svn commit: r329506 - head/sys/arm/freescale/imx

Ian Lepore ian at FreeBSD.org
Sun Feb 18 02:01:42 UTC 2018


Author: ian
Date: Sun Feb 18 02:01:41 2018
New Revision: 329506
URL: https://svnweb.freebsd.org/changeset/base/329506

Log:
  Add a detach method so that this can be a kldunload-friendly module.

Modified:
  head/sys/arm/freescale/imx/imx_i2c.c

Modified: head/sys/arm/freescale/imx/imx_i2c.c
==============================================================================
--- head/sys/arm/freescale/imx/imx_i2c.c	Sun Feb 18 01:42:17 2018	(r329505)
+++ head/sys/arm/freescale/imx/imx_i2c.c	Sun Feb 18 02:01:41 2018	(r329506)
@@ -154,6 +154,7 @@ struct i2c_softc {
 static phandle_t i2c_get_node(device_t, device_t);
 static int i2c_probe(device_t);
 static int i2c_attach(device_t);
+static int i2c_detach(device_t);
 
 static int i2c_repeated_start(device_t, u_char, int);
 static int i2c_start(device_t, u_char, int);
@@ -165,6 +166,7 @@ static int i2c_write(device_t, const char *, int, int 
 static device_method_t i2c_methods[] = {
 	DEVMETHOD(device_probe,			i2c_probe),
 	DEVMETHOD(device_attach,		i2c_attach),
+	DEVMETHOD(device_detach,		i2c_detach),
 
 	/* OFW methods */
 	DEVMETHOD(ofw_bus_get_node,		i2c_get_node),
@@ -445,6 +447,28 @@ no_recovery:
 
 	/* Probe and attach the iicbus when interrupts are available. */
 	config_intrhook_oneshot((ich_func_t)bus_generic_attach, dev);
+	return (0);
+}
+
+static int
+i2c_detach(device_t dev)
+{
+	struct i2c_softc *sc;
+	int error;
+
+	sc = device_get_softc(dev);
+
+	if ((error = bus_generic_detach(sc->dev)) != 0) {
+		device_printf(sc->dev, "cannot detach child devices\n");
+		return (error);
+	}
+
+	if (sc->iicbus != NULL)
+		device_delete_child(dev, sc->iicbus);
+
+	if (sc->res != NULL)
+		bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->res);
+
 	return (0);
 }
 


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