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The ADM1027 chip doesn't support i2c read_byte protocol, so in this 

case we use send_byte followed by receive_byte.
This commit is contained in:
pgoyette 2009-02-08 17:48:02 +00:00
parent 8e52b87ec3
commit 66a822fbe7
1 changed files with 10 additions and 3 deletions
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13
sys/dev/i2c/dbcool.c
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@ -1,4 +1,4 @@
/* $NetBSD: dbcool.c,v 1.9 2009/02/08 14:34:40 pgoyette Exp $ */
/* $NetBSD: dbcool.c,v 1.10 2009/02/08 17:48:02 pgoyette Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
@ -49,7 +49,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: dbcool.c,v 1.9 2009/02/08 14:34:40 pgoyette Exp $");
__KERNEL_RCSID(0, "$NetBSD: dbcool.c,v 1.10 2009/02/08 17:48:02 pgoyette Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -701,7 +701,14 @@ dbcool_readreg(struct dbcool_softc *sc, uint8_t reg)
if (iic_acquire_bus(sc->sc_tag, 0) != 0)
goto bad;
(void)iic_smbus_read_byte(sc->sc_tag, sc->sc_addr, reg, &data, 0);
if (sc->sc_chip->flags & DBCFLAG_ADM1027) {
/* ADM1027 doesn't support i2c read_byte protocol */
if (iic_smbus_send_byte(sc->sc_tag, sc->sc_addr, reg, 0) != 0)
goto bad;
(void)iic_smbus_receive_byte(sc->sc_tag, sc->sc_addr, &data, 0);
} else
(void)iic_smbus_read_byte(sc->sc_tag, sc->sc_addr, reg, &data,
0);
bad:
iic_release_bus(sc->sc_tag, 0);