From: Bin Liu <b-liu-l0cyMroinI0@public.gmane.org> To: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> Cc: Greg Kroah-Hartman <gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>, Kishon Vijay Abraham I <kishon-l0cyMroinI0@public.gmane.org>, Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>, Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>, linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree <devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org> Subject: Re: [PATCH v3 1/4] USB: Fix of_usb_get_dr_mode_by_phy with a shared phy block Date: Thu, 9 Jun 2016 14:49:36 -0500 [thread overview] Message-ID: <20160609194936.GB2167@uda0271908> (raw) In-Reply-To: <9a05c16a-e8a2-02b7-c093-1131e27bcdd4-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> Hi, On Thu, Jun 09, 2016 at 04:51:45PM +0200, Hans de Goede wrote: > Hi, > > On 09-06-16 16:30, Bin Liu wrote: > >Hi, > > > >On Sun, Jun 05, 2016 at 04:59:33PM +0200, Hans de Goede wrote: > >>Some SoCs have a single phy-hw-block with multiple phys, this is > >>modelled by a single phy dts node, so we end up with multiple > >>controller nodes with a phys property pointing to the phy-node > >>of the otg-phy. > >> > >>Only one of these controllers typically is an otg controller, yet we > >>were checking the first controller who uses a phy from the block and > >>then end up looking for a dr_mode property in e.g. the ehci controller. > >> > >>This commit fixes this by adding an arg0 parameter to > >>of_usb_get_dr_mode_by_phy and make of_usb_get_dr_mode_by_phy > >>check that this matches the phandle args[0] value when looking for > >>the otg controller. > >> > >>Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> > >>--- > >>Changes in v2: > >>-Add a args0 parameter instead of looking for nodes with a dr_mode property > >>Changes in v3: > >>-No changes > >>--- > >> drivers/usb/common/common.c | 31 ++++++++++++++++++------------- > >> drivers/usb/phy/phy-am335x.c | 2 +- > >> include/linux/usb/of.h | 4 ++-- > >> 3 files changed, 21 insertions(+), 16 deletions(-) > > > >This breaks am335x. > > > >[ 17.433166] /ocp/usb@47400000/usb@47401000: could not get #phy-cells > >for /ocp/usb@47400000/usb-phy@47401300 > >[ 17.443627] /ocp/usb@47400000/usb@47401800: could not get #phy-cells > >for /ocp/usb@47400000/usb-phy@47401b00 > >[ 17.454005] am335x-phy-driver 47401300.usb-phy: dr_mode 0 > >[ 17.460518] 47401300.usb-phy supply vcc not found, using dummy > >regulator > >[ 17.469685] /ocp/usb@47400000/usb@47401000: could not get #phy-cells > >for /ocp/usb@47400000/usb-phy@47401300 > >[ 17.479998] /ocp/usb@47400000/usb@47401800: could not get #phy-cells > >for /ocp/usb@47400000/usb-phy@47401b00 > >[ 17.490342] am335x-phy-driver 47401b00.usb-phy: dr_mode 0 > > That is weird, quoting: drivers/phy/phy-core.c: _of_phy_get(): > > ret = of_parse_phandle_with_args(np, "phys", "#phy-cells", > index, &args); > if (ret) > return ERR_PTR(-ENODEV); > > So if #phy-cells is not defined, then the phy core should not > be able to work with the dts files in question at all. am335x phy does not use phy framework, so those phy core api is not called. > > All my patch does is make the way of_usb_get_dr_mode_by_phy parses > phy-handles be identical to how phy-core.c does it. > > I see that the usb0_phy node in arch/arm/boot/dts/am33xx.dtsi > indeed lacks a "#phy-cells = <0>;" line. > > Quoting: Documentation/devicetree/bindings/phy/phy-bindings.txt > > PHY device node > =============== > > Required Properties: > #phy-cells: Number of cells in a PHY specifier; The meaning of all those > cells is defined by the binding for the phy node. The PHY > provider can use the values in cells to find the appropriate > PHY. > > So not having #phy-cells defined for a phy-node clearly is a bug. am335x phy does not follow the bindings in phy/, but usb/phy/. > > A patch like the following should fix this: > > diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi > index 52be48b..c4ff788d 100644 > --- a/arch/arm/boot/dts/am33xx.dtsi > +++ b/arch/arm/boot/dts/am33xx.dtsi > @@ -557,6 +557,7 @@ > }; > > usb0_phy: usb-phy@47401300 { > + #phy-cells = <0>; This seems to be ok, but this patch would break the dt backward compatible. > compatible = "ti,am335x-usb-phy"; > reg = <0x47401300 0x100>; > reg-names = "phy"; > > Regards, > > Hans Regards, -Bin. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html
