diff options
| author | Julius Werner <jwerner@chromium.org> | 2014-10-22 14:12:50 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-04-10 07:50:21 +0200 |
| commit | 120aec0902663d2ed942c1542217791c46b8e406 (patch) | |
| tree | 8ed8ab12743869df69d509f43a35799526b570cf /payloads/libpayload/configs/defconfig | |
| parent | 907fd12cf6c10b2a3d1edec09b23be5eeb4b9643 (diff) | |
| download | coreboot-120aec0902663d2ed942c1542217791c46b8e406.tar.xz | |
serial: Combine Tegra and Rockchip UARTs to generic 8250_mmio32
We have two drivers for a 100%-identical peripheral right now, mostly
because we couldn't come up with a good common name for it back when we
checked it in. That seems like a pretty silly reason in the long run.
Both Tegra and Rockchip SoCs contain UARTs that use the common 8250
register interface (at least for the very basic byte-per-byte transmit
and receive parts we care about), memory-mapped with a 32-bit register
stride. This patch combines them to a single 8250_mmio32 driver (which
also fixes a problem when booting Rockchip without serial enabled, since
that driver forgot to check for serial initialization when registering
its console drivers). The register accesses are done using readl/writel
(as Rockchip did before), since the registers are documented as 32-bit
length (with top 24 bits RAZ/WI), although the Tegra SoC doesn't enforce
APB accesses to have the full word length. Also fixed checkpatch stuff.
A day may come when we can also merge this driver into the (completely
different, with more complicated features and #ifdefs) 8250 driver for
x86 (which has MMIO support for 8-bit register stride only), both here
and in coreboot. But it is not this day. This day I just want to get rid
of a 99% identical file without expending too much effort.
BUG=None
TEST=Booted on Veyron_Pinky and Nyan_Blaze with and without serial
enabled, both worked fine (although Veyron has another kernel issue).
Change-Id: I85c004a75cc5aa7cb40098002d3e00a62c1c5f2d
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: e7959c19356d2922aa414866016540ad9ee2ffa8
Original-Change-Id: Ib84d00f52ff2c48398c75f77f6a245e658ffdeb9
Original-Signed-off-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/225102
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/9387
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'payloads/libpayload/configs/defconfig')
| -rw-r--r-- | payloads/libpayload/configs/defconfig | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/payloads/libpayload/configs/defconfig b/payloads/libpayload/configs/defconfig index f5e13d5535..556b6198b7 100644 --- a/payloads/libpayload/configs/defconfig +++ b/payloads/libpayload/configs/defconfig @@ -41,8 +41,7 @@ CONFIG_LP_CBMEM_CONSOLE=y CONFIG_LP_SERIAL_CONSOLE=y CONFIG_LP_8250_SERIAL_CONSOLE=y # CONFIG_LP_S5P_SERIAL_CONSOLE is not set -# CONFIG_LP_TEGRA_SERIAL_CONSOLE is not set -# CONFIG_LP_RK_SERIAL_CONSOLE is not set +# CONFIG_LP_8250_MMIO32_SERIAL_CONSOLE is not set # CONFIG_LP_IPQ806X_SERIAL_CONSOLE is not set # CONFIG_LP_PL011_SERIAL_CONSOLE is not set CONFIG_LP_SERIAL_IOBASE=0x3f8 |