[PATCH RFC v3 0/4] spmi: pmic-arb: Add support for multiple buses

[PATCH RFC v3 0/4] spmi: pmic-arb: Add support for multiple buses

[Abel Vesa]

This RFC prepares for and adds support for 2 buses, which is supported
in HW starting with version 7. Until now, none of the currently
supported platforms in upstream have used the second bus. The X1E80100
platform, on the other hand, needs the second bus for the USB2.0 to work
as there are 3 SMB2360 PMICs which provide eUSB2 repeaters and they are
all found on the second bus.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
---
Changes in v3:
- Split the change into 3 separate patches. First 2 patches are moving
  apid init and core resources into version specific ops. Third one is
  adding the support for 2 buses and dedicated compatible.
- Added separate bindings patch
- Link to v2: https://lore.kernel.org/r/20240213-spmi-multi-master-support-v2-1-b3b102326906@linaro.org

Changes in v2:
- Reworked it so that it registers a spmi controller for each bus
  rather than relying on the generic framework to pass on the bus
  (master) id.
- Link to v1: https://lore.kernel.org/r/20240207-spmi-multi-master-support-v1-0-ce57f301c7fd@linaro.org

---
Abel Vesa (4):
      dt-bindings: spmi: Add PMIC ARB v7 schema
      spmi: pmic-arb: Make the APID init a version operation
      spmi: pmic-arb: Make core resources acquiring a version operation
      spmi: pmic-arb: Add multi bus support

 .../bindings/spmi/qcom,spmi-pmic-arb-v7.yaml       | 119 +++
 drivers/spmi/spmi-pmic-arb.c                       | 956 +++++++++++++--------
 2 files changed, 712 insertions(+), 363 deletions(-)
---
base-commit: 2c3b09aac00d7835023bbc4473ee06696be64fa8
change-id: 20240207-spmi-multi-master-support-832a704b779b

Best regards,
-- 
Abel Vesa <abel.vesa@linaro.org>

[PATCH RFC v3 1/4] dt-bindings: spmi: Add PMIC ARB v7 schema

[Abel Vesa]

Add dedicated schema for PMIC ARB v7 as it allows multiple
buses by declaring them as child nodes. These child nodes
will follow the generic spmi bus bindings.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
---
 .../bindings/spmi/qcom,spmi-pmic-arb-v7.yaml       | 119 +++++++++++++++++++++
 1 file changed, 119 insertions(+)

diff --git a/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb-v7.yaml b/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb-v7.yaml
new file mode 100644
index 000000000000..8a93d2145aa5
--- /dev/null
+++ b/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb-v7.yaml
@@ -0,0 +1,119 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spmi/qcom,spmi-pmic-arb-v7.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm SPMI Controller v7 (PMIC Arbiter)
+
+maintainers:
+  - Stephen Boyd <sboyd@kernel.org>
+
+description: |
+  The SPMI PMIC Arbiter v7 is found on Snapdragon chipsets. It is an SPMI
+  controller with wrapping arbitration logic to allow for multiple on-chip
+  devices to control up to 2 SPMI separate buses.
+
+  The PMIC Arbiter can also act as an interrupt controller, providing interrupts
+  to slave devices.
+
+properties:
+  compatible:
+    const: qcom,spmi-pmic-arb-v7
+
+  reg:
+    items:
+      - description: core registers
+      - description: tx-channel per virtual slave regosters
+      - description: rx-channel (called observer) per virtual slave registers
+
+  reg-names:
+    items:
+      - const: core
+      - const: chnls
+      - const: obsrvr
+
+  ranges: true
+
+  '#address-cells':
+    const: 2
+
+  '#size-cells':
+    const: 2
+
+  qcom,ee:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 5
+    description: >
+      indicates the active Execution Environment identifier
+
+  qcom,channel:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 5
+    description: >
+      which of the PMIC Arb provided channels to use for accesses
+
+patternProperties:
+  "spmi@[0-1]$":
+    type: object
+    $ref: /schemas/spmi/spmi.yaml
+
+required:
+  - compatible
+  - reg-names
+  - qcom,ee
+  - qcom,channel
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    spmi: arbiter@c400000 {
+      compatible = "qcom,spmi-pmic-arb-v7";
+      reg = <0x0c400000 0x3000>,
+            <0x0c500000 0x4000000>,
+            <0x0c440000 0x80000>;
+      reg-names = "core", "chnls", "obsrvr";
+
+      qcom,ee = <0>;
+      qcom,channel = <0>;
+
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      spmi_bus0: spmi@0 {
+        reg = <0 0x0c42d000 0 0x4000>,
+              <0 0x0c4c0000 0 0x10000>;
+        reg-names = "cnfg", "intr";
+
+        interrupt-names = "periph_irq";
+        interrupts-extended = <&pdc 1 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-controller;
+        #interrupt-cells = <4>;
+
+        qcom,bus-id = <0>;
+
+        #address-cells = <2>;
+        #size-cells = <0>;
+      };
+
+      spmi_bus1: spmi@1 {
+        reg = <0 0x0c432000 0 0x4000>,
+              <0 0x0c4d0000 0 0x10000>;
+        reg-names = "cnfg", "intr";
+
+        interrupt-names = "periph_irq";
+        interrupts-extended = <&pdc 3 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-controller;
+        #interrupt-cells = <4>;
+
+        qcom,bus-id = <1>;
+
+        #address-cells = <2>;
+        #size-cells = <0>;
+      };
+    };

-- 
2.34.1

Re: [PATCH RFC v3 1/4] dt-bindings: spmi: Add PMIC ARB v7 schema

[Krzysztof Kozlowski]

On 14/02/2024 22:13, Abel Vesa wrote:
> Add dedicated schema for PMIC ARB v7 as it allows multiple
> buses by declaring them as child nodes. These child nodes
> will follow the generic spmi bus bindings.
> 
> Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
> ---

Please use scripts/get_maintainers.pl to get a list of necessary people
and lists to CC. It might happen, that command when run on an older
kernel, gives you outdated entries. Therefore please be sure you base
your patches on recent Linux kernel.

Tools like b4 or scripts/get_maintainer.pl provide you proper list of
people, so fix your workflow. Tools might also fail if you work on some
ancient tree (don't, instead use mainline), work on fork of kernel
(don't, instead use mainline) or you ignore some maintainers (really
don't). Just use b4 and everything should be fine, although remember
about `b4 prep --auto-to-cc` if you added new patches to the patchset.

You missed at least devicetree list (maybe more), so this won't be
tested by automated tooling. Performing review on untested code might be
a waste of time, thus I will skip this patch entirely till you follow
the process allowing the patch to be tested.

Please kindly resend and include all necessary To/Cc entries.


Best regards,
Krzysztof

Re: [PATCH RFC v3 1/4] dt-bindings: spmi: Add PMIC ARB v7 schema

[Abel Vesa]

On 24-02-15 09:54:37, Krzysztof Kozlowski wrote:
> On 14/02/2024 22:13, Abel Vesa wrote:
> > Add dedicated schema for PMIC ARB v7 as it allows multiple
> > buses by declaring them as child nodes. These child nodes
> > will follow the generic spmi bus bindings.
> > 
> > Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
> > ---
> 
> Please use scripts/get_maintainers.pl to get a list of necessary people
> and lists to CC. It might happen, that command when run on an older
> kernel, gives you outdated entries. Therefore please be sure you base
> your patches on recent Linux kernel.
> 
> Tools like b4 or scripts/get_maintainer.pl provide you proper list of
> people, so fix your workflow. Tools might also fail if you work on some
> ancient tree (don't, instead use mainline), work on fork of kernel
> (don't, instead use mainline) or you ignore some maintainers (really
> don't). Just use b4 and everything should be fine, although remember
> about `b4 prep --auto-to-cc` if you added new patches to the patchset.
> 
> You missed at least devicetree list (maybe more), so this won't be
> tested by automated tooling. Performing review on untested code might be
> a waste of time, thus I will skip this patch entirely till you follow
> the process allowing the patch to be tested.
> 
> Please kindly resend and include all necessary To/Cc entries.
> 

Forgot to run "b4 prep --auto-to-cc" AFTER I added the bindings patch.
Sorry about that. Will do it for the next version.

> 
> Best regards,
> Krzysztof
> 

[PATCH RFC v3 2/4] spmi: pmic-arb: Make the APID init a version operation

[Abel Vesa]

Rather than using conditionals in probe function, add the APID init
as a version specific operation. Due to v7, which supports multiple
buses, pass on the bus index to be used for sorting out the apid base
and count.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
---
 drivers/spmi/spmi-pmic-arb.c | 199 +++++++++++++++++++++++++++----------------
 1 file changed, 124 insertions(+), 75 deletions(-)

diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index 9ed1180fe31f..23939c0d225f 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -183,6 +183,7 @@ struct spmi_pmic_arb {
  * struct pmic_arb_ver_ops - version dependent functionality.
  *
  * @ver_str:		version string.
+ * @init_apid:		finds the apid base and count
  * @ppid_to_apid:	finds the apid for a given ppid.
  * @non_data_cmd:	on v1 issues an spmi non-data command.
  *			on v2 no HW support, returns -EOPNOTSUPP.
@@ -202,6 +203,7 @@ struct spmi_pmic_arb {
  */
 struct pmic_arb_ver_ops {
 	const char *ver_str;
+	int (*init_apid)(struct spmi_pmic_arb *pmic_arb, int index);
 	int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u16 ppid);
 	/* spmi commands (read_cmd, write_cmd, cmd) functionality */
 	int (*offset)(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
@@ -942,6 +944,38 @@ static int qpnpint_irq_domain_alloc(struct irq_domain *domain,
 	return 0;
 }
 
+static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb)
+{
+	/*
+	 * Initialize max_apid/min_apid to the opposite bounds, during
+	 * the irq domain translation, we are sure to update these
+	 */
+	pmic_arb->max_apid = 0;
+	pmic_arb->min_apid = pmic_arb->max_periphs - 1;
+
+	return 0;
+}
+
+static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb, int index)
+{
+	u32 *mapping_table;
+
+	if (index) {
+		dev_err(&pmic_arb->spmic->dev, "Unsupported buses count %d detected\n",
+			index);
+		return -EINVAL;
+	}
+
+	mapping_table = devm_kcalloc(&pmic_arb->spmic->dev, pmic_arb->max_periphs,
+				     sizeof(*mapping_table), GFP_KERNEL);
+	if (!mapping_table)
+		return -ENOMEM;
+
+	pmic_arb->mapping_table = mapping_table;
+
+	return pmic_arb_init_apid_min_max(pmic_arb);
+}
+
 static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pmic_arb, u16 ppid)
 {
 	u32 *mapping_table = pmic_arb->mapping_table;
@@ -1144,6 +1178,40 @@ static int pmic_arb_offset_v2(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
 	return 0x1000 * pmic_arb->ee + 0x8000 * apid;
 }
 
+static int pmic_arb_init_apid_v5(struct spmi_pmic_arb *pmic_arb, int index)
+{
+	int ret;
+
+	if (index) {
+		dev_err(&pmic_arb->spmic->dev, "Unsupported buses count %d detected\n",
+			index);
+		return -EINVAL;
+	}
+
+	pmic_arb->base_apid = 0;
+	pmic_arb->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) &
+					   PMIC_ARB_FEATURES_PERIPH_MASK;
+
+	if (pmic_arb->base_apid + pmic_arb->apid_count > pmic_arb->max_periphs) {
+		dev_err(&pmic_arb->spmic->dev, "Unsupported APID count %d detected\n",
+			pmic_arb->base_apid + pmic_arb->apid_count);
+		return -EINVAL;
+	}
+
+	ret = pmic_arb_init_apid_min_max(pmic_arb);
+	if (ret)
+		return ret;
+
+	ret = pmic_arb_read_apid_map_v5(pmic_arb);
+	if (ret) {
+		dev_err(&pmic_arb->spmic->dev, "could not read APID->PPID mapping table, rc= %d\n",
+			ret);
+		return ret;
+	}
+
+	return 0;
+}
+
 /*
  * v5 offset per ee and per apid for observer channels and per apid for
  * read/write channels.
@@ -1178,6 +1246,49 @@ static int pmic_arb_offset_v5(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
 	return offset;
 }
 
+/*
+ * Only v7 supports 2 bus buses. Each bus will get a different apid count,
+ * read from different registers.
+ */
+static int pmic_arb_init_apid_v7(struct spmi_pmic_arb *pmic_arb, int index)
+{
+	int ret;
+
+	if (index == 0) {
+		pmic_arb->base_apid = 0;
+		pmic_arb->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) &
+						   PMIC_ARB_FEATURES_PERIPH_MASK;
+	} else if (index == 1) {
+		pmic_arb->base_apid = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) &
+						  PMIC_ARB_FEATURES_PERIPH_MASK;
+		pmic_arb->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES1) &
+						   PMIC_ARB_FEATURES_PERIPH_MASK;
+	} else {
+		dev_err(&pmic_arb->spmic->dev, "Unsupported buses count %d detected\n",
+			index);
+		return -EINVAL;
+	}
+
+	if (pmic_arb->base_apid + pmic_arb->apid_count > pmic_arb->max_periphs) {
+		dev_err(&pmic_arb->spmic->dev, "Unsupported APID count %d detected\n",
+			pmic_arb->base_apid + pmic_arb->apid_count);
+		return -EINVAL;
+	}
+
+	ret = pmic_arb_init_apid_min_max(pmic_arb);
+	if (ret)
+		return ret;
+
+	ret = pmic_arb_read_apid_map_v5(pmic_arb);
+	if (ret) {
+		dev_err(&pmic_arb->spmic->dev, "could not read APID->PPID mapping table, rc= %d\n",
+			ret);
+		return ret;
+	}
+
+	return 0;
+}
+
 /*
  * v7 offset per ee and per apid for observer channels and per apid for
  * read/write channels.
@@ -1358,6 +1469,7 @@ pmic_arb_apid_owner_v7(struct spmi_pmic_arb *pmic_arb, u16 n)
 
 static const struct pmic_arb_ver_ops pmic_arb_v1 = {
 	.ver_str		= "v1",
+	.init_apid		= pmic_arb_init_apid_v1,
 	.ppid_to_apid		= pmic_arb_ppid_to_apid_v1,
 	.non_data_cmd		= pmic_arb_non_data_cmd_v1,
 	.offset			= pmic_arb_offset_v1,
@@ -1372,6 +1484,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v1 = {
 
 static const struct pmic_arb_ver_ops pmic_arb_v2 = {
 	.ver_str		= "v2",
+	.init_apid		= pmic_arb_init_apid_v1,
 	.ppid_to_apid		= pmic_arb_ppid_to_apid_v2,
 	.non_data_cmd		= pmic_arb_non_data_cmd_v2,
 	.offset			= pmic_arb_offset_v2,
@@ -1386,6 +1499,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v2 = {
 
 static const struct pmic_arb_ver_ops pmic_arb_v3 = {
 	.ver_str		= "v3",
+	.init_apid		= pmic_arb_init_apid_v1,
 	.ppid_to_apid		= pmic_arb_ppid_to_apid_v2,
 	.non_data_cmd		= pmic_arb_non_data_cmd_v2,
 	.offset			= pmic_arb_offset_v2,
@@ -1400,6 +1514,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v3 = {
 
 static const struct pmic_arb_ver_ops pmic_arb_v5 = {
 	.ver_str		= "v5",
+	.init_apid		= pmic_arb_init_apid_v5,
 	.ppid_to_apid		= pmic_arb_ppid_to_apid_v5,
 	.non_data_cmd		= pmic_arb_non_data_cmd_v2,
 	.offset			= pmic_arb_offset_v5,
@@ -1414,6 +1529,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v5 = {
 
 static const struct pmic_arb_ver_ops pmic_arb_v7 = {
 	.ver_str		= "v7",
+	.init_apid		= pmic_arb_init_apid_v7,
 	.ppid_to_apid		= pmic_arb_ppid_to_apid_v5,
 	.non_data_cmd		= pmic_arb_non_data_cmd_v2,
 	.offset			= pmic_arb_offset_v7,
@@ -1439,7 +1555,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
 	struct spmi_controller *ctrl;
 	struct resource *res;
 	void __iomem *core;
-	u32 *mapping_table;
 	u32 channel, ee, hw_ver;
 	int err;
 
@@ -1467,12 +1582,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
 
 	pmic_arb->core_size = resource_size(res);
 
