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clk: sunxi: Support factor clocks with N factor starting not from 0 

commit 9a5e6c7eb5ccbb5f0d3a1dffce135f0a727f40e1 upstream.

The PLLs on newer Allwinner SoC's, such as the A31 and A23, have a
N multiplier factor that starts from 1, not 0.

This patch adds an option to the factor clk driver's config data
structures to specify the base value of N.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chen-Yu Tsai 2014-06-26 23:55:41 +08:00 committed by Greg Kroah-Hartman
parent 28e75102ed
commit 6e6493c26e
2 changed files with 2 additions and 1 deletions
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2
drivers/clk/sunxi/clk-factors.c
View File

@ -70,7 +70,7 @@ static unsigned long clk_factors_recalc_rate(struct clk_hw *hw,
p = FACTOR_GET(config->pshift, config->pwidth, reg);
/* Calculate the rate */
rate = (parent_rate * n * (k + 1) >> p) / (m + 1);
rate = (parent_rate * (n + config->n_start) * (k + 1) >> p) / (m + 1);
return rate;
}

1
drivers/clk/sunxi/clk-factors.h
View File

@ -15,6 +15,7 @@ struct clk_factors_config {
u8 mwidth;
u8 pshift;
u8 pwidth;
u8 n_start;
};
struct clk *clk_register_factors(struct device *dev, const char *name,