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authorEgor Starkov <egor.starkov@ge.com>2017-11-13 13:31:01 +0300
committerTejun Heo <tj@kernel.org>2017-11-13 23:17:43 +0300
commit5bca462d2d18b1c9ec86c7985753134f06fa5cd2 (patch)
tree35ae15edbfd4f71ab649d4fa00edf89b22196152 /Documentation/devicetree/bindings
parent47e46613d84d2750eb70a7ff07a03ed8ffbec5af (diff)
downloadlinux-5bca462d2d18b1c9ec86c7985753134f06fa5cd2.tar.xz
ahci: imx: Handle increased read failures for IMX53 temperature sensor in low frequency mode.
Extended testing has shown that the imx ahci driver sometimes requires more than the 100 attempts currently alotted in the driver to perform a successful temperature reading when running at minimum (throttled) CPU frequency. Debugging suggests that the read cycle can take 160 attempts (which given that the driver averages 80 readings from the ADC equates to one failure on each read). Increase the attempt limit to 200 in order to greatly reduce the likelihood of the driver failing to perform a temperature reading, especially at low CPU frequency. Signed-off-by: Egor Starkov <egor.starkov@ge.com> Signed-off-by: Martyn Welch <martyn.welch@collabora.co.uk> Signed-off-by: Tejun Heo <tj@kernel.org>
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