[PATCH 0/2] Add single core R5F IPC for AM62 SoC family

[PATCH 0/2] Add single core R5F IPC for AM62 SoC family

[Devarsh Thakkar]

AM62 SoC family don't have a R5F cluster, instead they have a single
core R5F. This enables IPC support with single core R5F for AM62
family of SoCs.

Devarsh Thakkar (2):
  Documentation: dt-bindings: k3-r5f-rproc: Add new compatible for AM62
    SoC family
  remoteproc: k3-r5: Use separate compatible string for TI AM62 SoC
    family

 .../bindings/remoteproc/ti,k3-r5f-rproc.yaml  | 48 +++++++++++-----
 drivers/remoteproc/ti_k3_r5_remoteproc.c      | 55 +++++++++++++++----
 2 files changed, 77 insertions(+), 26 deletions(-)

-- 
2.17.1

[PATCH 1/2] Documentation: dt-bindings: k3-r5f-rproc: Add new compatible for AM62 SoC family

[Devarsh Thakkar]

AM62 family of devices don't have a R5F cluster, instead
they have single core DM R5F.
Add new compatible string ti,am62-r5fss to support this scenario.

When this new compatible is used don't allow cluster-mode
property usage in device-tree as this implies that there
is no R5F cluster available and only single R5F core
is present.

Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
---
 .../bindings/remoteproc/ti,k3-r5f-rproc.yaml  | 48 +++++++++++++------
 1 file changed, 34 insertions(+), 14 deletions(-)

diff --git a/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml
index fb9605f0655b..1f5eae806c2f 100644
--- a/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml
@@ -21,6 +21,9 @@ description: |
   called "Single-CPU" mode, where only Core0 is used, but with ability to use
   Core1's TCMs as well.
 
+  AM62 SoC family support a single R5F core only which is used for DM firmware
+  and can also be used as a remote processor with IPC communication.
+
   Each Dual-Core R5F sub-system is represented as a single DTS node
   representing the cluster, with a pair of child DT nodes representing
   the individual R5F cores. Each node has a number of required or optional
@@ -28,6 +31,9 @@ description: |
   the device management of the remote processor and to communicate with the
   remote processor.
 
+  Since AM62 SoC family only support a single core, there is no cluster-mode
+  property setting required for it.
+
 properties:
   $nodename:
     pattern: "^r5fss(@.*)?"
@@ -38,6 +44,7 @@ properties:
       - ti,j721e-r5fss
       - ti,j7200-r5fss
       - ti,am64-r5fss
+      - ti,am62-r5fss
       - ti,j721s2-r5fss
 
   power-domains:
@@ -80,7 +87,8 @@ patternProperties:
       node representing a TI instantiation of the Arm Cortex R5F core. There
       are some specific integration differences for the IP like the usage of
       a Region Address Translator (RAT) for translating the larger SoC bus
-      addresses into a 32-bit address space for the processor.
+      addresses into a 32-bit address space for the processor. For AM62x,
+      should only define one R5F child node as it has only one core available.
 
       Each R5F core has an associated 64 KB of Tightly-Coupled Memory (TCM)
       internal memories split between two banks - TCMA and TCMB (further
@@ -104,6 +112,7 @@ patternProperties:
           - ti,j721e-r5f
           - ti,j7200-r5f
           - ti,am64-r5f
+          - ti,am62-r5f
           - ti,j721s2-r5f
 
       reg:
@@ -207,20 +216,31 @@ patternProperties:
       - firmware-name
 
     unevaluatedProperties: false
+allOf:
+  - if:
+      properties:
+        compatible:
+          enum:
+            - ti,am64-r5fss
+    then:
+      properties:
+        ti,cluster-mode:
+          enum: [0, 2]
+
+    else:
+      properties:
+        ti,cluster-mode:
+          enum: [0, 1]
+
+  - if:
+      properties:
+        compatible:
+          enum:
+            - ti,am62-r5fss
+    then:
+      properties:
+        ti,cluster-mode: false
 
-if:
-  properties:
-    compatible:
-      enum:
-        - ti,am64-r5fss
-then:
-  properties:
-    ti,cluster-mode:
-      enum: [0, 2]
-else:
-  properties:
-    ti,cluster-mode:
-      enum: [0, 1]
 
 required:
   - compatible
-- 
2.17.1

[PATCH 2/2] remoteproc: k3-r5: Use separate compatible string for TI AM62 SoC family

[Devarsh Thakkar]

AM62 and AM62A SoCs use single core R5F which is a new scenario
different than the one being used with CLUSTER_MODE_SINGLECPU
which is for utilizing a single core from a set of cores available
in R5F cluster present in the SoC.

