[U-Boot] [PATCH 5/6] x86: tsc: Correct Silvermont reference clock values

Simon Glass sjg at chromium.org
Tue Aug 1 09:11:24 UTC 2017


On 25 July 2017 at 21:12, Bin Meng <bmeng.cn at gmail.com> wrote:
> Atom processors use a 19.2 MHz crystal oscillator.
>
> Early processors generate 100 MHz via 19.2 MHz * 26 / 5 = 99.84 MHz.
>
> Later processors generate 100 MHz via 19.2 MHz * 125 / 24 = 100 MHz.
>
> Update the Silvermont-based tables accordingly, matching the Software
> Developers Manual.
>
> Also, correct a 166 MHz entry that should have been 116 MHz, and add
> a missing 80 MHz entry for VLV2.
>
> This keeps in sync with Linux kernel commit:
>   05680e7: x86/tsc_msr: Correct Silvermont reference clock values
>
> Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
> ---
>
>  drivers/timer/tsc_timer.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>

Reviewed-by: Simon Glass <sjg at chromium.org>


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