-	pmic_arb->ppid_to_apid = devm_kcalloc(&ctrl->dev, PMIC_ARB_MAX_PPID,
-					      sizeof(*pmic_arb->ppid_to_apid),
-					      GFP_KERNEL);
-	if (!pmic_arb->ppid_to_apid)
-		return -ENOMEM;
-
 	hw_ver = readl_relaxed(core + PMIC_ARB_VERSION);
 
 	if (hw_ver < PMIC_ARB_VERSION_V2_MIN) {
@@ -1506,58 +1615,17 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
 			return PTR_ERR(pmic_arb->wr_base);
 	}
 
-	pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
+	dev_info(&ctrl->dev, "PMIC arbiter version %s (0x%x)\n",
+		 pmic_arb->ver_ops->ver_str, hw_ver);
 
-	if (hw_ver >= PMIC_ARB_VERSION_V7_MIN) {
+	if (hw_ver < PMIC_ARB_VERSION_V7_MIN)
+		pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
+	else
 		pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS_V7;
-		/* Optional property for v7: */
-		of_property_read_u32(pdev->dev.of_node, "qcom,bus-id",
-					&pmic_arb->bus_instance);
-		if (pmic_arb->bus_instance > 1) {
-			dev_err(&pdev->dev, "invalid bus instance (%u) specified\n",
-				pmic_arb->bus_instance);
-			return -EINVAL;
-		}
-
-		if (pmic_arb->bus_instance == 0) {
-			pmic_arb->base_apid = 0;
-			pmic_arb->apid_count =
-				readl_relaxed(core + PMIC_ARB_FEATURES) &
-				PMIC_ARB_FEATURES_PERIPH_MASK;
-		} else {
-			pmic_arb->base_apid =
-				readl_relaxed(core + PMIC_ARB_FEATURES) &
-				PMIC_ARB_FEATURES_PERIPH_MASK;
-			pmic_arb->apid_count =
-				readl_relaxed(core + PMIC_ARB_FEATURES1) &
-				PMIC_ARB_FEATURES_PERIPH_MASK;
-		}
 
-		if (pmic_arb->base_apid + pmic_arb->apid_count > pmic_arb->max_periphs) {
-			dev_err(&pdev->dev, "Unsupported APID count %d detected\n",
-				pmic_arb->base_apid + pmic_arb->apid_count);
-			return -EINVAL;
-		}
-	} else if (hw_ver >= PMIC_ARB_VERSION_V5_MIN) {
-		pmic_arb->base_apid = 0;
-		pmic_arb->apid_count = readl_relaxed(core + PMIC_ARB_FEATURES) &
-					PMIC_ARB_FEATURES_PERIPH_MASK;
-
-		if (pmic_arb->apid_count > pmic_arb->max_periphs) {
-			dev_err(&pdev->dev, "Unsupported APID count %d detected\n",
-				pmic_arb->apid_count);
-			return -EINVAL;
-		}
-	}
-
-	pmic_arb->apid_data = devm_kcalloc(&ctrl->dev, pmic_arb->max_periphs,
-					   sizeof(*pmic_arb->apid_data),
-					   GFP_KERNEL);
-	if (!pmic_arb->apid_data)
-		return -ENOMEM;
-
-	dev_info(&ctrl->dev, "PMIC arbiter version %s (0x%x)\n",
-		 pmic_arb->ver_ops->ver_str, hw_ver);
+	err = pmic_arb->ver_ops->init_apid(pmic_arb, 0);
+	if (err)
+		return err;
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "intr");
 	pmic_arb->intr = devm_ioremap_resource(&ctrl->dev, res);
@@ -1599,16 +1667,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
 	}
 
 	pmic_arb->ee = ee;
-	mapping_table = devm_kcalloc(&ctrl->dev, pmic_arb->max_periphs,
-					sizeof(*mapping_table), GFP_KERNEL);
-	if (!mapping_table)
-		return -ENOMEM;
-
-	pmic_arb->mapping_table = mapping_table;
-	/* Initialize max_apid/min_apid to the opposite bounds, during
-	 * the irq domain translation, we are sure to update these */
-	pmic_arb->max_apid = 0;
-	pmic_arb->min_apid = pmic_arb->max_periphs - 1;
 
 	platform_set_drvdata(pdev, ctrl);
 	raw_spin_lock_init(&pmic_arb->lock);
@@ -1617,15 +1675,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
 	ctrl->read_cmd = pmic_arb_read_cmd;
 	ctrl->write_cmd = pmic_arb_write_cmd;
 
-	if (hw_ver >= PMIC_ARB_VERSION_V5_MIN) {
-		err = pmic_arb_read_apid_map_v5(pmic_arb);
-		if (err) {
-			dev_err(&pdev->dev, "could not read APID->PPID mapping table, rc= %d\n",
-				err);
-			return err;
-		}
-	}
-
 	dev_dbg(&pdev->dev, "adding irq domain\n");
 	pmic_arb->domain = irq_domain_add_tree(pdev->dev.of_node,
 					 &pmic_arb_irq_domain_ops, pmic_arb);

-- 
2.34.1

Re: [PATCH RFC v3 2/4] spmi: pmic-arb: Make the APID init a version operation

[Konrad Dybcio]

On 14.02.2024 22:13, Abel Vesa wrote:
> Rather than using conditionals in probe function, add the APID init
> as a version specific operation. Due to v7, which supports multiple
> buses, pass on the bus index to be used for sorting out the apid base
> and count.
> 
> Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
> ---

[...]


> +
>  /*
>   * v5 offset per ee and per apid for observer channels and per apid for
>   * read/write channels.
> @@ -1178,6 +1246,49 @@ static int pmic_arb_offset_v5(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
>  	return offset;
>  }
>  
> +/*
> + * Only v7 supports 2 bus buses. Each bus will get a different apid count,

"bus buses"?

Konrad

Re: [PATCH RFC v3 2/4] spmi: pmic-arb: Make the APID init a version operation

[Abel Vesa]

On 24-02-14 22:16:58, Konrad Dybcio wrote:
> On 14.02.2024 22:13, Abel Vesa wrote:
> > Rather than using conditionals in probe function, add the APID init
> > as a version specific operation. Due to v7, which supports multiple
> > buses, pass on the bus index to be used for sorting out the apid base
> > and count.
> > 
> > Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
> > ---
> 
> [...]
> 
> 
> > +
> >  /*
> >   * v5 offset per ee and per apid for observer channels and per apid for
> >   * read/write channels.
> > @@ -1178,6 +1246,49 @@ static int pmic_arb_offset_v5(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
> >  	return offset;
> >  }
> >  
> > +/*
> > + * Only v7 supports 2 bus buses. Each bus will get a different apid count,
> 
> "bus buses"?

Urgh. Will fix in the next version.

> 
> Konrad

[PATCH RFC v3 3/4] spmi: pmic-arb: Make core resources acquiring a version operation

[Abel Vesa]

Rather than setting up the core, obsrv and chnls in probe by using
version specific conditionals, add a dedicated "get_core_resources"
version specific op and move the acquiring in there.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
---
 drivers/spmi/spmi-pmic-arb.c | 111 ++++++++++++++++++++++++++++++-------------
 1 file changed, 78 insertions(+), 33 deletions(-)

diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index 23939c0d225f..489556467a4c 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -203,6 +203,7 @@ struct spmi_pmic_arb {
  */
 struct pmic_arb_ver_ops {
 	const char *ver_str;
+	int (*get_core_resources)(struct platform_device *pdev, void __iomem *core);
 	int (*init_apid)(struct spmi_pmic_arb *pmic_arb, int index);
 	int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u16 ppid);
 	/* spmi commands (read_cmd, write_cmd, cmd) functionality */
@@ -956,6 +957,19 @@ static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb)
 	return 0;
 }
 
+static int pmic_arb_get_core_resources_v1(struct platform_device *pdev,
+					  void __iomem *core)
+{
+	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
+
+	pmic_arb->wr_base = core;
+	pmic_arb->rd_base = core;
+
+	pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
+
+	return 0;
+}
+
 static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb, int index)
 {
 	u32 *mapping_table;
@@ -1063,6 +1077,41 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid)
 	return apid;
 }
 
+static int pmic_arb_get_obsrvr_chnls_v2(struct platform_device *pdev)
+{
+	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+					   "obsrvr");
+	pmic_arb->rd_base = devm_ioremap(dev, res->start,
+					 resource_size(res));
+	if (IS_ERR(pmic_arb->rd_base))
+		return PTR_ERR(pmic_arb->rd_base);
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+					   "chnls");
+	pmic_arb->wr_base = devm_ioremap(dev, res->start,
+					 resource_size(res));
+	if (IS_ERR(pmic_arb->wr_base))
+		return PTR_ERR(pmic_arb->wr_base);
+
+	return 0;
+}
+
+static int pmic_arb_get_core_resources_v2(struct platform_device *pdev,
+					  void __iomem *core)
+{
+	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
+
+	pmic_arb->core = core;
+
+	pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
+
+	return pmic_arb_get_obsrvr_chnls_v2(pdev);
+}
+
 static int pmic_arb_ppid_to_apid_v2(struct spmi_pmic_arb *pmic_arb, u16 ppid)
 {
 	u16 apid_valid;
@@ -1246,6 +1295,18 @@ static int pmic_arb_offset_v5(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
 	return offset;
 }
 
+static int pmic_arb_get_core_resources_v7(struct platform_device *pdev,
+					  void __iomem *core)
+{
+	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
+
+	pmic_arb->core = core;
+
+	pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS_V7;
+
+	return pmic_arb_get_obsrvr_chnls_v2(pdev);
+}
+
 /*
  * Only v7 supports 2 bus buses. Each bus will get a different apid count,
  * read from different registers.
@@ -1469,6 +1530,7 @@ pmic_arb_apid_owner_v7(struct spmi_pmic_arb *pmic_arb, u16 n)
 
 static const struct pmic_arb_ver_ops pmic_arb_v1 = {
 	.ver_str		= "v1",
+	.get_core_resources	= pmic_arb_get_core_resources_v1,
 	.init_apid		= pmic_arb_init_apid_v1,
 	.ppid_to_apid		= pmic_arb_ppid_to_apid_v1,
 	.non_data_cmd		= pmic_arb_non_data_cmd_v1,
@@ -1484,6 +1546,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v1 = {
 
 static const struct pmic_arb_ver_ops pmic_arb_v2 = {
 	.ver_str		= "v2",
+	.get_core_resources	= pmic_arb_get_core_resources_v2,
 	.init_apid		= pmic_arb_init_apid_v1,
 	.ppid_to_apid		= pmic_arb_ppid_to_apid_v2,
 	.non_data_cmd		= pmic_arb_non_data_cmd_v2,
@@ -1499,6 +1562,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v2 = {
 
 static const struct pmic_arb_ver_ops pmic_arb_v3 = {
 	.ver_str		= "v3",
+	.get_core_resources	= pmic_arb_get_core_resources_v2,
 	.init_apid		= pmic_arb_init_apid_v1,
 	.ppid_to_apid		= pmic_arb_ppid_to_apid_v2,
 	.non_data_cmd		= pmic_arb_non_data_cmd_v2,
@@ -1514,6 +1578,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v3 = {
 
 static const struct pmic_arb_ver_ops pmic_arb_v5 = {
 	.ver_str		= "v5",
+	.get_core_resources	= pmic_arb_get_core_resources_v2,
 	.init_apid		= pmic_arb_init_apid_v5,
 	.ppid_to_apid		= pmic_arb_ppid_to_apid_v5,
 	.non_data_cmd		= pmic_arb_non_data_cmd_v2,
@@ -1529,6 +1594,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v5 = {
 
 static const struct pmic_arb_ver_ops pmic_arb_v7 = {
 	.ver_str		= "v7",
+	.get_core_resources	= pmic_arb_get_core_resources_v7,
 	.init_apid		= pmic_arb_init_apid_v7,
 	.ppid_to_apid		= pmic_arb_ppid_to_apid_v5,
 	.non_data_cmd		= pmic_arb_non_data_cmd_v2,
@@ -1584,44 +1650,23 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
 
 	hw_ver = readl_relaxed(core + PMIC_ARB_VERSION);
 
-	if (hw_ver < PMIC_ARB_VERSION_V2_MIN) {
+	if (hw_ver < PMIC_ARB_VERSION_V2_MIN)
 		pmic_arb->ver_ops = &pmic_arb_v1;
-		pmic_arb->wr_base = core;
-		pmic_arb->rd_base = core;
-	} else {
-		pmic_arb->core = core;
-
-		if (hw_ver < PMIC_ARB_VERSION_V3_MIN)
-			pmic_arb->ver_ops = &pmic_arb_v2;
-		else if (hw_ver < PMIC_ARB_VERSION_V5_MIN)
-			pmic_arb->ver_ops = &pmic_arb_v3;
-		else if (hw_ver < PMIC_ARB_VERSION_V7_MIN)
-			pmic_arb->ver_ops = &pmic_arb_v5;
-		else
-			pmic_arb->ver_ops = &pmic_arb_v7;
-
-		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-						   "obsrvr");
-		pmic_arb->rd_base = devm_ioremap(&ctrl->dev, res->start,
-						 resource_size(res));
-		if (IS_ERR(pmic_arb->rd_base))
-			return PTR_ERR(pmic_arb->rd_base);
-
-		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-						   "chnls");
-		pmic_arb->wr_base = devm_ioremap(&ctrl->dev, res->start,
-						 resource_size(res));
-		if (IS_ERR(pmic_arb->wr_base))
-			return PTR_ERR(pmic_arb->wr_base);
-	}
+	else if (hw_ver < PMIC_ARB_VERSION_V3_MIN)
+		pmic_arb->ver_ops = &pmic_arb_v2;
+	else if (hw_ver < PMIC_ARB_VERSION_V5_MIN)
+		pmic_arb->ver_ops = &pmic_arb_v3;
+	else if (hw_ver < PMIC_ARB_VERSION_V7_MIN)
+		pmic_arb->ver_ops = &pmic_arb_v5;
+	else
+		pmic_arb->ver_ops = &pmic_arb_v7;
 
 	dev_info(&ctrl->dev, "PMIC arbiter version %s (0x%x)\n",
 		 pmic_arb->ver_ops->ver_str, hw_ver);
 
-	if (hw_ver < PMIC_ARB_VERSION_V7_MIN)
-		pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
-	else
-		pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS_V7;
+	err = pmic_arb->ver_ops->get_core_resources(pdev, core);
+	if (err)
+		return err;
 
 	err = pmic_arb->ver_ops->init_apid(pmic_arb, 0);
 	if (err)

-- 
2.34.1

Re: [PATCH RFC v3 3/4] spmi: pmic-arb: Make core resources acquiring a version operation

[Konrad Dybcio]

On 14.02.2024 22:13, Abel Vesa wrote:
> Rather than setting up the core, obsrv and chnls in probe by using
> version specific conditionals, add a dedicated "get_core_resources"
> version specific op and move the acquiring in there.
> 
> Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
> ---
>  drivers/spmi/spmi-pmic-arb.c | 111 ++++++++++++++++++++++++++++++-------------
>  1 file changed, 78 insertions(+), 33 deletions(-)
> 
> diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
> index 23939c0d225f..489556467a4c 100644
> --- a/drivers/spmi/spmi-pmic-arb.c
> +++ b/drivers/spmi/spmi-pmic-arb.c
> @@ -203,6 +203,7 @@ struct spmi_pmic_arb {
>   */
>  struct pmic_arb_ver_ops {
>  	const char *ver_str;
> +	int (*get_core_resources)(struct platform_device *pdev, void __iomem *core);
>  	int (*init_apid)(struct spmi_pmic_arb *pmic_arb, int index);
>  	int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u16 ppid);
>  	/* spmi commands (read_cmd, write_cmd, cmd) functionality */
> @@ -956,6 +957,19 @@ static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb)
>  	return 0;
>  }
>  
> +static int pmic_arb_get_core_resources_v1(struct platform_device *pdev,
> +					  void __iomem *core)
> +{
> +	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
> +
> +	pmic_arb->wr_base = core;
> +	pmic_arb->rd_base = core;
> +
> +	pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
> +
> +	return 0;
> +}
> +
>  static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb, int index)
>  {
>  	u32 *mapping_table;
> @@ -1063,6 +1077,41 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid)
>  	return apid;
>  }
>  
> +static int pmic_arb_get_obsrvr_chnls_v2(struct platform_device *pdev)
> +{
> +	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
> +	struct device *dev = &pdev->dev;
> +	struct resource *res;
> +
> +	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,

