Merge tag 'char-misc-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char / misc driver updates from Greg KH:
 "Here is the big set of char / misc and other driver subsystem updates
  for 5.14-rc1. Included in here are:

   - habanalabs driver updates

   - fsl-mc driver updates

   - comedi driver updates

   - fpga driver updates

   - extcon driver updates

   - interconnect driver updates

   - mei driver updates

   - nvmem driver updates

   - phy driver updates

   - pnp driver updates

   - soundwire driver updates

   - lots of other tiny driver updates for char and misc drivers

  This is looking more and more like the "various driver subsystems
  mushed together" tree...

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (292 commits)
  mcb: Use DEFINE_RES_MEM() helper macro and fix the end address
  PNP: moved EXPORT_SYMBOL so that it immediately followed its function/variable
  bus: mhi: pci-generic: Add missing 'pci_disable_pcie_error_reporting()' calls
  bus: mhi: Wait for M2 state during system resume
  bus: mhi: core: Fix power down latency
  intel_th: Wait until port is in reset before programming it
  intel_th: msu: Make contiguous buffers uncached
  intel_th: Remove an unused exit point from intel_th_remove()
  stm class: Spelling fix
  nitro_enclaves: Set Bus Master for the NE PCI device
  misc: ibmasm: Modify matricies to matrices
  misc: vmw_vmci: return the correct errno code
  siox: Simplify error handling via dev_err_probe()
  fpga: machxo2-spi: Address warning about unused variable
  lkdtm/heap: Add init_on_alloc tests
  selftests/lkdtm: Enable various testable CONFIGs
  lkdtm: Add CONFIG hints in errors where possible
  lkdtm: Enable DOUBLE_FAULT on all architectures
  lkdtm/heap: Add vmalloc linear overflow test
  lkdtm/bugs: XFAIL UNALIGNED_LOAD_STORE_WRITE
  ...

11 files changed, 292 insertions, 231 deletions

diff --git a/drivers/soundwire/Kconfig b/drivers/soundwire/Kconfig
index 016e74230bb7..2b7795233282 100644
--- a/drivers/soundwire/Kconfig
+++ b/drivers/soundwire/Kconfig
@@ -25,6 +25,7 @@ config SOUNDWIRE_INTEL
 	tristate "Intel SoundWire Master driver"
 	select SOUNDWIRE_CADENCE
 	select SOUNDWIRE_GENERIC_ALLOCATION
+	select AUXILIARY_BUS
 	depends on ACPI && SND_SOC
 	help
 	  SoundWire Intel Master driver.
diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c
index 5d5b0bd59ae3..3e6d4addac2f 100644
--- a/drivers/soundwire/bus.c
+++ b/drivers/soundwire/bus.c
@@ -394,13 +394,13 @@ sdw_nread_no_pm(struct sdw_slave *slave, u32 addr, size_t count, u8 *val)
 }
 
 static int
-sdw_nwrite_no_pm(struct sdw_slave *slave, u32 addr, size_t count, u8 *val)
+sdw_nwrite_no_pm(struct sdw_slave *slave, u32 addr, size_t count, const u8 *val)
 {
 	struct sdw_msg msg;
 	int ret;
 
 	ret = sdw_fill_msg(&msg, slave, addr, count,
-			   slave->dev_num, SDW_MSG_FLAG_WRITE, val);
+			   slave->dev_num, SDW_MSG_FLAG_WRITE, (u8 *)val);
 	if (ret < 0)
 		return ret;
 
@@ -550,9 +550,9 @@ EXPORT_SYMBOL(sdw_nread);
  * @slave: SDW Slave
  * @addr: Register address
  * @count: length
- * @val: Buffer for values to be read
+ * @val: Buffer for values to be written
  */
-int sdw_nwrite(struct sdw_slave *slave, u32 addr, size_t count, u8 *val)
+int sdw_nwrite(struct sdw_slave *slave, u32 addr, size_t count, const u8 *val)
 {
 	int ret;
 
@@ -836,26 +836,6 @@ static void sdw_modify_slave_status(struct sdw_slave *slave,
 	mutex_unlock(&bus->bus_lock);
 }
 
-static enum sdw_clk_stop_mode sdw_get_clk_stop_mode(struct sdw_slave *slave)
-{
-	enum sdw_clk_stop_mode mode;
-
-	/*
-	 * Query for clock stop mode if Slave implements
-	 * ops->get_clk_stop_mode, else read from property.
-	 */
-	if (slave->ops && slave->ops->get_clk_stop_mode) {
-		mode = slave->ops->get_clk_stop_mode(slave);
-	} else {
-		if (slave->prop.clk_stop_mode1)
-			mode = SDW_CLK_STOP_MODE1;
-		else
-			mode = SDW_CLK_STOP_MODE0;
-	}
-
-	return mode;
-}
-
 static int sdw_slave_clk_stop_callback(struct sdw_slave *slave,
 				       enum sdw_clk_stop_mode mode,
 				       enum sdw_clk_stop_type type)
@@ -864,11 +844,8 @@ static int sdw_slave_clk_stop_callback(struct sdw_slave *slave,
 
 	if (slave->ops && slave->ops->clk_stop) {
 		ret = slave->ops->clk_stop(slave, mode, type);
-		if (ret < 0) {
-			dev_err(&slave->dev,
-				"Clk Stop type =%d failed: %d\n", type, ret);
+		if (ret < 0)
 			return ret;
-		}
 	}
 
 	return 0;
@@ -895,7 +872,8 @@ static int sdw_slave_clk_stop_prepare(struct sdw_slave *slave,
 	} else {
 		ret = sdw_read_no_pm(slave, SDW_SCP_SYSTEMCTRL);
 		if (ret < 0) {
-			dev_err(&slave->dev, "SDW_SCP_SYSTEMCTRL read failed:%d\n", ret);
+			if (ret != -ENODATA)
+				dev_err(&slave->dev, "SDW_SCP_SYSTEMCTRL read failed:%d\n", ret);
 			return ret;
 		}
 		val = ret;
@@ -904,9 +882,8 @@ static int sdw_slave_clk_stop_prepare(struct sdw_slave *slave,
 
 	ret = sdw_write_no_pm(slave, SDW_SCP_SYSTEMCTRL, val);
 