To support this single core scenario map it with
newly defined CLUSTER_MODE_NONE and use it when
compatible is set to ti,am62-r5fss.

Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
---
 drivers/remoteproc/ti_k3_r5_remoteproc.c | 55 ++++++++++++++++++------
 1 file changed, 43 insertions(+), 12 deletions(-)

diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c
index 0481926c6975..b5adcaa3d3a4 100644
--- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
@@ -74,11 +74,13 @@ struct k3_r5_mem {
  *   Split mode      : AM65x, J721E, J7200 and AM64x SoCs
  *   LockStep mode   : AM65x, J721E and J7200 SoCs
  *   Single-CPU mode : AM64x SoCs only
+ *   None            : AM62x, AM62A SoCs
  */
 enum cluster_mode {
 	CLUSTER_MODE_SPLIT = 0,
 	CLUSTER_MODE_LOCKSTEP,
 	CLUSTER_MODE_SINGLECPU,
+	CLUSTER_MODE_NONE,
 };
 
 /**
@@ -86,11 +88,13 @@ enum cluster_mode {
  * @tcm_is_double: flag to denote the larger unified TCMs in certain modes
  * @tcm_ecc_autoinit: flag to denote the auto-initialization of TCMs for ECC
  * @single_cpu_mode: flag to denote if SoC/IP supports Single-CPU mode
+ * @is_single_core: flag to denote if SoC/IP has only single core R5
  */
 struct k3_r5_soc_data {
 	bool tcm_is_double;
 	bool tcm_ecc_autoinit;
 	bool single_cpu_mode;
+	bool is_single_core;
 };
 
 /**
@@ -838,7 +842,8 @@ static int k3_r5_rproc_configure(struct k3_r5_rproc *kproc)
 
 	core0 = list_first_entry(&cluster->cores, struct k3_r5_core, elem);
 	if (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
-	    cluster->mode == CLUSTER_MODE_SINGLECPU) {
+	    cluster->mode == CLUSTER_MODE_SINGLECPU ||
+		cluster->mode == CLUSTER_MODE_NONE) {
 		core = core0;
 	} else {
 		core = kproc->core;
@@ -853,7 +858,7 @@ static int k3_r5_rproc_configure(struct k3_r5_rproc *kproc)
 		boot_vec, cfg, ctrl, stat);
 
 	/* check if only Single-CPU mode is supported on applicable SoCs */
-	if (cluster->soc_data->single_cpu_mode) {
+	if (cluster->soc_data->single_cpu_mode || cluster->soc_data->is_single_core) {
 		single_cpu =
 			!!(stat & PROC_BOOT_STATUS_FLAG_R5_SINGLECORE_ONLY);
 		if (single_cpu && cluster->mode == CLUSTER_MODE_SPLIT) {
@@ -1074,6 +1079,7 @@ static void k3_r5_adjust_tcm_sizes(struct k3_r5_rproc *kproc)
 
 	if (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
 	    cluster->mode == CLUSTER_MODE_SINGLECPU ||
+		cluster->mode == CLUSTER_MODE_NONE ||
 	    !cluster->soc_data->tcm_is_double)
 		return;
 
@@ -1147,7 +1153,9 @@ static int k3_r5_rproc_configure_mode(struct k3_r5_rproc *kproc)
 	atcm_enable = cfg & PROC_BOOT_CFG_FLAG_R5_ATCM_EN ?  1 : 0;
 	btcm_enable = cfg & PROC_BOOT_CFG_FLAG_R5_BTCM_EN ?  1 : 0;
 	loczrama = cfg & PROC_BOOT_CFG_FLAG_R5_TCM_RSTBASE ?  1 : 0;
-	if (cluster->soc_data->single_cpu_mode) {
+	if (cluster->soc_data->is_single_core) {
+		mode = CLUSTER_MODE_NONE;
+	} else if (cluster->soc_data->single_cpu_mode) {
 		mode = cfg & PROC_BOOT_CFG_FLAG_R5_SINGLE_CORE ?
 				CLUSTER_MODE_SINGLECPU : CLUSTER_MODE_SPLIT;
 	} else {
@@ -1271,6 +1279,7 @@ static int k3_r5_cluster_rproc_init(struct platform_device *pdev)
 