It's no longer indented to deep, no need to keep such aggressive wrapping

> +					   "obsrvr");
> +	pmic_arb->rd_base = devm_ioremap(dev, res->start,
> +					 resource_size(res));
> +	if (IS_ERR(pmic_arb->rd_base))
> +		return PTR_ERR(pmic_arb->rd_base);
> +
> +	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> +					   "chnls");
> +	pmic_arb->wr_base = devm_ioremap(dev, res->start,
> +					 resource_size(res));
> +	if (IS_ERR(pmic_arb->wr_base))
> +		return PTR_ERR(pmic_arb->wr_base);

Could probably make it "devm_platform_get_and_ioremap_resource "

Konrad

Re: [PATCH RFC v3 3/4] spmi: pmic-arb: Make core resources acquiring a version operation

[Abel Vesa]

On 24-02-14 22:18:33, Konrad Dybcio wrote:
> On 14.02.2024 22:13, Abel Vesa wrote:
> > Rather than setting up the core, obsrv and chnls in probe by using
> > version specific conditionals, add a dedicated "get_core_resources"
> > version specific op and move the acquiring in there.
> > 
> > Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
> > ---
> >  drivers/spmi/spmi-pmic-arb.c | 111 ++++++++++++++++++++++++++++++-------------
> >  1 file changed, 78 insertions(+), 33 deletions(-)
> > 
> > diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
> > index 23939c0d225f..489556467a4c 100644
> > --- a/drivers/spmi/spmi-pmic-arb.c
> > +++ b/drivers/spmi/spmi-pmic-arb.c
> > @@ -203,6 +203,7 @@ struct spmi_pmic_arb {
> >   */
> >  struct pmic_arb_ver_ops {
> >  	const char *ver_str;
> > +	int (*get_core_resources)(struct platform_device *pdev, void __iomem *core);
> >  	int (*init_apid)(struct spmi_pmic_arb *pmic_arb, int index);
> >  	int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u16 ppid);
> >  	/* spmi commands (read_cmd, write_cmd, cmd) functionality */
> > @@ -956,6 +957,19 @@ static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb)
> >  	return 0;
> >  }
> >  
> > +static int pmic_arb_get_core_resources_v1(struct platform_device *pdev,
> > +					  void __iomem *core)
> > +{
> > +	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
> > +
> > +	pmic_arb->wr_base = core;
> > +	pmic_arb->rd_base = core;
> > +
> > +	pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
> > +
> > +	return 0;
> > +}
> > +
> >  static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb, int index)
> >  {
> >  	u32 *mapping_table;
> > @@ -1063,6 +1077,41 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid)
> >  	return apid;
> >  }
> >  
> > +static int pmic_arb_get_obsrvr_chnls_v2(struct platform_device *pdev)
> > +{
> > +	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
> > +	struct device *dev = &pdev->dev;
> > +	struct resource *res;
> > +
> > +	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> 
> It's no longer indented to deep, no need to keep such aggressive wrapping
> 

The pmic_arb_get_obsrvr_chnls_v2 is used by both:
pmic_arb_get_core_resources_v2
pmic_arb_get_core_resources_v7

> > +					   "obsrvr");
> > +	pmic_arb->rd_base = devm_ioremap(dev, res->start,
> > +					 resource_size(res));
> > +	if (IS_ERR(pmic_arb->rd_base))
> > +		return PTR_ERR(pmic_arb->rd_base);
> > +
> > +	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> > +					   "chnls");
> > +	pmic_arb->wr_base = devm_ioremap(dev, res->start,
> > +					 resource_size(res));
> > +	if (IS_ERR(pmic_arb->wr_base))
> > +		return PTR_ERR(pmic_arb->wr_base);
> 
> Could probably make it "devm_platform_get_and_ioremap_resource "

The reason this needs to stay as is is because of reason explained by
the following comment found in probe:

/*                                                                           
 * Please don't replace this with devm_platform_ioremap_resource() or        
 * devm_ioremap_resource().  These both result in a call to                  
 * devm_request_mem_region() which prevents multiple mappings of this        
 * register address range.  SoCs with PMIC arbiter v7 may define two         
 * arbiter devices, for the two physical SPMI interfaces, which  share       
 * some register address ranges (i.e. "core", "obsrvr", and "chnls").        
 * Ensure that both devices probe successfully by calling devm_ioremap()     
 * which does not result in a devm_request_mem_region() call.                
 */                                                                          

Even though, AFAICT, there is no platform that adds a second node for
the second bus, currently, in mainline, we should probably allow the
"legacy" approach to still work.

> 
> Konrad

Re: [PATCH RFC v3 3/4] spmi: pmic-arb: Make core resources acquiring a version operation

[Konrad Dybcio]

On 14.02.2024 22:36, Abel Vesa wrote:
> On 24-02-14 22:18:33, Konrad Dybcio wrote:
>> On 14.02.2024 22:13, Abel Vesa wrote:
>>> Rather than setting up the core, obsrv and chnls in probe by using
>>> version specific conditionals, add a dedicated "get_core_resources"
>>> version specific op and move the acquiring in there.
>>>
>>> Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
>>> ---
>>>  drivers/spmi/spmi-pmic-arb.c | 111 ++++++++++++++++++++++++++++++-------------
>>>  1 file changed, 78 insertions(+), 33 deletions(-)
>>>
>>> diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
>>> index 23939c0d225f..489556467a4c 100644
>>> --- a/drivers/spmi/spmi-pmic-arb.c
>>> +++ b/drivers/spmi/spmi-pmic-arb.c
>>> @@ -203,6 +203,7 @@ struct spmi_pmic_arb {
>>>   */
>>>  struct pmic_arb_ver_ops {
>>>  	const char *ver_str;
>>> +	int (*get_core_resources)(struct platform_device *pdev, void __iomem *core);
>>>  	int (*init_apid)(struct spmi_pmic_arb *pmic_arb, int index);
>>>  	int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u16 ppid);
>>>  	/* spmi commands (read_cmd, write_cmd, cmd) functionality */
>>> @@ -956,6 +957,19 @@ static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb)
>>>  	return 0;
>>>  }
>>>  
>>> +static int pmic_arb_get_core_resources_v1(struct platform_device *pdev,
>>> +					  void __iomem *core)
>>> +{
>>> +	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
>>> +
>>> +	pmic_arb->wr_base = core;
>>> +	pmic_arb->rd_base = core;
>>> +
>>> +	pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
>>> +
>>> +	return 0;
>>> +}
>>> +
>>>  static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb, int index)
>>>  {
>>>  	u32 *mapping_table;
>>> @@ -1063,6 +1077,41 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid)
>>>  	return apid;
>>>  }
>>>  
>>> +static int pmic_arb_get_obsrvr_chnls_v2(struct platform_device *pdev)
>>> +{
>>> +	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
>>> +	struct device *dev = &pdev->dev;
>>> +	struct resource *res;
>>> +
>>> +	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
>>
>> It's no longer indented to deep, no need to keep such aggressive wrapping
>>
> 
> The pmic_arb_get_obsrvr_chnls_v2 is used by both:
> pmic_arb_get_core_resources_v2
> pmic_arb_get_core_resources_v7

I meant line wrapping

> 
>>> +					   "obsrvr");
>>> +	pmic_arb->rd_base = devm_ioremap(dev, res->start,
>>> +					 resource_size(res));
>>> +	if (IS_ERR(pmic_arb->rd_base))
>>> +		return PTR_ERR(pmic_arb->rd_base);
>>> +
>>> +	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
>>> +					   "chnls");
>>> +	pmic_arb->wr_base = devm_ioremap(dev, res->start,
>>> +					 resource_size(res));
>>> +	if (IS_ERR(pmic_arb->wr_base))
>>> +		return PTR_ERR(pmic_arb->wr_base);
>>
>> Could probably make it "devm_platform_get_and_ioremap_resource "
> 
> The reason this needs to stay as is is because of reason explained by
> the following comment found in probe:
> 
> /*                                                                           
>  * Please don't replace this with devm_platform_ioremap_resource() or        
>  * devm_ioremap_resource().  These both result in a call to                  
>  * devm_request_mem_region() which prevents multiple mappings of this        
>  * register address range.  SoCs with PMIC arbiter v7 may define two         
>  * arbiter devices, for the two physical SPMI interfaces, which  share       
>  * some register address ranges (i.e. "core", "obsrvr", and "chnls").        
>  * Ensure that both devices probe successfully by calling devm_ioremap()     
>  * which does not result in a devm_request_mem_region() call.                
>  */                                                                          
> 
> Even though, AFAICT, there is no platform that adds a second node for
> the second bus, currently, in mainline, we should probably allow the
> "legacy" approach to still work.

OK right, let's keep it.

Konrad

Re: [PATCH RFC v3 3/4] spmi: pmic-arb: Make core resources acquiring a version operation

[Abel Vesa]

On 24-02-14 22:44:55, Konrad Dybcio wrote:
> On 14.02.2024 22:36, Abel Vesa wrote:
> > On 24-02-14 22:18:33, Konrad Dybcio wrote:
> >> On 14.02.2024 22:13, Abel Vesa wrote:
> >>> Rather than setting up the core, obsrv and chnls in probe by using
> >>> version specific conditionals, add a dedicated "get_core_resources"
> >>> version specific op and move the acquiring in there.
> >>>
> >>> Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
> >>> ---
> >>>  drivers/spmi/spmi-pmic-arb.c | 111 ++++++++++++++++++++++++++++++-------------
> >>>  1 file changed, 78 insertions(+), 33 deletions(-)
> >>>
> >>> diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
> >>> index 23939c0d225f..489556467a4c 100644
> >>> --- a/drivers/spmi/spmi-pmic-arb.c
> >>> +++ b/drivers/spmi/spmi-pmic-arb.c
> >>> @@ -203,6 +203,7 @@ struct spmi_pmic_arb {
> >>>   */
> >>>  struct pmic_arb_ver_ops {
> >>>  	const char *ver_str;
> >>> +	int (*get_core_resources)(struct platform_device *pdev, void __iomem *core);
> >>>  	int (*init_apid)(struct spmi_pmic_arb *pmic_arb, int index);
> >>>  	int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u16 ppid);
> >>>  	/* spmi commands (read_cmd, write_cmd, cmd) functionality */
> >>> @@ -956,6 +957,19 @@ static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb)
> >>>  	return 0;
> >>>  }
> >>>  
> >>> +static int pmic_arb_get_core_resources_v1(struct platform_device *pdev,
> >>> +					  void __iomem *core)
> >>> +{
> >>> +	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
> >>> +
> >>> +	pmic_arb->wr_base = core;
> >>> +	pmic_arb->rd_base = core;
> >>> +
> >>> +	pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
> >>> +
> >>> +	return 0;
> >>> +}
> >>> +
> >>>  static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb, int index)
> >>>  {
> >>>  	u32 *mapping_table;
> >>> @@ -1063,6 +1077,41 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid)
> >>>  	return apid;
> >>>  }
> >>>  
> >>> +static int pmic_arb_get_obsrvr_chnls_v2(struct platform_device *pdev)
> >>> +{
> >>> +	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
> >>> +	struct device *dev = &pdev->dev;
> >>> +	struct resource *res;
> >>> +
> >>> +	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> >>
> >> It's no longer indented to deep, no need to keep such aggressive wrapping
> >>
> > 
> > The pmic_arb_get_obsrvr_chnls_v2 is used by both:
> > pmic_arb_get_core_resources_v2
> > pmic_arb_get_core_resources_v7
> 
> I meant line wrapping

Oh, ok. Will do.

> 
> > 
> >>> +					   "obsrvr");
> >>> +	pmic_arb->rd_base = devm_ioremap(dev, res->start,
> >>> +					 resource_size(res));
> >>> +	if (IS_ERR(pmic_arb->rd_base))
> >>> +		return PTR_ERR(pmic_arb->rd_base);
> >>> +
> >>> +	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> >>> +					   "chnls");
> >>> +	pmic_arb->wr_base = devm_ioremap(dev, res->start,
> >>> +					 resource_size(res));
> >>> +	if (IS_ERR(pmic_arb->wr_base))
> >>> +		return PTR_ERR(pmic_arb->wr_base);
> >>
> >> Could probably make it "devm_platform_get_and_ioremap_resource "
> > 
> > The reason this needs to stay as is is because of reason explained by
> > the following comment found in probe:
> > 
> > /*                                                                           
> >  * Please don't replace this with devm_platform_ioremap_resource() or        
> >  * devm_ioremap_resource().  These both result in a call to                  
> >  * devm_request_mem_region() which prevents multiple mappings of this        
> >  * register address range.  SoCs with PMIC arbiter v7 may define two         
> >  * arbiter devices, for the two physical SPMI interfaces, which  share       
> >  * some register address ranges (i.e. "core", "obsrvr", and "chnls").        
> >  * Ensure that both devices probe successfully by calling devm_ioremap()     
> >  * which does not result in a devm_request_mem_region() call.                
> >  */                                                                          
> > 
> > Even though, AFAICT, there is no platform that adds a second node for
> > the second bus, currently, in mainline, we should probably allow the
> > "legacy" approach to still work.
> 
> OK right, let's keep it.
> 
> Konrad

Re: [PATCH RFC v3 3/4] spmi: pmic-arb: Make core resources acquiring a version operation

[Dmitry Baryshkov]

On Wed, 14 Feb 2024 at 23:36, Abel Vesa <abel.vesa@linaro.org> wrote:
>
> On 24-02-14 22:18:33, Konrad Dybcio wrote:
> > On 14.02.2024 22:13, Abel Vesa wrote:
> > > Rather than setting up the core, obsrv and chnls in probe by using
> > > version specific conditionals, add a dedicated "get_core_resources"
> > > version specific op and move the acquiring in there.
> > >
> > > Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
> > > ---
> > >  drivers/spmi/spmi-pmic-arb.c | 111 ++++++++++++++++++++++++++++++-------------
> > >  1 file changed, 78 insertions(+), 33 deletions(-)
> > >
> > > diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
> > > index 23939c0d225f..489556467a4c 100644
> > > --- a/drivers/spmi/spmi-pmic-arb.c
> > > +++ b/drivers/spmi/spmi-pmic-arb.c
> > > @@ -203,6 +203,7 @@ struct spmi_pmic_arb {
> > >   */
> > >  struct pmic_arb_ver_ops {
> > >     const char *ver_str;
> > > +   int (*get_core_resources)(struct platform_device *pdev, void __iomem *core);
> > >     int (*init_apid)(struct spmi_pmic_arb *pmic_arb, int index);
> > >     int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u16 ppid);
> > >     /* spmi commands (read_cmd, write_cmd, cmd) functionality */
> > > @@ -956,6 +957,19 @@ static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb)
> > >     return 0;
> > >  }
> > >
> > > +static int pmic_arb_get_core_resources_v1(struct platform_device *pdev,
> > > +                                     void __iomem *core)
> > > +{
> > > +   struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
> > > +
> > > +   pmic_arb->wr_base = core;
> > > +   pmic_arb->rd_base = core;
> > > +
> > > +   pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
> > > +
> > > +   return 0;
> > > +}
> > > +
> > >  static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb, int index)
> > >  {
> > >     u32 *mapping_table;
> > > @@ -1063,6 +1077,41 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid)
> > >     return apid;
> > >  }
> > >
> > > +static int pmic_arb_get_obsrvr_chnls_v2(struct platform_device *pdev)
> > > +{
> > > +   struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
> > > +   struct device *dev = &pdev->dev;
> > > +   struct resource *res;
> > > +
> > > +   res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> >
> > It's no longer indented to deep, no need to keep such aggressive wrapping
> >
>
> The pmic_arb_get_obsrvr_chnls_v2 is used by both:
> pmic_arb_get_core_resources_v2
> pmic_arb_get_core_resources_v7
>
> > > +                                      "obsrvr");
> > > +   pmic_arb->rd_base = devm_ioremap(dev, res->start,
> > > +                                    resource_size(res));
> > > +   if (IS_ERR(pmic_arb->rd_base))
> > > +           return PTR_ERR(pmic_arb->rd_base);
> > > +
> > > +   res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> > > +                                      "chnls");
> > > +   pmic_arb->wr_base = devm_ioremap(dev, res->start,
> > > +                                    resource_size(res));
> > > +   if (IS_ERR(pmic_arb->wr_base))
> > > +           return PTR_ERR(pmic_arb->wr_base);
> >
> > Could probably make it "devm_platform_get_and_ioremap_resource "
>
> The reason this needs to stay as is is because of reason explained by
> the following comment found in probe:
>
> /*
>  * Please don't replace this with devm_platform_ioremap_resource() or
>  * devm_ioremap_resource().  These both result in a call to
>  * devm_request_mem_region() which prevents multiple mappings of this
>  * register address range.  SoCs with PMIC arbiter v7 may define two
>  * arbiter devices, for the two physical SPMI interfaces, which  share
>  * some register address ranges (i.e. "core", "obsrvr", and "chnls").
>  * Ensure that both devices probe successfully by calling devm_ioremap()
>  * which does not result in a devm_request_mem_region() call.
>  */
>
> Even though, AFAICT, there is no platform that adds a second node for
> the second bus, currently, in mainline, we should probably allow the
> "legacy" approach to still work.

