[PATCH v2 0/4] dt-bindings: soc: smem: Make indirection optional

[PATCH v2 0/4] dt-bindings: soc: smem: Make indirection optional

[Bjorn Andersson]

In the modern Qualcomm platform there's no reason for having smem as a
separate node, so let's change this.

Bjorn Andersson (4):
  dt-bindings: sram: Document qcom,rpm-msg-ram
  dt-bindings: soc: smem: Make indirection optional
  soc: qcom: smem: Support reserved-memory description
  arm64: dts: qcom: sdm845: Drop standalone smem node

 .../bindings/soc/qcom/qcom,smem.yaml          | 34 +++++++++--
 .../devicetree/bindings/sram/sram.yaml        |  5 +-
 arch/arm64/boot/dts/qcom/sdm845.dtsi          | 10 +---
 drivers/of/platform.c                         |  1 +
 drivers/soc/qcom/smem.c                       | 57 +++++++++++++------
 5 files changed, 77 insertions(+), 30 deletions(-)

-- 
2.29.2

[PATCH v2 1/4] dt-bindings: sram: Document qcom,rpm-msg-ram

[Bjorn Andersson]

The Qualcomm SMEM binding always depended on a reference to a SRAM node
of compatible "qcom,rpm-msg-ram", document this as part of the SRAM
binding.

The SRAM is consumed as a whole and not split up using subnodes, so
properties related to this are not required.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---

Changes since v1:
- New patch, to resolve issue with the existing qcom,smem example

 Documentation/devicetree/bindings/sram/sram.yaml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/sram/sram.yaml b/Documentation/devicetree/bindings/sram/sram.yaml
index 3eda5049d183..e3311b54db33 100644
--- a/Documentation/devicetree/bindings/sram/sram.yaml
+++ b/Documentation/devicetree/bindings/sram/sram.yaml
@@ -31,6 +31,7 @@ properties:
         - amlogic,meson-gxbb-sram
         - arm,juno-sram-ns
         - atmel,sama5d2-securam
+        - qcom,rpm-msg-ram
         - rockchip,rk3288-pmu-sram
 
   reg:
@@ -135,7 +136,9 @@ if:
   properties:
     compatible:
       contains:
-        const: rockchip,rk3288-pmu-sram
+        enum:
+          - qcom,rpm-msg-ram
+          - rockchip,rk3288-pmu-sram
 
 else:
   required:
-- 
2.29.2

[PATCH v2 2/4] dt-bindings: soc: smem: Make indirection optional

[Bjorn Andersson]

In the olden days the Qualcomm shared memory (SMEM) region consisted of
multiple chunks of memory, so SMEM was described as a standalone node
with references to its various memory regions.

But practically all modern Qualcomm platforms has a single reserved memory
region used for SMEM. So rather than having to use two nodes to describe
the one SMEM region, update the binding to allow the reserved-memory
region alone to describe SMEM.

The olden format is preserved as valid, as this is widely used already.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---

Changes since v1:
- None

 .../bindings/soc/qcom/qcom,smem.yaml          | 34 ++++++++++++++++---
 1 file changed, 30 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,smem.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,smem.yaml
index f7e17713b3d8..4149cf2b66be 100644
--- a/Documentation/devicetree/bindings/soc/qcom/qcom,smem.yaml
+++ b/Documentation/devicetree/bindings/soc/qcom/qcom,smem.yaml
@@ -10,14 +10,18 @@ maintainers:
   - Andy Gross <agross@kernel.org>
   - Bjorn Andersson <bjorn.andersson@linaro.org>
 
-description: |
-  This binding describes the Qualcomm Shared Memory Manager, used to share data
-  between various subsystems and OSes in Qualcomm platforms.
+description:
+  This binding describes the Qualcomm Shared Memory Manager, a region of
+  reserved-memory used to share data between various subsystems and OSes in
+  Qualcomm platforms.
 