 		/* create only one rproc in lockstep mode or single-cpu mode */
 		if (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
+			cluster->mode == CLUSTER_MODE_NONE     ||
 		    cluster->mode == CLUSTER_MODE_SINGLECPU)
 			break;
 	}
@@ -1704,21 +1713,32 @@ static int k3_r5_probe(struct platform_device *pdev)
 	 * default to most common efuse configurations - Split-mode on AM64x
 	 * and LockStep-mode on all others
 	 */
-	cluster->mode = data->single_cpu_mode ?
-				CLUSTER_MODE_SPLIT : CLUSTER_MODE_LOCKSTEP;
+	if (!data->is_single_core)
+		cluster->mode = data->single_cpu_mode ?
+						CLUSTER_MODE_SPLIT : CLUSTER_MODE_LOCKSTEP;
+	else
+		cluster->mode = CLUSTER_MODE_NONE;
+
 	cluster->soc_data = data;
 	INIT_LIST_HEAD(&cluster->cores);
 
-	ret = of_property_read_u32(np, "ti,cluster-mode", &cluster->mode);
-	if (ret < 0 && ret != -EINVAL) {
-		dev_err(dev, "invalid format for ti,cluster-mode, ret = %d\n",
-			ret);
-		return ret;
+	if (!data->is_single_core) {
+		ret = of_property_read_u32(np, "ti,cluster-mode", &cluster->mode);
+		if (ret < 0 && ret != -EINVAL) {
+			dev_err(dev, "invalid format for ti,cluster-mode, ret = %d\n", ret);
+			return ret;
+		}
 	}
 
 	num_cores = of_get_available_child_count(np);
-	if (num_cores != 2) {
-		dev_err(dev, "MCU cluster requires both R5F cores to be enabled, num_cores = %d\n",
+	if (num_cores != 2 && !data->is_single_core) {
+		dev_err(dev, "MCU cluster requires both R5F cores to be enabled but num_cores is set to = %d\n",
+			num_cores);
+		return -ENODEV;
+	}
+
+	if (num_cores != 1 && data->is_single_core) {
+		dev_err(dev, "SoC supports only single core R5 but num_cores is set to %d\n",
 			num_cores);
 		return -ENODEV;
 	}
@@ -1760,18 +1780,28 @@ static const struct k3_r5_soc_data am65_j721e_soc_data = {
 	.tcm_is_double = false,
 	.tcm_ecc_autoinit = false,
 	.single_cpu_mode = false,
+	.is_single_core = false,
 };
 
 static const struct k3_r5_soc_data j7200_j721s2_soc_data = {
 	.tcm_is_double = true,
 	.tcm_ecc_autoinit = true,
 	.single_cpu_mode = false,
+	.is_single_core = false,
 };
 
 static const struct k3_r5_soc_data am64_soc_data = {
 	.tcm_is_double = true,
 	.tcm_ecc_autoinit = true,
 	.single_cpu_mode = true,
+	.is_single_core = false,
+};
+
+static const struct k3_r5_soc_data am62_soc_data = {
+	.tcm_is_double = false,
+	.tcm_ecc_autoinit = true,
+	.single_cpu_mode = false,
+	.is_single_core = true,
 };
 
 static const struct of_device_id k3_r5_of_match[] = {
@@ -1779,6 +1809,7 @@ static const struct of_device_id k3_r5_of_match[] = {
 	{ .compatible = "ti,j721e-r5fss", .data = &am65_j721e_soc_data, },
 	{ .compatible = "ti,j7200-r5fss", .data = &j7200_j721s2_soc_data, },
 	{ .compatible = "ti,am64-r5fss",  .data = &am64_soc_data, },
+	{ .compatible = "ti,am62-r5fss",  .data = &am62_soc_data, },
 	{ .compatible = "ti,j721s2-r5fss",  .data = &j7200_j721s2_soc_data, },
 	{ /* sentinel */ },
 };
-- 
2.17.1

Re: [PATCH 2/2] remoteproc: k3-r5: Use separate compatible string for TI AM62 SoC family

[Mathieu Poirier]