If there were no DT files which used two SPMI devices, I think we
should drop this comment and use existing helpers. We must keep
compatibility with the existing DTs, not with the _possible_ device
trees.

>
> >
> > Konrad



-- 
With best wishes
Dmitry

Re: [PATCH RFC v3 3/4] spmi: pmic-arb: Make core resources acquiring a version operation

[Abel Vesa]

On 24-02-15 11:30:23, Dmitry Baryshkov wrote:
> On Wed, 14 Feb 2024 at 23:36, Abel Vesa <abel.vesa@linaro.org> wrote:
> >
> > On 24-02-14 22:18:33, Konrad Dybcio wrote:
> > > On 14.02.2024 22:13, Abel Vesa wrote:
> > > > Rather than setting up the core, obsrv and chnls in probe by using
> > > > version specific conditionals, add a dedicated "get_core_resources"
> > > > version specific op and move the acquiring in there.
> > > >
> > > > Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
> > > > ---
> > > >  drivers/spmi/spmi-pmic-arb.c | 111 ++++++++++++++++++++++++++++++-------------
> > > >  1 file changed, 78 insertions(+), 33 deletions(-)
> > > >
> > > > diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
> > > > index 23939c0d225f..489556467a4c 100644
> > > > --- a/drivers/spmi/spmi-pmic-arb.c
> > > > +++ b/drivers/spmi/spmi-pmic-arb.c
> > > > @@ -203,6 +203,7 @@ struct spmi_pmic_arb {
> > > >   */
> > > >  struct pmic_arb_ver_ops {
> > > >     const char *ver_str;
> > > > +   int (*get_core_resources)(struct platform_device *pdev, void __iomem *core);
> > > >     int (*init_apid)(struct spmi_pmic_arb *pmic_arb, int index);
> > > >     int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u16 ppid);
> > > >     /* spmi commands (read_cmd, write_cmd, cmd) functionality */
> > > > @@ -956,6 +957,19 @@ static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb)
> > > >     return 0;
> > > >  }
> > > >
> > > > +static int pmic_arb_get_core_resources_v1(struct platform_device *pdev,
> > > > +                                     void __iomem *core)
> > > > +{
> > > > +   struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
> > > > +
> > > > +   pmic_arb->wr_base = core;
> > > > +   pmic_arb->rd_base = core;
> > > > +
> > > > +   pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
> > > > +
> > > > +   return 0;
> > > > +}
> > > > +
> > > >  static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb, int index)
> > > >  {
> > > >     u32 *mapping_table;
> > > > @@ -1063,6 +1077,41 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid)
> > > >     return apid;
> > > >  }
> > > >
> > > > +static int pmic_arb_get_obsrvr_chnls_v2(struct platform_device *pdev)
> > > > +{
> > > > +   struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
> > > > +   struct device *dev = &pdev->dev;
> > > > +   struct resource *res;
> > > > +
> > > > +   res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> > >
> > > It's no longer indented to deep, no need to keep such aggressive wrapping
> > >
> >
> > The pmic_arb_get_obsrvr_chnls_v2 is used by both:
> > pmic_arb_get_core_resources_v2
> > pmic_arb_get_core_resources_v7
> >
> > > > +                                      "obsrvr");
> > > > +   pmic_arb->rd_base = devm_ioremap(dev, res->start,
> > > > +                                    resource_size(res));
> > > > +   if (IS_ERR(pmic_arb->rd_base))
> > > > +           return PTR_ERR(pmic_arb->rd_base);
> > > > +
> > > > +   res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> > > > +                                      "chnls");
> > > > +   pmic_arb->wr_base = devm_ioremap(dev, res->start,
> > > > +                                    resource_size(res));
> > > > +   if (IS_ERR(pmic_arb->wr_base))
> > > > +           return PTR_ERR(pmic_arb->wr_base);
> > >
> > > Could probably make it "devm_platform_get_and_ioremap_resource "
> >
> > The reason this needs to stay as is is because of reason explained by
> > the following comment found in probe:
> >
> > /*
> >  * Please don't replace this with devm_platform_ioremap_resource() or
> >  * devm_ioremap_resource().  These both result in a call to
> >  * devm_request_mem_region() which prevents multiple mappings of this
> >  * register address range.  SoCs with PMIC arbiter v7 may define two
> >  * arbiter devices, for the two physical SPMI interfaces, which  share
> >  * some register address ranges (i.e. "core", "obsrvr", and "chnls").
> >  * Ensure that both devices probe successfully by calling devm_ioremap()
> >  * which does not result in a devm_request_mem_region() call.
> >  */
> >
> > Even though, AFAICT, there is no platform that adds a second node for
> > the second bus, currently, in mainline, we should probably allow the
> > "legacy" approach to still work.
> 
> If there were no DT files which used two SPMI devices, I think we
> should drop this comment and use existing helpers. We must keep
> compatibility with the existing DTs, not with the _possible_ device
> trees.

Sure.

Should I drop the qcom,bus-id from the driver as well? It is optional
after all.

> 
> >
> > >
> > > Konrad
> 
> 
> 
> -- 
> With best wishes
> Dmitry

Re: [PATCH RFC v3 3/4] spmi: pmic-arb: Make core resources acquiring a version operation

[Dmitry Baryshkov]

On Thu, 15 Feb 2024 at 15:32, Abel Vesa <abel.vesa@linaro.org> wrote:
>
> On 24-02-15 11:30:23, Dmitry Baryshkov wrote:
> > On Wed, 14 Feb 2024 at 23:36, Abel Vesa <abel.vesa@linaro.org> wrote:
> > >
> > > On 24-02-14 22:18:33, Konrad Dybcio wrote:
> > > > On 14.02.2024 22:13, Abel Vesa wrote:
> > > > > Rather than setting up the core, obsrv and chnls in probe by using
> > > > > version specific conditionals, add a dedicated "get_core_resources"
> > > > > version specific op and move the acquiring in there.
> > > > >
> > > > > Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
> > > > > ---
> > > > >  drivers/spmi/spmi-pmic-arb.c | 111 ++++++++++++++++++++++++++++++-------------
> > > > >  1 file changed, 78 insertions(+), 33 deletions(-)
> > > > >
> > > > > diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
> > > > > index 23939c0d225f..489556467a4c 100644
> > > > > --- a/drivers/spmi/spmi-pmic-arb.c
> > > > > +++ b/drivers/spmi/spmi-pmic-arb.c
> > > > > @@ -203,6 +203,7 @@ struct spmi_pmic_arb {
> > > > >   */
> > > > >  struct pmic_arb_ver_ops {
> > > > >     const char *ver_str;
> > > > > +   int (*get_core_resources)(struct platform_device *pdev, void __iomem *core);
> > > > >     int (*init_apid)(struct spmi_pmic_arb *pmic_arb, int index);
> > > > >     int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u16 ppid);
> > > > >     /* spmi commands (read_cmd, write_cmd, cmd) functionality */
> > > > > @@ -956,6 +957,19 @@ static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb)
> > > > >     return 0;
> > > > >  }
> > > > >
> > > > > +static int pmic_arb_get_core_resources_v1(struct platform_device *pdev,
> > > > > +                                     void __iomem *core)
> > > > > +{
> > > > > +   struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
> > > > > +
> > > > > +   pmic_arb->wr_base = core;
> > > > > +   pmic_arb->rd_base = core;
> > > > > +
> > > > > +   pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
> > > > > +
> > > > > +   return 0;
> > > > > +}
> > > > > +
> > > > >  static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb, int index)
> > > > >  {
> > > > >     u32 *mapping_table;
> > > > > @@ -1063,6 +1077,41 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid)
> > > > >     return apid;
> > > > >  }
> > > > >
> > > > > +static int pmic_arb_get_obsrvr_chnls_v2(struct platform_device *pdev)
> > > > > +{
> > > > > +   struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
> > > > > +   struct device *dev = &pdev->dev;
> > > > > +   struct resource *res;
> > > > > +
> > > > > +   res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> > > >
> > > > It's no longer indented to deep, no need to keep such aggressive wrapping
> > > >
> > >
> > > The pmic_arb_get_obsrvr_chnls_v2 is used by both:
> > > pmic_arb_get_core_resources_v2
> > > pmic_arb_get_core_resources_v7
> > >
> > > > > +                                      "obsrvr");
> > > > > +   pmic_arb->rd_base = devm_ioremap(dev, res->start,
> > > > > +                                    resource_size(res));
> > > > > +   if (IS_ERR(pmic_arb->rd_base))
> > > > > +           return PTR_ERR(pmic_arb->rd_base);
> > > > > +
> > > > > +   res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> > > > > +                                      "chnls");
> > > > > +   pmic_arb->wr_base = devm_ioremap(dev, res->start,
> > > > > +                                    resource_size(res));
> > > > > +   if (IS_ERR(pmic_arb->wr_base))
> > > > > +           return PTR_ERR(pmic_arb->wr_base);
> > > >
> > > > Could probably make it "devm_platform_get_and_ioremap_resource "
> > >
> > > The reason this needs to stay as is is because of reason explained by
> > > the following comment found in probe:
> > >
> > > /*
> > >  * Please don't replace this with devm_platform_ioremap_resource() or
> > >  * devm_ioremap_resource().  These both result in a call to
> > >  * devm_request_mem_region() which prevents multiple mappings of this
> > >  * register address range.  SoCs with PMIC arbiter v7 may define two
> > >  * arbiter devices, for the two physical SPMI interfaces, which  share
> > >  * some register address ranges (i.e. "core", "obsrvr", and "chnls").
> > >  * Ensure that both devices probe successfully by calling devm_ioremap()
> > >  * which does not result in a devm_request_mem_region() call.
> > >  */
> > >
> > > Even though, AFAICT, there is no platform that adds a second node for
> > > the second bus, currently, in mainline, we should probably allow the
> > > "legacy" approach to still work.
> >
> > If there were no DT files which used two SPMI devices, I think we
> > should drop this comment and use existing helpers. We must keep
> > compatibility with the existing DTs, not with the _possible_ device
> > trees.
>
> Sure.
>
> Should I drop the qcom,bus-id from the driver as well? It is optional
> after all.

I think so. Let's drop it completely. And for the new sub-devices you
perfectly know the bus ID.

-- 
With best wishes
Dmitry

[PATCH RFC v3 4/4] spmi: pmic-arb: Add multi bus support

[Abel Vesa]

Starting with HW version 7, there are actually two separate buses
(with two separate sets of wires). So in order to support both
buses, we need to register a separate spmi controller for each one.
Add a separate compatible for v7 only, but allow the legacy platforms
that have v7 to still work with the old one, for DT backwards
compatibility.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
---
 drivers/spmi/spmi-pmic-arb.c | 730 +++++++++++++++++++++++++------------------
 1 file changed, 433 insertions(+), 297 deletions(-)

diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index 489556467a4c..9c0ad9342cac 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -13,6 +13,8 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/spmi.h>
@@ -94,6 +96,8 @@ enum pmic_arb_channel {
 	PMIC_ARB_CHANNEL_OBS,
 };
 
+#define PMIC_ARB_MAX_BUSES		2
+
 /* Maximum number of support PMIC peripherals */
 #define PMIC_ARB_MAX_PERIPHS		512
 #define PMIC_ARB_MAX_PERIPHS_V7		1024
@@ -125,58 +129,68 @@ struct apid_data {
 	u8		irq_ee;
 };
 
+struct spmi_pmic_arb;
+
 /**
- * struct spmi_pmic_arb - SPMI PMIC Arbiter object
+ * struct spmi_pmic_arb_bus - SPMI PMIC Arbiter Bus object
  *
- * @rd_base:		on v1 "core", on v2 "observer" register base off DT.
- * @wr_base:		on v1 "core", on v2 "chnls"    register base off DT.
  * @intr:		address of the SPMI interrupt control registers.
  * @cnfg:		address of the PMIC Arbiter configuration registers.
- * @lock:		lock to synchronize accesses.
- * @channel:		execution environment channel to use for accesses.
- * @irq:		PMIC ARB interrupt.
- * @ee:			the current Execution Environment
- * @bus_instance:	on v7: 0 = primary SPMI bus, 1 = secondary SPMI bus
- * @min_apid:		minimum APID (used for bounding IRQ search)
- * @max_apid:		maximum APID
+ * @domain:		irq domain object for PMIC IRQ domain
  * @base_apid:		on v7: minimum APID associated with the particular SPMI
  *			bus instance
  * @apid_count:		on v5 and v7: number of APIDs associated with the
  *			particular SPMI bus instance
  * @mapping_table:	in-memory copy of PPID -> APID mapping table.
- * @domain:		irq domain object for PMIC IRQ domain
- * @spmic:		SPMI controller object
- * @ver_ops:		version dependent operations.
  * @ppid_to_apid:	in-memory copy of PPID -> APID mapping table.
- * @last_apid:		Highest value APID in use
  * @apid_data:		Table of data for all APIDs
+ * @last_apid:		Highest value APID in use
+ * @irq:		PMIC ARB interrupt.
+ */
+struct spmi_pmic_arb_bus {
+	struct spmi_pmic_arb	*pmic_arb;
+	struct irq_domain	*domain;
+	void __iomem		*intr;
+	void __iomem		*cnfg;
+	struct spmi_controller	*spmic;
+	u16			base_apid;
+	int			apid_count;
+	u32			*mapping_table;
+	DECLARE_BITMAP(mapping_table_valid, PMIC_ARB_MAX_PERIPHS);
+	u16			*ppid_to_apid;
+	u16			last_apid;
+	struct apid_data	*apid_data;
+	u16			min_apid;
+	u16			max_apid;
+	int			irq;
+	u8			id;
+};
+
+/**
+ * struct spmi_pmic_arb - SPMI PMIC Arbiter object
+ *
+ * @rd_base:		on v1 "core", on v2 "observer" register base off DT.
+ * @wr_base:		on v1 "core", on v2 "chnls"    register base off DT.
+ * @lock:		lock to synchronize accesses.
+ * @channel:		execution environment channel to use for accesses.
+ * @ee:			the current Execution Environment
+ * @min_apid:		minimum APID (used for bounding IRQ search)
+ * @max_apid:		maximum APID
+ * @ver_ops:		version dependent operations.
  * @max_periphs:	Number of elements in apid_data[]
  */
 struct spmi_pmic_arb {
 	void __iomem		*rd_base;
 	void __iomem		*wr_base;
-	void __iomem		*intr;
-	void __iomem		*cnfg;
 	void __iomem		*core;
 	resource_size_t		core_size;
 	raw_spinlock_t		lock;
 	u8			channel;
-	int			irq;
 	u8			ee;
-	u32			bus_instance;
-	u16			min_apid;
-	u16			max_apid;
-	u16			base_apid;
-	int			apid_count;
-	u32			*mapping_table;
-	DECLARE_BITMAP(mapping_table_valid, PMIC_ARB_MAX_PERIPHS);
-	struct irq_domain	*domain;
-	struct spmi_controller	*spmic;
 	const struct pmic_arb_ver_ops *ver_ops;
-	u16			*ppid_to_apid;
-	u16			last_apid;
-	struct apid_data	*apid_data;
 	int			max_periphs;
+	struct spmi_pmic_arb_bus buses[PMIC_ARB_MAX_BUSES];
+	int			buses_available;
 };
 