 properties:
   compatible:
     const: qcom,smem
 
+  reg:
+    maxItems: 1
+
   memory-region:
     maxItems: 1
     description: handle to memory reservation for main SMEM memory region.
@@ -29,11 +33,19 @@ properties:
     $ref: /schemas/types.yaml#/definitions/phandle
     description: handle to RPM message memory resource
 
+  no-map: true
+
 required:
   - compatible
-  - memory-region
   - hwlocks
 
+oneOf:
+  - required:
+      - reg
+      - no-map
+  - required:
+      - memory-region
+
 additionalProperties: false
 
 examples:
@@ -43,6 +55,20 @@ examples:
         #size-cells = <1>;
         ranges;
 
+        smem@fa00000 {
+            compatible = "qcom,smem";
+            reg = <0xfa00000 0x200000>;
+            no-map;
+
+            hwlocks = <&tcsr_mutex 3>;
+        };
+    };
+  - |
+    reserved-memory {
+        #address-cells = <1>;
+        #size-cells = <1>;
+        ranges;
+
         smem_region: smem@fa00000 {
             reg = <0xfa00000 0x200000>;
             no-map;
-- 
2.29.2

[PATCH v2 3/4] soc: qcom: smem: Support reserved-memory description

[Bjorn Andersson]

Practically all modern Qualcomm platforms has a single reserved-memory
region for SMEM. So rather than having to describe SMEM in the form of a
node with a reference to a reserved-memory node, allow the SMEM device
to be instantiated directly from the reserved-memory node.

The current means of falling back to dereferencing the "memory-region"
is kept as a fallback, if it's determined that the SMEM node is a
reserved-memory node.

The "qcom,smem" compatible is added to the reserved_mem_matches list, to
allow the reserved-memory device to be probed.

In order to retain the readability of the code, the resolution of
resources is split from the actual ioremapping.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---

Changes since v1:
- None

 drivers/of/platform.c   |  1 +
 drivers/soc/qcom/smem.c | 57 ++++++++++++++++++++++++++++-------------
 2 files changed, 40 insertions(+), 18 deletions(-)

diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 32d5ff8df747..07813fb1ef37 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -505,6 +505,7 @@ EXPORT_SYMBOL_GPL(of_platform_default_populate);
 static const struct of_device_id reserved_mem_matches[] = {
 	{ .compatible = "qcom,rmtfs-mem" },
 	{ .compatible = "qcom,cmd-db" },
+	{ .compatible = "qcom,smem" },
 	{ .compatible = "ramoops" },
 	{ .compatible = "nvmem-rmem" },
 	{}
diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c
index 4fb5aeeb0843..c7e519bfdc8a 100644
--- a/drivers/soc/qcom/smem.c
+++ b/drivers/soc/qcom/smem.c
@@ -9,6 +9,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
+#include <linux/of_reserved_mem.h>
 #include <linux/platform_device.h>
 #include <linux/sizes.h>
 #include <linux/slab.h>
@@ -240,7 +241,7 @@ static const u8 SMEM_INFO_MAGIC[] = { 0x53, 0x49, 0x49, 0x49 }; /* SIII */
  * @size:	size of the memory region
  */
 struct smem_region {
-	u32 aux_base;
+	phys_addr_t aux_base;
 	void __iomem *virt_base;
 	size_t size;
 };
@@ -499,7 +500,7 @@ static void *qcom_smem_get_global(struct qcom_smem *smem,
 	for (i = 0; i < smem->num_regions; i++) {
 		region = &smem->regions[i];
 
-		if (region->aux_base == aux_base || !aux_base) {
+		if ((u32)region->aux_base == aux_base || !aux_base) {
 			if (size != NULL)
 				*size = le32_to_cpu(entry->size);
 			return region->virt_base + le32_to_cpu(entry->offset);
@@ -664,7 +665,7 @@ phys_addr_t qcom_smem_virt_to_phys(void *p)
 		if (p < region->virt_base + region->size) {
 			u64 offset = p - region->virt_base;
 
-			return (phys_addr_t)region->aux_base + offset;
+			return region->aux_base + offset;
 		}
 	}
 
@@ -863,12 +864,12 @@ qcom_smem_enumerate_partitions(struct qcom_smem *smem, u16 local_host)
 	return 0;
 }
 
