From: Peter Hurley <peter@hurleysoftware.com>
To: Doug Anderson <dianders@chromium.org>,
Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Ulf Hansson <ulf.hansson@linaro.org>,
Jaehoon Chung <jh80.chung@samsung.com>,
Shawn Lin <shawn.lin@rock-chips.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Stefan Agner <stefan@agner.ch>,
"linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
Brian Norris <computersforpeace@gmail.com>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Heiko Stuebner <heiko@sntech.de>,
Jisheng Zhang <jszhang@marvell.com>,
"open list:ARM/Rockchip SoC..."
<linux-rockchip@lists.infradead.org>,
devicetree-spec@vger.kernel.org,
Mark Rutland <mark.rutland@arm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Venu Byravarasu <vbyravarasu@nvidia.com>,
Lars-Peter Clausen <lars@metafoo.de>,
Jon Hunter <jonathanh@nvidia.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
Pawel Moll <pawel.moll@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Grant Grundler <grundler@chromium.org>,
Kumar Gala <galak@codeaurora.org>,
"Luca Porzio (lporzio)" <lporzio@micron.com>,
Rob Herring <robh+dt@kernel.org>,
Chaotian Jing <chaotian.jing@mediatek.com>,
Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>,
Sudeep Holla <sudeep.holla@arm.com>,
zhonghui.fu@linux.intel.com, kirill.shutemov@linux.intel.com
Subject: Re: [PATCH v2 0/4] Patches to allow consistent mmc / mmcblk numbering w/ device tree
Date: Fri, 29 Apr 2016 16:58:12 -0700 [thread overview]
Message-ID: <5723F514.4@hurleysoftware.com> (raw)
In-Reply-To: <CAD=FV=U5jnJJ3v=nFGFecoKB5KGv1ufC+aKbHx2iCqBTWpDTww@mail.gmail.com>
On 04/29/2016 04:01 PM, Doug Anderson wrote:
> * serial allows numbering devices by alias.
Which is in fact a total nightmare.
While stable device order is mandatory in serial because of
console command line parameters and existing userspace expectations,
it is the number one barrier to providing a shared ttyS namespace
for mixed uart platforms.
Stable device order has a very real (and often unforeseen) maintenance
burden.
For example, I noticed these patches are strictly for DT.
I'm assuming that's because guaranteeing stable device order for
mmc in general is more difficult; eg., by performing minimal scan
serially and more expensive portion of the probe async.
Regards,
Peter Hurley
next prev parent reply other threads:[~2016-04-29 23:58 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-29 17:32 [PATCH v2 0/4] Patches to allow consistent mmc / mmcblk numbering w/ device tree Douglas Anderson
2016-04-29 17:32 ` [PATCH v2 1/4] Documentation: mmc: Document mmc aliases Douglas Anderson
2016-04-29 17:32 ` [PATCH v2 2/4] mmc: read mmc alias from device tree Douglas Anderson
2016-04-29 17:32 ` [PATCH v2 3/4] mmc: use SD/MMC host ID for block device name ID Douglas Anderson
2016-04-29 17:32 ` [PATCH v2 4/4] ARM: dts: rockchip: Add mmc aliases for rk3288 platform Douglas Anderson
2016-04-29 18:12 ` [PATCH v2 0/4] Patches to allow consistent mmc / mmcblk numbering w/ device tree Rob Herring
2016-04-29 19:31 ` Doug Anderson
2016-04-29 19:50 ` Russell King - ARM Linux
2016-04-29 20:02 ` Doug Anderson
2016-04-29 18:12 ` Russell King - ARM Linux
2016-04-29 19:43 ` Doug Anderson
2016-04-29 19:57 ` Russell King - ARM Linux
2016-04-29 20:04 ` Doug Anderson
2016-04-29 21:13 ` Russell King - ARM Linux
2016-04-29 21:17 ` Doug Anderson
2016-04-29 21:29 ` Russell King - ARM Linux
2016-04-29 21:39 ` Doug Anderson
2016-04-29 21:50 ` Russell King - ARM Linux
2016-04-29 21:56 ` Doug Anderson
2016-04-29 22:16 ` Russell King - ARM Linux
2016-04-29 22:22 ` Doug Anderson
2016-04-29 22:44 ` Russell King - ARM Linux
2016-04-29 23:01 ` Doug Anderson
2016-04-29 23:58 ` Peter Hurley [this message]
[not found] ` <CAD=FV=V_YyfBOSs7BLkyhv=_5HBmf3djUWACbL6d-bwnrueDjA@mail.gmail.com>
2016-04-30 0:31 ` Peter Hurley
2016-04-30 2:29 ` Doug Anderson
2016-04-30 8:38 ` Russell King - ARM Linux
2016-04-30 13:23 ` Rob Herring
2016-04-29 22:42 ` Javier Martinez Canillas
2016-04-30 10:48 ` Russell King - ARM Linux
2016-05-03 19:17 ` Trent Piepho
2016-05-04 7:18 ` Pavel Machek
2016-05-04 12:25 ` Rob Herring
2016-05-04 12:46 ` Pavel Machek
2019-03-05 12:39 ` Måns Rullgård
2019-03-15 21:52 ` Tim Harvey
2019-03-15 23:00 ` Marek Vasut
2019-03-15 23:13 ` Tim Harvey
2019-03-15 23:23 ` Doug Anderson
[not found] ` <yw1xftrn2em9.fsf@mansr.com>
2019-03-16 12:33 ` Marek Vasut
2019-03-16 15:39 ` Russell King - ARM Linux admin
2019-03-17 15:05 ` Stefan Agner
2019-03-17 15:43 ` Russell King - ARM Linux admin
2019-03-17 15:50 ` Marek Vasut
2019-03-17 16:48 ` Måns Rullgård
2019-03-17 16:59 ` Russell King - ARM Linux admin
2019-03-27 17:37 ` Tim Harvey
2019-03-27 20:54 ` Russell King - ARM Linux admin
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