[PATCH 3/4] mx25: fix time accounting

Baruch Siach baruch at tkos.co.il
Mon Jan 25 05:58:21 EST 2010


The gpt_clk rate function doesn't consider the PER divider. This causes a
significant drift in time accounting. Fix this by introducing the correct rate
calculation function.

Signed-off-by: Baruch Siach <baruch at tkos.co.il>
---
 arch/arm/mach-mx25/clock.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-mx25/clock.c b/arch/arm/mach-mx25/clock.c
index 08aaa38..c003ac4 100644
--- a/arch/arm/mach-mx25/clock.c
+++ b/arch/arm/mach-mx25/clock.c
@@ -119,6 +119,11 @@ static unsigned long get_rate_nfc(struct clk *clk)
 	return get_rate_per(8);
 }
 
+static unsigned long get_rate_gpt(struct clk *clk)
+{
+	return get_rate_per(5);
+}
+
 static unsigned long get_rate_otg(struct clk *clk)
 {
 	return 48000000; /* FIXME */
@@ -156,7 +161,7 @@ static void clk_cgcr_disable(struct clk *clk)
 		.secondary	= s,			\
 	}
 
-DEFINE_CLOCK(gpt_clk,    0, CCM_CGCR0,  5, get_rate_ipg, NULL, NULL);
+DEFINE_CLOCK(gpt_clk,    0, CCM_CGCR0,  5, get_rate_gpt, NULL, NULL);
 DEFINE_CLOCK(uart_per_clk, 0, CCM_CGCR0, 15, get_rate_uart, NULL, NULL);
 DEFINE_CLOCK(cspi1_clk,  0, CCM_CGCR1,  5, get_rate_ipg, NULL, NULL);
 DEFINE_CLOCK(cspi2_clk,  0, CCM_CGCR1,  6, get_rate_ipg, NULL, NULL);
-- 
1.6.5




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