-	if (ret < 0)
-		dev_err(&slave->dev,
-			"Clock Stop prepare failed for slave: %d", ret);
+	if (ret < 0 && ret != -ENODATA)
+		dev_err(&slave->dev, "SDW_SCP_SYSTEMCTRL write failed:%d\n", ret);
 
 	return ret;
 }
@@ -924,7 +901,7 @@ static int sdw_bus_wait_for_clk_prep_deprep(struct sdw_bus *bus, u16 dev_num)
 		}
 		val &= SDW_SCP_STAT_CLK_STP_NF;
 		if (!val) {
-			dev_dbg(bus->dev, "clock stop prep/de-prep done slave:%d",
+			dev_dbg(bus->dev, "clock stop prep/de-prep done slave:%d\n",
 				dev_num);
 			return 0;
 		}
@@ -933,7 +910,7 @@ static int sdw_bus_wait_for_clk_prep_deprep(struct sdw_bus *bus, u16 dev_num)
 		retry--;
 	} while (retry);
 
-	dev_err(bus->dev, "clock stop prep/de-prep failed slave:%d",
+	dev_err(bus->dev, "clock stop prep/de-prep failed slave:%d\n",
 		dev_num);
 
 	return -ETIMEDOUT;
@@ -948,7 +925,6 @@ static int sdw_bus_wait_for_clk_prep_deprep(struct sdw_bus *bus, u16 dev_num)
  */
 int sdw_bus_prep_clk_stop(struct sdw_bus *bus)
 {
-	enum sdw_clk_stop_mode slave_mode;
 	bool simple_clk_stop = true;
 	struct sdw_slave *slave;
 	bool is_slave = false;
@@ -958,6 +934,9 @@ int sdw_bus_prep_clk_stop(struct sdw_bus *bus)
 	 * In order to save on transition time, prepare
 	 * each Slave and then wait for all Slave(s) to be
 	 * prepared for clock stop.
+	 * If one of the Slave devices has lost sync and
+	 * replies with Command Ignored/-ENODATA, we continue
+	 * the loop
 	 */
 	list_for_each_entry(slave, &bus->slaves, node) {
 		if (!slave->dev_num)
@@ -970,36 +949,45 @@ int sdw_bus_prep_clk_stop(struct sdw_bus *bus)
 		/* Identify if Slave(s) are available on Bus */
 		is_slave = true;
 
-		slave_mode = sdw_get_clk_stop_mode(slave);
-		slave->curr_clk_stop_mode = slave_mode;
-
-		ret = sdw_slave_clk_stop_callback(slave, slave_mode,
+		ret = sdw_slave_clk_stop_callback(slave,
+						  SDW_CLK_STOP_MODE0,
 						  SDW_CLK_PRE_PREPARE);
-		if (ret < 0) {
-			dev_err(&slave->dev,
-				"pre-prepare failed:%d", ret);
-			return ret;
-		}
-
-		ret = sdw_slave_clk_stop_prepare(slave,
-						 slave_mode, true);
-		if (ret < 0) {
-			dev_err(&slave->dev,
-				"pre-prepare failed:%d", ret);
+		if (ret < 0 && ret != -ENODATA) {
+			dev_err(&slave->dev, "clock stop pre-prepare cb failed:%d\n", ret);
 			return ret;
 		}
 
-		if (slave_mode == SDW_CLK_STOP_MODE1)
+		/* Only prepare a Slave device if needed */
+		if (!slave->prop.simple_clk_stop_capable) {
 			simple_clk_stop = false;
+
+			ret = sdw_slave_clk_stop_prepare(slave,
+							 SDW_CLK_STOP_MODE0,
+							 true);
+			if (ret < 0 && ret != -ENODATA) {
+				dev_err(&slave->dev, "clock stop prepare failed:%d\n", ret);
+				return ret;
+			}
+		}
 	}
 
 	/* Skip remaining clock stop preparation if no Slave is attached */
 	if (!is_slave)
-		return ret;
+		return 0;
 
+	/*
+	 * Don't wait for all Slaves to be ready if they follow the simple
+	 * state machine
+	 */
 	if (!simple_clk_stop) {
 		ret = sdw_bus_wait_for_clk_prep_deprep(bus,
 						       SDW_BROADCAST_DEV_NUM);
+		/*
+		 * if there are no Slave devices present and the reply is
+		 * Command_Ignored/-ENODATA, we don't need to continue with the
+		 * flow and can just return here. The error code is not modified
+		 * and its handling left as an exercise for the caller.
+		 */
 		if (ret < 0)
 			return ret;
 	}
@@ -1013,21 +1001,17 @@ int sdw_bus_prep_clk_stop(struct sdw_bus *bus)
 		    slave->status != SDW_SLAVE_ALERT)
 			continue;
 
