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authorPaul Burton <paul.burton@imgtec.com>2016-08-26 15:17:35 +0100
committerRalf Baechle <ralf@linux-mips.org>2016-10-05 01:31:20 +0200
commitc11e3b48dbc367e38dfaea6e8a61d3b39f476685 (patch)
tree206ec739e07875e5cb77a71fe2fed8b9a7cbcba9 /arch/mips/configs
parentb6d5e47e67292542a41c3fe367bacb364eb4e601 (diff)
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MIPS: SEAD3: Probe UARTs using DT
Probe the UARTs on SEAD3 boards using device tree rather than platform code, in order to reduce the amount of the latter. This requires that CONFIG_SERIAL_OF_PLATFORM be enabled, so enable it in sead3_defconfig. The SEAD3 DT shim code is extended to read bootloader environment variables to determine the appropriate UART & mode for kernel console output & set the stdout-path property of the chosen node accordingly. In contrast to the old platform code, which appears to have only ever set "console=ttyS0,38400n8r" with the code in console_config never having an effect, this will honor the "yamontty" environment variable to select between the 2 UARTs on the board and then check the "modetty0" or "modetty1" variable as appropriate to determine the UART configuration. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14048/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/configs')
-rw-r--r--arch/mips/configs/sead3_defconfig2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/mips/configs/sead3_defconfig b/arch/mips/configs/sead3_defconfig
index dae9354b6256..deb48fb77d1f 100644
--- a/arch/mips/configs/sead3_defconfig
+++ b/arch/mips/configs/sead3_defconfig
@@ -39,6 +39,7 @@ CONFIG_MTD_CFI_INTELEXT=y
CONFIG_MTD_PHYSMAP=y
CONFIG_MTD_UBI=y
CONFIG_MTD_UBI_GLUEBI=y
+CONFIG_OF=y
CONFIG_BLK_DEV_LOOP=y
CONFIG_BLK_DEV_CRYPTOLOOP=m
CONFIG_SCSI=y
@@ -70,6 +71,7 @@ CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_NR_UARTS=2
CONFIG_SERIAL_8250_RUNTIME_UARTS=2
+CONFIG_SERIAL_OF_PLATFORM=y
# CONFIG_HW_RANDOM is not set
CONFIG_I2C=y
# CONFIG_I2C_COMPAT is not set