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(parent: 24b56f6) | patch
ig4(4): Fix SDA HOLD time set too low on Skylake controllers
authorVladimir Kondratyev <wulf@FreeBSD.org>
Sun, 15 Sep 2019 19:16:42 +0000 (19:16 +0000)
committerVladimir Kondratyev <wulf@FreeBSD.org>
Sun, 15 Sep 2019 19:16:42 +0000 (19:16 +0000)
commit746cae52fed43f00c2cb427e4f636db18a8b38e6
tree06fed8ea3c93d4cc5fbddea1766583a71904210dtree | snapshot
parent24b56f63bbe5a65ca2ef5e6ed7ff0190e9932550commit | diff
ig4(4): Fix SDA HOLD time set too low on Skylake controllers

Execution of "Soft reset" command (IG4_REG_RESETS_SKL) at controller init
stage sets SDA_HOLD register value to 0x0001 which is often too low for
normal operation.

Set SDA_HOLD back to 28 after reset to restore controller functionality.

PR: 240339
Reported by: imp, GregV, et al.
sys/dev/ichiic/ig4_iic.c diff | blob | history
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