tree 4bf997affe156ab4757df57f031ad500a0278b47
parent 9b9ca5b7b5f225fe5033749697655990dbfdef78
author Bin Meng <bmeng.cn@gmail.com> 1551174739 -0800
committer Bin Meng <bmeng.cn@gmail.com> 1552316101 +0800

x86: Make sure i8254 is setup correctly before generating beeps

The i8254 timer control IO port (0x43) should be setup correctly
by using PIT counter 2 to generate beeps, however in U-Boot other
codes like TSC driver utilizes PIT for TSC frequency calibration
and configures the counter 2 to a different mode that does not
beep. Fix this by always ensuring the PIT counter 2 is correctly
initialized so that the i8254 beeper driver works as expected.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>