linux-kernel - Re: [PATCH v2 4/4] ARM: dts: keystone: Add "ti,da830-uart" compatible string

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <93c4aed0-6faa-2c27-7931-454fc1f48e79@oracle.com>
Date:   Wed, 4 Jan 2017 14:00:01 -0800
From:   Santosh Shilimkar <santosh.shilimkar@...cle.com>
To:     David Lechner <david@...hnology.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sekhar Nori <nsekhar@...com>,
        Santosh Shilimkar <ssantosh@...nel.org>
Cc:     Franklin S Cooper Jr <fcooper@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Kevin Hilman <khilman@...nel.org>,
        Axel Haslam <ahaslam@...libre.com>,
        Alexandre Bailon <abailon@...libre.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Jiri Slaby <jslaby@...e.com>, linux-serial@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 4/4] ARM: dts: keystone: Add "ti,da830-uart" compatible
 string

On 1/4/2017 12:30 PM, David Lechner wrote:
> The TI Keystone SoCs have extra UART registers beyond the standard 8250
> registers, so we need a new compatible string to indicate this. Also, at
> least one of these registers uses the full 32 bits, so we need to specify
> reg-io-width in addition to reg-shift.
>
> "ns16550a" is left in the compatible specification since it does work as
> long as the bootloader configures the SoC UART power management registers.
>
NAK!!
We can't break the booting boards with existing boot loaders.
I suggest you to first get the driver updated to take care of
the UART PM register and then enable the support for it.