-		slave_mode = slave->curr_clk_stop_mode;
-
-		if (slave_mode == SDW_CLK_STOP_MODE1) {
-			ret = sdw_slave_clk_stop_callback(slave,
-							  slave_mode,
-							  SDW_CLK_POST_PREPARE);
+		ret = sdw_slave_clk_stop_callback(slave,
+						  SDW_CLK_STOP_MODE0,
+						  SDW_CLK_POST_PREPARE);
 
-			if (ret < 0) {
-				dev_err(&slave->dev,
-					"post-prepare failed:%d", ret);
-			}
+		if (ret < 0 && ret != -ENODATA) {
+			dev_err(&slave->dev, "clock stop post-prepare cb failed:%d\n", ret);
+			return ret;
 		}
 	}
 
-	return ret;
+	return 0;
 }
 EXPORT_SYMBOL(sdw_bus_prep_clk_stop);
 
@@ -1050,12 +1034,8 @@ int sdw_bus_clk_stop(struct sdw_bus *bus)
 	ret = sdw_bwrite_no_pm(bus, SDW_BROADCAST_DEV_NUM,
 			       SDW_SCP_CTRL, SDW_SCP_CTRL_CLK_STP_NOW);
 	if (ret < 0) {
-		if (ret == -ENODATA)
-			dev_dbg(bus->dev,
-				"ClockStopNow Broadcast msg ignored %d", ret);
-		else
-			dev_err(bus->dev,
-				"ClockStopNow Broadcast msg failed %d", ret);
+		if (ret != -ENODATA)
+			dev_err(bus->dev, "ClockStopNow Broadcast msg failed %d\n", ret);
 		return ret;
 	}
 
@@ -1074,7 +1054,6 @@ EXPORT_SYMBOL(sdw_bus_clk_stop);
  */
 int sdw_bus_exit_clk_stop(struct sdw_bus *bus)
 {
-	enum sdw_clk_stop_mode mode;
 	bool simple_clk_stop = true;
 	struct sdw_slave *slave;
 	bool is_slave = false;
@@ -1096,33 +1075,36 @@ int sdw_bus_exit_clk_stop(struct sdw_bus *bus)
 		/* Identify if Slave(s) are available on Bus */
 		is_slave = true;
 
-		mode = slave->curr_clk_stop_mode;
-
-		if (mode == SDW_CLK_STOP_MODE1) {
-			simple_clk_stop = false;
-			continue;
-		}
-
-		ret = sdw_slave_clk_stop_callback(slave, mode,
+		ret = sdw_slave_clk_stop_callback(slave, SDW_CLK_STOP_MODE0,
 						  SDW_CLK_PRE_DEPREPARE);
 		if (ret < 0)
-			dev_warn(&slave->dev,
-				 "clk stop deprep failed:%d", ret);
+			dev_warn(&slave->dev, "clock stop pre-deprepare cb failed:%d\n", ret);
 
-		ret = sdw_slave_clk_stop_prepare(slave, mode,
-						 false);
+		/* Only de-prepare a Slave device if needed */
+		if (!slave->prop.simple_clk_stop_capable) {
+			simple_clk_stop = false;
 
-		if (ret < 0)
-			dev_warn(&slave->dev,
-				 "clk stop deprep failed:%d", ret);
+			ret = sdw_slave_clk_stop_prepare(slave, SDW_CLK_STOP_MODE0,
+							 false);
+
+			if (ret < 0)
+				dev_warn(&slave->dev, "clock stop deprepare failed:%d\n", ret);
+		}
 	}
 
 	/* Skip remaining clock stop de-preparation if no Slave is attached */
 	if (!is_slave)
 		return 0;
 
-	if (!simple_clk_stop)
-		sdw_bus_wait_for_clk_prep_deprep(bus, SDW_BROADCAST_DEV_NUM);
+	/*
+	 * Don't wait for all Slaves to be ready if they follow the simple
+	 * state machine
+	 */
+	if (!simple_clk_stop) {
+		ret = sdw_bus_wait_for_clk_prep_deprep(bus, SDW_BROADCAST_DEV_NUM);
+		if (ret < 0)
+			dev_warn(&slave->dev, "clock stop deprepare wait failed:%d\n", ret);
+	}
 
 	list_for_each_entry(slave, &bus->slaves, node) {
 		if (!slave->dev_num)
@@ -1132,9 +1114,10 @@ int sdw_bus_exit_clk_stop(struct sdw_bus *bus)
 		    slave->status != SDW_SLAVE_ALERT)
 			continue;
 
-		mode = slave->curr_clk_stop_mode;
-		sdw_slave_clk_stop_callback(slave, mode,
-					    SDW_CLK_POST_DEPREPARE);
+		ret = sdw_slave_clk_stop_callback(slave, SDW_CLK_STOP_MODE0,
+						  SDW_CLK_POST_DEPREPARE);
+		if (ret < 0)
+			dev_warn(&slave->dev, "clock stop post-deprepare cb failed:%d\n", ret);
 	}
 
 	return 0;
diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
index 192dac10f0c2..25950422b085 100644
--- a/drivers/soundwire/cadence_master.c
+++ b/drivers/soundwire/cadence_master.c
@@ -1428,20 +1428,6 @@ int sdw_cdns_clock_stop(struct sdw_cdns *cdns, bool block_wake)
 		}
 	}
 
