Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [PATCH] ARM: imx: clk-vf610: introduce clks_init_on | Date | Tue, 29 Jul 2014 16:44:31 +0200 |
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On Tuesday 29 July 2014 16:20:28 Stefan Agner wrote: > At the end of the boot process, the clock framework might disable > required main PLL's. So far, this was no issue since drivers > requested clocks, which are descended of the main PLL's (e.g. > pll1_pfd1, which provides the system clock). > > To archive the full 500MHz system clock, DDR clock need to be a > descendant of PLL2 rather than PLL1 (DDRC_CLK_SEL set to 0). The > bootloader sets up the clocks accordingly before making use of > DDR at all. However, in Linux, there is no driver using PLL2, > which lead to PLL2 being disabled by the clock framework. > > With this patch, we make sure that the main system clock and the > DDR clock are initially enabled and are kept enabled. > > Signed-off-by: Stefan Agner <stefan@agner.ch> >
Wouldn't it be better to list this in the DT as a default for the respective clocks?
Arnd
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