From: Maxime Ripard <maxime.ripard@free-electrons.com>
To: John Stultz <john.stultz@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Emilio Lopez <emilio@elopez.com.ar>,
kevin@allwinnertech.com, sunny@allwinnertech.com,
shuge@allwinnertech.com, linux-sunxi@googlegroups.com,
Maxime Ripard <maxime.ripard@free-electrons.com>
Subject: [PATCH 6/8] clocksource: sun4i: Remove TIMER_SCAL variable
Date: Wed, 26 Jun 2013 23:16:59 +0200 [thread overview]
Message-ID: <1372281421-2099-7-git-send-email-maxime.ripard@free-electrons.com> (raw)
In-Reply-To: <1372281421-2099-1-git-send-email-maxime.ripard@free-electrons.com>
The prescaler is only used when using the internal low frequency
oscillator (at 32kHz). Since we're using the higher frequency oscillator
at 24MHz, we can just remove it.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---
drivers/clocksource/sun4i_timer.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/drivers/clocksource/sun4i_timer.c b/drivers/clocksource/sun4i_timer.c
index 7f3b248..912d3e0 100644
--- a/drivers/clocksource/sun4i_timer.c
+++ b/drivers/clocksource/sun4i_timer.c
@@ -36,7 +36,6 @@
#define TIMER_INTVAL_REG(val) (0x10 * val + 0x14)
#define TIMER_CNTVAL_REG(val) (0x10 * val + 0x18)
-#define TIMER_SCAL 16
#define TIMER_CNT64_CTL_REG 0xa0
#define TIMER_CNT64_CTL_CLR BIT(0)
#define TIMER_CNT64_CTL_RL BIT(1)
@@ -141,7 +140,6 @@ static cycle_t sun4i_timer_clksrc_read(struct clocksource *c)
static void __init sun4i_timer_init(struct device_node *node)
{
- unsigned long rate = 0;
struct clk *clk;
int ret, irq;
u32 val;
@@ -159,15 +157,13 @@ static void __init sun4i_timer_init(struct device_node *node)
panic("Can't get timer clock");
clk_prepare_enable(clk);
- rate = clk_get_rate(clk);
-
writel(TIMER_CNT64_CTL_CLR, timer_base + TIMER_CNT64_CTL_REG);
setup_sched_clock(sun4i_timer_sched_read, 32, clk_get_rate(clk));
clocksource_mmio_init(timer_base + TIMER_CNT64_LOW_REG, node->name,
clk_get_rate(clk), 300, 32,
sun4i_timer_clksrc_read);
- writel(rate / (TIMER_SCAL * HZ),
+ writel(clk_get_rate(clk) / HZ,
timer_base + TIMER_INTVAL_REG(0));
/* set clock source to HOSC, 16 pre-division */
@@ -191,8 +187,8 @@ static void __init sun4i_timer_init(struct device_node *node)
sun4i_clockevent.cpumask = cpumask_of(0);
- clockevents_config_and_register(&sun4i_clockevent, rate / TIMER_SCAL,
- 0x1, 0xff);
+ clockevents_config_and_register(&sun4i_clockevent, clk_get_rate(clk),
+ 0x1, 0xffffffff);
}
CLOCKSOURCE_OF_DECLARE(sun4i, "allwinner,sun4i-timer",
sun4i_timer_init);
--
1.8.3.1
next prev parent reply other threads:[~2013-06-26 21:18 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-26 21:16 [PATCH 0/8] clocksource: sunxi: Timer fixes and cleanup Maxime Ripard
2013-06-26 21:16 ` [PATCH 1/8] clocksource: sun4i: Use the BIT macros where possible Maxime Ripard
2013-06-26 21:16 ` [PATCH 2/8] clocksource: sun4i: Add clocksource and sched clock drivers Maxime Ripard
2013-06-26 21:27 ` Daniel Lezcano
2013-06-27 9:31 ` Maxime Ripard
2013-06-27 6:02 ` Baruch Siach
2013-06-27 9:35 ` Maxime Ripard
2013-06-27 9:46 ` Baruch Siach
2013-06-27 17:21 ` Maxime Ripard
2013-06-27 17:36 ` Baruch Siach
2013-06-27 19:16 ` Maxime Ripard
2013-06-27 10:17 ` [linux-sunxi] " Siarhei Siamashka
2013-06-27 17:02 ` Maxime Ripard
2013-06-27 19:51 ` Siarhei Siamashka
2013-06-28 10:19 ` Maxime Ripard
2013-06-26 21:16 ` [PATCH 3/8] clocksource: sun4i: Don't forget to enable the clock we use Maxime Ripard
2013-06-26 21:16 ` [PATCH 4/8] clocksource: sun4i: Fix the next event code Maxime Ripard
2013-06-26 21:16 ` [PATCH 5/8] clocksource: sun4i: Factor out some timer code Maxime Ripard
2013-06-26 21:16 ` Maxime Ripard [this message]
2013-06-26 21:17 ` [PATCH 7/8] clocksource: sun4i: Cleanup parent clock setup Maxime Ripard
2013-06-26 21:17 ` [PATCH 8/8] clocksource: sun4i: Fix bug when switching from periodic to oneshot modes Maxime Ripard
2013-06-27 9:27 ` [linux-sunxi] [PATCH 0/8] clocksource: sunxi: Timer fixes and cleanup Hans de Goede
2013-06-27 9:43 ` Maxime Ripard
2013-06-27 9:54 ` Hans de Goede
2013-06-27 16:54 ` Maxime Ripard
2013-06-27 18:13 ` Hans de Goede
2013-06-28 10:41 ` Maxime Ripard
2013-06-27 20:26 ` Siarhei Siamashka
2013-06-28 8:17 ` Hans de Goede
[not found] ` <2013062809433715678058@allwinnertech.com>
[not found] ` <20130628124843.242df804@i7>
2013-06-28 10:26 ` Thomas Gleixner
2013-06-28 11:14 ` Siarhei Siamashka
2013-06-28 14:02 ` Thomas Gleixner
2013-06-28 17:03 ` maxime.ripard
[not found] ` <20130628132912.014b2f5b@i7>
2013-06-28 14:16 ` maxime.ripard
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