Re: [U-Boot] [PATCH 1/6] x86: tsc: Read all ratio bits from MSR_PLATFORM_INFO

On Tue, Aug 1, 2017 at 5:10 PM, Simon Glass sjg@chromium.org wrote:

On 25 July 2017 at 21:12, Bin Meng bmeng.cn@gmail.com wrote:

...

Currently we read the tsc radio like this:

    ratio = (MSR_PLATFORM_INFO >> 8) & 0x1f;

Thus we get bit 8-12 of MSR_PLATFORM_INFO, however according to the Intel manual, the ratio bits are bit 8-15.

Fix this problem by masking 0xff instead.

This keeps in sync with Linux kernel commit: 886123f: x86/tsc: Read all ratio bits from MSR_PLATFORM_INFO

Signed-off-by: Bin Meng bmeng.cn@gmail.com

drivers/timer/tsc_timer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Simon Glass sjg@chromium.org

applied to u-boot-x86, thanks!