-	/*
-	 * This CMD_ACCEPT should be used when there are no devices
-	 * attached on the link when entering clock stop mode. If this is
-	 * not set and there is a broadcast write then the command ignored
-	 * will be treated as a failure
-	 */
-	if (!slave_present)
-		cdns_updatel(cdns, CDNS_MCP_CONTROL,
-			     CDNS_MCP_CONTROL_CMD_ACCEPT,
-			     CDNS_MCP_CONTROL_CMD_ACCEPT);
-	else
-		cdns_updatel(cdns, CDNS_MCP_CONTROL,
-			     CDNS_MCP_CONTROL_CMD_ACCEPT, 0);
-
 	/* commit changes */
 	ret = cdns_config_update(cdns);
 	if (ret < 0) {
@@ -1508,11 +1494,8 @@ int sdw_cdns_clock_restart(struct sdw_cdns *cdns, bool bus_reset)
 	cdns_updatel(cdns, CDNS_MCP_CONTROL,
 		     CDNS_MCP_CONTROL_BLOCK_WAKEUP, 0);
 
-	/*
-	 * clear CMD_ACCEPT so that the command ignored
-	 * will be treated as a failure during a broadcast write
-	 */
-	cdns_updatel(cdns, CDNS_MCP_CONTROL, CDNS_MCP_CONTROL_CMD_ACCEPT, 0);
+	cdns_updatel(cdns, CDNS_MCP_CONTROL, CDNS_MCP_CONTROL_CMD_ACCEPT,
+		     CDNS_MCP_CONTROL_CMD_ACCEPT);
 
 	if (!bus_reset) {
 
diff --git a/drivers/soundwire/cadence_master.h b/drivers/soundwire/cadence_master.h
index 4d1aab5b5ec2..0e7f8b35bb21 100644
--- a/drivers/soundwire/cadence_master.h
+++ b/drivers/soundwire/cadence_master.h
@@ -180,9 +180,6 @@ enum sdw_command_response
 cdns_xfer_msg_defer(struct sdw_bus *bus,
 		    struct sdw_msg *msg, struct sdw_defer *defer);
 
-enum sdw_command_response
-cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num);
-
 int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params);
 
 int cdns_set_sdw_stream(struct snd_soc_dai *dai,
diff --git a/drivers/soundwire/dmi-quirks.c b/drivers/soundwire/dmi-quirks.c
index 82061c1d9835..5db0a2443a1d 100644
--- a/drivers/soundwire/dmi-quirks.c
+++ b/drivers/soundwire/dmi-quirks.c
@@ -80,7 +80,7 @@ u64 sdw_dmi_override_adr(struct sdw_bus *bus, u64 addr)
 	/* check if any address remap quirk applies */
 	dmi_id = dmi_first_match(adr_remap_quirk_table);
 	if (dmi_id) {
-		struct adr_remap *map = dmi_id->driver_data;
+		struct adr_remap *map;
 
 		for (map = dmi_id->driver_data; map->adr; map++) {
 			if (map->adr == addr) {
diff --git a/drivers/soundwire/generic_bandwidth_allocation.c b/drivers/soundwire/generic_bandwidth_allocation.c
index 84d129587084..f7c66083a4dd 100644
--- a/drivers/soundwire/generic_bandwidth_allocation.c
+++ b/drivers/soundwire/generic_bandwidth_allocation.c
@@ -382,12 +382,18 @@ static int sdw_compute_bus_params(struct sdw_bus *bus)
 		 */
 	}
 
-	if (i == clk_values)
+	if (i == clk_values) {
+		dev_err(bus->dev, "%s: could not find clock value for bandwidth %d\n",
+			__func__, bus->params.bandwidth);
 		return -EINVAL;
+	}
 
 	ret = sdw_select_row_col(bus, curr_dr_freq);
-	if (ret < 0)
+	if (ret < 0) {
+		dev_err(bus->dev, "%s: could not find frame configuration for bus dr_freq %d\n",
+			__func__, curr_dr_freq);
 		return -EINVAL;
+	}
 
 	bus->params.curr_dr_freq = curr_dr_freq;
 	return 0;
@@ -404,10 +410,8 @@ int sdw_compute_params(struct sdw_bus *bus)
 
 	/* Computes clock frequency, frame shape and frame frequency */
 	ret = sdw_compute_bus_params(bus);
-	if (ret < 0) {
-		dev_err(bus->dev, "Compute bus params failed: %d\n", ret);
+	if (ret < 0)
 		return ret;
-	}
 
 	/* Compute transport and port params */
 	ret = sdw_compute_port_params(bus);
diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index fd95f94630b1..c11e3d8cd308 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -11,7 +11,7 @@
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
-#include <linux/platform_device.h>
+#include <linux/auxiliary_bus.h>
 #include <sound/pcm_params.h>
 #include <linux/pm_runtime.h>
 #include <sound/soc.h>
@@ -1327,11 +1327,14 @@ static int intel_init(struct sdw_intel *sdw)
 }
 
 /*
- * probe and init
+ * probe and init (aux_dev_id argument is required by function prototype but not used)
  */
-static int intel_master_probe(struct platform_device *pdev)
+static int intel_link_probe(struct auxiliary_device *auxdev,
+			    const struct auxiliary_device_id *aux_dev_id)
+
 {
-	struct device *dev = &pdev->dev;
+	struct device *dev = &auxdev->dev;
+	struct sdw_intel_link_dev *ldev = auxiliary_dev_to_sdw_intel_link_dev(auxdev);
 	struct sdw_intel *sdw;
 	struct sdw_cdns *cdns;
 	struct sdw_bus *bus;
@@ -1344,14 +1347,14 @@ static int intel_master_probe(struct platform_device *pdev)
 	cdns = &sdw->cdns;
 	bus = &cdns->bus;
 
