tegra: Add a delay in clock_start_periph_pll()

This function enables a peripheral clock and then immediately sets its
divider. Add a delay to allow the clock to settle first. This matches the
delay in other places which do a similar thing.

Without this, the I2S device on Nyan does not init properly.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

diff --git a/arch/arm/mach-tegra/clock.c b/arch/arm/mach-tegra/clock.c
index 096330748f2ba98955eb28d94cd2351362f022f2..dc5f16b41b60fa03737829751316a7dc7858b101 100644 (file)
--- a/arch/arm/mach-tegra/clock.c
+++ b/arch/arm/mach-tegra/clock.c
@@ -477,6 +477,7 @@ unsigned clock_start_periph_pll(enum periph_id periph_id,
 
        reset_set_enable(periph_id, 1);
        clock_enable(periph_id);
+       udelay(2);
 
        effective_rate = clock_adjust_periph_pll_div(periph_id, parent, rate,
                                                 NULL);