Hi Devarsh,

On Tue, Nov 15, 2022 at 11:39:34AM +0530, Devarsh Thakkar wrote:
> AM62 and AM62A SoCs use single core R5F which is a new scenario
> different than the one being used with CLUSTER_MODE_SINGLECPU
> which is for utilizing a single core from a set of cores available
> in R5F cluster present in the SoC.
> 
> To support this single core scenario map it with
> newly defined CLUSTER_MODE_NONE and use it when
> compatible is set to ti,am62-r5fss.
> 
> Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
> ---
>  drivers/remoteproc/ti_k3_r5_remoteproc.c | 55 ++++++++++++++++++------
>  1 file changed, 43 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c
> index 0481926c6975..b5adcaa3d3a4 100644
> --- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
> +++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
> @@ -74,11 +74,13 @@ struct k3_r5_mem {
>   *   Split mode      : AM65x, J721E, J7200 and AM64x SoCs
>   *   LockStep mode   : AM65x, J721E and J7200 SoCs
>   *   Single-CPU mode : AM64x SoCs only
> + *   None            : AM62x, AM62A SoCs
>   */
>  enum cluster_mode {
>  	CLUSTER_MODE_SPLIT = 0,
>  	CLUSTER_MODE_LOCKSTEP,
>  	CLUSTER_MODE_SINGLECPU,
> +	CLUSTER_MODE_NONE,
>  };
>  
>  /**
> @@ -86,11 +88,13 @@ enum cluster_mode {
>   * @tcm_is_double: flag to denote the larger unified TCMs in certain modes
>   * @tcm_ecc_autoinit: flag to denote the auto-initialization of TCMs for ECC
>   * @single_cpu_mode: flag to denote if SoC/IP supports Single-CPU mode
> + * @is_single_core: flag to denote if SoC/IP has only single core R5
>   */
>  struct k3_r5_soc_data {
>  	bool tcm_is_double;
>  	bool tcm_ecc_autoinit;
>  	bool single_cpu_mode;
> +	bool is_single_core;
>  };
>  
>  /**
> @@ -838,7 +842,8 @@ static int k3_r5_rproc_configure(struct k3_r5_rproc *kproc)
>  
>  	core0 = list_first_entry(&cluster->cores, struct k3_r5_core, elem);
>  	if (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
> -	    cluster->mode == CLUSTER_MODE_SINGLECPU) {
> +	    cluster->mode == CLUSTER_MODE_SINGLECPU ||
> +		cluster->mode == CLUSTER_MODE_NONE) {

Indentation problem.  


>  		core = core0;
>  	} else {
>  		core = kproc->core;
> @@ -853,7 +858,7 @@ static int k3_r5_rproc_configure(struct k3_r5_rproc *kproc)
>  		boot_vec, cfg, ctrl, stat);
>  
>  	/* check if only Single-CPU mode is supported on applicable SoCs */
> -	if (cluster->soc_data->single_cpu_mode) {
> +	if (cluster->soc_data->single_cpu_mode || cluster->soc_data->is_single_core) {
>  		single_cpu =
>  			!!(stat & PROC_BOOT_STATUS_FLAG_R5_SINGLECORE_ONLY);
>  		if (single_cpu && cluster->mode == CLUSTER_MODE_SPLIT) {
> @@ -1074,6 +1079,7 @@ static void k3_r5_adjust_tcm_sizes(struct k3_r5_rproc *kproc)
>  
>  	if (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
>  	    cluster->mode == CLUSTER_MODE_SINGLECPU ||
> +		cluster->mode == CLUSTER_MODE_NONE ||

Indentation problem.

>  	    !cluster->soc_data->tcm_is_double)
>  		return;
>  
> @@ -1147,7 +1153,9 @@ static int k3_r5_rproc_configure_mode(struct k3_r5_rproc *kproc)
>  	atcm_enable = cfg & PROC_BOOT_CFG_FLAG_R5_ATCM_EN ?  1 : 0;
>  	btcm_enable = cfg & PROC_BOOT_CFG_FLAG_R5_BTCM_EN ?  1 : 0;
>  	loczrama = cfg & PROC_BOOT_CFG_FLAG_R5_TCM_RSTBASE ?  1 : 0;
> -	if (cluster->soc_data->single_cpu_mode) {
> +	if (cluster->soc_data->is_single_core) {
> +		mode = CLUSTER_MODE_NONE;
> +	} else if (cluster->soc_data->single_cpu_mode) {
>  		mode = cfg & PROC_BOOT_CFG_FLAG_R5_SINGLE_CORE ?
>  				CLUSTER_MODE_SINGLECPU : CLUSTER_MODE_SPLIT;
>  	} else {
> @@ -1271,6 +1279,7 @@ static int k3_r5_cluster_rproc_init(struct platform_device *pdev)
>  
>  		/* create only one rproc in lockstep mode or single-cpu mode */
>  		if (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
> +			cluster->mode == CLUSTER_MODE_NONE     ||

Indentation problem.