-static int qcom_smem_map_memory(struct qcom_smem *smem, struct device *dev,
-				const char *name, int i)
+static int qcom_smem_resolve_mem(struct qcom_smem *smem, const char *name,
+				 struct smem_region *region)
 {
+	struct device *dev = smem->dev;
 	struct device_node *np;
 	struct resource r;
-	resource_size_t size;
 	int ret;
 
 	np = of_parse_phandle(dev->of_node, name, 0);
@@ -881,13 +882,9 @@ static int qcom_smem_map_memory(struct qcom_smem *smem, struct device *dev,
 	of_node_put(np);
 	if (ret)
 		return ret;
-	size = resource_size(&r);
 
-	smem->regions[i].virt_base = devm_ioremap_wc(dev, r.start, size);
-	if (!smem->regions[i].virt_base)
-		return -ENOMEM;
-	smem->regions[i].aux_base = (u32)r.start;
-	smem->regions[i].size = size;
+	region->aux_base = r.start;
+	region->size = resource_size(&r);
 
 	return 0;
 }
@@ -895,12 +892,14 @@ static int qcom_smem_map_memory(struct qcom_smem *smem, struct device *dev,
 static int qcom_smem_probe(struct platform_device *pdev)
 {
 	struct smem_header *header;
+	struct reserved_mem *rmem;
 	struct qcom_smem *smem;
 	size_t array_size;
 	int num_regions;
 	int hwlock_id;
 	u32 version;
 	int ret;
+	int i;
 
 	num_regions = 1;
 	if (of_find_property(pdev->dev.of_node, "qcom,rpm-msg-ram", NULL))
@@ -914,13 +913,35 @@ static int qcom_smem_probe(struct platform_device *pdev)
 	smem->dev = &pdev->dev;
 	smem->num_regions = num_regions;
 
-	ret = qcom_smem_map_memory(smem, &pdev->dev, "memory-region", 0);
-	if (ret)
-		return ret;
+	rmem = of_reserved_mem_lookup(pdev->dev.of_node);
+	if (rmem) {
+		smem->regions[0].aux_base = rmem->base;
+		smem->regions[0].size = rmem->size;
+	} else {
+		/*
+		 * Fall back to the memory-region reference, if we're not a
+		 * reserved-memory node.
+		 */
+		ret = qcom_smem_resolve_mem(smem, "memory-region", &smem->regions[0]);
+		if (ret)
+			return ret;
+	}
 
-	if (num_regions > 1 && (ret = qcom_smem_map_memory(smem, &pdev->dev,
-					"qcom,rpm-msg-ram", 1)))
-		return ret;
+	if (num_regions > 1) {
+		ret = qcom_smem_resolve_mem(smem, "qcom,rpm-msg-ram", &smem->regions[1]);
+		if (ret)
+			return ret;
+	}
+
+	for (i = 0; i < num_regions; i++) {
+		smem->regions[i].virt_base = devm_ioremap_wc(&pdev->dev,
+							     smem->regions[i].aux_base,
+							     smem->regions[i].size);
+		if (!smem->regions[i].virt_base) {
+			dev_err(&pdev->dev, "failed to remap %pa\n", &smem->regions[i].aux_base);
+			return -ENOMEM;
+		}
+	}
 
 	header = smem->regions[0].virt_base;
 	if (le32_to_cpu(header->initialized) != 1 ||
-- 
2.29.2

[PATCH v2 4/4] arm64: dts: qcom: sdm845: Drop standalone smem node

[Bjorn Andersson]

Now that the SMEM binding and driver allows the SMEM node to be
described in the reserved-memory region directly, move the compatible
and hwlock properties to the reserved-memory node and drop the
standadlone node.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---

Changes since v1:
- Node name is changed to "smem", as "memory" is reserved for memory nodes.

 arch/arm64/boot/dts/qcom/sdm845.dtsi | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index beee57087d05..64119d2efdcf 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -99,9 +99,11 @@ aop_cmd_db_mem: memory@85fe0000 {
 			no-map;
 		};
 