WARNING: multiple messages have this Message-ID (diff)
From: b-liu@ti.com (Bin Liu) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 1/4] USB: Fix of_usb_get_dr_mode_by_phy with a shared phy block Date: Thu, 9 Jun 2016 14:49:36 -0500 [thread overview] Message-ID: <20160609194936.GB2167@uda0271908> (raw) In-Reply-To: <9a05c16a-e8a2-02b7-c093-1131e27bcdd4@redhat.com> Hi, On Thu, Jun 09, 2016 at 04:51:45PM +0200, Hans de Goede wrote: > Hi, > > On 09-06-16 16:30, Bin Liu wrote: > >Hi, > > > >On Sun, Jun 05, 2016 at 04:59:33PM +0200, Hans de Goede wrote: > >>Some SoCs have a single phy-hw-block with multiple phys, this is > >>modelled by a single phy dts node, so we end up with multiple > >>controller nodes with a phys property pointing to the phy-node > >>of the otg-phy. > >> > >>Only one of these controllers typically is an otg controller, yet we > >>were checking the first controller who uses a phy from the block and > >>then end up looking for a dr_mode property in e.g. the ehci controller. > >> > >>This commit fixes this by adding an arg0 parameter to > >>of_usb_get_dr_mode_by_phy and make of_usb_get_dr_mode_by_phy > >>check that this matches the phandle args[0] value when looking for > >>the otg controller. > >> > >>Signed-off-by: Hans de Goede <hdegoede@redhat.com> > >>--- > >>Changes in v2: > >>-Add a args0 parameter instead of looking for nodes with a dr_mode property > >>Changes in v3: > >>-No changes > >>--- > >> drivers/usb/common/common.c | 31 ++++++++++++++++++------------- > >> drivers/usb/phy/phy-am335x.c | 2 +- > >> include/linux/usb/of.h | 4 ++-- > >> 3 files changed, 21 insertions(+), 16 deletions(-) > > > >This breaks am335x. > > > >[ 17.433166] /ocp/usb at 47400000/usb at 47401000: could not get #phy-cells > >for /ocp/usb at 47400000/usb-phy at 47401300 > >[ 17.443627] /ocp/usb at 47400000/usb at 47401800: could not get #phy-cells > >for /ocp/usb at 47400000/usb-phy at 47401b00 > >[ 17.454005] am335x-phy-driver 47401300.usb-phy: dr_mode 0 > >[ 17.460518] 47401300.usb-phy supply vcc not found, using dummy > >regulator > >[ 17.469685] /ocp/usb at 47400000/usb at 47401000: could not get #phy-cells > >for /ocp/usb at 47400000/usb-phy at 47401300 > >[ 17.479998] /ocp/usb at 47400000/usb at 47401800: could not get #phy-cells > >for /ocp/usb at 47400000/usb-phy at 47401b00 > >[ 17.490342] am335x-phy-driver 47401b00.usb-phy: dr_mode 0 > > That is weird, quoting: drivers/phy/phy-core.c: _of_phy_get(): > > ret = of_parse_phandle_with_args(np, "phys", "#phy-cells", > index, &args); > if (ret) > return ERR_PTR(-ENODEV); > > So if #phy-cells is not defined, then the phy core should not > be able to work with the dts files in question at all. am335x phy does not use phy framework, so those phy core api is not called. > > All my patch does is make the way of_usb_get_dr_mode_by_phy parses > phy-handles be identical to how phy-core.c does it. > > I see that the usb0_phy node in arch/arm/boot/dts/am33xx.dtsi > indeed lacks a "#phy-cells = <0>;" line. > > Quoting: Documentation/devicetree/bindings/phy/phy-bindings.txt > > PHY device node > =============== > > Required Properties: > #phy-cells: Number of cells in a PHY specifier; The meaning of all those > cells is defined by the binding for the phy node. The PHY > provider can use the values in cells to find the appropriate > PHY. > > So not having #phy-cells defined for a phy-node clearly is a bug. am335x phy does not follow the bindings in phy/, but usb/phy/. > > A patch like the following should fix this: > > diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi > index 52be48b..c4ff788d 100644 > --- a/arch/arm/boot/dts/am33xx.dtsi > +++ b/arch/arm/boot/dts/am33xx.dtsi > @@ -557,6 +557,7 @@ > }; > > usb0_phy: usb-phy at 47401300 { > + #phy-cells = <0>; This seems to be ok, but this patch would break the dt backward compatible. > compatible = "ti,am335x-usb-phy"; > reg = <0x47401300 0x100>; > reg-names = "phy"; > > Regards, > > Hans Regards, -Bin.
