From mboxrd@z Thu Jan 1 00:00:00 1970 From: aleksey.makarov@linaro.org (Aleksey Makarov) Date: Mon, 25 Jan 2016 21:07:12 +0600 Subject: [PATCH 2/3] ACPI: parse SPCR and enable matching console In-Reply-To: References: <1453722324-22407-1-git-send-email-aleksey.makarov@linaro.org> <1453722324-22407-3-git-send-email-aleksey.makarov@linaro.org> Message-ID: <56A63A20.4040602@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 25.01.2016 20:14, Andy Shevchenko wrote: > On Mon, Jan 25, 2016 at 1:45 PM, Aleksey Makarov > wrote: >> 'ARM Server Base Boot Requiremets' [1] mention SPCR >> (Serial Port Console Redirection Table) [2] as a mandatory ACPI table >> that specifies the configuration of serial console. >> >> Parse this table and check if any registered console match >> the description. If it does, enable that console. >> >> To implement that, introduce a new member >> int (*acpi_match)(struct console *, struct acpi_table_spcr *) >> of struct console. It allows drivers to check if they provide >> a matching console device. >> >> [1] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.den0044a/index.html >> [2] http://msdn.microsoft.com/en-us/library/windows/hardware/dn639131(v=vs.85).aspx > > Can you split this to several patches? I am not sure I should. > I see preparatory patch in console code, i.e. > delete_from_console_list(), adding SPCR support to ACPI, enabling it. It would be difficult to justify delete_from_console_list() in a separate patches before the rest of the changes. And enabling SPCR in a separate patch also looks oddly for me. It would be great to have other comments on this before I fix this in the next version. Thank you