-		smem_mem: memory@86000000 {
+		smem@86000000 {
+			compatible = "qcom,smem";
 			reg = <0x0 0x86000000 0 0x200000>;
 			no-map;
+			hwlocks = <&tcsr_mutex 3>;
 		};
 
 		tz_mem: memory@86200000 {
@@ -941,12 +943,6 @@ tcsr_mutex: hwlock {
 		#hwlock-cells = <1>;
 	};
 
-	smem {
-		compatible = "qcom,smem";
-		memory-region = <&smem_mem>;
-		hwlocks = <&tcsr_mutex 3>;
-	};
-
 	smp2p-cdsp {
 		compatible = "qcom,smp2p";
 		qcom,smem = <94>, <432>;
-- 
2.29.2

Re: [PATCH v2 3/4] soc: qcom: smem: Support reserved-memory description

[Vladimir Zapolskiy]

Hi Bjorn,

On 9/30/21 9:21 PM, Bjorn Andersson wrote:
> Practically all modern Qualcomm platforms has a single reserved-memory
> region for SMEM. So rather than having to describe SMEM in the form of a
> node with a reference to a reserved-memory node, allow the SMEM device
> to be instantiated directly from the reserved-memory node.
> 
> The current means of falling back to dereferencing the "memory-region"
> is kept as a fallback, if it's determined that the SMEM node is a
> reserved-memory node.
> 
> The "qcom,smem" compatible is added to the reserved_mem_matches list, to
> allow the reserved-memory device to be probed.
> 
> In order to retain the readability of the code, the resolution of
> resources is split from the actual ioremapping.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> ---
> 
> Changes since v1:
> - None
> 
>   drivers/of/platform.c   |  1 +
>   drivers/soc/qcom/smem.c | 57 ++++++++++++++++++++++++++++-------------
>   2 files changed, 40 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/of/platform.c b/drivers/of/platform.c
> index 32d5ff8df747..07813fb1ef37 100644
> --- a/drivers/of/platform.c
> +++ b/drivers/of/platform.c
> @@ -505,6 +505,7 @@ EXPORT_SYMBOL_GPL(of_platform_default_populate);
>   static const struct of_device_id reserved_mem_matches[] = {
>   	{ .compatible = "qcom,rmtfs-mem" },
>   	{ .compatible = "qcom,cmd-db" },
> +	{ .compatible = "qcom,smem" },
>   	{ .compatible = "ramoops" },
>   	{ .compatible = "nvmem-rmem" },
>   	{}
> diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c
> index 4fb5aeeb0843..c7e519bfdc8a 100644
> --- a/drivers/soc/qcom/smem.c
> +++ b/drivers/soc/qcom/smem.c
> @@ -9,6 +9,7 @@
>   #include <linux/module.h>
>   #include <linux/of.h>
>   #include <linux/of_address.h>
> +#include <linux/of_reserved_mem.h>
>   #include <linux/platform_device.h>
>   #include <linux/sizes.h>
>   #include <linux/slab.h>
> @@ -240,7 +241,7 @@ static const u8 SMEM_INFO_MAGIC[] = { 0x53, 0x49, 0x49, 0x49 }; /* SIII */
>    * @size:	size of the memory region
>    */
>   struct smem_region {
> -	u32 aux_base;
> +	phys_addr_t aux_base;
>   	void __iomem *virt_base;
>   	size_t size;
>   };
> @@ -499,7 +500,7 @@ static void *qcom_smem_get_global(struct qcom_smem *smem,
>   	for (i = 0; i < smem->num_regions; i++) {
>   		region = &smem->regions[i];
>   
> -		if (region->aux_base == aux_base || !aux_base) {
> +		if ((u32)region->aux_base == aux_base || !aux_base) {
>   			if (size != NULL)
>   				*size = le32_to_cpu(entry->size);
>   			return region->virt_base + le32_to_cpu(entry->offset);
> @@ -664,7 +665,7 @@ phys_addr_t qcom_smem_virt_to_phys(void *p)
>   		if (p < region->virt_base + region->size) {
>   			u64 offset = p - region->virt_base;
>   
> -			return (phys_addr_t)region->aux_base + offset;
> +			return region->aux_base + offset;
>   		}
>   	}
>   
> @@ -863,12 +864,12 @@ qcom_smem_enumerate_partitions(struct qcom_smem *smem, u16 local_host)
>   	return 0;
>   }
>   
> -static int qcom_smem_map_memory(struct qcom_smem *smem, struct device *dev,
> -				const char *name, int i)
> +static int qcom_smem_resolve_mem(struct qcom_smem *smem, const char *name,
> +				 struct smem_region *region)
>   {
> +	struct device *dev = smem->dev;
>   	struct device_node *np;
>   	struct resource r;
> -	resource_size_t size;
>   	int ret;
>   
>   	np = of_parse_phandle(dev->of_node, name, 0);
> @@ -881,13 +882,9 @@ static int qcom_smem_map_memory(struct qcom_smem *smem, struct device *dev,
>   	of_node_put(np);
>   	if (ret)
>   		return ret;
> -	size = resource_size(&r);
>   
> -	smem->regions[i].virt_base = devm_ioremap_wc(dev, r.start, size);
> -	if (!smem->regions[i].virt_base)
> -		return -ENOMEM;
> -	smem->regions[i].aux_base = (u32)r.start;
> -	smem->regions[i].size = size;
> +	region->aux_base = r.start;
> +	region->size = resource_size(&r);
>   
>   	return 0;
>   }
> @@ -895,12 +892,14 @@ static int qcom_smem_map_memory(struct qcom_smem *smem, struct device *dev,
>   static int qcom_smem_probe(struct platform_device *pdev)
>   {
>   	struct smem_header *header;
> +	struct reserved_mem *rmem;
>   	struct qcom_smem *smem;
>   	size_t array_size;
>   	int num_regions;
>   	int hwlock_id;
>   	u32 version;
>   	int ret;
> +	int i;

