[PATCH] ARM: imx: clk-vf610: introduce clks_init_on
shawn.guo at freescale.com
Tue Jul 29 19:44:46 PDT 2014
On Tue, Jul 29, 2014 at 04:20:28PM +0200, 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 at agner.ch>
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