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ARM: tegra: clock: Add a pass-through set_rate to super clocks

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Change-Id: I55027c93415a59cbf701b1f30e436203316c0d61
Signed-off-by: Colin Cross <ccross@android.com>
This commit is contained in:
Colin Cross
2010-11-03 16:32:15 -07:00
parent 34661b64da
commit c41283c28b
1 changed files with 13 additions and 0 deletions
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13
arch/arm/mach-tegra/tegra2_clocks.c
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@@ -351,11 +351,24 @@ static int tegra2_super_clk_set_parent(struct clk *c, struct clk *p)
return -EINVAL;
}
/*
* Super clocks have "clock skippers" instead of dividers. Dividing using
* a clock skipper does not allow the voltage to be scaled down, so instead
* adjust the rate of the parent clock. This requires that the parent of a
* super clock have no other children, otherwise the rate will change
* underneath the other children.
*/
static int tegra2_super_clk_set_rate(struct clk *c, unsigned long rate)
{
return clk_set_rate(c->parent, rate);
}
static struct clk_ops tegra_super_ops = {
.init = tegra2_super_clk_init,
.enable = tegra2_super_clk_enable,
.disable = tegra2_super_clk_disable,
.set_parent = tegra2_super_clk_set_parent,
.set_rate = tegra2_super_clk_set_rate,
};
/* virtual cpu clock functions */