-	sdw->instance = pdev->id;
-	sdw->link_res = dev_get_platdata(dev);
+	sdw->instance = auxdev->id;
+	sdw->link_res = &ldev->link_res;
 	cdns->dev = dev;
 	cdns->registers = sdw->link_res->registers;
 	cdns->instance = sdw->instance;
 	cdns->msg_count = 0;
 
-	bus->link_id = pdev->id;
+	bus->link_id = auxdev->id;
 
 	sdw_cdns_probe(cdns);
 
@@ -1384,10 +1387,10 @@ static int intel_master_probe(struct platform_device *pdev)
 	return 0;
 }
 
-int intel_master_startup(struct platform_device *pdev)
+int intel_link_startup(struct auxiliary_device *auxdev)
 {
 	struct sdw_cdns_stream_config config;
-	struct device *dev = &pdev->dev;
+	struct device *dev = &auxdev->dev;
 	struct sdw_cdns *cdns = dev_get_drvdata(dev);
 	struct sdw_intel *sdw = cdns_to_intel(cdns);
 	struct sdw_bus *bus = &cdns->bus;
@@ -1524,9 +1527,9 @@ err_init:
 	return ret;
 }
 
-static int intel_master_remove(struct platform_device *pdev)
+static void intel_link_remove(struct auxiliary_device *auxdev)
 {
-	struct device *dev = &pdev->dev;
+	struct device *dev = &auxdev->dev;
 	struct sdw_cdns *cdns = dev_get_drvdata(dev);
 	struct sdw_intel *sdw = cdns_to_intel(cdns);
 	struct sdw_bus *bus = &cdns->bus;
@@ -1542,19 +1545,17 @@ static int intel_master_remove(struct platform_device *pdev)
 		snd_soc_unregister_component(dev);
 	}
 	sdw_bus_master_delete(bus);
-
-	return 0;
 }
 
-int intel_master_process_wakeen_event(struct platform_device *pdev)
+int intel_link_process_wakeen_event(struct auxiliary_device *auxdev)
 {
-	struct device *dev = &pdev->dev;
+	struct device *dev = &auxdev->dev;
 	struct sdw_intel *sdw;
 	struct sdw_bus *bus;
 	void __iomem *shim;
 	u16 wake_sts;
 
-	sdw = platform_get_drvdata(pdev);
+	sdw = dev_get_drvdata(dev);
 	bus = &sdw->cdns.bus;
 
 	if (bus->prop.hw_disabled) {
@@ -1976,17 +1977,22 @@ static const struct dev_pm_ops intel_pm = {
 	SET_RUNTIME_PM_OPS(intel_suspend_runtime, intel_resume_runtime, NULL)
 };
 
-static struct platform_driver sdw_intel_drv = {
-	.probe = intel_master_probe,
-	.remove = intel_master_remove,
+static const struct auxiliary_device_id intel_link_id_table[] = {
+	{ .name = "soundwire_intel.link" },
+	{},
+};
+MODULE_DEVICE_TABLE(auxiliary, intel_link_id_table);
+
+static struct auxiliary_driver sdw_intel_drv = {
+	.probe = intel_link_probe,
+	.remove = intel_link_remove,
 	.driver = {
-		.name = "intel-sdw",
+		/* auxiliary_driver_register() sets .name to be the modname */
 		.pm = &intel_pm,
-	}
+	},
+	.id_table = intel_link_id_table
 };
-
-module_platform_driver(sdw_intel_drv);
+module_auxiliary_driver(sdw_intel_drv);
 
 MODULE_LICENSE("Dual BSD/GPL");
-MODULE_ALIAS("platform:intel-sdw");
-MODULE_DESCRIPTION("Intel Soundwire Master Driver");
+MODULE_DESCRIPTION("Intel Soundwire Link Driver");
diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h
index 06bac8ba14e9..0b47b148da3f 100644
--- a/drivers/soundwire/intel.h
+++ b/drivers/soundwire/intel.h
@@ -7,7 +7,6 @@
 /**
  * struct sdw_intel_link_res - Soundwire Intel link resource structure,
  * typically populated by the controller driver.
- * @pdev: platform_device
  * @mmio_base: mmio base of SoundWire registers
  * @registers: Link IO registers base
  * @shim: Audio shim pointer
@@ -23,7 +22,6 @@
  * @list: used to walk-through all masters exposed by the same controller
  */
 struct sdw_intel_link_res {
-	struct platform_device *pdev;
 	void __iomem *mmio_base; /* not strictly needed, useful for debug */
 	void __iomem *registers;
 	void __iomem *shim;
@@ -48,7 +46,15 @@ struct sdw_intel {
 #endif
 };
 
-int intel_master_startup(struct platform_device *pdev);
-int intel_master_process_wakeen_event(struct platform_device *pdev);
+int intel_link_startup(struct auxiliary_device *auxdev);
+int intel_link_process_wakeen_event(struct auxiliary_device *auxdev);
+
+struct sdw_intel_link_dev {
+	struct auxiliary_device auxdev;
+	struct sdw_intel_link_res link_res;
+};
+
+#define auxiliary_dev_to_sdw_intel_link_dev(auxiliary_dev) \
+	container_of(auxiliary_dev, struct sdw_intel_link_dev, auxdev)
 
