linux-kernel - Re: [PATCH 1/4] phy: rockchip-emmc: give DLL some extra time to be ready

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Message-ID: <2019301.c5hsQIZXPF@phil>
Date:	Fri, 17 Jun 2016 01:35:28 +0200
From:	Heiko Stuebner <heiko@...ech.de>
To:	Brian Norris <briannorris@...omium.org>
Cc:	Kishon Vijay Abraham I <kishon@...com>,
	linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org,
	Doug Anderson <dianders@...omium.org>,
	Shawn Lin <shawn.lin@...k-chips.com>,
	linux-arm-kernel@...ts.infradead.org,
	Brian Norris <computersforpeace@...il.com>
Subject: Re: [PATCH 1/4] phy: rockchip-emmc: give DLL some extra time to be ready

Am Donnerstag, 12. Mai 2016, 15:43:03 schrieb Brian Norris:
> From: Shawn Lin <shawn.lin@...k-chips.com>
> 
> According to the databook, 10.2us is the max time for dll to be ready to
> work. However in testing, some chips need 20us for dll to be ready. This
> patch adds some extra margin for dllrdy to be ready, fixing our
> -ETIMEDOUT issues.
> 
> Signed-off-by: Shawn Lin <shawn.lin@...k-chips.com>
> Signed-off-by: Brian Norris <briannorris@...omium.org>

haven't looked to deep into the emmc-phy block, but on my rk3399-evb board 
the emmc still runs nicely with this patch, so

Tested-by: Heiko Stuebner <heiko@...ech.de>