Author: raj
Date: Mon Jan 26 13:53:39 2009
New Revision: 187709
URL: http://svn.freebsd.org/changeset/base/187709
Log:
Teach iic(4) the 'repeated start' I2C condition. This will be used by the
upcoming i2c(8) diag utility.
Reviewed by: bms, stas
Obtained from: Semihalf
Modified:
head/share/man/man4/iic.4
head/sys/dev/iicbus/iic.c
head/sys/dev/iicbus/iic.h
Modified: head/share/man/man4/iic.4
==============================================================================
--- head/share/man/man4/iic.4 Mon Jan 26 12:59:11 2009 (r187708)
+++ head/share/man/man4/iic.4 Mon Jan 26 13:53:39 2009 (r187709)
@@ -45,13 +45,19 @@ In order to control I2C devices, use
.Pa /dev/iic?
with the
following ioctls:
-.Bl -tag -width ".Dv I2CRSTCARD"
+.Bl -tag -width ".Dv I2CRPTSTART"
.It Dv I2CSTART
.Pq Vt "struct iiccmd"
Sends the start condition to the slave specified by the
.Va slave
element to the bus.
All other elements are ignored.
+.It Dv I2CRPTSTART
+.Pq Vt "struct iiccmd"
+Sends the repeated start condition to the slave specified by the
+.Va slave
+element to the bus.
+All other elements are ignored.
.It Dv I2CSTOP
No argument is passed.
Sends the stop condition to the bus.
Modified: head/sys/dev/iicbus/iic.c
==============================================================================
--- head/sys/dev/iicbus/iic.c Mon Jan 26 12:59:11 2009 (r187708)
+++ head/sys/dev/iicbus/iic.c Mon Jan 26 13:53:39 2009 (r187709)
@@ -368,6 +368,11 @@ iicioctl(struct cdev *dev, u_long cmd, c
}
free(usrbufs, M_TEMP);
break;
+
+ case I2CRPTSTART:
+ error = iicbus_repeated_start(parent, s->slave, 0);
+ break;
+
default:
error = ENOTTY;
}
Modified: head/sys/dev/iicbus/iic.h
==============================================================================
--- head/sys/dev/iicbus/iic.h Mon Jan 26 12:59:11 2009 (r187708)
+++ head/sys/dev/iicbus/iic.h Mon Jan 26 13:53:39 2009 (r187709)
@@ -60,5 +60,6 @@ struct iic_rdwr_data {
#define I2CWRITE _IOW('i', 4, struct iiccmd) /* send data */
#define I2CREAD _IOW('i', 5, struct iiccmd) /* receive data
*/
#define I2CRDWR _IOW('i', 6, struct iic_rdwr_data) /*
General read/write interface */
+#define I2CRPTSTART _IOW('i', 7, struct iiccmd) /* repeated start */
#endif
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