From: Tejun Heo <tj@kernel.org>
To: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: linux-ide@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
Andy Gross <andy.gross@linaro.org>,
Hans de Goede <hdegoede@redhat.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, jmaggard10@gmail.com
Subject: Re: [PATCH v2 2/3] ata: ahci-platform: Add ports-implemented DT bindings.
Date: Thu, 31 Mar 2016 13:34:07 -0400 [thread overview]
Message-ID: <20160331173407.GE24661@htj.duckdns.org> (raw)
In-Reply-To: <1459445500-9071-3-git-send-email-srinivas.kandagatla@linaro.org>
On Thu, Mar 31, 2016 at 06:31:39PM +0100, Srinivas Kandagatla wrote:
> On some SOCs PORTS_IMPL register value is never programmed by the
> firmware and left at zero value. Which means that no sata ports are
> available for software. AHCI driver used to cope up with this by
> fabricating the port_map if the PORTS_IMPL register is read zero,
> but recent patch broke this workaround as zero value was valid for
> NVMe disks.
>
> This patch adds ports-implemented DT bindings as workaround for this issue
> in a way that DT can can override the PORTS_IMPL register in cases where
> the firmware did not program it already.
>
> Fixes: 566d1827df2e ("libata: disable forced PORTS_IMPL for >= AHCI 1.3)
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
For 1 and 2,
Acked-by: Tejun Heo <tj@kernel.org>
I can route all three through libata/for-4.6-fixes once the platform
side is acked. If it's better to route these through the platform
tree, please feel free to do so.
Thanks.
--
tejun
next prev parent reply other threads:[~2016-03-31 17:34 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-31 17:31 [PATCH v2 0/3] ahci: add ports-implemented dt bindings Srinivas Kandagatla
2016-03-31 17:31 ` [PATCH v2 1/3] libahci: save port map for forced port map Srinivas Kandagatla
2016-03-31 18:24 ` Andy Gross
2016-03-31 17:31 ` [PATCH v2 2/3] ata: ahci-platform: Add ports-implemented DT bindings Srinivas Kandagatla
2016-03-31 17:34 ` Tejun Heo [this message]
2016-03-31 18:23 ` Andy Gross
2016-03-31 17:31 ` [PATCH v2 3/3] ARM: dts: apq8064: add ahci ports-implemented mask Srinivas Kandagatla
2016-03-31 18:20 ` Andy Gross
2016-03-31 20:25 ` Sergei Shtylyov
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