Microsoft Debug Port Table (DBGP or DBG2) is used by the Windows SoC platforms to describe their debugging facilities. Recent Low Power Intel Architecture (LPIA) platforms have utilized this for the SPI UART debug ports that are resident on their debug boards. This patch set enables the DBGP/DBG2 debug ports as an Linux early console launcher. The SPI UART debug ports support is also refined to co-exist with this new usage model. To use this facility on LPIA platforms, you need to enable the following kernel configurations: CONFIG_EARLY_PRINTK_ACPI=y CONFIG_EARLY_PRINTK_INTEL_MID_SPI=y Then you need to append the following kernel parameter to the kernel command line in your the boot loader configuration file: earlyprintk=acpi Version 3 of this patch set is the first version that will be published in the Linux community. Earlier versions are reviewed internally in Intel. This patch set keeps the version number to track the history that is known to Intel internal developers. Lv Zheng (2): ACPI: Add early console framework for DBGP/DBG2. ACPI: Add Intel MID SPI early console support. Documentation/kernel-parameters.txt | 1 + arch/x86/Kconfig.debug | 25 ++++ arch/x86/include/asm/mrst.h | 2 +- arch/x86/kernel/acpi/boot.c | 1 + arch/x86/kernel/early_printk.c | 25 +++- arch/x86/platform/mrst/early_printk_mrst.c | 186 +---------------------- drivers/acpi/Makefile | 2 + drivers/acpi/early_printk.c | 201 +++++++++++++++++++++++++ drivers/platform/x86/Makefile | 2 + drivers/platform/x86/early/Makefile | 5 + drivers/platform/x86/early/intel_mid_spi.c | 220 ++++++++++++++++++++++++++++ include/acpi/actbl2.h | 1 + include/linux/acpi.h | 24 +++ include/linux/intel_mid_early.h | 12 ++ 14 files changed, 526 insertions(+), 181 deletions(-) create mode 100644 drivers/acpi/early_printk.c create mode 100644 drivers/platform/x86/early/Makefile create mode 100644 drivers/platform/x86/early/intel_mid_spi.c create mode 100644 include/linux/intel_mid_early.h -- 1.7.10 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
