From: Michael Trimarchi <michael@amarulasolutions.com> To: "Pali Rohár" <pali.rohar@gmail.com> Cc: "Tony Lindgren" <tony@atomide.com>, "Frank Rowand" <frowand.list@gmail.com>, "Arnd Bergmann" <arnd@arndb.de>, "Pavel Machek" <pavel@ucw.cz>, "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>, "Russell King - ARM Linux" <linux@arm.linux.org.uk>, "Laura Abbott" <lauraa@codeaurora.org>, "Grant Likely" <grant.likely@linaro.org>, "Rob Herring" <robherring2@gmail.com>, "Will Deacon" <will.deacon@arm.com>, "Ivaylo Dimitrov" <ivo.g.dimitrov.75@gmail.com>, "Sebastian Reichel" <sre@debian.org>, "Andreas Färber" <afaerber@suse.de>, linux-arm-kernel <linux-arm-kernel@lists.infradead.org>, LKML <linux-kernel@vger.kernel.org>, "Linux OMAP Mailing List" <linux-omap@vger.kernel.org> Subject: Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Date: Fri, 27 Nov 2015 09:52:05 +0100 [thread overview] Message-ID: <CAOf5uw==sROkdOU-mEEE2iqBECkX5XcqY_2kNxc1ZJFW+j7niw@mail.gmail.com> (raw) In-Reply-To: <CAOf5uwn_3gY=xE8gBS2hZ-O4ZBZruxYRN8a_hO0bqCHy-yA2Gg@mail.gmail.com> Hi On Fri, Nov 27, 2015 at 9:44 AM, Michael Trimarchi <michael@amarulasolutions.com> wrote: > Hi > > On Fri, Nov 27, 2015 at 9:38 AM, Pali Rohár <pali.rohar@gmail.com> wrote: >> On Thursday 26 November 2015 12:39:30 Tony Lindgren wrote: >>> Just to explore options.. How about make a minimal device driver that >>> just loads the atags blob from /lib/firmware and then shows it in >>> /proc/atags? Of course some checking on the atags should be done by >>> the driver.. >> >> And who can dynamically create that blob file in /lib/firmware? If >> kernel does not export those atags (somehow) from bootloader, then >> userspace is not able to create that blob... cyclic problem. >> > > Are those atags from bootloader fix or they change device by device. If they > are fixed they can be included in some firmware and get from the disk. > Sorry, miss the second part of email ;) Michael > Michael > >> So no, problem is that bootloader provides via custom atags dynamic >> information like: boot reason (how was device started, by rtc alarm? by >> reboot? by usb charger? by power button?), boot mode (should be enter >> into firmware update mode?, is this normal boot mode?), ... and those >> information are needed for some proprietary software (e.g. firmware >> upgrade/flash) but also by any other open source applications (based on >> usb charger we enter different runlevel -- for just only charging >> device). >> >> -- >> Pali Rohár >> pali.rohar@gmail.com >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-omap" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html -- | Michael Nazzareno Trimarchi Amarula Solutions BV | | COO - Founder Cruquiuskade 47 | | +31(0)851119172 Amsterdam 1018 AM NL | | [`as] http://www.amarulasolutions.com |
WARNING: multiple messages have this Message-ID (diff)
From: michael@amarulasolutions.com (Michael Trimarchi) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Date: Fri, 27 Nov 2015 09:52:05 +0100 [thread overview] Message-ID: <CAOf5uw==sROkdOU-mEEE2iqBECkX5XcqY_2kNxc1ZJFW+j7niw@mail.gmail.com> (raw) In-Reply-To: <CAOf5uwn_3gY=xE8gBS2hZ-O4ZBZruxYRN8a_hO0bqCHy-yA2Gg@mail.gmail.com> Hi On Fri, Nov 27, 2015 at 9:44 AM, Michael Trimarchi <michael@amarulasolutions.com> wrote: > Hi > > On Fri, Nov 27, 2015 at 9:38 AM, Pali Roh?r <pali.rohar@gmail.com> wrote: >> On Thursday 26 November 2015 12:39:30 Tony Lindgren wrote: >>> Just to explore options.. How about make a minimal device driver that >>> just loads the atags blob from /lib/firmware and then shows it in >>> /proc/atags? Of course some checking on the atags should be done by >>> the driver.. >> >> And who can dynamically create that blob file in /lib/firmware? If >> kernel does not export those atags (somehow) from bootloader, then >> userspace is not able to create that blob... cyclic problem. >> > > Are those atags from bootloader fix or they change device by device. If they > are fixed they can be included in some firmware and get from the disk. > Sorry, miss the second part of email ;) Michael > Michael > >> So no, problem is that bootloader provides via custom atags dynamic >> information like: boot reason (how was device started, by rtc alarm? by >> reboot? by usb charger? by power