 #endif /* __SDW_INTEL_LOCAL_H */
diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
index 30ce95ec2d70..9e283bef53d2 100644
--- a/drivers/soundwire/intel_init.c
+++ b/drivers/soundwire/intel_init.c
@@ -12,7 +12,7 @@
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/module.h>
-#include <linux/platform_device.h>
+#include <linux/auxiliary_bus.h>
 #include <linux/pm_runtime.h>
 #include <linux/soundwire/sdw_intel.h>
 #include "cadence_master.h"
@@ -24,28 +24,108 @@
 #define SDW_LINK_BASE		0x30000
 #define SDW_LINK_SIZE		0x10000
 
+static void intel_link_dev_release(struct device *dev)
+{
+	struct auxiliary_device *auxdev = to_auxiliary_dev(dev);
+	struct sdw_intel_link_dev *ldev = auxiliary_dev_to_sdw_intel_link_dev(auxdev);
+
+	kfree(ldev);
+}
+
+/* alloc, init and add link devices */
+static struct sdw_intel_link_dev *intel_link_dev_register(struct sdw_intel_res *res,
+							  struct sdw_intel_ctx *ctx,
+							  struct fwnode_handle *fwnode,
+							  const char *name,
+							  int link_id)
+{
+	struct sdw_intel_link_dev *ldev;
+	struct sdw_intel_link_res *link;
+	struct auxiliary_device *auxdev;
+	int ret;
+
+	ldev = kzalloc(sizeof(*ldev), GFP_KERNEL);
+	if (!ldev)
+		return ERR_PTR(-ENOMEM);
+
+	auxdev = &ldev->auxdev;
+	auxdev->name = name;
+	auxdev->dev.parent = res->parent;
+	auxdev->dev.fwnode = fwnode;
+	auxdev->dev.release = intel_link_dev_release;
+
+	/* we don't use an IDA since we already have a link ID */
+	auxdev->id = link_id;
+
+	/*
+	 * keep a handle on the allocated memory, to be used in all other functions.
+	 * Since the same pattern is used to skip links that are not enabled, there is
+	 * no need to check if ctx->ldev[i] is NULL later on.
+	 */
+	ctx->ldev[link_id] = ldev;
+
+	/* Add link information used in the driver probe */
+	link = &ldev->link_res;
+	link->mmio_base = res->mmio_base;
+	link->registers = res->mmio_base + SDW_LINK_BASE
+		+ (SDW_LINK_SIZE * link_id);
+	link->shim = res->mmio_base + SDW_SHIM_BASE;
+	link->alh = res->mmio_base + SDW_ALH_BASE;
+
+	link->ops = res->ops;
+	link->dev = res->dev;
+
+	link->clock_stop_quirks = res->clock_stop_quirks;
+	link->shim_lock = &ctx->shim_lock;
+	link->shim_mask = &ctx->shim_mask;
+	link->link_mask = ctx->link_mask;
+
+	/* now follow the two-step init/add sequence */
+	ret = auxiliary_device_init(auxdev);
+	if (ret < 0) {
+		dev_err(res->parent, "failed to initialize link dev %s link_id %d\n",
+			name, link_id);
+		kfree(ldev);
+		return ERR_PTR(ret);
+	}
+
+	ret = auxiliary_device_add(&ldev->auxdev);
+	if (ret < 0) {
+		dev_err(res->parent, "failed to add link dev %s link_id %d\n",
+			ldev->auxdev.name, link_id);
+		/* ldev will be freed with the put_device() and .release sequence */
+		auxiliary_device_uninit(&ldev->auxdev);
+		return ERR_PTR(ret);
+	}
+
+	return ldev;
+}
+
+static void intel_link_dev_unregister(struct sdw_intel_link_dev *ldev)
+{
+	auxiliary_device_delete(&ldev->auxdev);
+	auxiliary_device_uninit(&ldev->auxdev);
+}
+
 static int sdw_intel_cleanup(struct sdw_intel_ctx *ctx)
 {
-	struct sdw_intel_link_res *link = ctx->links;
+	struct sdw_intel_link_dev *ldev;
 	u32 link_mask;
 	int i;
 
-	if (!link)
-		return 0;
-
 	link_mask = ctx->link_mask;
 
-	for (i = 0; i < ctx->count; i++, link++) {
+	for (i = 0; i < ctx->count; i++) {
 		if (!(link_mask & BIT(i)))
 			continue;
 
-		if (link->pdev) {
-			pm_runtime_disable(&link->pdev->dev);
-			platform_device_unregister(link->pdev);
-		}
+		ldev = ctx->ldev[i];
 
-		if (!link->clock_stop_quirks)
-			pm_runtime_put_noidle(link->dev);
+		pm_runtime_disable(&ldev->auxdev.dev);
+		if (!ldev->link_res.clock_stop_quirks)
+			pm_runtime_put_noidle(ldev->link_res.dev);
+
+		intel_link_dev_unregister(ldev);
 	}
 
 	return 0;
@@ -91,9 +171,8 @@ EXPORT_SYMBOL_NS(sdw_intel_thread, SOUNDWIRE_INTEL_INIT);
 static struct sdw_intel_ctx
 *sdw_intel_probe_controller(struct sdw_intel_res *res)
 {
-	struct platform_device_info pdevinfo;
-	struct platform_device *pdev;
 	struct sdw_intel_link_res *link;
+	struct sdw_intel_link_dev *ldev;
 	struct sdw_intel_ctx *ctx;
 	struct acpi_device *adev;
 	struct sdw_slave *slave;
@@ -116,67 +195,60 @@ static struct sdw_intel_ctx
 	count = res->count;
 	dev_dbg(&adev->dev, "Creating %d SDW Link devices\n", count);
 
