[PATCH] ARM: zynq7000: make PS_CLK Kconfigurable

[Sascha Hauer]

Hi ALexander,

On Sun, Mar 12, 2017 at 09:27:00PM +0100, Alexander Kurz wrote:
> The main clock source on Zynq-7000 based boards (PS_CLK) is not uniform
> for all boards, while typical boards are clocked with 33.3MHz, the
> Z-7010 based Digilent Zybo board is clocked with 50MHz.
> Since barebox is not yet OF aware for Zynq, make PS_CLK board dependent
> via Kconfig.

We shouldn't encode differences between boards in Kconfig.

One way around it would be to add platform_data to the clk device and
call zynq_init() (with an additional freq argument) from the board code rather
than directly from an initcall.
Creating a small zynq_set_ps_clk() which sets the clock and is to
be called by the board before the clock driver is initialized would be
simpler but also work.

Sascha

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