button?), boot mode (should be enter >> into firmware update mode?, is this normal boot mode?), ... and those >> information are needed for some proprietary software (e.g. firmware >> upgrade/flash) but also by any other open source applications (based on >> usb charger we enter different runlevel -- for just only charging >> device). >> >> -- >> Pali Roh?r >> pali.rohar at gmail.com >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-omap" in >> the body of a message to majordomo at vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html -- | Michael Nazzareno Trimarchi Amarula Solutions BV | | COO - Founder Cruquiuskade 47 | | +31(0)851119172 Amsterdam 1018 AM NL | | [`as] http://www.amarulasolutions.com |
next prev parent reply other threads:[~2015-11-27 8:52 UTC|newest] Thread overview: 160+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-07-06 20:26 [PATCH 0/5] ATAGs to DT patches Pali Rohár 2015-07-06 20:26 ` Pali Rohár 2015-07-06 20:26 ` [PATCH 1/5] arm: devtree: Set system_rev from DT "/revision" Pali Rohár 2015-07-06 20:26 ` Pali Rohár 2015-07-06 20:26 ` Pali Rohár 2015-12-24 19:02 ` Pali Rohár 2015-12-24 19:02 ` Pali Rohár 2015-12-24 19:02 ` Pali Rohár 2015-12-28 21:01 ` Frank Rowand 2015-12-28 21:01 ` Frank Rowand 2015-12-28 21:01 ` Frank Rowand 2015-12-28 22:27 ` Arnd Bergmann 2015-12-28 22:27 ` Arnd Bergmann 2015-12-28 22:27 ` Arnd Bergmann 2016-01-05 11:37 ` Pali Rohár 2016-01-05 11:37 ` Pali Rohár 2016-01-05 11:37 ` Pali Rohár 2016-01-05 11:37 ` Pali Rohár 2016-01-05 11:45 ` Arnd Bergmann 2016-01-05 11:45 ` Arnd Bergmann 2016-01-05 11:45 ` Arnd Bergmann 2016-02-05 18:15 ` [PATCH] ARM: RX51: Set system_rev from ATAGS Ivaylo Dimitrov 2016-02-05 18:15 ` Ivaylo Dimitrov 2016-02-08 20:48 ` Tony Lindgren 2016-02-08 20:48 ` Tony Lindgren 2016-02-08 21:10 ` Pali Rohár 2016-02-08 21:10 ` Pali Rohár 2016-02-09 16:17 ` Tony Lindgren 2016-02-09 16:17 ` Tony Lindgren 2016-02-10 18:23 ` [PATCH v1] " Ivaylo Dimitrov 2016-02-10 18:23 ` Ivaylo Dimitrov 2016-02-11 0:19 ` Tony Lindgren 2016-02-11 0:19 ` Tony Lindgren 2015-07-06 20:26 ` [PATCH 2/5] arm: boot: convert ATAG_REVISION to DT "/revision" entry Pali Rohár 2015-07-06 20:26 ` Pali Rohár 2015-07-06 20:26 ` Pali Rohár 2015-07-06 20:26 ` [PATCH 3/5] arm: atags: Fix declaration of function save_atags Pali Rohár 2015-07-06 20:26 ` Pali Rohár 2015-07-06 20:26 ` [PATCH 4/5] arm: devtree: Read ATAGs structure from DT "/chosen/linux,atags" entry Pali Rohár 2015-07-06 20:26 ` [PATCH 4/5] arm: devtree: Read ATAGs structure from DT "/chosen/linux, atags" entry Pali Rohár 2015-07-06 20:26 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Pali Rohár 2015-07-06 20:26 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux, atags" entry Pali Rohár 2015-07-07 11:32 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Russell King - ARM Linux 2015-07-07 11:32 ` Russell King - ARM Linux 2015-07-07 11:58 ` Pali Rohár 2015-07-07 11:58 ` Pali Rohár 2015-07-13 13:19 ` Tony Lindgren 2015-07-13 13:19 ` Tony Lindgren 2015-10-12 20:16 ` Tony Lindgren 2015-10-12 20:16 ` Tony Lindgren 2015-10-12 20:25 ` Pali Rohár 2015-10-12 20:25 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux, atags" entry Pali Rohár 2015-10-12 20:45 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Tony Lindgren 2015-10-12 20:45 ` Tony Lindgren 2015-10-13 14:37 ` Pali Rohár 2015-10-13 14:37 ` Pali Rohár 2015-11-05 11:40 ` Pali Rohár 2015-11-05 11:40 ` Pali Rohár 2015-11-05 16:17 ` Tony Lindgren 2015-11-05 16:17 ` Tony Lindgren 2015-11-12 1:10 ` Frank Rowand 2015-11-12 1:10 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux, atags" entry Frank Rowand 2015-11-22 6:51 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Pavel Machek 2015-11-22 6:51 ` Pavel Machek 2015-11-23 14:45 ` Pali Rohár 2015-11-23 14:45 ` Pali Rohár 2015-11-23 14:45 ` Pali Rohár 2015-11-25 18:16 ` Tony Lindgren 2015-11-25 18:16 ` Tony Lindgren 2015-11-25 18:16 ` Tony Lindgren 2015-11-25 19:48 ` Arnd Bergmann 2015-11-25 19:48 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux, atags" entry Arnd Bergmann 2015-11-25 21:03 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Tony Lindgren 2015-11-25 21:03 ` Tony Lindgren 2015-11-25 21:03 ` Tony Lindgren 2015-11-25 21:29 ` Arnd Bergmann 2015-11-25 21:29 