Interrupt-driven I/O seems to completely go off the rails, at least
on AllWinner implementations of this controller, so force polled mode for now.
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parent
86465dbe5a
commit
839cd8df19
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@ -1,4 +1,4 @@
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/* $NetBSD: gttwsi_core.c,v 1.15 2020/01/13 12:53:46 thorpej Exp $ */
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/* $NetBSD: gttwsi_core.c,v 1.16 2020/02/15 23:42:01 thorpej Exp $ */
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/*
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* Copyright (c) 2008 Eiji Kawauchi.
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* All rights reserved.
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@ -66,7 +66,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: gttwsi_core.c,v 1.15 2020/01/13 12:53:46 thorpej Exp $");
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__KERNEL_RCSID(0, "$NetBSD: gttwsi_core.c,v 1.16 2020/02/15 23:42:01 thorpej Exp $");
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#include "locators.h"
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#include <sys/param.h>
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@ -317,6 +317,13 @@ gttwsi_wait(struct gttwsi_softc *sc, uint32_t control, uint32_t expect,
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uint32_t status;
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int timo, error = 0;
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/*
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* XXX Interrupt-driven mode seems to be horribly broken,
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* XXX at least on AllWinner implementations. Force polled
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* XXX mode for now.
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*/
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flags |= I2C_F_POLL;
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DELAY(5);
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if (!(flags & I2C_F_POLL))
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control |= CONTROL_INTEN;
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