2013 04:06 AM, Matt Porter wrote: > On Wed, Nov 27, 2013 at 12:13:25PM -0500, Matt Porter wrote: >> On Tue, Nov 26, 2013 at 03:53:32PM +0530, Kishon Vijay Abraham I wrote: >>> Hi, >>> >>> On Monday 25 November 2013 11:46 PM, Matt Porter wrote: If a generic phy is present, call phy_init()/phy_exit(). This supports generic phys that must be soft reset before power on. Signed-off-by: Matt Porter --- drivers/usb/gadget/s3c-hsotg.c | 5 + 1 file changed, 5 insertions(+) diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c index da3879b..8dfe33f 100644 --- a/drivers/usb/gadget/s3c-hsotg.c +++ b/drivers/usb/gadget/s3c-hsotg.c @@ -3622,6 +3622,9 @@ static int s3c_hsotg_probe(struct platform_device *pdev) goto err_supplies; } + if (hsotg->phy) >>> >>> IS_ERR? If your phy_get fails *phy* will have a error value.. >> >> Yes, thanks. I'll fix these and also note that the same issue exists in >> Kamil's patch for these same hsotg->phy conditional uses. I'll work with >> Kamil to either get those addressed there or in a follow on fix. > > I spoke too soon. If devm_phy_get fails, we don't set hsotg->phy and probe > defer thus not reaching this point. Since hsotg->phy is either NULL or a > valid struct phy *, this is correct as is throughout the driver. > >>> + phy_init(hsotg->phy); + /* usb phy enable */ s3c_hsotg_phy_enable(hsotg); @@ -3715,6 +3718,8 @@ static int s3c_hsotg_remove(struct platform_device *pdev) } s3c_hsotg_phy_disable(hsotg); + if (hsotg->phy) >>> >>> same here. >> >> Ok. > > Same above, this will be NULL on failure (but is only applicable at this > point on the platform data path. Ah ok.. Btw where is phy_get being called? Is it not part of this series? Thanks Kishon > > -Matt > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH v3 5/9] usb: gadget: s3c-hsotg: use generic phy_init()/phy_exit() support
On Wed, Nov 27, 2013 at 12:13:25PM -0500, Matt Porter wrote: > On Tue, Nov 26, 2013 at 03:53:32PM +0530, Kishon Vijay Abraham I wrote: > > Hi, > > > > On Monday 25 November 2013 11:46 PM, Matt Porter wrote: > > > If a generic phy is present, call phy_init()/phy_exit(). This supports > > > generic phys that must be soft reset before power on. > > > > > > Signed-off-by: Matt Porter > > > --- > > > drivers/usb/gadget/s3c-hsotg.c | 5 + > > > 1 file changed, 5 insertions(+) > > > > > > diff --git a/drivers/usb/gadget/s3c-hsotg.c > > > b/drivers/usb/gadget/s3c-hsotg.c > > > index da3879b..8dfe33f 100644 > > > --- a/drivers/usb/gadget/s3c-hsotg.c > > > +++ b/drivers/usb/gadget/s3c-hsotg.c > > > @@ -3622,6 +3622,9 @@ static int s3c_hsotg_probe(struct platform_device > > > *pdev) > > > goto err_supplies; > > > } > > > > > > + if (hsotg->phy) > > > > IS_ERR? If your phy_get fails *phy* will have a error value.. > > Yes, thanks. I'll fix these and also note that the same issue exists in > Kamil's patch for these same hsotg->phy conditional uses. I'll work with > Kamil to either get those addressed there or in a follow on fix. I spoke too soon. If devm_phy_get fails, we don't set hsotg->phy and probe defer thus not reaching this point. Since hsotg->phy is either NULL or a valid struct phy *, this is correct as is throughout the driver. > > > > > + phy_init(hsotg->phy); > > > + > > > /* usb phy enable */ > > > s3c_hsotg_phy_enable(hsotg); > > > > > > @@ -3715,6 +3718,8 @@ static int s3c_hsotg_remove(struct platform_device > > > *pdev) > > > } > > > > > > s3c_hsotg_phy_disable(hsotg); > > > + if (hsotg->phy) > > > > same here. > > Ok. Same above, this will be NULL on failure (but is only applicable at this point on the platform data path. -Matt -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH v3 5/9] usb: gadget: s3c-hsotg: use generic phy_init()/phy_exit() support
