powerpc/qe: update risc allocation for QE
Change the RISC allocation to macros instead of enum, add function to read
the number of risc engines from the new property "fsl,qe-num-riscs" under
the qe node in dts. Add new property "fsl,qe-num-riscs" description in
qe.txt
Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com>
Acked-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/sysdev/qe_lib/qe.c b/arch/powerpc/sysdev/qe_lib/qe.c
index 01bce37..2533677 100644
--- a/arch/powerpc/sysdev/qe_lib/qe.c
+++ b/arch/powerpc/sysdev/qe_lib/qe.c
@@ -575,3 +575,31 @@
}
EXPORT_SYMBOL(qe_get_firmware_info);
+unsigned int qe_get_num_of_risc(void)
+{
+ struct device_node *qe;
+ int size;
+ unsigned int num_of_risc = 0;
+ const u32 *prop;
+
+ qe = of_find_compatible_node(NULL, NULL, "fsl,qe");
+ if (!qe) {
+ /* Older devices trees did not have an "fsl,qe"
+ * compatible property, so we need to look for
+ * the QE node by name.
+ */
+ qe = of_find_node_by_type(NULL, "qe");
+ if (!qe)
+ return num_of_risc;
+ }
+
+ prop = of_get_property(qe, "fsl,qe-num-riscs", &size);
+ if (prop && size == sizeof(*prop))
+ num_of_risc = *prop;
+
+ of_node_put(qe);
+
+ return num_of_risc;
+}
+EXPORT_SYMBOL(qe_get_num_of_risc);
+