soundwire: intel: add debugfs callbacks in hw_ops

No functionality change, only add indirection for debugfs helpers.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20221111013135.38289-3-yung-chuan.liao@linux.intel.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/soundwire/intel.c

@@ -1423,6 +1423,9 @@ static int intel_stop_bus(struct sdw_intel *sdw, bool clock_stop)
 }
 
 const struct sdw_intel_hw_ops sdw_intel_cnl_hw_ops = {
+	.debugfs_init = intel_debugfs_init,
+	.debugfs_exit = intel_debugfs_exit,
+
 	.pre_bank_switch = intel_pre_bank_switch,
 	.post_bank_switch = intel_post_bank_switch,
 };
@@ -1614,7 +1617,7 @@ int intel_link_startup(struct auxiliary_device *auxdev)
 		goto err_power_up;
 	}
 
-	intel_debugfs_init(sdw);
+	sdw_intel_debugfs_init(sdw);
 
 	/* start bus */
 	ret = intel_start_bus(sdw);
@@ -1685,7 +1688,7 @@ static void intel_link_remove(struct auxiliary_device *auxdev)
 	 * SDW_INTEL_CLK_STOP_NOT_ALLOWED
 	 */
 	if (!bus->prop.hw_disabled) {
-		intel_debugfs_exit(sdw);
+		sdw_intel_debugfs_exit(sdw);
 		sdw_cdns_enable_interrupt(cdns, false);
 	}
 	sdw_bus_master_delete(bus);

drivers/soundwire/intel.h

@@ -61,4 +61,20 @@ struct sdw_intel_link_dev {
 #define auxiliary_dev_to_sdw_intel_link_dev(auxiliary_dev) \
 	container_of(auxiliary_dev, struct sdw_intel_link_dev, auxdev)
 
+#define SDW_INTEL_CHECK_OPS(sdw, cb)	((sdw) && (sdw)->link_res && (sdw)->link_res->hw_ops && \
+					 (sdw)->link_res->hw_ops->cb)
+#define SDW_INTEL_OPS(sdw, cb)		((sdw)->link_res->hw_ops->cb)
+
+static inline void sdw_intel_debugfs_init(struct sdw_intel *sdw)
+{
+	if (SDW_INTEL_CHECK_OPS(sdw, debugfs_init))
+		SDW_INTEL_OPS(sdw, debugfs_init)(sdw);
+}
+
+static inline void sdw_intel_debugfs_exit(struct sdw_intel *sdw)
+{
+	if (SDW_INTEL_CHECK_OPS(sdw, debugfs_exit))
+		SDW_INTEL_OPS(sdw, debugfs_exit)(sdw);
+}
+
 #endif /* __SDW_INTEL_LOCAL_H */

include/linux/soundwire/sdw_intel.h

@@ -297,10 +297,15 @@ irqreturn_t sdw_intel_thread(int irq, void *dev_id);
 struct sdw_intel;
 
 /* struct intel_sdw_hw_ops - SoundWire ops for Intel platforms.
+ * @debugfs_init: initialize all debugfs capabilities
+ * @debugfs_exit: close and cleanup debugfs capabilities
  * @pre_bank_switch: helper for bus management
  * @post_bank_switch: helper for bus management
  */
 struct sdw_intel_hw_ops {
+	void (*debugfs_init)(struct sdw_intel *sdw);
+	void (*debugfs_exit)(struct sdw_intel *sdw);
+
 	int (*pre_bank_switch)(struct sdw_intel *sdw);
 	int (*post_bank_switch)(struct sdw_intel *sdw);
 };