From: Rajendra Nayak <rnayak@xxxxxx>
OMAP3: Enable and autoidle DPLL5 at boot
Enable DPLL5 at bootup and put it into auto-idle.
This is required for the USBHOST 120MHz f-clock and USBTLL f-clock
to work.
Signed-off-by: Rajendra Nayak <rnayak@xxxxxx>
Signed-off-by: Anand Gadiyar <gadiyar@xxxxxx>
---
arch/arm/mach-omap2/clock34xx.c | 25 +++++++++++++++++++++++++
1 files changed, 25 insertions(+)
Index: linux-omap-2.6/arch/arm/mach-omap2/clock34xx.c
===================================================================
--- linux-omap-2.6.orig/arch/arm/mach-omap2/clock34xx.c
+++ linux-omap-2.6/arch/arm/mach-omap2/clock34xx.c
@@ -1056,6 +1056,25 @@ void omap2_clk_prepare_for_reboot(void)
#endif
}
+static void omap3_lock_dpll5(void)
+{
+ struct clk *dpll5_clk;
+ struct clk *dpll5_m2_clk;
+
+ dpll5_clk = clk_get(NULL, "dpll5_ck");
+ clk_set_rate(dpll5_clk, 120000000);
+ clk_enable(dpll5_clk);
+
+ /* Enable autoidle to allow it to enter low power bypass */
+ omap3_dpll_allow_idle(dpll5_clk);
+
+ /* Program dpll5_m2_clk divider for no division */
+ dpll5_m2_clk = clk_get(NULL, "dpll5_m2_ck");
+ clk_enable(dpll5_m2_clk);
+ clk_set_rate(dpll5_m2_clk, 120000000);
+ return;
+}
+
/* REVISIT: Move this init stuff out into clock.c */
/*
@@ -1148,6 +1167,12 @@ int __init omap2_clk_init(void)
*/
clk_enable_init_clocks();
+ /*
+ * Lock DPLL5 and put it in autoidle.
+ */
+ if (omap_rev() >= OMAP3430_REV_ES2_0)
+ omap3_lock_dpll5();
+
/* Avoid sleeping during omap2_clk_prepare_for_reboot() */
/* REVISIT: not yet ready for 343x */
#if 0
--
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