[PATCH 2/2 v2] ARM: OMAP1: recalculate loops per jiffy after dpll1 reprogram
From: Janusz Krzysztofik <hidden>
Date: 2011-12-01 20:14:33
Also in:
linux-omap, lkml
Subsystem:
arm port, omap clock framework support, omap1 support, the rest · Maintainers:
Russell King, Paul Walmsley, Aaro Koskinen, Janusz Krzysztofik, Linus Torvalds
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 <redacted> --- 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