[src/trunk]: src/sys/dev/i2c allow i2c address 0x01-0x7F

[kardel <kardel%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/aa8fad4bea00
branches:  trunk
changeset: 796977:aa8fad4bea00
user:      kardel <kardel%NetBSD.org@localhost>
date:      Sun Jun 29 09:52:43 2014 +0000

description:
allow i2c address 0x01-0x7F
ignore responses if the sensor is in command mode

diffstat:

 sys/dev/i2c/hytp14.c |  21 ++++++++++++---------
 1 files changed, 12 insertions(+), 9 deletions(-)

diffs (56 lines):

diff -r 3eda76e3ef6e -r aa8fad4bea00 sys/dev/i2c/hytp14.c
--- a/sys/dev/i2c/hytp14.c      Sun Jun 29 09:32:24 2014 +0000
+++ b/sys/dev/i2c/hytp14.c      Sun Jun 29 09:52:43 2014 +0000
@@ -37,7 +37,7 @@
  */ 
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: hytp14.c,v 1.1 2014/05/18 11:46:23 kardel Exp $");
+__KERNEL_RCSID(0, "$NetBSD: hytp14.c,v 1.2 2014/06/29 09:52:43 kardel Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -98,8 +98,8 @@
                if (strcmp(ia->ia_name, "hythygtemp") == 0)
                        return 1;
        } else {
-               /* indirect config - check typical address */
-               if (ia->ia_addr == HYTP14_DEFAULT_ADDR)
+               /* indirect config - check for configured address */
+               if ((ia->ia_addr > 0) && (ia->ia_addr <= 0x7F))
                        return 1;
        }
        return 0;
@@ -189,15 +189,17 @@
 
                /* send MR command */
                 /* avoid quick read/write by providing a result buffer */
-               if ((error = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
-                                     sc->sc_addr, NULL, 0, buf, sizeof buf, 0)) == 0) {
+               error = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
+                                sc->sc_addr, NULL, 0, buf, sizeof buf, 0);
+                if (error == 0) {
                        DPRINTF(3, ("hytp14_refresh_sensor(%s): MR sent\n",
                                    device_xname(sc->sc_dev)));
 
                        /* send DF command - read data from sensor */
-                       if ((error = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
-                                             sc->sc_addr, NULL, 0, sc->sc_data,
-                                             sizeof sc->sc_data, 0)) != 0) {
+                       error = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
+                                        sc->sc_addr, NULL, 0, sc->sc_data,
+                                             sizeof sc->sc_data, 0);
+                        if (error != 0) {
                                DPRINTF(2, ("%s: %s: failed read from 0x%02x - error %d\n",
                                            device_xname(sc->sc_dev),
                                            __func__, sc->sc_addr, error));
@@ -224,7 +226,8 @@
                        
        sc->sc_refresh = hardclock_ticks;
        
-       if (error == 0) {
+       /* skip data if sensor is in command mode */
+       if (error == 0 && (sc->sc_data[0] & HYTP14_RESP_CMDMODE) == 0) {
                sc->sc_valid = ENVSYS_SVALID;
        } else {
                sc->sc_valid = ENVSYS_SINVALID;