@@ -17,6 +17,7 @@ Required properties:
- model : precise model of the QE, Can be "QE", "CPM", or "CPM2"
- reg : offset and length of the device registers.
- bus-frequency : the clock frequency for QUICC Engine.
+- fsl,qe-num-riscs: define how many RISC engines the QE has.
Recommended properties
- brg-frequency : the internal clock source frequency for baud-rate
@@ -152,6 +152,8 @@ unsigned int qe_get_brg_clk(void);
int qe_setbrg(enum qe_clock brg, unsigned int rate, unsigned int multiplier);
int qe_get_snum(void);
void qe_put_snum(u8 snum);
+unsigned int qe_get_num_of_risc(void);
+
/* we actually use cpm_muram implementation, define this for convenience */
#define qe_muram_init cpm_muram_init
#define qe_muram_alloc cpm_muram_alloc
@@ -231,12 +233,16 @@ struct qe_bd {
#define QE_ALIGNMENT_OF_PRAM 64
/* RISC allocation */
-enum qe_risc_allocation {
- QE_RISC_ALLOCATION_RISC1 = 1, /* RISC 1 */
- QE_RISC_ALLOCATION_RISC2 = 2, /* RISC 2 */
- QE_RISC_ALLOCATION_RISC1_AND_RISC2 = 3 /* Dynamically choose
- RISC 1 or RISC 2 */
-};
+#define QE_RISC_ALLOCATION_RISC1 0x1 /* RISC 1 */
+#define QE_RISC_ALLOCATION_RISC2 0x2 /* RISC 2 */
+#define QE_RISC_ALLOCATION_RISC3 0x4 /* RISC 3 */
+#define QE_RISC_ALLOCATION_RISC4 0x8 /* RISC 4 */
+#define QE_RISC_ALLOCATION_RISC1_AND_RISC2 (QE_RISC_ALLOCATION_RISC1 | \
+ QE_RISC_ALLOCATION_RISC2)
+#define QE_RISC_ALLOCATION_FOUR_RISCS (QE_RISC_ALLOCATION_RISC1 | \
+ QE_RISC_ALLOCATION_RISC2 | \
+ QE_RISC_ALLOCATION_RISC3 | \
+ QE_RISC_ALLOCATION_RISC4)
/* QE extended filtering Table Lookup Key Size */
enum qe_fltr_tbl_lookup_key_size {
@@ -575,3 +575,31 @@ struct qe_firmware_info *qe_get_firmware_info(void)
}
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);
+
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 qe node in dts. Add new property "fsl,qe-num-riscs" description in qe.txt Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com> --- v2 change: rename the new property to "fsl,qe-num-riscs" and move this node to Required section in qe.txt. .../powerpc/dts-bindings/fsl/cpm_qe/qe.txt | 1 + arch/powerpc/include/asm/qe.h | 18 ++++++++---- arch/powerpc/sysdev/qe_lib/qe.c | 28 ++++++++++++++++++++ 3 files changed, 41 insertions(+), 6 deletions(-)