 /**
@@ -204,21 +218,21 @@ struct spmi_pmic_arb {
 struct pmic_arb_ver_ops {
 	const char *ver_str;
 	int (*get_core_resources)(struct platform_device *pdev, void __iomem *core);
-	int (*init_apid)(struct spmi_pmic_arb *pmic_arb, int index);
-	int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u16 ppid);
+	int (*init_apid)(struct spmi_pmic_arb_bus *bus, int index);
+	int (*ppid_to_apid)(struct spmi_pmic_arb_bus *bus, u16 ppid);
 	/* spmi commands (read_cmd, write_cmd, cmd) functionality */
-	int (*offset)(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
-			enum pmic_arb_channel ch_type);
+	int (*offset)(struct spmi_pmic_arb_bus *bus, u8 sid, u16 addr,
+		      enum pmic_arb_channel ch_type);
 	u32 (*fmt_cmd)(u8 opc, u8 sid, u16 addr, u8 bc);
 	int (*non_data_cmd)(struct spmi_controller *ctrl, u8 opc, u8 sid);
 	/* Interrupts controller functionality (offset of PIC registers) */
-	void __iomem *(*owner_acc_status)(struct spmi_pmic_arb *pmic_arb, u8 m,
+	void __iomem *(*owner_acc_status)(struct spmi_pmic_arb_bus *bus, u8 m,
 					  u16 n);
-	void __iomem *(*acc_enable)(struct spmi_pmic_arb *pmic_arb, u16 n);
-	void __iomem *(*irq_status)(struct spmi_pmic_arb *pmic_arb, u16 n);
-	void __iomem *(*irq_clear)(struct spmi_pmic_arb *pmic_arb, u16 n);
+	void __iomem *(*acc_enable)(struct spmi_pmic_arb_bus *bus, u16 n);
+	void __iomem *(*irq_status)(struct spmi_pmic_arb_bus *bus, u16 n);
+	void __iomem *(*irq_clear)(struct spmi_pmic_arb_bus *bus, u16 n);
 	u32 (*apid_map_offset)(u16 n);
-	void __iomem *(*apid_owner)(struct spmi_pmic_arb *pmic_arb, u16 n);
+	void __iomem *(*apid_owner)(struct spmi_pmic_arb_bus *bus, u16 n);
 };
 
 static inline void pmic_arb_base_write(struct spmi_pmic_arb *pmic_arb,
@@ -266,13 +280,14 @@ static int pmic_arb_wait_for_done(struct spmi_controller *ctrl,
 				  void __iomem *base, u8 sid, u16 addr,
 				  enum pmic_arb_channel ch_type)
 {
-	struct spmi_pmic_arb *pmic_arb = spmi_controller_get_drvdata(ctrl);
+	struct spmi_pmic_arb_bus *bus = spmi_controller_get_drvdata(ctrl);
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	u32 status = 0;
 	u32 timeout = PMIC_ARB_TIMEOUT_US;
 	u32 offset;
 	int rc;
 
-	rc = pmic_arb->ver_ops->offset(pmic_arb, sid, addr, ch_type);
+	rc = pmic_arb->ver_ops->offset(bus, sid, addr, ch_type);
 	if (rc < 0)
 		return rc;
 
@@ -284,21 +299,21 @@ static int pmic_arb_wait_for_done(struct spmi_controller *ctrl,
 
 		if (status & PMIC_ARB_STATUS_DONE) {
 			if (status & PMIC_ARB_STATUS_DENIED) {
-				dev_err(&ctrl->dev, "%s: %#x %#x: transaction denied (%#x)\n",
-					__func__, sid, addr, status);
+				dev_err(&ctrl->dev, "%s: %#x %#x %#x: transaction denied (%#x)\n",
+					__func__, bus->id, sid, addr, status);
 				return -EPERM;
 			}
 
 			if (status & PMIC_ARB_STATUS_FAILURE) {
-				dev_err(&ctrl->dev, "%s: %#x %#x: transaction failed (%#x)\n",
-					__func__, sid, addr, status);
+				dev_err(&ctrl->dev, "%s: %#x %#x %#x: transaction failed (%#x) reg: 0x%x\n",
+					__func__, bus->id, sid, addr, status, offset);
 				WARN_ON(1);
 				return -EIO;
 			}
 
 			if (status & PMIC_ARB_STATUS_DROPPED) {
-				dev_err(&ctrl->dev, "%s: %#x %#x: transaction dropped (%#x)\n",
-					__func__, sid, addr, status);
+				dev_err(&ctrl->dev, "%s: %#x %#x %#x: transaction dropped (%#x)\n",
+					__func__, bus->id, sid, addr, status);
 				return -EIO;
 			}
 
@@ -307,8 +322,8 @@ static int pmic_arb_wait_for_done(struct spmi_controller *ctrl,
 		udelay(1);
 	}
 
-	dev_err(&ctrl->dev, "%s: %#x %#x: timeout, status %#x\n",
-		__func__, sid, addr, status);
+	dev_err(&ctrl->dev, "%s: %#x %#x %#x: timeout, status %#x\n",
+		__func__, bus->id, sid, addr, status);
 	return -ETIMEDOUT;
 }
 
@@ -316,12 +331,13 @@ static int
 pmic_arb_non_data_cmd_v1(struct spmi_controller *ctrl, u8 opc, u8 sid)
 {
 	struct spmi_pmic_arb *pmic_arb = spmi_controller_get_drvdata(ctrl);
+	struct spmi_pmic_arb_bus *bus = &pmic_arb->buses[0];
 	unsigned long flags;
 	u32 cmd;
 	int rc;
 	u32 offset;
 
-	rc = pmic_arb->ver_ops->offset(pmic_arb, sid, 0, PMIC_ARB_CHANNEL_RW);
+	rc = pmic_arb->ver_ops->offset(bus, sid, 0, PMIC_ARB_CHANNEL_RW);
 	if (rc < 0)
 		return rc;
 
@@ -357,20 +373,21 @@ static int pmic_arb_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid)
 	return pmic_arb->ver_ops->non_data_cmd(ctrl, opc, sid);
 }
 
-static int pmic_arb_fmt_read_cmd(struct spmi_pmic_arb *pmic_arb, u8 opc, u8 sid,
+static int pmic_arb_fmt_read_cmd(struct spmi_pmic_arb_bus *bus, u8 opc, u8 sid,
 				 u16 addr, size_t len, u32 *cmd, u32 *offset)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	u8 bc = len - 1;
 	int rc;
 
-	rc = pmic_arb->ver_ops->offset(pmic_arb, sid, addr,
+	rc = pmic_arb->ver_ops->offset(bus, sid, addr,
 				       PMIC_ARB_CHANNEL_OBS);
 	if (rc < 0)
 		return rc;
 
 	*offset = rc;
 	if (bc >= PMIC_ARB_MAX_TRANS_BYTES) {
-		dev_err(&pmic_arb->spmic->dev, "pmic-arb supports 1..%d bytes per trans, but:%zu requested",
+		dev_err(&bus->spmic->dev, "pmic-arb supports 1..%d bytes per trans, but:%zu requested",
 			PMIC_ARB_MAX_TRANS_BYTES, len);
 		return  -EINVAL;
 	}
@@ -394,7 +411,8 @@ static int pmic_arb_read_cmd_unlocked(struct spmi_controller *ctrl, u32 cmd,
 				      u32 offset, u8 sid, u16 addr, u8 *buf,
 				      size_t len)
 {
-	struct spmi_pmic_arb *pmic_arb = spmi_controller_get_drvdata(ctrl);
+	struct spmi_pmic_arb_bus *bus = spmi_controller_get_drvdata(ctrl);
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	u8 bc = len - 1;
 	int rc;
 
@@ -416,12 +434,13 @@ static int pmic_arb_read_cmd_unlocked(struct spmi_controller *ctrl, u32 cmd,
 static int pmic_arb_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
 			     u16 addr, u8 *buf, size_t len)
 {
-	struct spmi_pmic_arb *pmic_arb = spmi_controller_get_drvdata(ctrl);
+	struct spmi_pmic_arb_bus *bus = spmi_controller_get_drvdata(ctrl);
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	unsigned long flags;
 	u32 cmd, offset;
 	int rc;
 
-	rc = pmic_arb_fmt_read_cmd(pmic_arb, opc, sid, addr, len, &cmd,
+	rc = pmic_arb_fmt_read_cmd(bus, opc, sid, addr, len, &cmd,
 				   &offset);
 	if (rc)
 		return rc;
@@ -433,21 +452,22 @@ static int pmic_arb_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
 	return rc;
 }
 
-static int pmic_arb_fmt_write_cmd(struct spmi_pmic_arb *pmic_arb, u8 opc,
+static int pmic_arb_fmt_write_cmd(struct spmi_pmic_arb_bus *bus, u8 opc,
 				  u8 sid, u16 addr, size_t len, u32 *cmd,
 				  u32 *offset)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	u8 bc = len - 1;
 	int rc;
 
-	rc = pmic_arb->ver_ops->offset(pmic_arb, sid, addr,
+	rc = pmic_arb->ver_ops->offset(bus, sid, addr,
 					PMIC_ARB_CHANNEL_RW);
 	if (rc < 0)
 		return rc;
 
 	*offset = rc;
 	if (bc >= PMIC_ARB_MAX_TRANS_BYTES) {
-		dev_err(&pmic_arb->spmic->dev, "pmic-arb supports 1..%d bytes per trans, but:%zu requested",
+		dev_err(&bus->spmic->dev, "pmic-arb supports 1..%d bytes per trans, but:%zu requested",
 			PMIC_ARB_MAX_TRANS_BYTES, len);
 		return  -EINVAL;
 	}
@@ -473,7 +493,8 @@ static int pmic_arb_write_cmd_unlocked(struct spmi_controller *ctrl, u32 cmd,
 				      u32 offset, u8 sid, u16 addr,
 				      const u8 *buf, size_t len)
 {
-	struct spmi_pmic_arb *pmic_arb = spmi_controller_get_drvdata(ctrl);
+	struct spmi_pmic_arb_bus *bus = spmi_controller_get_drvdata(ctrl);
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	u8 bc = len - 1;
 
 	/* Write data to FIFOs */
@@ -492,12 +513,13 @@ static int pmic_arb_write_cmd_unlocked(struct spmi_controller *ctrl, u32 cmd,
 static int pmic_arb_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
 			      u16 addr, const u8 *buf, size_t len)
 {
-	struct spmi_pmic_arb *pmic_arb = spmi_controller_get_drvdata(ctrl);
+	struct spmi_pmic_arb_bus *bus = spmi_controller_get_drvdata(ctrl);
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	unsigned long flags;
 	u32 cmd, offset;
 	int rc;
 
-	rc = pmic_arb_fmt_write_cmd(pmic_arb, opc, sid, addr, len, &cmd,
+	rc = pmic_arb_fmt_write_cmd(bus, opc, sid, addr, len, &cmd,
 				    &offset);
 	if (rc)
 		return rc;
@@ -513,18 +535,19 @@ static int pmic_arb_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
 static int pmic_arb_masked_write(struct spmi_controller *ctrl, u8 sid, u16 addr,
 				 const u8 *buf, const u8 *mask, size_t len)
 {
-	struct spmi_pmic_arb *pmic_arb = spmi_controller_get_drvdata(ctrl);
+	struct spmi_pmic_arb_bus *bus = spmi_controller_get_drvdata(ctrl);
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	u32 read_cmd, read_offset, write_cmd, write_offset;
 	u8 temp[PMIC_ARB_MAX_TRANS_BYTES];
 	unsigned long flags;
 	int rc, i;
 
-	rc = pmic_arb_fmt_read_cmd(pmic_arb, SPMI_CMD_EXT_READL, sid, addr, len,
+	rc = pmic_arb_fmt_read_cmd(bus, SPMI_CMD_EXT_READL, sid, addr, len,
 				   &read_cmd, &read_offset);
 	if (rc)
 		return rc;
 
-	rc = pmic_arb_fmt_write_cmd(pmic_arb, SPMI_CMD_EXT_WRITEL, sid, addr,
+	rc = pmic_arb_fmt_write_cmd(bus, SPMI_CMD_EXT_WRITEL, sid, addr,
 				    len, &write_cmd, &write_offset);
 	if (rc)
 		return rc;
@@ -567,25 +590,25 @@ struct spmi_pmic_arb_qpnpint_type {
 static void qpnpint_spmi_write(struct irq_data *d, u8 reg, void *buf,
 			       size_t len)
 {
-	struct spmi_pmic_arb *pmic_arb = irq_data_get_irq_chip_data(d);
+	struct spmi_pmic_arb_bus *bus = irq_data_get_irq_chip_data(d);
 	u8 sid = hwirq_to_sid(d->hwirq);
 	u8 per = hwirq_to_per(d->hwirq);
 
-	if (pmic_arb_write_cmd(pmic_arb->spmic, SPMI_CMD_EXT_WRITEL, sid,
+	if (pmic_arb_write_cmd(bus->spmic, SPMI_CMD_EXT_WRITEL, sid,
 			       (per << 8) + reg, buf, len))
-		dev_err_ratelimited(&pmic_arb->spmic->dev, "failed irqchip transaction on %x\n",
+		dev_err_ratelimited(&bus->spmic->dev, "failed irqchip transaction on %x\n",
 				    d->irq);
 }
 
 static void qpnpint_spmi_read(struct irq_data *d, u8 reg, void *buf, size_t len)
 {
-	struct spmi_pmic_arb *pmic_arb = irq_data_get_irq_chip_data(d);
+	struct spmi_pmic_arb_bus *bus = irq_data_get_irq_chip_data(d);
 	u8 sid = hwirq_to_sid(d->hwirq);
 	u8 per = hwirq_to_per(d->hwirq);
 
-	if (pmic_arb_read_cmd(pmic_arb->spmic, SPMI_CMD_EXT_READL, sid,
+	if (pmic_arb_read_cmd(bus->spmic, SPMI_CMD_EXT_READL, sid,
 			      (per << 8) + reg, buf, len))
-		dev_err_ratelimited(&pmic_arb->spmic->dev, "failed irqchip transaction on %x\n",
+		dev_err_ratelimited(&bus->spmic->dev, "failed irqchip transaction on %x\n",
 				    d->irq);
 }
 
@@ -593,47 +616,49 @@ static int qpnpint_spmi_masked_write(struct irq_data *d, u8 reg,
 				     const void *buf, const void *mask,
 				     size_t len)
 {
-	struct spmi_pmic_arb *pmic_arb = irq_data_get_irq_chip_data(d);
+	struct spmi_pmic_arb_bus *bus = irq_data_get_irq_chip_data(d);
 	u8 sid = hwirq_to_sid(d->hwirq);
 	u8 per = hwirq_to_per(d->hwirq);
 	int rc;
 
-	rc = pmic_arb_masked_write(pmic_arb->spmic, sid, (per << 8) + reg, buf,
+	rc = pmic_arb_masked_write(bus->spmic, sid, (per << 8) + reg, buf,
 				   mask, len);
 	if (rc)
-		dev_err_ratelimited(&pmic_arb->spmic->dev, "failed irqchip transaction on %x rc=%d\n",
+		dev_err_ratelimited(&bus->spmic->dev, "failed irqchip transaction on %x rc=%d\n",
 				    d->irq, rc);
 	return rc;
 }
 
-static void cleanup_irq(struct spmi_pmic_arb *pmic_arb, u16 apid, int id)
+static void cleanup_irq(struct spmi_pmic_arb_bus *bus, u16 apid, int id)
 {
-	u16 ppid = pmic_arb->apid_data[apid].ppid;
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
+	u16 ppid = bus->apid_data[apid].ppid;
 	u8 sid = ppid >> 8;
 	u8 per = ppid & 0xFF;
 	u8 irq_mask = BIT(id);
 
-	dev_err_ratelimited(&pmic_arb->spmic->dev, "%s apid=%d sid=0x%x per=0x%x irq=%d\n",
-			__func__, apid, sid, per, id);
-	writel_relaxed(irq_mask, pmic_arb->ver_ops->irq_clear(pmic_arb, apid));
+	dev_err_ratelimited(&bus->spmic->dev, "%s apid=%d sid=0x%x per=0x%x irq=%d\n",
+			    __func__, apid, sid, per, id);
+	writel_relaxed(irq_mask, pmic_arb->ver_ops->irq_clear(bus, apid));
 }
 
-static int periph_interrupt(struct spmi_pmic_arb *pmic_arb, u16 apid)
+static int periph_interrupt(struct spmi_pmic_arb_bus *bus, u16 apid)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	unsigned int irq;
 	u32 status, id;
 	int handled = 0;
-	u8 sid = (pmic_arb->apid_data[apid].ppid >> 8) & 0xF;
-	u8 per = pmic_arb->apid_data[apid].ppid & 0xFF;
+	u8 sid = (bus->apid_data[apid].ppid >> 8) & 0xF;
+	u8 per = bus->apid_data[apid].ppid & 0xFF;
 
