[PATCH v2 1/3] clk: bcm2835: Don't rate change PLLs on behalf of DSI PLL dividers.
sboyd at codeaurora.org
Fri Jan 20 16:23:44 PST 2017
On 01/18, Eric Anholt wrote:
> Our core PLLs are intended to be configured once and left alone. With
> the SET_RATE_PARENT, asking to set the PLLD_DSI1 clock rate would
> change PLLD just to get closer to the requested DSI clock, thus
> changing PLLD_PER, the UART and ethernet PHY clock rates downstream of
> it, and breaking ethernet.
> We *do* want PLLH to change so that PLLH_AUX can be exactly the value
> we want, though. Thus, we need to have a per-divider policy of
> whether to pass rate changes up.
> Signed-off-by: Eric Anholt <eric at anholt.net>
Applied to clk-next
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