From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> To: Thierry Reding <thierry.reding@gmail.com> Cc: Jassi Brar <jassisinghbrar@gmail.com>, Jiri Slaby <jslaby@suse.com>, Mikko Perttunen <mperttunen@nvidia.com>, Jon Hunter <jonathanh@nvidia.com>, Timo Alho <talho@nvidia.com>, Pekka Pessi <ppessi@nvidia.com>, Mika Liljeberg <mliljeberg@nvidia.com>, linux-tegra@vger.kernel.org, linux-serial@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 7/9] serial: Add Tegra Combined UART driver Date: Mon, 12 Nov 2018 10:03:01 -0800 [thread overview] Message-ID: <20181112180301.GB28739@kroah.com> (raw) In-Reply-To: <20181112153014.GA29481@ulmo> On Mon, Nov 12, 2018 at 04:30:14PM +0100, Thierry Reding wrote: > On Fri, Nov 09, 2018 at 09:05:26AM -0800, Greg Kroah-Hartman wrote: > > On Fri, Oct 26, 2018 at 01:16:36PM +0200, Thierry Reding wrote: > > > From: Thierry Reding <treding@nvidia.com> > > > > > > The Tegra Combined UART (TCU) is a mailbox-based mechanism that allows > > > multiplexing multiple "virtual UARTs" into a single hardware serial > > > port. The TCU is the primary serial port on Tegra194 devices. > > > > > > Add a TCU driver utilizing the mailbox framework, as the used mailboxes > > > are part of Tegra HSP blocks that are already controlled by the Tegra > > > HSP mailbox driver. > > > > > > Based on work by Mikko Perttunen <mperttunen@nvidia.com>. > > > > > > Signed-off-by: Thierry Reding <treding@nvidia.com> > > > > Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > > Thanks. I just sent out v2 addressing Pekka's comments on the series. > But I'm slightly confused now. Are you expecting anyone else to pick > this up? There are technically no build time dependencies between any > of these patches, so it should be fine to pick them all into the > corresponding subsystem trees. Ah, I thought there was a built-time dependancy, that's why I gave my ack. > Perhaps the only thing to note is that there is a runtime dependency > from this patch on patches 1 and 2 in the series. Patch 1 is required to > make blocking a mailbox possible in interrupt context, which we need in > the TCU driver because the TTY and console paths do end up calling the > mbox_send_message() from interrupt context. Patch 2 is only required at > runtime if the two mailboxes are provided by different instances of the > HSP block (which they are for TCU on Tegra194). > > Would you prefer for Jassi to pick up the TCU patch along with the > mailbox core and driver changes so that we deal with the runtime > dependencies that way? > > Alternatively, if Jassi is okay with the mailbox changes, I can pick up > all of the v2 series of the patches into stable branches for v4.21, deal > with the dependencies there and send out pull requests for everyone to > merge into their subsystem trees. I don't really care either way, whatever is easiest for you all is fine with me. thanks, greg k-h
WARNING: multiple messages have this Message-ID (diff)
From: gregkh@linuxfoundation.org (Greg Kroah-Hartman) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 7/9] serial: Add Tegra Combined UART driver Date: Mon, 12 Nov 2018 10:03:01 -0800 [thread overview] Message-ID: <20181112180301.GB28739@kroah.com> (raw) In-Reply-To: <20181112153014.GA29481@ulmo> On Mon, Nov 12, 2018 at 04:30:14PM +0100, Thierry Reding wrote: > On Fri, Nov 09, 2018 at 09:05:26AM -0800, Greg Kroah-Hartman wrote: > > On Fri, Oct 26, 2018 at 01:16:36PM +0200, Thierry Reding wrote: > > > From: Thierry Reding <treding@nvidia.com> > > > > > > The Tegra Combined UART (TCU) is a mailbox-based mechanism that allows > > > multiplexing multiple "virtual UARTs" into a single hardware serial > > > port. The TCU is the primary serial port on Tegra194 devices. > > > > > > Add a TCU driver utilizing the mailbox framework, as the used mailboxes > > > are part of Tegra HSP blocks that are already controlled by the Tegra > > > HSP mailbox driver. > > > > > > Based on work by