[PATCH 2/2 v2] ARM: OMAP1: recalculate loops per jiffy after dpll1 reprogram

From: Janusz Krzysztofik
Date: Thu Dec 01 2011 - 15:14:34 EST


Otherwise timing is inaccurate, resulting in devices which depend on it,
like omap-keypad, broken.

Created and tested on top of linux-omap/fixes on Amstrad Delta.

Signed-off-by: Janusz Krzysztofik <jkrzyszt@xxxxxxxxxxxx>
---
v2 changes:
* was 5/5 v2, rebased on 1/2.

arch/arm/mach-omap1/clock_data.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-omap1/clock_data.c b/arch/arm/mach-omap1/clock_data.c
index b001299..0ef1e7d 100644
--- a/arch/arm/mach-omap1/clock_data.c
+++ b/arch/arm/mach-omap1/clock_data.c
@@ -16,6 +16,8 @@

#include <linux/kernel.h>
#include <linux/clk.h>
+#include <linux/cpufreq.h>
+#include <linux/delay.h>
#include <linux/io.h>

#include <asm/mach-types.h> /* for machine_is_* */
@@ -927,7 +929,9 @@ int __init omap1_clk_init(void)

void __init omap1_clk_late_init(void)
{
- if (ck_dpll1.rate >= OMAP1_DPLL1_SANE_VALUE)
+ unsigned long rate = ck_dpll1.rate;
+
+ if (rate >= OMAP1_DPLL1_SANE_VALUE)
return;

/* Find the highest supported frequency and enable it */
@@ -939,4 +943,5 @@ void __init omap1_clk_late_init(void)
}
propagate_rate(&ck_dpll1);
omap1_show_rates();
+ loops_per_jiffy = cpufreq_scale(loops_per_jiffy, rate, ck_dpll1.rate);
}
--
1.7.3.4

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