From: marc.zyngier@arm.com (Marc Zyngier)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH/RESEND] clocksource/arm_arch_timer: Map frame with of_io_request_and_map()
Date: Wed, 19 Oct 2016 08:48:42 +0100 [thread overview]
Message-ID: <5807255A.8060906@arm.com> (raw)
In-Reply-To: <20161018234514.6175-1-sboyd@codeaurora.org>
On 19/10/16 00:45, Stephen Boyd wrote:
> Let's use the of_io_request_and_map() API so that the frame
> region is protected and shows up in /proc/iomem.
>
> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
> ---
> drivers/clocksource/arm_arch_timer.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
> index 73c487da6d2a..cbfa3bc5be75 100644
> --- a/drivers/clocksource/arm_arch_timer.c
> +++ b/drivers/clocksource/arm_arch_timer.c
> @@ -964,7 +964,8 @@ static int __init arch_timer_mem_init(struct device_node *np)
> }
>
> ret= -ENXIO;
> - base = arch_counter_base = of_iomap(best_frame, 0);
> + base = arch_counter_base = of_io_request_and_map(best_frame, 0,
> + "arch_mem_timer");
> if (!base) {
> pr_err("arch_timer: Can't map frame's registers\n");
> goto out;
>
Careful here: of_io_request_and_map() returns an ERR_PTR() on failure,
while of_iomap just returns NULL. You want to change the error handling
if you're going down that road.
Thanks,
M.
--
Jazz is not dead. It just smells funny...
WARNING: multiple messages have this Message-ID (diff)
From: Marc Zyngier <marc.zyngier@arm.com>
To: Stephen Boyd <sboyd@codeaurora.org>, Mark Rutland <mark.rutland@arm.com>
Cc: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Thomas Gleixner <tglx@linutronix.de>,
Daniel Lezcano <daniel.lezcano@linaro.org>
Subject: Re: [PATCH/RESEND] clocksource/arm_arch_timer: Map frame with of_io_request_and_map()
Date: Wed, 19 Oct 2016 08:48:42 +0100 [thread overview]
Message-ID: <5807255A.8060906@arm.com> (raw)
In-Reply-To: <20161018234514.6175-1-sboyd@codeaurora.org>
On 19/10/16 00:45, Stephen Boyd wrote:
> Let's use the of_io_request_and_map() API so that the frame
> region is protected and shows up in /proc/iomem.
>
> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
> ---
> drivers/clocksource/arm_arch_timer.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
> index 73c487da6d2a..cbfa3bc5be75 100644
> --- a/drivers/clocksource/arm_arch_timer.c
> +++ b/drivers/clocksource/arm_arch_timer.c
> @@ -964,7 +964,8 @@ static int __init arch_timer_mem_init(struct device_node *np)
> }
>
> ret= -ENXIO;
> - base = arch_counter_base = of_iomap(best_frame, 0);
> + base = arch_counter_base = of_io_request_and_map(best_frame, 0,
> + "arch_mem_timer");
> if (!base) {
> pr_err("arch_timer: Can't map frame's registers\n");
> goto out;
>
Careful here: of_io_request_and_map() returns an ERR_PTR() on failure,
while of_iomap just returns NULL. You want to change the error handling
if you're going down that road.
Thanks,
M.
--
Jazz is not dead. It just smells funny...
next prev parent reply other threads:[~2016-10-19 7:48 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-18 23:45 [PATCH/RESEND] clocksource/arm_arch_timer: Map frame with of_io_request_and_map() Stephen Boyd
2016-10-18 23:45 ` Stephen Boyd
2016-10-19 7:48 ` Marc Zyngier [this message]
2016-10-19 7:48 ` Marc Zyngier
2016-10-19 17:37 ` Stephen Boyd
2016-10-19 17:37 ` Stephen Boyd
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