Also, CLUSTER_MODE_NONE should be after CLUSTER_MODE_SINGLECPU as you did in
k3_r5_adjust_tcm_sizes().

>  		    cluster->mode == CLUSTER_MODE_SINGLECPU)
>  			break;
>  	}
> @@ -1704,21 +1713,32 @@ static int k3_r5_probe(struct platform_device *pdev)
>  	 * default to most common efuse configurations - Split-mode on AM64x
>  	 * and LockStep-mode on all others
>  	 */
> -	cluster->mode = data->single_cpu_mode ?
> -				CLUSTER_MODE_SPLIT : CLUSTER_MODE_LOCKSTEP;
> +	if (!data->is_single_core)
> +		cluster->mode = data->single_cpu_mode ?
> +						CLUSTER_MODE_SPLIT : CLUSTER_MODE_LOCKSTEP;

Indentation problem - the 'C' should be aligned with the 'd' on the previous
line.


> +	else
> +		cluster->mode = CLUSTER_MODE_NONE;
> +
>  	cluster->soc_data = data;
>  	INIT_LIST_HEAD(&cluster->cores);
>  
> -	ret = of_property_read_u32(np, "ti,cluster-mode", &cluster->mode);
> -	if (ret < 0 && ret != -EINVAL) {
> -		dev_err(dev, "invalid format for ti,cluster-mode, ret = %d\n",
> -			ret);
> -		return ret;
> +	if (!data->is_single_core) {
> +		ret = of_property_read_u32(np, "ti,cluster-mode", &cluster->mode);
> +		if (ret < 0 && ret != -EINVAL) {
> +			dev_err(dev, "invalid format for ti,cluster-mode, ret = %d\n", ret);
> +			return ret;
> +		}
>  	}
>  
>  	num_cores = of_get_available_child_count(np);
> -	if (num_cores != 2) {
> -		dev_err(dev, "MCU cluster requires both R5F cores to be enabled, num_cores = %d\n",
> +	if (num_cores != 2 && !data->is_single_core) {
> +		dev_err(dev, "MCU cluster requires both R5F cores to be enabled but num_cores is set to = %d\n",
> +			num_cores);
> +		return -ENODEV;
> +	}
> +
> +	if (num_cores != 1 && data->is_single_core) {
> +		dev_err(dev, "SoC supports only single core R5 but num_cores is set to %d\n",
>  			num_cores);
>  		return -ENODEV;
>  	}
> @@ -1760,18 +1780,28 @@ static const struct k3_r5_soc_data am65_j721e_soc_data = {
>  	.tcm_is_double = false,
>  	.tcm_ecc_autoinit = false,
>  	.single_cpu_mode = false,
> +	.is_single_core = false,
>  };
>  
>  static const struct k3_r5_soc_data j7200_j721s2_soc_data = {
>  	.tcm_is_double = true,
>  	.tcm_ecc_autoinit = true,
>  	.single_cpu_mode = false,
> +	.is_single_core = false,
>  };
>  
>  static const struct k3_r5_soc_data am64_soc_data = {
>  	.tcm_is_double = true,
>  	.tcm_ecc_autoinit = true,
>  	.single_cpu_mode = true,
> +	.is_single_core = false,
> +};
> +
> +static const struct k3_r5_soc_data am62_soc_data = {
> +	.tcm_is_double = false,
> +	.tcm_ecc_autoinit = true,
> +	.single_cpu_mode = false,
> +	.is_single_core = true,
>  };
>  
>  static const struct of_device_id k3_r5_of_match[] = {
> @@ -1779,6 +1809,7 @@ static const struct of_device_id k3_r5_of_match[] = {
>  	{ .compatible = "ti,j721e-r5fss", .data = &am65_j721e_soc_data, },
>  	{ .compatible = "ti,j7200-r5fss", .data = &j7200_j721s2_soc_data, },
>  	{ .compatible = "ti,am64-r5fss",  .data = &am64_soc_data, },
> +	{ .compatible = "ti,am62-r5fss",  .data = &am62_soc_data, },
>  	{ .compatible = "ti,j721s2-r5fss",  .data = &j7200_j721s2_soc_data, },
>  	{ /* sentinel */ },
>  };
> -- 
> 2.17.1
> 