-	status = readl_relaxed(pmic_arb->ver_ops->irq_status(pmic_arb, apid));
+	status = readl_relaxed(pmic_arb->ver_ops->irq_status(bus, apid));
 	while (status) {
 		id = ffs(status) - 1;
 		status &= ~BIT(id);
-		irq = irq_find_mapping(pmic_arb->domain,
-					spec_to_hwirq(sid, per, id, apid));
+		irq = irq_find_mapping(bus->domain,
+				       spec_to_hwirq(sid, per, id, apid));
 		if (irq == 0) {
-			cleanup_irq(pmic_arb, apid, id);
+			cleanup_irq(bus, apid, id);
 			continue;
 		}
 		generic_handle_irq(irq);
@@ -645,16 +670,17 @@ static int periph_interrupt(struct spmi_pmic_arb *pmic_arb, u16 apid)
 
 static void pmic_arb_chained_irq(struct irq_desc *desc)
 {
-	struct spmi_pmic_arb *pmic_arb = irq_desc_get_handler_data(desc);
+	struct spmi_pmic_arb_bus *bus = irq_desc_get_handler_data(desc);
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	const struct pmic_arb_ver_ops *ver_ops = pmic_arb->ver_ops;
 	struct irq_chip *chip = irq_desc_get_chip(desc);
-	int first = pmic_arb->min_apid;
-	int last = pmic_arb->max_apid;
+	int first = bus->min_apid;
+	int last = bus->max_apid;
 	/*
 	 * acc_offset will be non-zero for the secondary SPMI bus instance on
 	 * v7 controllers.
 	 */
-	int acc_offset = pmic_arb->base_apid >> 5;
+	int acc_offset = bus->base_apid >> 5;
 	u8 ee = pmic_arb->ee;
 	u32 status, enable, handled = 0;
 	int i, id, apid;
@@ -665,7 +691,7 @@ static void pmic_arb_chained_irq(struct irq_desc *desc)
 	chained_irq_enter(chip, desc);
 
 	for (i = first >> 5; i <= last >> 5; ++i) {
-		status = readl_relaxed(ver_ops->owner_acc_status(pmic_arb, ee, i - acc_offset));
+		status = readl_relaxed(ver_ops->owner_acc_status(bus, ee, i - acc_offset));
 		if (status)
 			acc_valid = true;
 
@@ -679,9 +705,9 @@ static void pmic_arb_chained_irq(struct irq_desc *desc)
 				continue;
 			}
 			enable = readl_relaxed(
-					ver_ops->acc_enable(pmic_arb, apid));
+					ver_ops->acc_enable(bus, apid));
 			if (enable & SPMI_PIC_ACC_ENABLE_BIT)
-				if (periph_interrupt(pmic_arb, apid) != 0)
+				if (periph_interrupt(bus, apid) != 0)
 					handled++;
 		}
 	}
@@ -690,19 +716,19 @@ static void pmic_arb_chained_irq(struct irq_desc *desc)
 	if (!acc_valid) {
 		for (i = first; i <= last; i++) {
 			/* skip if APPS is not irq owner */
-			if (pmic_arb->apid_data[i].irq_ee != pmic_arb->ee)
+			if (bus->apid_data[i].irq_ee != pmic_arb->ee)
 				continue;
 
 			irq_status = readl_relaxed(
-					     ver_ops->irq_status(pmic_arb, i));
+					     ver_ops->irq_status(bus, i));
 			if (irq_status) {
 				enable = readl_relaxed(
-					     ver_ops->acc_enable(pmic_arb, i));
+					     ver_ops->acc_enable(bus, i));
 				if (enable & SPMI_PIC_ACC_ENABLE_BIT) {
-					dev_dbg(&pmic_arb->spmic->dev,
+					dev_dbg(&bus->spmic->dev,
 						"Dispatching IRQ for apid=%d status=%x\n",
 						i, irq_status);
-					if (periph_interrupt(pmic_arb, i) != 0)
+					if (periph_interrupt(bus, i) != 0)
 						handled++;
 				}
 			}
@@ -717,12 +743,13 @@ static void pmic_arb_chained_irq(struct irq_desc *desc)
 
 static void qpnpint_irq_ack(struct irq_data *d)
 {
-	struct spmi_pmic_arb *pmic_arb = irq_data_get_irq_chip_data(d);
+	struct spmi_pmic_arb_bus *bus = irq_data_get_irq_chip_data(d);
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	u8 irq = hwirq_to_irq(d->hwirq);
 	u16 apid = hwirq_to_apid(d->hwirq);
 	u8 data;
 
-	writel_relaxed(BIT(irq), pmic_arb->ver_ops->irq_clear(pmic_arb, apid));
+	writel_relaxed(BIT(irq), pmic_arb->ver_ops->irq_clear(bus, apid));
 
 	data = BIT(irq);
 	qpnpint_spmi_write(d, QPNPINT_REG_LATCHED_CLR, &data, 1);
@@ -738,14 +765,15 @@ static void qpnpint_irq_mask(struct irq_data *d)
 
 static void qpnpint_irq_unmask(struct irq_data *d)
 {
-	struct spmi_pmic_arb *pmic_arb = irq_data_get_irq_chip_data(d);
+	struct spmi_pmic_arb_bus *bus = irq_data_get_irq_chip_data(d);
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	const struct pmic_arb_ver_ops *ver_ops = pmic_arb->ver_ops;
 	u8 irq = hwirq_to_irq(d->hwirq);
 	u16 apid = hwirq_to_apid(d->hwirq);
 	u8 buf[2];
 
 	writel_relaxed(SPMI_PIC_ACC_ENABLE_BIT,
-			ver_ops->acc_enable(pmic_arb, apid));
+			ver_ops->acc_enable(bus, apid));
 
 	qpnpint_spmi_read(d, QPNPINT_REG_EN_SET, &buf[0], 1);
 	if (!(buf[0] & BIT(irq))) {
@@ -802,9 +830,9 @@ static int qpnpint_irq_set_type(struct irq_data *d, unsigned int flow_type)
 
 static int qpnpint_irq_set_wake(struct irq_data *d, unsigned int on)
 {
-	struct spmi_pmic_arb *pmic_arb = irq_data_get_irq_chip_data(d);
+	struct spmi_pmic_arb_bus *bus = irq_data_get_irq_chip_data(d);
 
-	return irq_set_irq_wake(pmic_arb->irq, on);
+	return irq_set_irq_wake(bus->irq, on);
 }
 
 static int qpnpint_get_irqchip_state(struct irq_data *d,
@@ -826,17 +854,18 @@ static int qpnpint_get_irqchip_state(struct irq_data *d,
 static int qpnpint_irq_domain_activate(struct irq_domain *domain,
 				       struct irq_data *d, bool reserve)
 {
-	struct spmi_pmic_arb *pmic_arb = irq_data_get_irq_chip_data(d);
+	struct spmi_pmic_arb_bus *bus = irq_data_get_irq_chip_data(d);
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	u16 periph = hwirq_to_per(d->hwirq);
 	u16 apid = hwirq_to_apid(d->hwirq);
 	u16 sid = hwirq_to_sid(d->hwirq);
 	u16 irq = hwirq_to_irq(d->hwirq);
 	u8 buf;
 
-	if (pmic_arb->apid_data[apid].irq_ee != pmic_arb->ee) {
-		dev_err(&pmic_arb->spmic->dev, "failed to xlate sid = %#x, periph = %#x, irq = %u: ee=%u but owner=%u\n",
+	if (bus->apid_data[apid].irq_ee != pmic_arb->ee) {
+		dev_err(&bus->spmic->dev, "failed to xlate sid = %#x, periph = %#x, irq = %u: ee=%u but owner=%u\n",
 			sid, periph, irq, pmic_arb->ee,
-			pmic_arb->apid_data[apid].irq_ee);
+			bus->apid_data[apid].irq_ee);
 		return -ENODEV;
 	}
 
@@ -863,15 +892,16 @@ static int qpnpint_irq_domain_translate(struct irq_domain *d,
 					unsigned long *out_hwirq,
 					unsigned int *out_type)
 {
-	struct spmi_pmic_arb *pmic_arb = d->host_data;
+	struct spmi_pmic_arb_bus *bus = d->host_data;
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	u32 *intspec = fwspec->param;
 	u16 apid, ppid;
 	int rc;
 
-	dev_dbg(&pmic_arb->spmic->dev, "intspec[0] 0x%1x intspec[1] 0x%02x intspec[2] 0x%02x\n",
+	dev_dbg(&bus->spmic->dev, "intspec[0] 0x%1x intspec[1] 0x%02x intspec[2] 0x%02x\n",
 		intspec[0], intspec[1], intspec[2]);
 
-	if (irq_domain_get_of_node(d) != pmic_arb->spmic->dev.of_node)
+	if (irq_domain_get_of_node(d) != bus->spmic->dev.of_node)
 		return -EINVAL;
 	if (fwspec->param_count != 4)
 		return -EINVAL;
@@ -879,37 +909,38 @@ static int qpnpint_irq_domain_translate(struct irq_domain *d,
 		return -EINVAL;
 
 	ppid = intspec[0] << 8 | intspec[1];
-	rc = pmic_arb->ver_ops->ppid_to_apid(pmic_arb, ppid);
+	rc = pmic_arb->ver_ops->ppid_to_apid(bus, ppid);
 	if (rc < 0) {
-		dev_err(&pmic_arb->spmic->dev, "failed to xlate sid = %#x, periph = %#x, irq = %u rc = %d\n",
-		intspec[0], intspec[1], intspec[2], rc);
+		dev_err(&bus->spmic->dev, "failed to xlate sid = %#x, periph = %#x, irq = %u rc = %d\n",
+			intspec[0], intspec[1], intspec[2], rc);
 		return rc;
 	}
 
 	apid = rc;
 	/* Keep track of {max,min}_apid for bounding search during interrupt */
-	if (apid > pmic_arb->max_apid)
-		pmic_arb->max_apid = apid;
-	if (apid < pmic_arb->min_apid)
-		pmic_arb->min_apid = apid;
+	if (apid > bus->max_apid)
+		bus->max_apid = apid;
+	if (apid < bus->min_apid)
+		bus->min_apid = apid;
 
 	*out_hwirq = spec_to_hwirq(intspec[0], intspec[1], intspec[2], apid);
 	*out_type  = intspec[3] & IRQ_TYPE_SENSE_MASK;
 
-	dev_dbg(&pmic_arb->spmic->dev, "out_hwirq = %lu\n", *out_hwirq);
+	dev_dbg(&bus->spmic->dev, "out_hwirq = %lu\n", *out_hwirq);
 
 	return 0;
 }
 
 static struct lock_class_key qpnpint_irq_lock_class, qpnpint_irq_request_class;
 
-static void qpnpint_irq_domain_map(struct spmi_pmic_arb *pmic_arb,
+static void qpnpint_irq_domain_map(struct spmi_pmic_arb_bus *bus,
 				   struct irq_domain *domain, unsigned int virq,
 				   irq_hw_number_t hwirq, unsigned int type)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	irq_flow_handler_t handler;
 
-	dev_dbg(&pmic_arb->spmic->dev, "virq = %u, hwirq = %lu, type = %u\n",
+	dev_dbg(&bus->spmic->dev, "virq = %u, hwirq = %lu, type = %u\n",
 		virq, hwirq, type);
 
 	if (type & IRQ_TYPE_EDGE_BOTH)
@@ -928,7 +959,7 @@ static int qpnpint_irq_domain_alloc(struct irq_domain *domain,
 				    unsigned int virq, unsigned int nr_irqs,
 				    void *data)
 {
-	struct spmi_pmic_arb *pmic_arb = domain->host_data;
+	struct spmi_pmic_arb_bus *bus = domain->host_data;
 	struct irq_fwspec *fwspec = data;
 	irq_hw_number_t hwirq;
 	unsigned int type;
@@ -939,20 +970,22 @@ static int qpnpint_irq_domain_alloc(struct irq_domain *domain,
 		return ret;
 
 	for (i = 0; i < nr_irqs; i++)
-		qpnpint_irq_domain_map(pmic_arb, domain, virq + i, hwirq + i,
+		qpnpint_irq_domain_map(bus, domain, virq + i, hwirq + i,
 				       type);
 
 	return 0;
 }
 
-static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb)
+static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb_bus *bus)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
+
 	/*
 	 * Initialize max_apid/min_apid to the opposite bounds, during
 	 * the irq domain translation, we are sure to update these
 	 */
-	pmic_arb->max_apid = 0;
-	pmic_arb->min_apid = pmic_arb->max_periphs - 1;
+	bus->max_apid = 0;
+	bus->min_apid = pmic_arb->max_periphs - 1;
 
 	return 0;
 }
@@ -970,43 +1003,44 @@ static int pmic_arb_get_core_resources_v1(struct platform_device *pdev,
 	return 0;
 }
 
-static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb, int index)
+static int pmic_arb_init_apid_v1(struct spmi_pmic_arb_bus *bus, int index)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	u32 *mapping_table;
 
 	if (index) {
-		dev_err(&pmic_arb->spmic->dev, "Unsupported buses count %d detected\n",
+		dev_err(&bus->spmic->dev, "Unsupported buses count %d detected\n",
 			index);
 		return -EINVAL;
 	}
 
-	mapping_table = devm_kcalloc(&pmic_arb->spmic->dev, pmic_arb->max_periphs,
+	mapping_table = devm_kcalloc(&bus->spmic->dev, pmic_arb->max_periphs,
 				     sizeof(*mapping_table), GFP_KERNEL);
 	if (!mapping_table)
 		return -ENOMEM;
 
-	pmic_arb->mapping_table = mapping_table;
+	bus->mapping_table = mapping_table;
 
-	return pmic_arb_init_apid_min_max(pmic_arb);
+	return pmic_arb_init_apid_min_max(bus);
 }
 
-static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pmic_arb, u16 ppid)
+static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb_bus *bus, u16 ppid)
 {
-	u32 *mapping_table = pmic_arb->mapping_table;
+	u32 *mapping_table = bus->mapping_table;
 	int index = 0, i;
 	u16 apid_valid;
 	u16 apid;
 	u32 data;
 
-	apid_valid = pmic_arb->ppid_to_apid[ppid];
+	apid_valid = bus->ppid_to_apid[ppid];
 	if (apid_valid & PMIC_ARB_APID_VALID) {
 		apid = apid_valid & ~PMIC_ARB_APID_VALID;
 		return apid;
 	}
 
 	for (i = 0; i < SPMI_MAPPING_TABLE_TREE_DEPTH; ++i) {
-		if (!test_and_set_bit(index, pmic_arb->mapping_table_valid))
-			mapping_table[index] = readl_relaxed(pmic_arb->cnfg +
+		if (!test_and_set_bit(index, bus->mapping_table_valid))
+			mapping_table[index] = readl_relaxed(bus->cnfg +
 						SPMI_MAPPING_TABLE_REG(index));
 
 		data = mapping_table[index];
@@ -1016,9 +1050,9 @@ static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pmic_arb, u16 ppid)
 				index = SPMI_MAPPING_BIT_IS_1_RESULT(data);
 			} else {
 				apid = SPMI_MAPPING_BIT_IS_1_RESULT(data);
-				pmic_arb->ppid_to_apid[ppid]
+				bus->ppid_to_apid[ppid]
 					= apid | PMIC_ARB_APID_VALID;
-				pmic_arb->apid_data[apid].ppid = ppid;
+				bus->apid_data[apid].ppid = ppid;
 				return apid;
 			}
 		} else {
@@ -1026,9 +1060,9 @@ static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pmic_arb, u16 ppid)
 				index = SPMI_MAPPING_BIT_IS_0_RESULT(data);
 			} else {
 				apid = SPMI_MAPPING_BIT_IS_0_RESULT(data);
-				pmic_arb->ppid_to_apid[ppid]
+				bus->ppid_to_apid[ppid]
 					= apid | PMIC_ARB_APID_VALID;
-				pmic_arb->apid_data[apid].ppid = ppid;
+				bus->apid_data[apid].ppid = ppid;
 				return apid;
 			}
 		}
@@ -1038,24 +1072,26 @@ static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pmic_arb, u16 ppid)
 }
 
 /* v1 offset per ee */
-static int pmic_arb_offset_v1(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
-			enum pmic_arb_channel ch_type)
+static int pmic_arb_offset_v1(struct spmi_pmic_arb_bus *bus, u8 sid, u16 addr,
+			      enum pmic_arb_channel ch_type)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	return 0x800 + 0x80 * pmic_arb->channel;
 }
 
-static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid)
+static u16 pmic_arb_find_apid(struct spmi_pmic_arb_bus *bus, u16 ppid)
 {
-	struct apid_data *apidd = &pmic_arb->apid_data[pmic_arb->last_apid];
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
+	struct apid_data *apidd = &bus->apid_data[bus->last_apid];
 	u32 regval, offset;
 	u16 id, apid;
 