Just a nitpicking, the index can be unsigned.

>   
>   	num_regions = 1;
>   	if (of_find_property(pdev->dev.of_node, "qcom,rpm-msg-ram", NULL))
> @@ -914,13 +913,35 @@ static int qcom_smem_probe(struct platform_device *pdev)
>   	smem->dev = &pdev->dev;
>   	smem->num_regions = num_regions;
>   
> -	ret = qcom_smem_map_memory(smem, &pdev->dev, "memory-region", 0);
> -	if (ret)
> -		return ret;
> +	rmem = of_reserved_mem_lookup(pdev->dev.of_node);
> +	if (rmem) {
> +		smem->regions[0].aux_base = rmem->base;
> +		smem->regions[0].size = rmem->size;
> +	} else {
> +		/*
> +		 * Fall back to the memory-region reference, if we're not a
> +		 * reserved-memory node.
> +		 */
> +		ret = qcom_smem_resolve_mem(smem, "memory-region", &smem->regions[0]);
> +		if (ret)
> +			return ret;
> +	}
>   
> -	if (num_regions > 1 && (ret = qcom_smem_map_memory(smem, &pdev->dev,
> -					"qcom,rpm-msg-ram", 1)))
> -		return ret;
> +	if (num_regions > 1) {
> +		ret = qcom_smem_resolve_mem(smem, "qcom,rpm-msg-ram", &smem->regions[1]);
> +		if (ret)
> +			return ret;
> +	}
> +
> +	for (i = 0; i < num_regions; i++) {
> +		smem->regions[i].virt_base = devm_ioremap_wc(&pdev->dev,
> +							     smem->regions[i].aux_base,
> +							     smem->regions[i].size);
> +		if (!smem->regions[i].virt_base) {
> +			dev_err(&pdev->dev, "failed to remap %pa\n", &smem->regions[i].aux_base);
> +			return -ENOMEM;
> +		}
> +	}
>   
>   	header = smem->regions[0].virt_base;
>   	if (le32_to_cpu(header->initialized) != 1 ||
> 