next prev parent reply other threads:[~2016-06-09 19:49 UTC|newest] Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-06-05 14:59 [PATCH v3 1/4] USB: Fix of_usb_get_dr_mode_by_phy with a shared phy block Hans de Goede 2016-06-05 14:59 ` Hans de Goede [not found] ` <1465138776-6003-1-git-send-email-hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 2016-06-05 14:59 ` [PATCH v3 2/4] phy-sun4i-usb: Add support for peripheral-only mode Hans de Goede 2016-06-05 14:59 ` Hans de Goede [not found] ` <1465138776-6003-2-git-send-email-hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 2016-06-17 13:12 ` Kishon Vijay Abraham I 2016-06-17 13:12 ` Kishon Vijay Abraham I 2016-06-05 14:59 ` [PATCH v3 3/4] phy-sun4i-usb: Add workaround for missing Vbus det interrupts on A31 Hans de Goede 2016-06-05 14:59 ` Hans de Goede [not found] ` <1465138776-6003-3-git-send-email-hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 2016-06-17 13:12 ` Kishon Vijay Abraham I 2016-06-17 13:12 ` Kishon Vijay Abraham I 2016-06-05 14:59 ` [PATCH v3 4/4] musb: sunxi: Simplify dr_mode handling Hans de Goede 2016-06-05 14:59 ` Hans de Goede [not found] ` <1465138776-6003-4-git-send-email-hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 2016-06-08 10:23 ` Maxime Ripard 2016-06-08 10:23 ` Maxime Ripard 2016-06-08 10:30 ` Hans de Goede 2016-06-08 10:30 ` Hans de Goede [not found] ` <08af737c-f1f1-0966-0eca-24d4daa7423b-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 2016-06-15 19:30 ` Maxime Ripard 2016-06-15 19:30 ` Maxime Ripard 2016-06-10 14:53 ` Bin Liu 2016-06-10 14:53 ` Bin Liu 2016-06-09 14:30 ` [PATCH v3 1/4] USB: Fix of_usb_get_dr_mode_by_phy with a shared phy block Bin Liu 2016-06-09 14:30 ` Bin Liu 2016-06-09 14:51 ` Hans de Goede 2016-06-09 14:51 ` Hans de Goede [not found] ` <9a05c16a-e8a2-02b7-c093-1131e27bcdd4-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 2016-06-09 19:49 ` Bin Liu [this message] 2016-06-09 19:49 ` Bin Liu 2016-06-10 9:27 ` Hans de Goede 2016-06-10 9:27 ` Hans de Goede
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20160609194936.GB2167@uda0271908 \ --to=b-liu-l0cymroini0@public.gmane.org \ --cc=devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \ --cc=gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org \ --cc=hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org \ --cc=kishon-l0cyMroinI0@public.gmane.org \ --cc=linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org \ --cc=linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \ --cc=maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org \ --cc=wens-jdAy2FN1RRM@public.gmane.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.