OMAP2+: clock: disable autoidle on all clocks during clock init

Disable autoidle on all clocks during clock framework initialization.
(If CONFIG_PM is set, autoidle is re-enabled for all clocks later in
the boot process.)

The principle behind this patch, and some similar patches, is that the
kernel should start with all power management features disabled.
Later in the boot process, the PM code, if compiled in with CONFIG_PM,
enables or re-enables power management features.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Rajendra Nayak <rnayak@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/clock2420_data.c b/arch/arm/mach-omap2/clock2420_data.c
index 0a992bc8d0d..ee73e14ac3c 100644
--- a/arch/arm/mach-omap2/clock2420_data.c
+++ b/arch/arm/mach-omap2/clock2420_data.c
@@ -1913,6 +1913,9 @@ int __init omap2420_clk_init(void)
                 omap2_init_clk_clkdm(c->lk.clk);
         }
 
+        /* Disable autoidle on all clocks; let the PM code enable it later */
+        omap_clk_disable_autoidle_all();
+
         /* Check the MPU rate set by bootloader */
         clkrate = omap2xxx_clk_get_core_rate(&dpll_ck);
         for (prcm = rate_table; prcm->mpu_speed; prcm++) {