Re: [PATCH 1/2] Documentation: dt-bindings: k3-r5f-rproc: Add new compatible for AM62 SoC family

[Mathieu Poirier]

The DT people need to ack this patch, and for that to happen they need to be
CC'ed on the patch, as checkpatch is explicitly instructing to do.

On Tue, Nov 15, 2022 at 11:39:33AM +0530, Devarsh Thakkar wrote:
> AM62 family of devices don't have a R5F cluster, instead
> they have single core DM R5F.
> Add new compatible string ti,am62-r5fss to support this scenario.
> 
> When this new compatible is used don't allow cluster-mode
> property usage in device-tree as this implies that there
> is no R5F cluster available and only single R5F core
> is present.
> 
> Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
> ---
>  .../bindings/remoteproc/ti,k3-r5f-rproc.yaml  | 48 +++++++++++++------
>  1 file changed, 34 insertions(+), 14 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml
> index fb9605f0655b..1f5eae806c2f 100644
> --- a/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml
> +++ b/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml
> @@ -21,6 +21,9 @@ description: |
>    called "Single-CPU" mode, where only Core0 is used, but with ability to use
>    Core1's TCMs as well.
>  
> +  AM62 SoC family support a single R5F core only which is used for DM firmware
> +  and can also be used as a remote processor with IPC communication.
> +
>    Each Dual-Core R5F sub-system is represented as a single DTS node
>    representing the cluster, with a pair of child DT nodes representing
>    the individual R5F cores. Each node has a number of required or optional
> @@ -28,6 +31,9 @@ description: |
>    the device management of the remote processor and to communicate with the
>    remote processor.
>  
> +  Since AM62 SoC family only support a single core, there is no cluster-mode
> +  property setting required for it.
> +
>  properties:
>    $nodename:
>      pattern: "^r5fss(@.*)?"
> @@ -38,6 +44,7 @@ properties:
>        - ti,j721e-r5fss
>        - ti,j7200-r5fss
>        - ti,am64-r5fss
> +      - ti,am62-r5fss
>        - ti,j721s2-r5fss
>  
>    power-domains:
> @@ -80,7 +87,8 @@ patternProperties:
>        node representing a TI instantiation of the Arm Cortex R5F core. There
>        are some specific integration differences for the IP like the usage of
>        a Region Address Translator (RAT) for translating the larger SoC bus
> -      addresses into a 32-bit address space for the processor.
> +      addresses into a 32-bit address space for the processor. For AM62x,
> +      should only define one R5F child node as it has only one core available.
>  
>        Each R5F core has an associated 64 KB of Tightly-Coupled Memory (TCM)
>        internal memories split between two banks - TCMA and TCMB (further
> @@ -104,6 +112,7 @@ patternProperties:
>            - ti,j721e-r5f
>            - ti,j7200-r5f
>            - ti,am64-r5f
> +          - ti,am62-r5f
>            - ti,j721s2-r5f
>  
>        reg:
> @@ -207,20 +216,31 @@ patternProperties:
>        - firmware-name
>  
>      unevaluatedProperties: false
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          enum:
> +            - ti,am64-r5fss
> +    then:
> +      properties:
> +        ti,cluster-mode:
> +          enum: [0, 2]
> +
> +    else:
> +      properties:
> +        ti,cluster-mode:
> +          enum: [0, 1]
> +
> +  - if:
> +      properties:
> +        compatible:
> +          enum:
> +            - ti,am62-r5fss
> +    then:
> +      properties:
> +        ti,cluster-mode: false
>  
> -if:
> -  properties:
> -    compatible:
> -      enum:
> -        - ti,am64-r5fss
> -then:
> -  properties:
> -    ti,cluster-mode:
> -      enum: [0, 2]
> -else:
> -  properties:
> -    ti,cluster-mode:
> -      enum: [0, 1]
>  
>  required:
>    - compatible
> -- 
> 2.17.1
>