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[PATCH] No need to write c0_compare in plat_timer_setup

To: linux-mips@linux-mips.org
Subject: [PATCH] No need to write c0_compare in plat_timer_setup
From: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Date: Thu, 01 Mar 2007 01:53:13 +0900 (JST)
Cc: ralf@linux-mips.org
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
If R4k counter was used for hpt_timer and interrupt source,
c0_hpt_timer_init() initializes the c0_compare register.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
---
 arch/mips/lasat/setup.c                |    1 -
 arch/mips/mips-boards/generic/time.c   |    3 ---
 arch/mips/mips-boards/sim/sim_time.c   |    3 ---
 arch/mips/tx4927/common/tx4927_setup.c |   10 ----------
 arch/mips/tx4938/common/setup.c        |    9 ---------
 5 files changed, 26 deletions(-)

diff --git a/arch/mips/lasat/setup.c b/arch/mips/lasat/setup.c
index 14c5516..b27b47c 100644
--- a/arch/mips/lasat/setup.c
+++ b/arch/mips/lasat/setup.c
@@ -116,7 +116,6 @@ static void lasat_time_init(void)
 
 void __init plat_timer_setup(struct irqaction *irq)
 {
-       write_c0_compare( read_c0_count() + mips_hpt_frequency / HZ);
        change_c0_status(ST0_IM, IE_IRQ0 | IE_IRQ5);
 }
 
diff --git a/arch/mips/mips-boards/generic/time.c 
b/arch/mips/mips-boards/generic/time.c
index a3c3a1d..df2a2bd 100644
--- a/arch/mips/mips-boards/generic/time.c
+++ b/arch/mips/mips-boards/generic/time.c
@@ -295,7 +295,4 @@ void __init plat_timer_setup(struct irqa
        irq_desc[mips_cpu_timer_irq].status |= IRQ_PER_CPU;
        set_irq_handler(mips_cpu_timer_irq, handle_percpu_irq);
 #endif
-
-        /* to generate the first timer interrupt */
-       write_c0_compare (read_c0_count() + mips_hpt_frequency/HZ);
 }
diff --git a/arch/mips/mips-boards/sim/sim_time.c 
b/arch/mips/mips-boards/sim/sim_time.c
index 30711d0..d3a21c7 100644
--- a/arch/mips/mips-boards/sim/sim_time.c
+++ b/arch/mips/mips-boards/sim/sim_time.c
@@ -199,7 +199,4 @@ void __init plat_timer_setup(struct irqa
        irq_desc[mips_cpu_timer_irq].flags |= IRQ_PER_CPU;
        set_irq_handler(mips_cpu_timer_irq, handle_percpu_irq);
 #endif
-
-       /* to generate the first timer interrupt */
-       write_c0_compare(read_c0_count() + (mips_hpt_frequency/HZ));
 }
diff --git a/arch/mips/tx4927/common/tx4927_setup.c 
b/arch/mips/tx4927/common/tx4927_setup.c
index 941c441..c8e49fe 100644
--- a/arch/mips/tx4927/common/tx4927_setup.c
+++ b/arch/mips/tx4927/common/tx4927_setup.c
@@ -81,18 +81,8 @@ void __init tx4927_time_init(void)
 
 void __init plat_timer_setup(struct irqaction *irq)
 {
-       u32 count;
-       u32 c1;
-       u32 c2;
-
        setup_irq(TX4927_IRQ_CPU_TIMER, irq);
 
-       /* to generate the first timer interrupt */
-       c1 = read_c0_count();
-       count = c1 + (mips_hpt_frequency / HZ);
-       write_c0_compare(count);
-       c2 = read_c0_count();
-
 #ifdef CONFIG_TOSHIBA_RBTX4927
        {
                extern void toshiba_rbtx4927_timer_setup(struct irqaction
diff --git a/arch/mips/tx4938/common/setup.c b/arch/mips/tx4938/common/setup.c
index dc87d92..142abf4 100644
--- a/arch/mips/tx4938/common/setup.c
+++ b/arch/mips/tx4938/common/setup.c
@@ -55,14 +55,5 @@ tx4938_time_init(void)
 
 void __init plat_timer_setup(struct irqaction *irq)
 {
-       u32 count;
-       u32 c1;
-       u32 c2;
-
        setup_irq(TX4938_IRQ_CPU_TIMER, irq);
-
-       c1 = read_c0_count();
-       count = c1 + (mips_hpt_frequency / HZ);
-       write_c0_compare(count);
-       c2 = read_c0_count();
 }

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