PERFORCE change 171817 for review

[Rafal Jaworowski]

http://p4web.freebsd.org/chv.cgi?CH=171817

Change 171817 by raj at raj_fdt on 2009/12/15 22:29:35

	Provide helper routine for checking node compatibility.
	
	It will be useful for FDT-enabled devices, when matching for
	'compatible' property, as they can often have multi-string form e.g.:
	
	compatible = "fsl,mpc8572-elbc", "fsl,elbc", "simple-bus";
	compatible = "fsl,mpc8572-dma", "fsl,eloplus-dma";
	compatible = "fsl,mpc8572-msi", "fsl,mpic-msi";

Affected files ...

.. //depot/projects/fdt/sys/dev/ofw/ofw_bus_subr.c#2 edit
.. //depot/projects/fdt/sys/dev/ofw/ofw_bus_subr.h#2 edit

Differences ...

==== //depot/projects/fdt/sys/dev/ofw/ofw_bus_subr.c#2 (text+ko) ====

@@ -146,6 +146,38 @@
 	return (obd->obd_type);
 }
 
+int
+ofw_bus_is_compatible(device_t dev, const char *onecompat)
+{
+	phandle_t node;
+	const char *compat;
+	int len, onelen, l;
+
+	if ((compat = ofw_bus_get_compat(dev)) == NULL)
+		return (0);
+
+	if ((node = ofw_bus_get_node(dev)) == 0)
+		return (0);
+
+	/* Get total 'compatible' prop len */
+	if ((len = OF_getproplen(node, "compatible")) <= 0)
+		return (0);
+
+	onelen = strlen(onecompat);
+
+	while (len > 0) {
+		if (strncasecmp(compat, onecompat, onelen) == 0)
+			/* Found it. */
+			return (1);
+
+		/* Slide to the next sub-string. */
+		l = strlen(compat) + 1;
+		compat += l;
+		len -= l;
+	}
+	return (0);
+}
+
 void
 ofw_bus_setup_iinfo(phandle_t node, struct ofw_bus_iinfo *ii, int intrsz)
 {

==== //depot/projects/fdt/sys/dev/ofw/ofw_bus_subr.h#2 (text+ko) ====

@@ -67,4 +67,7 @@
 int	ofw_bus_search_intrmap(void *, int, void *, int, void *, int, void *,
 	    void *, void *, int);
 
+/* Helper routine for checking compat prop */
+int ofw_bus_is_compatible(device_t, const char *);
+
 #endif /* !_DEV_OFW_OFW_BUS_SUBR_H_ */