-	ctx = devm_kzalloc(&adev->dev, sizeof(*ctx), GFP_KERNEL);
+	/*
+	 * we need to alloc/free memory manually and can't use devm:
+	 * this routine may be called from a workqueue, and not from
+	 * the parent .probe.
+	 * If devm_ was used, the memory might never be freed on errors.
+	 */
+	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 	if (!ctx)
 		return NULL;
 
 	ctx->count = count;
-	ctx->links = devm_kcalloc(&adev->dev, ctx->count,
-				  sizeof(*ctx->links), GFP_KERNEL);
-	if (!ctx->links)
+
+	/*
+	 * allocate the array of pointers. The link-specific data is allocated
+	 * as part of the first loop below and released with the auxiliary_device_uninit().
+	 * If some links are disabled, the link pointer will remain NULL. Given that the
+	 * number of links is small, this is simpler than using a list to keep track of links.
+	 */
+	ctx->ldev = kcalloc(ctx->count, sizeof(*ctx->ldev), GFP_KERNEL);
+	if (!ctx->ldev) {
+		kfree(ctx);
 		return NULL;
+	}
 
-	ctx->count = count;
 	ctx->mmio_base = res->mmio_base;
 	ctx->link_mask = res->link_mask;
 	ctx->handle = res->handle;
 	mutex_init(&ctx->shim_lock);
 
-	link = ctx->links;
 	link_mask = ctx->link_mask;
 
 	INIT_LIST_HEAD(&ctx->link_list);
 
-	/* Create SDW Master devices */
-	for (i = 0; i < count; i++, link++) {
-		if (!(link_mask & BIT(i))) {
-			dev_dbg(&adev->dev,
-				"Link %d masked, will not be enabled\n", i);
+	for (i = 0; i < count; i++) {
+		if (!(link_mask & BIT(i)))
 			continue;
-		}
 
-		link->mmio_base = res->mmio_base;
-		link->registers = res->mmio_base + SDW_LINK_BASE
-			+ (SDW_LINK_SIZE * i);
-		link->shim = res->mmio_base + SDW_SHIM_BASE;
-		link->alh = res->mmio_base + SDW_ALH_BASE;
-
-		link->ops = res->ops;
-		link->dev = res->dev;
-
-		link->clock_stop_quirks = res->clock_stop_quirks;
-		link->shim_lock = &ctx->shim_lock;
-		link->shim_mask = &ctx->shim_mask;
-		link->link_mask = link_mask;
-
-		memset(&pdevinfo, 0, sizeof(pdevinfo));
-
-		pdevinfo.parent = res->parent;
-		pdevinfo.name = "intel-sdw";
-		pdevinfo.id = i;
-		pdevinfo.fwnode = acpi_fwnode_handle(adev);
-		pdevinfo.data = link;
-		pdevinfo.size_data = sizeof(*link);
-
-		pdev = platform_device_register_full(&pdevinfo);
-		if (IS_ERR(pdev)) {
-			dev_err(&adev->dev,
-				"platform device creation failed: %ld\n",
-				PTR_ERR(pdev));
+		/*
+		 * init and add a device for each link
+		 *
+		 * The name of the device will be soundwire_intel.link.[i],
+		 * with the "soundwire_intel" module prefix automatically added
+		 * by the auxiliary bus core.
+		 */
+		ldev = intel_link_dev_register(res,
+					       ctx,
+					       acpi_fwnode_handle(adev),
+					       "link",
+					       i);
+		if (IS_ERR(ldev))
 			goto err;
-		}
-		link->pdev = pdev;
-		link->cdns = platform_get_drvdata(pdev);
+
+		link = &ldev->link_res;
+		link->cdns = dev_get_drvdata(&ldev->auxdev.dev);
 
 		if (!link->cdns) {
 			dev_err(&adev->dev, "failed to get link->cdns\n");
@@ -194,8 +266,7 @@ static struct sdw_intel_ctx
 			num_slaves++;
 	}
 
-	ctx->ids = devm_kcalloc(&adev->dev, num_slaves,
-				sizeof(*ctx->ids), GFP_KERNEL);
+	ctx->ids = kcalloc(num_slaves, sizeof(*ctx->ids), GFP_KERNEL);
 	if (!ctx->ids)
 		goto err;
 
@@ -213,8 +284,14 @@ static struct sdw_intel_ctx
 	return ctx;
 
 err:
-	ctx->count = i;
-	sdw_intel_cleanup(ctx);
+	while (i--) {
+		if (!(link_mask & BIT(i)))
+			continue;
+		ldev = ctx->ldev[i];
+		intel_link_dev_unregister(ldev);
+	}
+	kfree(ctx->ldev);
+	kfree(ctx);
 	return NULL;
 }
 
@@ -222,7 +299,7 @@ static int
 sdw_intel_startup_controller(struct sdw_intel_ctx *ctx)
 {
 	struct acpi_device *adev;
-	struct sdw_intel_link_res *link;
+	struct sdw_intel_link_dev *ldev;
 	u32 caps;
 	u32 link_mask;
 	int i;
@@ -241,27 +318,28 @@ sdw_intel_startup_controller(struct sdw_intel_ctx *ctx)
 		return -EINVAL;
 	}
 
-	if (!ctx->links)
+	if (!ctx->ldev)
 		return -EINVAL;
 