-	for (apid = pmic_arb->last_apid; ; apid++, apidd++) {
+	for (apid = bus->last_apid; ; apid++, apidd++) {
 		offset = pmic_arb->ver_ops->apid_map_offset(apid);
 		if (offset >= pmic_arb->core_size)
 			break;
 
-		regval = readl_relaxed(pmic_arb->ver_ops->apid_owner(pmic_arb,
+		regval = readl_relaxed(pmic_arb->ver_ops->apid_owner(bus,
 								     apid));
 		apidd->irq_ee = SPMI_OWNERSHIP_PERIPH2OWNER(regval);
 		apidd->write_ee = apidd->irq_ee;
@@ -1065,14 +1101,14 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid)
 			continue;
 
 		id = (regval >> 8) & PMIC_ARB_PPID_MASK;
-		pmic_arb->ppid_to_apid[id] = apid | PMIC_ARB_APID_VALID;
+		bus->ppid_to_apid[id] = apid | PMIC_ARB_APID_VALID;
 		apidd->ppid = id;
 		if (id == ppid) {
 			apid |= PMIC_ARB_APID_VALID;
 			break;
 		}
 	}
-	pmic_arb->last_apid = apid & ~PMIC_ARB_APID_VALID;
+	bus->last_apid = apid & ~PMIC_ARB_APID_VALID;
 
 	return apid;
 }
@@ -1112,21 +1148,22 @@ static int pmic_arb_get_core_resources_v2(struct platform_device *pdev,
 	return pmic_arb_get_obsrvr_chnls_v2(pdev);
 }
 
-static int pmic_arb_ppid_to_apid_v2(struct spmi_pmic_arb *pmic_arb, u16 ppid)
+static int pmic_arb_ppid_to_apid_v2(struct spmi_pmic_arb_bus *bus, u16 ppid)
 {
 	u16 apid_valid;
 
-	apid_valid = pmic_arb->ppid_to_apid[ppid];
+	apid_valid = bus->ppid_to_apid[ppid];
 	if (!(apid_valid & PMIC_ARB_APID_VALID))
-		apid_valid = pmic_arb_find_apid(pmic_arb, ppid);
+		apid_valid = pmic_arb_find_apid(bus, ppid);
 	if (!(apid_valid & PMIC_ARB_APID_VALID))
 		return -ENODEV;
 
 	return apid_valid & ~PMIC_ARB_APID_VALID;
 }
 
-static int pmic_arb_read_apid_map_v5(struct spmi_pmic_arb *pmic_arb)
+static int pmic_arb_read_apid_map_v5(struct spmi_pmic_arb_bus *bus)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	struct apid_data *apidd;
 	struct apid_data *prev_apidd;
 	u16 i, apid, ppid, apid_max;
@@ -1148,9 +1185,9 @@ static int pmic_arb_read_apid_map_v5(struct spmi_pmic_arb *pmic_arb)
 	 * where N = number of APIDs supported by the primary bus and
 	 *       M = number of APIDs supported by the secondary bus
 	 */
-	apidd = &pmic_arb->apid_data[pmic_arb->base_apid];
-	apid_max = pmic_arb->base_apid + pmic_arb->apid_count;
-	for (i = pmic_arb->base_apid; i < apid_max; i++, apidd++) {
+	apidd = &bus->apid_data[bus->base_apid];
+	apid_max = bus->base_apid + bus->apid_count;
+	for (i = bus->base_apid; i < apid_max; i++, apidd++) {
 		offset = pmic_arb->ver_ops->apid_map_offset(i);
 		if (offset >= pmic_arb->core_size)
 			break;
@@ -1161,19 +1198,18 @@ static int pmic_arb_read_apid_map_v5(struct spmi_pmic_arb *pmic_arb)
 		ppid = (regval >> 8) & PMIC_ARB_PPID_MASK;
 		is_irq_ee = PMIC_ARB_CHAN_IS_IRQ_OWNER(regval);
 
-		regval = readl_relaxed(pmic_arb->ver_ops->apid_owner(pmic_arb,
-								     i));
+		regval = readl_relaxed(pmic_arb->ver_ops->apid_owner(bus, i));
 		apidd->write_ee = SPMI_OWNERSHIP_PERIPH2OWNER(regval);
 
 		apidd->irq_ee = is_irq_ee ? apidd->write_ee : INVALID_EE;
 
-		valid = pmic_arb->ppid_to_apid[ppid] & PMIC_ARB_APID_VALID;
-		apid = pmic_arb->ppid_to_apid[ppid] & ~PMIC_ARB_APID_VALID;
-		prev_apidd = &pmic_arb->apid_data[apid];
+		valid = bus->ppid_to_apid[ppid] & PMIC_ARB_APID_VALID;
+		apid = bus->ppid_to_apid[ppid] & ~PMIC_ARB_APID_VALID;
+		prev_apidd = &bus->apid_data[apid];
 
 		if (!valid || apidd->write_ee == pmic_arb->ee) {
 			/* First PPID mapping or one for this EE */
-			pmic_arb->ppid_to_apid[ppid] = i | PMIC_ARB_APID_VALID;
+			bus->ppid_to_apid[ppid] = i | PMIC_ARB_APID_VALID;
 		} else if (valid && is_irq_ee &&
 			   prev_apidd->write_ee == pmic_arb->ee) {
 			/*
@@ -1184,42 +1220,43 @@ static int pmic_arb_read_apid_map_v5(struct spmi_pmic_arb *pmic_arb)
 		}
 
 		apidd->ppid = ppid;
-		pmic_arb->last_apid = i;
+		bus->last_apid = i;
 	}
 
 	/* Dump the mapping table for debug purposes. */
-	dev_dbg(&pmic_arb->spmic->dev, "PPID APID Write-EE IRQ-EE\n");
+	dev_dbg(&bus->spmic->dev, "PPID APID Write-EE IRQ-EE\n");
 	for (ppid = 0; ppid < PMIC_ARB_MAX_PPID; ppid++) {
-		apid = pmic_arb->ppid_to_apid[ppid];
+		apid = bus->ppid_to_apid[ppid];
 		if (apid & PMIC_ARB_APID_VALID) {
 			apid &= ~PMIC_ARB_APID_VALID;
-			apidd = &pmic_arb->apid_data[apid];
-			dev_dbg(&pmic_arb->spmic->dev, "%#03X %3u %2u %2u\n",
-			      ppid, apid, apidd->write_ee, apidd->irq_ee);
+			apidd = &bus->apid_data[apid];
+			dev_dbg(&bus->spmic->dev, "%#03X %3u %2u %2u\n",
+				ppid, apid, apidd->write_ee, apidd->irq_ee);
 		}
 	}
 
 	return 0;
 }
 
-static int pmic_arb_ppid_to_apid_v5(struct spmi_pmic_arb *pmic_arb, u16 ppid)
+static int pmic_arb_ppid_to_apid_v5(struct spmi_pmic_arb_bus *bus, u16 ppid)
 {
-	if (!(pmic_arb->ppid_to_apid[ppid] & PMIC_ARB_APID_VALID))
+	if (!(bus->ppid_to_apid[ppid] & PMIC_ARB_APID_VALID))
 		return -ENODEV;
 
-	return pmic_arb->ppid_to_apid[ppid] & ~PMIC_ARB_APID_VALID;
+	return bus->ppid_to_apid[ppid] & ~PMIC_ARB_APID_VALID;
 }
 
 /* v2 offset per ppid and per ee */
-static int pmic_arb_offset_v2(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
-			   enum pmic_arb_channel ch_type)
+static int pmic_arb_offset_v2(struct spmi_pmic_arb_bus *bus, u8 sid, u16 addr,
+			      enum pmic_arb_channel ch_type)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	u16 apid;
 	u16 ppid;
 	int rc;
 
 	ppid = sid << 8 | ((addr >> 8) & 0xFF);
-	rc = pmic_arb_ppid_to_apid_v2(pmic_arb, ppid);
+	rc = pmic_arb_ppid_to_apid_v2(bus, ppid);
 	if (rc < 0)
 		return rc;
 
@@ -1227,33 +1264,34 @@ static int pmic_arb_offset_v2(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
 	return 0x1000 * pmic_arb->ee + 0x8000 * apid;
 }
 
-static int pmic_arb_init_apid_v5(struct spmi_pmic_arb *pmic_arb, int index)
+static int pmic_arb_init_apid_v5(struct spmi_pmic_arb_bus *bus, int index)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	int ret;
 
 	if (index) {
-		dev_err(&pmic_arb->spmic->dev, "Unsupported buses count %d detected\n",
+		dev_err(&bus->spmic->dev, "Unsupported buses count %d detected\n",
 			index);
 		return -EINVAL;
 	}
 
-	pmic_arb->base_apid = 0;
-	pmic_arb->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) &
+	bus->base_apid = 0;
+	bus->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) &
 					   PMIC_ARB_FEATURES_PERIPH_MASK;
 
-	if (pmic_arb->base_apid + pmic_arb->apid_count > pmic_arb->max_periphs) {
-		dev_err(&pmic_arb->spmic->dev, "Unsupported APID count %d detected\n",
-			pmic_arb->base_apid + pmic_arb->apid_count);
+	if (bus->base_apid + bus->apid_count > pmic_arb->max_periphs) {
+		dev_err(&bus->spmic->dev, "Unsupported APID count %d detected\n",
+			bus->base_apid + bus->apid_count);
 		return -EINVAL;
 	}
 
-	ret = pmic_arb_init_apid_min_max(pmic_arb);
+	ret = pmic_arb_init_apid_min_max(bus);
 	if (ret)
 		return ret;
 
-	ret = pmic_arb_read_apid_map_v5(pmic_arb);
+	ret = pmic_arb_read_apid_map_v5(bus);
 	if (ret) {
-		dev_err(&pmic_arb->spmic->dev, "could not read APID->PPID mapping table, rc= %d\n",
+		dev_err(&bus->spmic->dev, "could not read APID->PPID mapping table, rc= %d\n",
 			ret);
 		return ret;
 	}
@@ -1265,15 +1303,16 @@ static int pmic_arb_init_apid_v5(struct spmi_pmic_arb *pmic_arb, int index)
  * v5 offset per ee and per apid for observer channels and per apid for
  * read/write channels.
  */
-static int pmic_arb_offset_v5(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
-			   enum pmic_arb_channel ch_type)
+static int pmic_arb_offset_v5(struct spmi_pmic_arb_bus *bus, u8 sid, u16 addr,
+			      enum pmic_arb_channel ch_type)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	u16 apid;
 	int rc;
 	u32 offset = 0;
 	u16 ppid = (sid << 8) | (addr >> 8);
 
-	rc = pmic_arb_ppid_to_apid_v5(pmic_arb, ppid);
+	rc = pmic_arb_ppid_to_apid_v5(bus, ppid);
 	if (rc < 0)
 		return rc;
 
@@ -1283,8 +1322,8 @@ static int pmic_arb_offset_v5(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
 		offset = 0x10000 * pmic_arb->ee + 0x80 * apid;
 		break;
 	case PMIC_ARB_CHANNEL_RW:
-		if (pmic_arb->apid_data[apid].write_ee != pmic_arb->ee) {
-			dev_err(&pmic_arb->spmic->dev, "disallowed SPMI write to sid=%u, addr=0x%04X\n",
+		if (bus->apid_data[apid].write_ee != pmic_arb->ee) {
+			dev_err(&bus->spmic->dev, "disallowed SPMI write to sid=%u, addr=0x%04X\n",
 				sid, addr);
 			return -EPERM;
 		}
@@ -1311,38 +1350,39 @@ static int pmic_arb_get_core_resources_v7(struct platform_device *pdev,
  * Only v7 supports 2 bus buses. Each bus will get a different apid count,
  * read from different registers.
  */
-static int pmic_arb_init_apid_v7(struct spmi_pmic_arb *pmic_arb, int index)
+static int pmic_arb_init_apid_v7(struct spmi_pmic_arb_bus *bus, int index)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	int ret;
 
 	if (index == 0) {
-		pmic_arb->base_apid = 0;
-		pmic_arb->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) &
+		bus->base_apid = 0;
+		bus->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) &
 						   PMIC_ARB_FEATURES_PERIPH_MASK;
 	} else if (index == 1) {
-		pmic_arb->base_apid = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) &
+		bus->base_apid = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) &
 						  PMIC_ARB_FEATURES_PERIPH_MASK;
-		pmic_arb->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES1) &
+		bus->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES1) &
 						   PMIC_ARB_FEATURES_PERIPH_MASK;
 	} else {
-		dev_err(&pmic_arb->spmic->dev, "Unsupported buses count %d detected\n",
-			index);
+		dev_err(&bus->spmic->dev, "Unsupported buses count %d detected\n",
+			bus->id);
 		return -EINVAL;
 	}
 
-	if (pmic_arb->base_apid + pmic_arb->apid_count > pmic_arb->max_periphs) {
-		dev_err(&pmic_arb->spmic->dev, "Unsupported APID count %d detected\n",
-			pmic_arb->base_apid + pmic_arb->apid_count);
+	if (bus->base_apid + bus->apid_count > pmic_arb->max_periphs) {
+		dev_err(&bus->spmic->dev, "Unsupported APID count %d detected\n",
+			bus->base_apid + bus->apid_count);
 		return -EINVAL;
 	}
 
-	ret = pmic_arb_init_apid_min_max(pmic_arb);
+	ret = pmic_arb_init_apid_min_max(bus);
 	if (ret)
 		return ret;
 
-	ret = pmic_arb_read_apid_map_v5(pmic_arb);
+	ret = pmic_arb_read_apid_map_v5(bus);
 	if (ret) {
-		dev_err(&pmic_arb->spmic->dev, "could not read APID->PPID mapping table, rc= %d\n",
+		dev_err(&bus->spmic->dev, "could not read APID->PPID mapping table, rc= %d\n",
 			ret);
 		return ret;
 	}
@@ -1354,15 +1394,16 @@ static int pmic_arb_init_apid_v7(struct spmi_pmic_arb *pmic_arb, int index)
  * v7 offset per ee and per apid for observer channels and per apid for
  * read/write channels.
  */
-static int pmic_arb_offset_v7(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
-			   enum pmic_arb_channel ch_type)
+static int pmic_arb_offset_v7(struct spmi_pmic_arb_bus *bus, u8 sid, u16 addr,
+			      enum pmic_arb_channel ch_type)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	u16 apid;
 	int rc;
 	u32 offset = 0;
 	u16 ppid = (sid << 8) | (addr >> 8);
 
-	rc = pmic_arb->ver_ops->ppid_to_apid(pmic_arb, ppid);
+	rc = pmic_arb->ver_ops->ppid_to_apid(bus, ppid);
 	if (rc < 0)
 		return rc;
 
