Re: [PATCH 5/7] ARM: tegra: timer: Enable timer and rtc clocks
From: Olof Johansson <hidden>
Date: 2011-02-22 05:32:13
Also in:
linux-arm-kernel, lkml
Hi, On Mon, Feb 21, 2011 at 6:39 PM, Colin Cross [off-list ref] wrote:
quoted hunk ↗ jump to hunk
Enable the timer and rtc clocks to prevent them being turned off by the bootloader clock disabling code. Signed-off-by: Colin Cross <redacted> --- arch/arm/mach-tegra/timer.c | 14 ++++++++++++-- 1 files changed, 12 insertions(+), 2 deletions(-)diff --git a/arch/arm/mach-tegra/timer.c b/arch/arm/mach-tegra/timer.c index ffa6a68..31b4f56 100644 --- a/arch/arm/mach-tegra/timer.c +++ b/arch/arm/mach-tegra/timer.c@@ -18,6 +18,7 @@*/ #include <linux/init.h> +#include <linux/err.h> #include <linux/sched.h> #include <linux/time.h> #include <linux/interrupt.h>@@ -193,9 +194,20 @@ static struct irqaction tegra_timer_irq = {static void __init tegra_init_timer(void) { + struct clk *clk; unsigned long rate = clk_measure_input_freq(); int ret; + clk = clk_get_sys("timer", NULL); + BUG_ON(IS_ERR(clk)); + clk_enable(clk); + clk_put(clk); + + clk = clk_get_sys("rtc-tegra", NULL); + BUG_ON(IS_ERR(clk)); + clk_enable(clk); + clk_put(clk);
Why initialize the rtc clock here? Not all boards use it and instead use the rtc on the pmic. Seems wasteful to clock it unless the driver for it is probed and configured. -Olof -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html