--
Best wishes,
Vladimir

Re: [PATCH v2 0/4] dt-bindings: soc: smem: Make indirection optional

[Vladimir Zapolskiy]

Hi Bjorn,

On 9/30/21 9:21 PM, Bjorn Andersson wrote:
> In the modern Qualcomm platform there's no reason for having smem as a
> separate node, so let's change this.
> 
> Bjorn Andersson (4):
>    dt-bindings: sram: Document qcom,rpm-msg-ram
>    dt-bindings: soc: smem: Make indirection optional
>    soc: qcom: smem: Support reserved-memory description
>    arm64: dts: qcom: sdm845: Drop standalone smem node
> 
>   .../bindings/soc/qcom/qcom,smem.yaml          | 34 +++++++++--
>   .../devicetree/bindings/sram/sram.yaml        |  5 +-
>   arch/arm64/boot/dts/qcom/sdm845.dtsi          | 10 +---
>   drivers/of/platform.c                         |  1 +
>   drivers/soc/qcom/smem.c                       | 57 +++++++++++++------
>   5 files changed, 77 insertions(+), 30 deletions(-)
> 

the patch series looks good.

Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>

--
Best wishes,
Vladimir

Re: [PATCH v2 3/4] soc: qcom: smem: Support reserved-memory description

[Bjorn Andersson]

On Fri 01 Oct 00:08 PDT 2021, Vladimir Zapolskiy wrote:
> On 9/30/21 9:21 PM, Bjorn Andersson wrote:
[..]
> > diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c
[..]
> > @@ -895,12 +892,14 @@ static int qcom_smem_map_memory(struct qcom_smem *smem, struct device *dev,
> >   static int qcom_smem_probe(struct platform_device *pdev)
> >   {
> >   	struct smem_header *header;
> > +	struct reserved_mem *rmem;
> >   	struct qcom_smem *smem;
> >   	size_t array_size;
> >   	int num_regions;
> >   	int hwlock_id;
> >   	u32 version;
> >   	int ret;
> > +	int i;
> 
> Just a nitpicking, the index can be unsigned.
> 

It's compared against the "num_regions", which is also signed. So I
think it should be signed.

[..]
> > +	for (i = 0; i < num_regions; i++) {

Thanks for the review!

Regards,
Bjorn

Re: [PATCH v2 1/4] dt-bindings: sram: Document qcom,rpm-msg-ram

[Rob Herring]

On Thu, 30 Sep 2021 11:21:08 -0700, Bjorn Andersson wrote:
> The Qualcomm SMEM binding always depended on a reference to a SRAM node
> of compatible "qcom,rpm-msg-ram", document this as part of the SRAM
> binding.
> 
> The SRAM is consumed as a whole and not split up using subnodes, so
> properties related to this are not required.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> ---
> 
> Changes since v1:
> - New patch, to resolve issue with the existing qcom,smem example
> 
>  Documentation/devicetree/bindings/sram/sram.yaml | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 

Acked-by: Rob Herring <robh@kernel.org>

Re: [PATCH v2 2/4] dt-bindings: soc: smem: Make indirection optional

[Rob Herring]

On Thu, 30 Sep 2021 11:21:09 -0700, Bjorn Andersson wrote:
> In the olden days the Qualcomm shared memory (SMEM) region consisted of
> multiple chunks of memory, so SMEM was described as a standalone node
> with references to its various memory regions.
> 
> But practically all modern Qualcomm platforms has a single reserved memory
> region used for SMEM. So rather than having to use two nodes to describe
> the one SMEM region, update the binding to allow the reserved-memory
> region alone to describe SMEM.
> 
> The olden format is preserved as valid, as this is widely used already.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> ---
> 
> Changes since v1:
> - None
> 
>  .../bindings/soc/qcom/qcom,smem.yaml          | 34 ++++++++++++++++---
>  1 file changed, 30 insertions(+), 4 deletions(-)
> 

Reviewed-by: Rob Herring <robh@kernel.org>

Re: [PATCH v2 3/4] soc: qcom: smem: Support reserved-memory description

[Rob Herring]