@@ -1372,8 +1413,8 @@ static int pmic_arb_offset_v7(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
 		offset = 0x8000 * pmic_arb->ee + 0x20 * apid;
 		break;
 	case PMIC_ARB_CHANNEL_RW:
-		if (pmic_arb->apid_data[apid].write_ee != pmic_arb->ee) {
-			dev_err(&pmic_arb->spmic->dev, "disallowed SPMI write to sid=%u, addr=0x%04X\n",
+		if (bus->apid_data[apid].write_ee != pmic_arb->ee) {
+			dev_err(&bus->spmic->dev, "disallowed SPMI write to sid=%u, addr=0x%04X\n",
 				sid, addr);
 			return -EPERM;
 		}
@@ -1395,104 +1436,110 @@ static u32 pmic_arb_fmt_cmd_v2(u8 opc, u8 sid, u16 addr, u8 bc)
 }
 
 static void __iomem *
-pmic_arb_owner_acc_status_v1(struct spmi_pmic_arb *pmic_arb, u8 m, u16 n)
+pmic_arb_owner_acc_status_v1(struct spmi_pmic_arb_bus *bus, u8 m, u16 n)
 {
-	return pmic_arb->intr + 0x20 * m + 0x4 * n;
+	return bus->intr + 0x20 * m + 0x4 * n;
 }
 
 static void __iomem *
-pmic_arb_owner_acc_status_v2(struct spmi_pmic_arb *pmic_arb, u8 m, u16 n)
+pmic_arb_owner_acc_status_v2(struct spmi_pmic_arb_bus *bus, u8 m, u16 n)
 {
-	return pmic_arb->intr + 0x100000 + 0x1000 * m + 0x4 * n;
+	return bus->intr + 0x100000 + 0x1000 * m + 0x4 * n;
 }
 
 static void __iomem *
-pmic_arb_owner_acc_status_v3(struct spmi_pmic_arb *pmic_arb, u8 m, u16 n)
+pmic_arb_owner_acc_status_v3(struct spmi_pmic_arb_bus *bus, u8 m, u16 n)
 {
-	return pmic_arb->intr + 0x200000 + 0x1000 * m + 0x4 * n;
+	return bus->intr + 0x200000 + 0x1000 * m + 0x4 * n;
 }
 
 static void __iomem *
-pmic_arb_owner_acc_status_v5(struct spmi_pmic_arb *pmic_arb, u8 m, u16 n)
+pmic_arb_owner_acc_status_v5(struct spmi_pmic_arb_bus *bus, u8 m, u16 n)
 {
-	return pmic_arb->intr + 0x10000 * m + 0x4 * n;
+	return bus->intr + 0x10000 * m + 0x4 * n;
 }
 
 static void __iomem *
-pmic_arb_owner_acc_status_v7(struct spmi_pmic_arb *pmic_arb, u8 m, u16 n)
+pmic_arb_owner_acc_status_v7(struct spmi_pmic_arb_bus *bus, u8 m, u16 n)
 {
-	return pmic_arb->intr + 0x1000 * m + 0x4 * n;
+	return bus->intr + 0x1000 * m + 0x4 * n;
 }
 
 static void __iomem *
-pmic_arb_acc_enable_v1(struct spmi_pmic_arb *pmic_arb, u16 n)
+pmic_arb_acc_enable_v1(struct spmi_pmic_arb_bus *bus, u16 n)
 {
-	return pmic_arb->intr + 0x200 + 0x4 * n;
+	return bus->intr + 0x200 + 0x4 * n;
 }
 
 static void __iomem *
-pmic_arb_acc_enable_v2(struct spmi_pmic_arb *pmic_arb, u16 n)
+pmic_arb_acc_enable_v2(struct spmi_pmic_arb_bus *bus, u16 n)
 {
-	return pmic_arb->intr + 0x1000 * n;
+	return bus->intr + 0x1000 * n;
 }
 
 static void __iomem *
-pmic_arb_acc_enable_v5(struct spmi_pmic_arb *pmic_arb, u16 n)
+pmic_arb_acc_enable_v5(struct spmi_pmic_arb_bus *bus, u16 n)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	return pmic_arb->wr_base + 0x100 + 0x10000 * n;
 }
 
 static void __iomem *
-pmic_arb_acc_enable_v7(struct spmi_pmic_arb *pmic_arb, u16 n)
+pmic_arb_acc_enable_v7(struct spmi_pmic_arb_bus *bus, u16 n)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	return pmic_arb->wr_base + 0x100 + 0x1000 * n;
 }
 
 static void __iomem *
-pmic_arb_irq_status_v1(struct spmi_pmic_arb *pmic_arb, u16 n)
+pmic_arb_irq_status_v1(struct spmi_pmic_arb_bus *bus, u16 n)
 {
-	return pmic_arb->intr + 0x600 + 0x4 * n;
+	return bus->intr + 0x600 + 0x4 * n;
 }
 
 static void __iomem *
-pmic_arb_irq_status_v2(struct spmi_pmic_arb *pmic_arb, u16 n)
+pmic_arb_irq_status_v2(struct spmi_pmic_arb_bus *bus, u16 n)
 {
-	return pmic_arb->intr + 0x4 + 0x1000 * n;
+	return bus->intr + 0x4 + 0x1000 * n;
 }
 
 static void __iomem *
-pmic_arb_irq_status_v5(struct spmi_pmic_arb *pmic_arb, u16 n)
+pmic_arb_irq_status_v5(struct spmi_pmic_arb_bus *bus, u16 n)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	return pmic_arb->wr_base + 0x104 + 0x10000 * n;
 }
 
 static void __iomem *
-pmic_arb_irq_status_v7(struct spmi_pmic_arb *pmic_arb, u16 n)
+pmic_arb_irq_status_v7(struct spmi_pmic_arb_bus *bus, u16 n)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	return pmic_arb->wr_base + 0x104 + 0x1000 * n;
 }
 
 static void __iomem *
-pmic_arb_irq_clear_v1(struct spmi_pmic_arb *pmic_arb, u16 n)
+pmic_arb_irq_clear_v1(struct spmi_pmic_arb_bus *bus, u16 n)
 {
-	return pmic_arb->intr + 0xA00 + 0x4 * n;
+	return bus->intr + 0xA00 + 0x4 * n;
 }
 
 static void __iomem *
-pmic_arb_irq_clear_v2(struct spmi_pmic_arb *pmic_arb, u16 n)
+pmic_arb_irq_clear_v2(struct spmi_pmic_arb_bus *bus, u16 n)
 {
-	return pmic_arb->intr + 0x8 + 0x1000 * n;
+	return bus->intr + 0x8 + 0x1000 * n;
 }
 
 static void __iomem *
-pmic_arb_irq_clear_v5(struct spmi_pmic_arb *pmic_arb, u16 n)
+pmic_arb_irq_clear_v5(struct spmi_pmic_arb_bus *bus, u16 n)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	return pmic_arb->wr_base + 0x108 + 0x10000 * n;
 }
 
 static void __iomem *
-pmic_arb_irq_clear_v7(struct spmi_pmic_arb *pmic_arb, u16 n)
+pmic_arb_irq_clear_v7(struct spmi_pmic_arb_bus *bus, u16 n)
 {
+	struct spmi_pmic_arb *pmic_arb = bus->pmic_arb;
 	return pmic_arb->wr_base + 0x108 + 0x1000 * n;
 }
 
@@ -1512,9 +1559,9 @@ static u32 pmic_arb_apid_map_offset_v7(u16 n)
 }
 
 static void __iomem *
-pmic_arb_apid_owner_v2(struct spmi_pmic_arb *pmic_arb, u16 n)
+pmic_arb_apid_owner_v2(struct spmi_pmic_arb_bus *bus, u16 n)
 {
-	return pmic_arb->cnfg + 0x700 + 0x4 * n;
+	return bus->cnfg + 0x700 + 0x4 * n;
 }
 
 /*
@@ -1523,9 +1570,9 @@ pmic_arb_apid_owner_v2(struct spmi_pmic_arb *pmic_arb, u16 n)
  * 0.
  */
 static void __iomem *
-pmic_arb_apid_owner_v7(struct spmi_pmic_arb *pmic_arb, u16 n)
+pmic_arb_apid_owner_v7(struct spmi_pmic_arb_bus *bus, u16 n)
 {
-	return pmic_arb->cnfg + 0x4 * (n - pmic_arb->base_apid);
+	return  bus->cnfg + 0x4 * (n - bus->base_apid);
 }
 
 static const struct pmic_arb_ver_ops pmic_arb_v1 = {
@@ -1615,21 +1662,152 @@ static const struct irq_domain_ops pmic_arb_irq_domain_ops = {
 	.translate = qpnpint_irq_domain_translate,
 };
 
+static int spmi_pmic_arb_bus_init(struct platform_device *pdev,
+				  struct device_node *node,
+				  struct spmi_pmic_arb *pmic_arb)
+{
+	int bus_index = pmic_arb->buses_available;
+	struct spmi_pmic_arb_bus *bus = &pmic_arb->buses[bus_index];
+	struct device *dev = &pdev->dev;
+	struct spmi_controller *ctrl;
+	void __iomem *intr;
+	void __iomem *cnfg;
+	int index, ret;
+	u32 irq;
+
+	ctrl = devm_spmi_controller_alloc(dev, sizeof(*ctrl));
+	if (IS_ERR(ctrl))
+		return PTR_ERR(ctrl);
+
+	ctrl->cmd = pmic_arb_cmd;
+	ctrl->read_cmd = pmic_arb_read_cmd;
+	ctrl->write_cmd = pmic_arb_write_cmd;
+
+	bus = spmi_controller_get_drvdata(ctrl);
+	bus->spmic = ctrl;
+
+	bus->ppid_to_apid = devm_kcalloc(dev, PMIC_ARB_MAX_PPID,
+					 sizeof(*bus->ppid_to_apid),
+					 GFP_KERNEL);
+	if (!bus->ppid_to_apid)
+		return -ENOMEM;
+
+	bus->apid_data = devm_kcalloc(dev, pmic_arb->max_periphs,
+				      sizeof(*bus->apid_data),
+				      GFP_KERNEL);
+	if (!bus->apid_data)
+		return -ENOMEM;
+
+	/* Optional property for v7: */
+	of_property_read_u32(node, "qcom,bus-id", &bus_index);
+
+	index = of_property_match_string(node, "reg-names", "cnfg");
+	if (index < 0) {
+		dev_err(dev, "cnfg reg region missing");
+		return -EINVAL;
+	}
+
+	cnfg = devm_of_iomap(dev, node, index, NULL);
+	if (IS_ERR(cnfg))
+		return PTR_ERR(cnfg);
+
+	index = of_property_match_string(node, "reg-names", "intr");
+	if (index < 0) {
+		dev_err(dev, "intr reg region missing");
+		return -EINVAL;
+	}
+
+	intr = devm_of_iomap(dev, node, index, NULL);
+	if (IS_ERR(intr))
+		return PTR_ERR(intr);
+
+	irq = of_irq_get_byname(node, "periph_irq");
+	if (irq < 0)
+		return irq;
+
+	bus->pmic_arb = pmic_arb;
+	bus->intr = intr;
+	bus->cnfg = cnfg;
+	bus->irq = irq;
+	bus->id = bus_index;
+
+	ret = pmic_arb->ver_ops->init_apid(bus, bus_index);
+	if (ret)
+		return ret;
+
+	dev_dbg(&pdev->dev, "adding irq domain for bus %d\n", bus_index);
+
+	bus->domain = irq_domain_add_tree(dev->of_node,
+					  &pmic_arb_irq_domain_ops, bus);
+	if (!bus->domain) {
+		dev_err(&pdev->dev, "unable to create irq_domain\n");
+		return -ENOMEM;
+	}
+
+	irq_set_chained_handler_and_data(bus->irq,
+					 pmic_arb_chained_irq, bus);
+
+	bus->spmic->dev.of_node = node;
+	dev_set_name(&bus->spmic->dev, "spmi-%d", bus_index);
+
+	ret = devm_spmi_controller_add(dev, bus->spmic);
+	if (ret)
+		return ret;
+
+	pmic_arb->buses_available++;
+
+	return 0;
+}
+
+static int spmi_pmic_arb_register_buses(struct spmi_pmic_arb *pmic_arb,
+					struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *node = dev->of_node;
+	struct device_node *child;
+	int ret;
+
+	/* legacy mode doesn't provide child node for the bus */
+	if (of_device_is_compatible(node, "qcom,spmi-pmic-arb-v7")) {
+		for_each_available_child_of_node(node, child) {
+			if (of_node_name_eq(child, "spmi")) {
+				ret = spmi_pmic_arb_bus_init(pdev, child, pmic_arb);
+				if (ret)
+					return ret;
+			}
+		}
+	} else {
+		ret = spmi_pmic_arb_bus_init(pdev, node, pmic_arb);
+	}
+
+	return ret;
+}
+
+static void spmi_pmic_arb_deregister_buses(struct spmi_pmic_arb *pmic_arb)
+{
+	int i;
+
+	for (i = 0; i < PMIC_ARB_MAX_BUSES; i++) {
+		struct spmi_pmic_arb_bus *bus = &pmic_arb->buses[i];
+
+		irq_set_chained_handler_and_data(bus->irq,
+						 NULL, NULL);
+		irq_domain_remove(bus->domain);
+	}
+}
+
 static int spmi_pmic_arb_probe(struct platform_device *pdev)
 {
 	struct spmi_pmic_arb *pmic_arb;
-	struct spmi_controller *ctrl;
+	struct device *dev = &pdev->dev;
 	struct resource *res;
 	void __iomem *core;
 	u32 channel, ee, hw_ver;
 	int err;
 
-	ctrl = devm_spmi_controller_alloc(&pdev->dev, sizeof(*pmic_arb));
-	if (IS_ERR(ctrl))
-		return PTR_ERR(ctrl);
-
-	pmic_arb = spmi_controller_get_drvdata(ctrl);
-	pmic_arb->spmic = ctrl;
+	pmic_arb = devm_kzalloc(dev, sizeof(*pmic_arb), GFP_KERNEL);
+	if (!pmic_arb)
+		return -ENOMEM;
 
 	/*
 	 * Please don't replace this with devm_platform_ioremap_resource() or
@@ -1642,12 +1820,15 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
 	 * which does not result in a devm_request_mem_region() call.
 	 */
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "core");
-	core = devm_ioremap(&ctrl->dev, res->start, resource_size(res));
+	core = devm_ioremap(dev, res->start, resource_size(res));
 	if (IS_ERR(core))
 		return PTR_ERR(core);
 
 	pmic_arb->core_size = resource_size(res);
 
+	platform_set_drvdata(pdev, pmic_arb);
+	raw_spin_lock_init(&pmic_arb->lock);
+
 	hw_ver = readl_relaxed(core + PMIC_ARB_VERSION);
 
 	if (hw_ver < PMIC_ARB_VERSION_V2_MIN)
@@ -1661,30 +1842,12 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
 	else
 		pmic_arb->ver_ops = &pmic_arb_v7;
 
-	dev_info(&ctrl->dev, "PMIC arbiter version %s (0x%x)\n",
-		 pmic_arb->ver_ops->ver_str, hw_ver);
-
 	err = pmic_arb->ver_ops->get_core_resources(pdev, core);
 	if (err)
 		return err;
 
-	err = pmic_arb->ver_ops->init_apid(pmic_arb, 0);
-	if (err)
-		return err;
-
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "intr");
-	pmic_arb->intr = devm_ioremap_resource(&ctrl->dev, res);
-	if (IS_ERR(pmic_arb->intr))
-		return PTR_ERR(pmic_arb->intr);
-
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cnfg");
-	pmic_arb->cnfg = devm_ioremap_resource(&ctrl->dev, res);
-	if (IS_ERR(pmic_arb->cnfg))
-		return PTR_ERR(pmic_arb->cnfg);
-
-	pmic_arb->irq = platform_get_irq_byname(pdev, "periph_irq");
-	if (pmic_arb->irq < 0)
-		return pmic_arb->irq;
+	dev_info(dev, "PMIC arbiter version %s (0x%x)\n",
+		 pmic_arb->ver_ops->ver_str, hw_ver);
 
 	err = of_property_read_u32(pdev->dev.of_node, "qcom,channel", &channel);
 	if (err) {
@@ -1713,46 +1876,19 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
 
 	pmic_arb->ee = ee;
 
-	platform_set_drvdata(pdev, ctrl);
-	raw_spin_lock_init(&pmic_arb->lock);
-
-	ctrl->cmd = pmic_arb_cmd;
-	ctrl->read_cmd = pmic_arb_read_cmd;
-	ctrl->write_cmd = pmic_arb_write_cmd;
-
-	dev_dbg(&pdev->dev, "adding irq domain\n");
-	pmic_arb->domain = irq_domain_add_tree(pdev->dev.of_node,
-					 &pmic_arb_irq_domain_ops, pmic_arb);
-	if (!pmic_arb->domain) {
-		dev_err(&pdev->dev, "unable to create irq_domain\n");
-		return -ENOMEM;
-	}
-
-	irq_set_chained_handler_and_data(pmic_arb->irq, pmic_arb_chained_irq,
-					pmic_arb);
-	err = spmi_controller_add(ctrl);
-	if (err)
-		goto err_domain_remove;
-
-	return 0;
-
-err_domain_remove:
-	irq_set_chained_handler_and_data(pmic_arb->irq, NULL, NULL);
-	irq_domain_remove(pmic_arb->domain);
-	return err;
+	return spmi_pmic_arb_register_buses(pmic_arb, pdev);
 }
 
 static void spmi_pmic_arb_remove(struct platform_device *pdev)
 {
-	struct spmi_controller *ctrl = platform_get_drvdata(pdev);
-	struct spmi_pmic_arb *pmic_arb = spmi_controller_get_drvdata(ctrl);
-	spmi_controller_remove(ctrl);
-	irq_set_chained_handler_and_data(pmic_arb->irq, NULL, NULL);
-	irq_domain_remove(pmic_arb->domain);
+	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
+
+	spmi_pmic_arb_deregister_buses(pmic_arb);
 }
 
 static const struct of_device_id spmi_pmic_arb_match_table[] = {
 	{ .compatible = "qcom,spmi-pmic-arb", },
+	{ .compatible = "qcom,spmi-pmic-arb-v7", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, spmi_pmic_arb_match_table);

-- 
2.34.1