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux, atags" entry Arnd Bergmann 2015-11-25 21:44 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Pali Rohár 2015-11-25 21:44 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux, atags" entry Pali Rohár 2015-11-25 21:44 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Pali Rohár 2015-11-25 21:51 ` Arnd Bergmann 2015-11-25 21:51 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux, atags" entry Arnd Bergmann 2015-11-25 22:00 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Pali Rohár 2015-11-25 22:00 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux, atags" entry Pali Rohár 2015-11-26 4:19 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Frank Rowand 2015-11-26 4:19 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux, atags" entry Frank Rowand 2015-11-26 9:07 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Pali Rohár 2015-11-26 9:07 ` Pali Rohár 2015-11-26 20:39 ` Tony Lindgren 2015-11-26 20:39 ` Tony Lindgren 2015-11-26 20:39 ` Tony Lindgren 2015-11-26 21:12 ` Ivaylo Dimitrov 2015-11-26 21:12 ` Ivaylo Dimitrov 2015-11-27 8:38 ` Pali Rohár 2015-11-27 8:38 ` Pali Rohár 2015-11-27 8:44 ` Michael Trimarchi 2015-11-27 8:44 ` Michael Trimarchi 2015-11-27 8:44 ` Michael Trimarchi 2015-11-27 8:52 ` Michael Trimarchi [this message] 2015-11-27 8:52 ` Michael Trimarchi 2015-11-27 14:51 ` Tony Lindgren 2015-11-27 14:51 ` Tony Lindgren 2015-11-27 13:27 ` Russell King - ARM Linux 2015-11-27 13:27 ` Russell King - ARM Linux 2015-11-27 19:51 ` Russell King - ARM Linux 2015-11-27 19:51 ` Russell King - ARM Linux 2015-11-27 19:51 ` Russell King - ARM Linux 2015-11-27 21:06 ` Arnd Bergmann 2015-11-27 21:06 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux, atags" entry Arnd Bergmann 2015-11-27 23:28 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Nicolas Pitre 2015-11-27 23:28 ` Nicolas Pitre 2015-11-27 23:28 ` Nicolas Pitre 2015-11-28 12:27 ` Arnd Bergmann 2015-11-28 12:27 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux, atags" entry Arnd Bergmann 2015-11-28 12:27 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Arnd Bergmann 2015-11-28 12:54 ` Russell King - ARM Linux 2015-11-28 12:54 ` Russell King - ARM Linux 2015-11-28 12:54 ` Russell King - ARM Linux 2015-11-28 12:33 ` Russell King - ARM Linux 2015-11-28 12:33 ` Russell King - ARM Linux 2015-11-28 17:34 ` Nicolas Pitre 2015-11-28 17:34 ` Nicolas Pitre 2015-11-28 21:02 ` Frank Rowand 2015-11-28 21:02 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux, atags" entry Frank Rowand 2015-11-28 21:02 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Frank Rowand 2015-11-29 18:09 ` Russell King - ARM Linux 2015-11-29 18:09 ` Russell King - ARM Linux 2015-11-29 18:09 ` Russell King - ARM Linux 2015-11-29 18:19 ` Pali Rohár 2015-11-29 18:19 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux, atags" entry Pali Rohár 2015-11-29 23:13 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Russell King - ARM Linux 2015-11-29 23:13 ` Russell King - ARM Linux 2015-11-30 0:09 ` Nicolas Pitre 2015-11-30 0:09 ` Nicolas Pitre 2015-11-30 0:15 ` Pali Rohár 2015-11-30 0:15 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux, atags" entry Pali Rohár 2015-11-30 0:15 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Pali Rohár 2015-11-30 15:23 ` Tony Lindgren 2015-11-30 15:23 ` Tony Lindgren 2015-11-30 15:23 ` Tony Lindgren 2015-11-30 15:39 ` Pali Rohár 2015-11-30 15:39 ` Pali Rohár 2015-11-30 15:39 ` Pali Rohár 2015-11-30 16:09 ` Nicolas Pitre 2015-11-30 16:09 ` Nicolas Pitre 2015-12-15 9:33 ` Pali Rohár 2015-12-15 9:33 ` Pali Rohár 2015-12-15 11:04 ` Arnd Bergmann 2015-12-15 11:04 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux, atags" entry Arnd Bergmann 2015-12-15 12:20 ` [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Russell King - ARM Linux 2015-12-15 12:20 ` Russell King - ARM Linux 2015-12-15 17:24 ` Nicolas Pitre 2015-12-15 17:24 ` Nicolas Pitre 2015-12-15 17:24 ` Nicolas Pitre 2015-12-23 14:54 ` Ivaylo Dimitrov 2015-12-23 14:54 ` Ivaylo Dimitrov 2015-11-28 4:06 ` [PATCH 0/5] ATAGs to DT patches Frank Rowand 2015-11-28 4:06 ` Frank Rowand 2015-11-28 5:55 ` Frank Rowand 2015-11-28 5:55 ` Frank Rowand
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