From: York Sun <yorksun@freescale.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v3] kmp204x: reset the Zarlink clocking chips at power up only
Date: Wed, 20 Aug 2014 12:41:24 -0700 [thread overview]
Message-ID: <53F4F9E4.5030507@freescale.com> (raw)
In-Reply-To: <1408455604-11008-1-git-send-email-valentin.longchamp@keymile.com>
On 08/19/2014 06:40 AM, Valentin Longchamp wrote:
> There is the requirement on the chassis's backplane that when the clocks
> have been enabled, they then should not disappear.
>
> Resetting the Zarlink clocking chips at unit reset violates this
> requirement because the backplane clocks are not supplied during the
> reset time.
>
> To avoid this side effect, both the Zarlink clocking chips are reset
> only at power up.
>
> Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
>
> ---
>
> Changes in v3:
> - fix the commentaries that also had to be changed
>
Applied to u-boot-mpc85xx master branch, awaiting for upstream.
York
prev parent reply other threads:[~2014-08-20 19:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-17 12:22 [U-Boot] [PATCH] kmp204x: set the ZL clk chips reset to power up only Valentin Longchamp
2014-08-12 17:54 ` York Sun
2014-08-13 6:15 ` Valentin Longchamp
2014-08-13 8:17 ` [U-Boot] [PATCH v2] kmp204x: reset the Zarlink clocking chips at " Valentin Longchamp
2014-08-13 16:51 ` York Sun
2014-08-19 13:33 ` Valentin Longchamp
2014-08-19 13:40 ` [U-Boot] [PATCH v3] " Valentin Longchamp
2014-08-20 19:41 ` York Sun [this message]
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