From: Sascha Hauer <s.hauer@pengutronix.de>
To: Ahmad Fatoum <a.fatoum@pengutronix.de>
Cc: barebox@lists.infradead.org, Michael Grzeschik <mgr@pengutronix.de>
Subject: Re: [PATCH] ARM: at91: support sama5 low level clock setup with oscillator
Date: Tue, 29 Sep 2020 09:01:24 +0200 [thread overview]
Message-ID: <20200929070124.GR11648@pengutronix.de> (raw)
In-Reply-To: <20200928100809.25868-1-a.fatoum@pengutronix.de>
On Mon, Sep 28, 2020 at 12:08:09PM +0200, Ahmad Fatoum wrote:
> AT91Bootstrap has a CONFIG_MCK_BYPASS option with following help text:
>
> "Use external 8 to 24 Mhz clock signal as source of main clock
> instead of an external crystal oscillator.
> This option disables the internal driving on the XOUT pin.
> The external source has to provide a stable clock on the XIN pin.
> If this option is disabled, the SoC expects a crystal oscillator
> that needs driving on both XIN and XOUT lines."
>
> When the low level clock setup was ported over from AT91Bootstrap,
> this config option was dropped. It wasn't necessary for the xplained
> boards that have a crystal, but for ones with an oscillator, it's
> required. Add the bit flag back.
>
> Suggested-by: Michael Grzeschik <mgr@pengutronix.de>
> Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
> ---
> arch/arm/mach-at91/at91_pmc_ll.c | 2 ++
> arch/arm/mach-at91/include/mach/at91_pmc_ll.h | 5 +++++
> 2 files changed, 7 insertions(+)
Applied, thanks
Sascha
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prev parent reply other threads:[~2020-09-29 7:01 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-28 10:08 Ahmad Fatoum
2020-09-29 7:01 ` Sascha Hauer [this message]
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