xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ARC: [axs101] support early 8250 uart

Browse Source 
Earlycon calculates UART clock as "BASE_BAUD * 16". In case of ARC
"BASE_BAUD" is calculated dynamically in runtime, basically it is an
alias to arc_early_base_baud(), which in turn just does
"arc_base_baud/16".

8250 UART on AXS/SDP board uses 33.3MHz clock source which is set in
"arc_base_baud" with this change.

Additional compatibility string "snps,arc-sdp" is introduced as well
because there're different flavours of AXS boards but they all share the
same motherboard and so it's possible to re-use the same code for
motherbord even if CPU daughterboard changes.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta
2015-02-02 19:23:21 +05:30
parent 556cc1c5f5
commit 8d0d56ba24
3 changed files with 5 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arc/boot/dts/axs101.dts
View File

@@ -13,9 +13,9 @@
/include/ "axs10x_mb.dtsi"
/ {
compatible = "snps,axs101";
compatible = "snps,axs101", "snps,arc-sdp";
chosen {
bootargs = "console=tty0 console=ttyS3,115200n8 consoleblank=0";
bootargs = "earlycon=uart8250,mmio32,0xe0022000,115200n8 console=tty0 console=ttyS3,115200n8 consoleblank=0";
};
};