-	link = ctx->links;
 	link_mask = ctx->link_mask;
 
 	/* Startup SDW Master devices */
-	for (i = 0; i < ctx->count; i++, link++) {
+	for (i = 0; i < ctx->count; i++) {
 		if (!(link_mask & BIT(i)))
 			continue;
 
-		intel_master_startup(link->pdev);
+		ldev = ctx->ldev[i];
+
+		intel_link_startup(&ldev->auxdev);
 
-		if (!link->clock_stop_quirks) {
+		if (!ldev->link_res.clock_stop_quirks) {
 			/*
 			 * we need to prevent the parent PCI device
 			 * from entering pm_runtime suspend, so that
 			 * power rails to the SoundWire IP are not
 			 * turned off.
 			 */
-			pm_runtime_get_noresume(link->dev);
+			pm_runtime_get_noresume(ldev->link_res.dev);
 		}
 	}
 
@@ -272,8 +350,8 @@ sdw_intel_startup_controller(struct sdw_intel_ctx *ctx)
  * sdw_intel_probe() - SoundWire Intel probe routine
  * @res: resource data
  *
- * This registers a platform device for each Master handled by the controller,
- * and SoundWire Master and Slave devices will be created by the platform
+ * This registers an auxiliary device for each Master handled by the controller,
+ * and SoundWire Master and Slave devices will be created by the auxiliary
  * device probe. All the information necessary is stored in the context, and
  * the res argument pointer can be freed after this step.
  * This function will be called after sdw_intel_acpi_scan() by SOF probe.
@@ -306,27 +384,31 @@ EXPORT_SYMBOL_NS(sdw_intel_startup, SOUNDWIRE_INTEL_INIT);
 void sdw_intel_exit(struct sdw_intel_ctx *ctx)
 {
 	sdw_intel_cleanup(ctx);
+	kfree(ctx->ids);
+	kfree(ctx->ldev);
+	kfree(ctx);
 }
 EXPORT_SYMBOL_NS(sdw_intel_exit, SOUNDWIRE_INTEL_INIT);
 
 void sdw_intel_process_wakeen_event(struct sdw_intel_ctx *ctx)
 {
-	struct sdw_intel_link_res *link;
+	struct sdw_intel_link_dev *ldev;
 	u32 link_mask;
 	int i;
 
-	if (!ctx->links)
+	if (!ctx->ldev)
 		return;
 
-	link = ctx->links;
 	link_mask = ctx->link_mask;
 
 	/* Startup SDW Master devices */
-	for (i = 0; i < ctx->count; i++, link++) {
+	for (i = 0; i < ctx->count; i++) {
 		if (!(link_mask & BIT(i)))
 			continue;
 
-		intel_master_process_wakeen_event(link->pdev);
+		ldev = ctx->ldev[i];
+
+		intel_link_process_wakeen_event(&ldev->auxdev);
 	}
 }
 EXPORT_SYMBOL_NS(sdw_intel_process_wakeen_event, SOUNDWIRE_INTEL_INIT);
diff --git a/drivers/soundwire/slave.c b/drivers/soundwire/slave.c
index 0eed38a79c6d..669d7573320b 100644
--- a/drivers/soundwire/slave.c
+++ b/drivers/soundwire/slave.c
@@ -39,12 +39,12 @@ int sdw_slave_add(struct sdw_bus *bus,
 
 	if (id->unique_id == SDW_IGNORED_UNIQUE_ID) {
 		/* name shall be sdw:link:mfg:part:class */
-		dev_set_name(&slave->dev, "sdw:%x:%x:%x:%x",
+		dev_set_name(&slave->dev, "sdw:%01x:%04x:%04x:%02x",
 			     bus->link_id, id->mfg_id, id->part_id,
 			     id->class_id);
 	} else {
 		/* name shall be sdw:link:mfg:part:class:unique */
-		dev_set_name(&slave->dev, "sdw:%x:%x:%x:%x:%x",
+		dev_set_name(&slave->dev, "sdw:%01x:%04x:%04x:%02x:%01x",
 			     bus->link_id, id->mfg_id, id->part_id,
 			     id->class_id, id->unique_id);
 	}
diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index 1eaedaaba094..1a18308f4ef4 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -422,7 +422,6 @@ static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus,
 	struct completion *port_ready;
 	struct sdw_dpn_prop *dpn_prop;
 	struct sdw_prepare_ch prep_ch;
-	unsigned int time_left;
 	bool intr = false;
 	int ret = 0, val;
 	u32 addr;
@@ -479,15 +478,15 @@ static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus,
 
 		/* Wait for completion on port ready */
 		port_ready = &s_rt->slave->port_ready[prep_ch.num];
-		time_left = wait_for_completion_timeout(port_ready,
-				msecs_to_jiffies(dpn_prop->ch_prep_timeout));
+		wait_for_completion_timeout(port_ready,
+			msecs_to_jiffies(dpn_prop->ch_prep_timeout));
 
 		val = sdw_read(s_rt->slave, SDW_DPN_PREPARESTATUS(p_rt->num));
-		val &= p_rt->ch_mask;
-		if (!time_left || val) {
+		if ((val < 0) || (val & p_rt->ch_mask)) {
+			ret = (val < 0) ? val : -ETIMEDOUT;
 			dev_err(&s_rt->slave->dev,
-				"Chn prep failed for port:%d\n", prep_ch.num);
-			return -ETIMEDOUT;
+				"Chn prep failed for port %d: %d\n", prep_ch.num, ret);
+			return ret;
 		}
 	}