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adb: add property to disable direct reg 3 writes

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MacOS 9 has a bug in its PMU driver whereby after configuring the ADB bus
devices it sends another write to reg 3 on both devices resetting them
both back to the same address.

Add a new disable_direct_reg3_writes property to ADBDevice to disable these
direct writes which can enabled just for the upcoming pmu-adb support.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Mark Cave-Ayland 2018-06-12 17:44:01 +01:00 • committed by David Gibson
parent fb6649f172
commit 84051eb400
4 changed files with 42 additions and 28 deletions
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include/hw/input/adb.h
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@ -49,6 +49,7 @@ struct ADBDevice {
int devaddr;
int handler;
bool disable_direct_reg3_writes;
};
#define ADB_DEVICE_CLASS(cls) \