Merge tag 'i3c/for-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux

Pull i3c updates from Alexandre Belloni:
 "Core:
   - Fix SETDASA when static and dynamic adress are equal
   - Fix cmd_v1 DAA exit criteria

  Drivers:
   - svc: allow probing without any device"

* tag 'i3c/for-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux:
  i3c: master: svc: fix probe failure when no i3c device exist
  i3c: master: Fix SETDASA process
  dt-bindings: i3c: Fix description for assigned-address
  i3c: master: svc: Describe member 'saved_regs'
  i3c: master: svc: Do not check for 0 return after calling platform_get_irq()
  i3c/master: cmd_v1: Fix the exit criteria for the daa procedure
  i3c: Explicitly include correct DT includes

Author: torvalds

Documentation/devicetree/bindings/i3c/i3c.yaml

@@ -135,9 +135,10 @@ patternProperties:
         minimum: 0x1
         maximum: 0xff
         description: |
-          Dynamic address to be assigned to this device. This property is only
-          valid if the I3C device has a static address (first cell of the reg
-          property != 0).
+          Dynamic address to be assigned to this device. In case static address is
+          present (first cell of the reg property != 0), this address is assigned
+          through SETDASA. If static address is not present, this address is assigned
+          through SETNEWDA after assigning a temporary address via ENTDAA.
 
     required:
       - reg
@@ -163,12 +164,18 @@ examples:
             pagesize = <0x8>;
         };
 
-        /* I3C device with a static I2C address. */
+        /* I3C device with a static I2C address and assigned address. */
         thermal_sensor: sensor@68,39200144004 {
             reg = <0x68 0x392 0x144004>;
             assigned-address = <0xa>;
         };
 
+        /* I3C device with only assigned address. */
+        pressure_sensor: sensor@0,39200124004 {
+            reg = <0x0 0x392 0x124000>;
+            assigned-address = <0xc>;
+        };
+
         /*
          * I3C device without a static I2C address but requiring
          * resources described in the DT.

drivers/i3c/master.c

@@ -1308,7 +1308,11 @@ static int i3c_master_get_i3c_addrs(struct i3c_dev_desc *dev)
 	if (dev->info.static_addr) {
 		status = i3c_bus_get_addr_slot_status(&master->bus,
 						      dev->info.static_addr);
-		if (status != I3C_ADDR_SLOT_FREE)
+		/* Since static address and assigned dynamic address can be
+		 * equal, allow this case to pass.
+		 */
+		if (status != I3C_ADDR_SLOT_FREE &&
+		    dev->info.static_addr != dev->boardinfo->init_dyn_addr)
 			return -EBUSY;
 
 		i3c_bus_set_addr_slot_status(&master->bus,

drivers/i3c/master/ast2600-i3c-master.c

@@ -8,7 +8,6 @@
 #include <linux/mfd/syscon.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
 

drivers/i3c/master/i3c-master-cdns.c

@@ -22,7 +22,6 @@
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/workqueue.h>
-#include <linux/of_device.h>
 
 #define DEV_ID				0x0
 #define DEV_ID_I3C_MASTER		0x5034

drivers/i3c/master/mipi-i3c-hci/cmd_v1.c

@@ -339,7 +339,7 @@ static int hci_cmd_v1_daa(struct i3c_hci *hci)
 			break;
 		}
 		if (RESP_STATUS(xfer[0].response) == RESP_ERR_NACK &&
-		    RESP_STATUS(xfer[0].response) == 1) {
+		    RESP_DATA_LENGTH(xfer->response) == 1) {
 			ret = 0;  /* no more devices to be assigned */
 			break;
 		}

drivers/i3c/master/svc-i3c-master.c

@@ -156,6 +156,7 @@ struct svc_i3c_regs_save {
  * @base: I3C master controller
  * @dev: Corresponding device
  * @regs: Memory mapping
+ * @saved_regs: Volatile values for PM operations
  * @free_slots: Bit array of available slots
  * @addrs: Array containing the dynamic addresses of each attached device
  * @descs: Array of descriptors, one per attached device
@@ -789,6 +790,10 @@ static int svc_i3c_master_do_daa_locked(struct svc_i3c_master *master,
 				 */
 				break;
 			} else if (SVC_I3C_MSTATUS_NACKED(reg)) {
+				/* No I3C devices attached */
+				if (dev_nb == 0)
+					break;
+
 				/*
 				 * A slave device nacked the address, this is
 				 * allowed only once, DAA will be stopped and
@@ -1263,11 +1268,17 @@ static int svc_i3c_master_send_ccc_cmd(struct i3c_master_controller *m,
 {
 	struct svc_i3c_master *master = to_svc_i3c_master(m);
 	bool broadcast = cmd->id < 0x80;
+	int ret;
 
 	if (broadcast)
-		return svc_i3c_master_send_bdcast_ccc_cmd(master, cmd);
+		ret = svc_i3c_master_send_bdcast_ccc_cmd(master, cmd);
 	else
-		return svc_i3c_master_send_direct_ccc_cmd(master, cmd);
+		ret = svc_i3c_master_send_direct_ccc_cmd(master, cmd);
+
+	if (ret)
+		cmd->err = I3C_ERROR_M2;
+
+	return ret;
 }
 
 static int svc_i3c_master_priv_xfers(struct i3c_dev_desc *dev,
@@ -1518,8 +1529,8 @@ static int svc_i3c_master_probe(struct platform_device *pdev)
 		return PTR_ERR(master->sclk);
 
 	master->irq = platform_get_irq(pdev, 0);
-	if (master->irq <= 0)
-		return -ENOENT;
+	if (master->irq < 0)
+		return master->irq;
 
 	master->dev = dev;