diff options
| author | Colin Cross <ccross@android.com> | 2010-11-03 16:32:15 -0700 |
|---|---|---|
| committer | Colin Cross <ccross@android.com> | 2010-11-03 17:55:55 -0700 |
| commit | c41283c28bf8296cfe27f843a7fa287b4d2ab9dd (patch) | |
| tree | 1845975838b960ab9083c765482966bed04543d2 /arch/arm/mach-tegra/tegra2_clocks.c | |
| parent | 34661b64da75b9990bcbee61203ea2fb76669625 (diff) | |
ARM: tegra: clock: Add a pass-through set_rate to super clocks
Change-Id: I55027c93415a59cbf701b1f30e436203316c0d61
Signed-off-by: Colin Cross <ccross@android.com>
Diffstat (limited to 'arch/arm/mach-tegra/tegra2_clocks.c')
| -rw-r--r-- | arch/arm/mach-tegra/tegra2_clocks.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/tegra2_clocks.c b/arch/arm/mach-tegra/tegra2_clocks.c index 8bc46e7e0988..2c667fab39ab 100644 --- a/arch/arm/mach-tegra/tegra2_clocks.c +++ b/arch/arm/mach-tegra/tegra2_clocks.c @@ -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 */ |