ipq8064: Enabling sata port ipq8064 based devices
authorRoman Glova <roman_glova@epam.com>
Tue, 12 Feb 2019 01:59:00 +0000 (20:59 -0500)
committerChristian Lamparter <chunkeey@gmail.com>
Thu, 14 Feb 2019 15:56:15 +0000 (16:56 +0100)
commit064e4315750fbb80b21293c87cae0abb2c257d9b
tree411df72dc36fdfc5248e450bb5a95acfd1470e2a
parent93d4439454247fb3f7cc88d8ad9a7e80bb440145
ipq8064: Enabling sata port ipq8064 based devices

(original text here: https://patchwork.kernel.org/patch/8686761/)

On some SOCs PORTS_IMPL register value is never programmed by the BIOS
and left at zero value. Which means that no sata ports are avaiable 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 dictate the port_map incase where the SOCs does not
program it already.

This patch is equal to commits:
67f8425d0ee1 ("ipq8064: dts: force AP148 SATA port mapping")
2e7a2c91019c ("ARM: dts: qcom: Move common nodes to ipq8064-v.1.0.dtsi")
in the upstream linux kernel.

Signed-off-by: Roman Glova <roman_glova@epam.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
[added upstream commits, reorg' commit message]
target/linux/ipq806x/files-4.14/arch/arm/boot/dts/qcom-ipq8064.dtsi