On Thu, Sep 30, 2021 at 11:21:10AM -0700, Bjorn Andersson wrote:
> Practically all modern Qualcomm platforms has a single reserved-memory
> region for SMEM. So rather than having to describe SMEM in the form of a
> node with a reference to a reserved-memory node, allow the SMEM device
> to be instantiated directly from the reserved-memory node.
> 
> The current means of falling back to dereferencing the "memory-region"
> is kept as a fallback, if it's determined that the SMEM node is a
> reserved-memory node.
> 
> The "qcom,smem" compatible is added to the reserved_mem_matches list, to
> allow the reserved-memory device to be probed.
> 
> In order to retain the readability of the code, the resolution of
> resources is split from the actual ioremapping.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> ---
> 
> Changes since v1:
> - None
> 
>  drivers/of/platform.c   |  1 +

Acked-by: Rob Herring <robh@kernel.org>

>  drivers/soc/qcom/smem.c | 57 ++++++++++++++++++++++++++++-------------
>  2 files changed, 40 insertions(+), 18 deletions(-)

Re: [PATCH v2 0/4] dt-bindings: soc: smem: Make indirection optional

[patchwork-bot+linux-arm-msm]

Hello:

This series was applied to qcom/linux.git (for-next)
by Bjorn Andersson <bjorn.andersson@linaro.org>:

On Thu, 30 Sep 2021 11:21:07 -0700 you wrote:
> In the modern Qualcomm platform there's no reason for having smem as a
> separate node, so let's change this.
> 
> Bjorn Andersson (4):
>   dt-bindings: sram: Document qcom,rpm-msg-ram
>   dt-bindings: soc: smem: Make indirection optional
>   soc: qcom: smem: Support reserved-memory description
>   arm64: dts: qcom: sdm845: Drop standalone smem node
> 
> [...]

Here is the summary with links:
  - [v2,1/4] dt-bindings: sram: Document qcom,rpm-msg-ram
    https://git.kernel.org/qcom/c/d0fe6491ddd2
  - [v2,2/4] dt-bindings: soc: smem: Make indirection optional
    https://git.kernel.org/qcom/c/7a99e87e2e6b
  - [v2,3/4] soc: qcom: smem: Support reserved-memory description
    https://git.kernel.org/qcom/c/b5af64fceb04
  - [v2,4/4] arm64: dts: qcom: sdm845: Drop standalone smem node
    https://git.kernel.org/qcom/c/622adb84b3e7

You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html

Re: (subset) [PATCH v2 0/4] dt-bindings: soc: smem: Make indirection optional

[Bjorn Andersson]

On Thu, 30 Sep 2021 11:21:07 -0700, Bjorn Andersson wrote:
> In the modern Qualcomm platform there's no reason for having smem as a
> separate node, so let's change this.
> 
> Bjorn Andersson (4):
>   dt-bindings: sram: Document qcom,rpm-msg-ram
>   dt-bindings: soc: smem: Make indirection optional
>   soc: qcom: smem: Support reserved-memory description
>   arm64: dts: qcom: sdm845: Drop standalone smem node
> 
> [...]

Applied, thanks!

[4/4] arm64: dts: qcom: sdm845: Drop standalone smem node
      commit: 622adb84b3e7c48a888c3df26fbf28679ded660b

Best regards,
-- 
Bjorn Andersson <bjorn.andersson@linaro.org>

Re: (subset) [PATCH v2 4/4] arm64: dts: qcom: sdm845: Drop standalone smem node

[Bjorn Andersson]

On Thu, 30 Sep 2021 11:21:11 -0700, Bjorn Andersson wrote:
> Now that the SMEM binding and driver allows the SMEM node to be
> described in the reserved-memory region directly, move the compatible
> and hwlock properties to the reserved-memory node and drop the
> standadlone node.
> 
> 

Applied, thanks!

[4/4] arm64: dts: qcom: sdm845: Drop standalone smem node
      commit: 622adb84b3e7c48a888c3df26fbf28679ded660b

Best regards,
-- 
Bjorn Andersson <bjorn.andersson@linaro.org>