Mikko Perttunen <mperttunen@nvidia.com>. > > > > > > Signed-off-by: Thierry Reding <treding@nvidia.com> > > > > Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > > Thanks. I just sent out v2 addressing Pekka's comments on the series. > But I'm slightly confused now. Are you expecting anyone else to pick > this up? There are technically no build time dependencies between any > of these patches, so it should be fine to pick them all into the > corresponding subsystem trees. Ah, I thought there was a built-time dependancy, that's why I gave my ack. > Perhaps the only thing to note is that there is a runtime dependency > from this patch on patches 1 and 2 in the series. Patch 1 is required to > make blocking a mailbox possible in interrupt context, which we need in > the TCU driver because the TTY and console paths do end up calling the > mbox_send_message() from interrupt context. Patch 2 is only required at > runtime if the two mailboxes are provided by different instances of the > HSP block (which they are for TCU on Tegra194). > > Would you prefer for Jassi to pick up the TCU patch along with the > mailbox core and driver changes so that we deal with the runtime > dependencies that way? > > Alternatively, if Jassi is okay with the mailbox changes, I can pick up > all of the v2 series of the patches into stable branches for v4.21, deal > with the dependencies there and send out pull requests for everyone to > merge into their subsystem trees. I don't really care either way, whatever is easiest for you all is fine with me. thanks, greg k-h
next prev parent reply other threads:[~2018-11-12 18:03 UTC|newest] Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-10-26 11:16 [PATCH 0/9] serial: Add Tegra Combined UART driver Thierry Reding 2018-10-26 11:16 ` Thierry Reding 2018-10-26 11:16 ` [PATCH 1/9] mailbox: Support blocking transfers in atomic context Thierry Reding 2018-10-26 11:16 ` Thierry Reding 2018-10-26 11:16 ` [PATCH 2/9] mailbox: Allow multiple controllers per device Thierry Reding 2018-10-26 11:16 ` Thierry Reding 2018-10-26 11:16 ` [PATCH 3/9] dt-bindings: tegra186-hsp: Add shared interrupts Thierry Reding 2018-10-26 11:16 ` Thierry Reding 2018-10-26 11:16 ` [PATCH 4/9] mailbox: tegra-hsp: Add support for shared mailboxes Thierry Reding 2018-10-26 11:16 ` Thierry Reding 2018-10-29 10:04 ` Pekka Pessi 2018-10-29 10:04 ` Pekka Pessi 2018-10-29 10:04 ` Pekka Pessi 2018-10-29 10:39 ` Thierry Reding 2018-10-29 10:39 ` Thierry Reding 2018-10-29 12:25 ` Pekka Pessi 2018-10-29 12:25 ` Pekka Pessi 2018-10-29 12:25 ` Pekka Pessi 2018-10-29 13:16 ` Thierry Reding 2018-10-29 13:16 ` Thierry Reding 2018-10-30 16:15 ` Pekka Pessi 2018-10-30 16:15 ` Pekka Pessi 2018-10-30 16:15 ` Pekka Pessi 2018-10-26 11:16 ` [PATCH 5/9] mailbox: tegra-hsp: Add suspend/resume support Thierry Reding 2018-10-26 11:16 ` Thierry Reding 2018-10-26 11:16 ` [PATCH 6/9] dt-bindings: serial: Add bindings for nvidia,tegra194-tcu Thierry Reding 2018-10-26 11:16 ` [PATCH 6/9] dt-bindings: serial: Add bindings for nvidia, tegra194-tcu Thierry Reding 2018-10-26 11:16 ` [PATCH 7/9] serial: Add Tegra Combined UART driver Thierry Reding 2018-10-26 11:16 ` Thierry Reding 2018-11-09 17:05 ` Greg Kroah-Hartman 2018-11-09 17:05 ` Greg Kroah-Hartman 2018-11-12 15:30 ` Thierry Reding 2018-11-12 15:30 ` Thierry Reding 2018-11-12 18:03 ` Greg Kroah-Hartman [this message] 2018-11-12 18:03 ` Greg Kroah-Hartman 2018-10-26 11:16 ` [PATCH 8/9] arm64: tegra: Add nodes for TCU on Tegra194 Thierry Reding 2018-10-26 11:16 ` Thierry Reding 2018-10-26 11:16 ` [PATCH 9/9] arm64: tegra: Mark TCU as primary serial port on Tegra194 P2888 Thierry Reding 2018-10-26 11:16 ` Thierry Reding 2018-10-29 9:04 ` [PATCH 0/9] serial: Add Tegra Combined UART driver Pekka Pessi 2018-10-29 9:04 ` Pekka Pessi 2018-10-29 9:04 ` Pekka Pessi 2018-10-29 10:11 ` Thierry Reding 2018-10-29 10:11 ` Thierry Reding
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