On Tue, Nov 26, 2013 at 03:53:32PM +0530, Kishon Vijay Abraham I wrote: > Hi, > > On Monday 25 November 2013 11:46 PM, Matt Porter wrote: > > If a generic phy is present, call phy_init()/phy_exit(). This supports > > generic phys that must be soft reset before power on. > > > > Signed-off-by: Matt Porter > > --- > > drivers/usb/gadget/s3c-hsotg.c | 5 + > > 1 file changed, 5 insertions(+) > > > > diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c > > index da3879b..8dfe33f 100644 > > --- a/drivers/usb/gadget/s3c-hsotg.c > > +++ b/drivers/usb/gadget/s3c-hsotg.c > > @@ -3622,6 +3622,9 @@ static int s3c_hsotg_probe(struct platform_device > > *pdev) > > goto err_supplies; > > } > > > > + if (hsotg->phy) > > IS_ERR? If your phy_get fails *phy* will have a error value.. Yes, thanks. I'll fix these and also note that the same issue exists in Kamil's patch for these same hsotg->phy conditional uses. I'll work with Kamil to either get those addressed there or in a follow on fix. > > > + phy_init(hsotg->phy); > > + > > /* usb phy enable */ > > s3c_hsotg_phy_enable(hsotg); > > > > @@ -3715,6 +3718,8 @@ static int s3c_hsotg_remove(struct platform_device > > *pdev) > > } > > > > s3c_hsotg_phy_disable(hsotg); > > + if (hsotg->phy) > > same here. Ok. > > Thanks > Kishon -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH v3 5/9] usb: gadget: s3c-hsotg: use generic phy_init()/phy_exit() support
Hi, On Monday 25 November 2013 11:46 PM, Matt Porter wrote: > If a generic phy is present, call phy_init()/phy_exit(). This supports > generic phys that must be soft reset before power on. > > Signed-off-by: Matt Porter > --- > drivers/usb/gadget/s3c-hsotg.c | 5 + > 1 file changed, 5 insertions(+) > > diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c > index da3879b..8dfe33f 100644 > --- a/drivers/usb/gadget/s3c-hsotg.c > +++ b/drivers/usb/gadget/s3c-hsotg.c > @@ -3622,6 +3622,9 @@ static int s3c_hsotg_probe(struct platform_device *pdev) > goto err_supplies; > } > > + if (hsotg->phy) IS_ERR? If your phy_get fails *phy* will have a error value.. > + phy_init(hsotg->phy); > + > /* usb phy enable */ > s3c_hsotg_phy_enable(hsotg); > > @@ -3715,6 +3718,8 @@ static int s3c_hsotg_remove(struct platform_device > *pdev) > } > > s3c_hsotg_phy_disable(hsotg); > + if (hsotg->phy) same here. Thanks Kishon -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH v3 5/9] usb: gadget: s3c-hsotg: use generic phy_init()/phy_exit() support
If a generic phy is present, call phy_init()/phy_exit(). This supports generic phys that must be soft reset before power on. Signed-off-by: Matt Porter --- drivers/usb/gadget/s3c-hsotg.c | 5 + 1 file changed, 5 insertions(+) diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c index da3879b..8dfe33f 100644 --- a/drivers/usb/gadget/s3c-hsotg.c +++ b/drivers/usb/gadget/s3c-hsotg.c @@ -3622,6 +3622,9 @@ static int s3c_hsotg_probe(struct platform_device *pdev) goto err_supplies; } + if (hsotg->phy) + phy_init(hsotg->phy); + /* usb phy enable */ s3c_hsotg_phy_enable(hsotg); @@ -3715,6 +3718,8 @@ static int s3c_hsotg_remove(struct platform_device *pdev) } s3c_hsotg_phy_disable(hsotg); + if (hsotg->phy) + phy_exit(hsotg->phy); clk_disable_unprepare(hsotg->clk); return 0; -- 1.8.4 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
