From: Boris BREZILLON <b.brezillon@overkiz.com>
Date: Fri, 11 Oct 2013 08:51:23 +0000 (+0200)
Subject: clk: at91: add PMC master clock
X-Git-Tag: cleanup-for-linus~17^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e442d234405ad75e2d3d2baf15b364ee2c3573c9;p=pandora-kernel.git

clk: at91: add PMC master clock

This patch adds new at91 master clock implementation using common clk
framework.

The master clock layout describe the MCKR register layout.
There are 2 master clock layouts:
- at91rm9200
- at91sam9x5

Master clocks are given characteristics:
- min/max clock output rate

These characteristics are checked during rate change to avoid
over/underclocking.

These characteristics are described in atmel's SoC datasheet in
"Electrical Characteristics" paragraph.

Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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