From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] clocksource: dw_apb_timer_of: support timer-based delay
Date: Mon, 02 Nov 2015 22:49:01 +0100 [thread overview]
Message-ID: <4138087.gESYTxjr8X@wuerfel> (raw)
In-Reply-To: <56372366.6090905@linaro.org>
On Monday 02 November 2015 09:48:38 Daniel Lezcano wrote:
> If I follow the logic of arch_arm_timer is better than dw_apb timer.
>
> 1. The arch_arm_timer is present
>
> => dw_apb timer is not used at all
>
> CONFIG_ARM_ARCH_TIMER=y
> # CONFIG_DW_APB_TIMER is not set
>
> 2. The arch_arm_timer is *not* present
>
> => dw_apb_timer is used with delay code
>
> # CONFIG_ARM_ARCH_TIMER is not set
> CONFIG_DW_APB_TIMER=y
>
> In both cases, DW_APB_TIMER_BASED_DELAY is not needed.
>
This still has the same problem that running a multi_v7_defconfig
kernel or a binary distro kernel will always enable both. We really
want to have a good run-time decision, not compile-time.
Arnd
next prev parent reply other threads:[~2015-11-02 21:49 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-30 8:27 [PATCH] clocksource: dw_apb_timer_of: support timer-based delay Jisheng Zhang
2015-10-30 10:14 ` Jisheng Zhang
2015-10-30 10:44 ` Daniel Lezcano
2015-10-30 11:09 ` Jisheng Zhang
2015-10-30 12:37 ` Daniel Lezcano
2015-11-02 2:51 ` Jisheng Zhang
2015-11-02 8:48 ` Daniel Lezcano
2015-11-02 13:33 ` Jisheng Zhang
2015-11-02 21:49 ` Arnd Bergmann [this message]
2015-10-30 12:42 ` Arnd Bergmann
2015-11-02 3:03 ` Jisheng Zhang
2015-11-02 21:56 ` Arnd Bergmann
2015-11-03 6:59 ` Jisheng Zhang
2015-11-03 8:49 ` Arnd Bergmann
2015-11-03 9:45 ` Jisheng Zhang
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