[PATCH] clk: tegra: Don't enable PLLs during early boot

From: Peter De Schrijver
Date: Fri Mar 22 2013 - 08:06:57 EST


The PLL code relies on udelay() which is not available when CCF is
initialized. Hence we can't enable any PLL during this phase.

Signed-off-by: Peter De Schrijver <pdeschrijver@xxxxxxxxxx>

--

Stephen,

Can you confirm this is ok for the audio drivers?

We used to be lucky that this has worked up to now, but I will introduce some
changes to the pll lock check code which cause this to fail due to the
slight differences in timing.

---
drivers/clk/tegra/clk-tegra20.c | 4 ++--
drivers/clk/tegra/clk-tegra30.c | 8 ++++----
2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/tegra/clk-tegra20.c b/drivers/clk/tegra/clk-tegra20.c
index b92d48b..7cc76b0 100644
--- a/drivers/clk/tegra/clk-tegra20.c
+++ b/drivers/clk/tegra/clk-tegra20.c
@@ -1230,8 +1230,8 @@ static __initdata struct tegra_clk_init_table init_table[] = {
{usbd, clk_max, 12000000, 0},
{usb2, clk_max, 12000000, 0},
{usb3, clk_max, 12000000, 0},
- {pll_a, clk_max, 56448000, 1},
- {pll_a_out0, clk_max, 11289600, 1},
+ {pll_a, clk_max, 56448000, 0},
+ {pll_a_out0, clk_max, 11289600, 0},
{cdev1, clk_max, 0, 1},
{blink, clk_max, 32768, 1},
{i2s1, pll_a_out0, 11289600, 0},
diff --git a/drivers/clk/tegra/clk-tegra30.c b/drivers/clk/tegra/clk-tegra30.c
index ba6f51b..b705408 100644
--- a/drivers/clk/tegra/clk-tegra30.c
+++ b/drivers/clk/tegra/clk-tegra30.c
@@ -1882,11 +1882,11 @@ static __initdata struct tegra_clk_init_table init_table[] = {
{uartc, pll_p, 408000000, 0},
{uartd, pll_p, 408000000, 0},
{uarte, pll_p, 408000000, 0},
- {pll_a, clk_max, 564480000, 1},
- {pll_a_out0, clk_max, 11289600, 1},
- {extern1, pll_a_out0, 0, 1},
+ {pll_a, clk_max, 564480000, 0},
+ {pll_a_out0, clk_max, 11289600, 0},
+ {extern1, pll_a_out0, 0, 0},
{clk_out_1_mux, extern1, 0, 0},
- {clk_out_1, clk_max, 0, 1},
+ {clk_out_1, clk_max, 0, 0},
{blink, clk_max, 0, 1},
{i2s0, pll_a_out0, 11289600, 0},
{i2s1, pll_a_out0, 11289600, 0},
--
1.7.7.rc0.72.g4b5ea.dirty

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