From: Stephen Boyd <sboyd@codeaurora.org>
To: Shawn Lin <shawn.lin@rock-chips.com>
Cc: Michael Turquette <mturquette@baylibre.com>,
Heiko Stuebner <heiko@sntech.de>,
linux-clk@vger.kernel.org, linux-rockchip@lists.infradead.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v3] clk: rockchip: reset init state before mmc card initialization
Date: Thu, 1 Oct 2015 16:37:01 -0700 [thread overview]
Message-ID: <20151001233701.GY19319@codeaurora.org> (raw)
In-Reply-To: <1441325733-4131-1-git-send-email-shawn.lin@rock-chips.com>
On 09/04, Shawn Lin wrote:
> mmc host controller's IO input/output timing is unpredictable if
> bootloader execute tuning for HS200 mode. It might make kernel failed
> to initialize mmc card in identification mode. The root cause is
> tuning phase and degree setting for HS200 mode in bootloader aren't
> applicable to that of identification mode in kernel stage. Anyway, we
> can't force all bootloaders to reset tuning phase and degree setting
> before into kernel. Simply reset it in rockchip_clk_register_mmc.
>
> Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
>
> Reviewed-by: Heiko Stuebner <heiko@sntech.de>
> ---
Applied to clk-next
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
WARNING: multiple messages have this Message-ID (diff)
From: sboyd@codeaurora.org (Stephen Boyd)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3] clk: rockchip: reset init state before mmc card initialization
Date: Thu, 1 Oct 2015 16:37:01 -0700 [thread overview]
Message-ID: <20151001233701.GY19319@codeaurora.org> (raw)
In-Reply-To: <1441325733-4131-1-git-send-email-shawn.lin@rock-chips.com>
On 09/04, Shawn Lin wrote:
> mmc host controller's IO input/output timing is unpredictable if
> bootloader execute tuning for HS200 mode. It might make kernel failed
> to initialize mmc card in identification mode. The root cause is
> tuning phase and degree setting for HS200 mode in bootloader aren't
> applicable to that of identification mode in kernel stage. Anyway, we
> can't force all bootloaders to reset tuning phase and degree setting
> before into kernel. Simply reset it in rockchip_clk_register_mmc.
>
> Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
>
> Reviewed-by: Heiko Stuebner <heiko@sntech.de>
> ---
Applied to clk-next
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
next prev parent reply other threads:[~2015-10-01 23:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-04 0:15 [PATCH v3] clk: rockchip: reset init state before mmc card initialization Shawn Lin
2015-09-04 0:15 ` Shawn Lin
2015-10-01 23:37 ` Stephen Boyd [this message]
2015-10-01 23:37 ` Stephen Boyd
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