From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeremy Linton Subject: Re: [PATCH v3 0/5] ACPI: parse the SPCR table Date: Thu, 18 Feb 2016 15:15:44 -0600 Message-ID: <56C63480.5020605@arm.com> References: <1455559532-8305-1-git-send-email-aleksey.makarov@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1455559532-8305-1-git-send-email-aleksey.makarov@linaro.org> Sender: linux-kernel-owner@vger.kernel.org To: Aleksey Makarov , linux-acpi@vger.kernel.org Cc: Russell King , Graeme Gregory , Greg Kroah-Hartman , "Rafael J . Wysocki" , linux-kernel@vger.kernel.org, Leif Lindholm , Christopher Covington , linux-serial@vger.kernel.org, Al Stone , linux-arm-kernel@lists.infradead.org List-Id: linux-acpi@vger.kernel.org On 02/15/2016 12:05 PM, Aleksey Makarov wrote: > This patchset is based on the patchset by Leif Lindholm [1] > > 'ARM Server Base Boot Requirements' [2] mentions SPCR (Serial Port > Console Redirection Table) [3] as a mandatory ACPI table that > specifies the configuration of serial console. > > SPCR support is included in QEMU's ARM mach-virt since 2.4 release. > > Introduce a new function acpi_console_check(). At the uart port > registration, this function checks if the ACPI SPCR table specifies > its argument of type struct uart_port to be a console > and if so calls add_preferred_console(). > > Use SPCR to tell if SBSA serial driver should use 32-bit access to registers. > > To be able to access SPCR table each time any console is registered > change __init to __ref for early_acpi_os_unmap_memory(). > > The patchset should be applied to tty-next. (trimming) This works on the JunoR2 with a new enough firmware to have the SPCR table. Tested-by: Jeremy Linton From mboxrd@z Thu Jan 1 00:00:00 1970 From: jeremy.linton@arm.com (Jeremy Linton) Date: Thu, 18 Feb 2016 15:15:44 -0600 Subject: [PATCH v3 0/5] ACPI: parse the SPCR table In-Reply-To: <1455559532-8305-1-git-send-email-aleksey.makarov@linaro.org> References: <1455559532-8305-1-git-send-email-aleksey.makarov@linaro.org> Message-ID: <56C63480.5020605@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 02/15/2016 12:05 PM, Aleksey Makarov wrote: > This patchset is based on the patchset by Leif Lindholm [1] > > 'ARM Server Base Boot Requirements' [2] mentions SPCR (Serial Port > Console Redirection Table) [3] as a mandatory ACPI table that > specifies the configuration of serial console. > > SPCR support is included in QEMU's ARM mach-virt since 2.4 release. > > Introduce a new function acpi_console_check(). At the uart port > registration, this function checks if the ACPI SPCR table specifies > its argument of type struct uart_port to be a console > and if so calls add_preferred_console(). > > Use SPCR to tell if SBSA serial driver should use 32-bit access to registers. > > To be able to access SPCR table each time any console is registered > change __init to __ref for early_acpi_os_unmap_memory(). > > The patchset should be applied to tty-next. (trimming) This works on the JunoR2 with a new enough firmware to have the SPCR table. Tested-by: Jeremy Linton