Merge tag 'hwlock-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc

Pull hwspinlock updates from Bjorn Andersson:
 "This introduces a new DT binding format to describe the Qualcomm
  hardware mutex block and deprecates the old, invalid, one.

  It also cleans up the Kconfig slightly"

* tag 'hwlock-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc:
  dt-bindings: hwlock: qcom: Remove invalid binding
  hwspinlock: qcom: Allow mmio usage in addition to syscon
  dt-bindings: hwlock: qcom: Allow device on mmio bus
  dt-bindings: hwlock: qcom: Migrate binding to YAML
  hwspinlock: Simplify Kconfig

Author: torvalds

Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.txt

@@ -0,0 +1,42 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwlock/qcom-hwspinlock.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Hardware Mutex Block
+
+maintainers:
+  - Bjorn Andersson <[email protected]>
+
+description:
+  The hardware block provides mutexes utilized between different processors on
+  the SoC as part of the communication protocol used by these processors.
+
+properties:
+  compatible:
+    enum:
+      - qcom,sfpb-mutex
+      - qcom,tcsr-mutex
+
+  reg:
+    maxItems: 1
+
+  '#hwlock-cells':
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - '#hwlock-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+        tcsr_mutex: hwlock@1f40000 {
+                compatible = "qcom,tcsr-mutex";
+                reg = <0x01f40000 0x40000>;
+                #hwlock-cells = <1>;
+        };
+...

Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml

@@ -6,9 +6,10 @@
 menuconfig HWSPINLOCK
 	bool "Hardware Spinlock drivers"
 
+if HWSPINLOCK
+
 config HWSPINLOCK_OMAP
 	tristate "OMAP Hardware Spinlock device"
-	depends on HWSPINLOCK
 	depends on ARCH_OMAP4 || SOC_OMAP5 || SOC_DRA7XX || SOC_AM33XX || SOC_AM43XX || ARCH_K3 || COMPILE_TEST
 	help
 	  Say y here to support the OMAP Hardware Spinlock device (firstly
@@ -18,7 +19,6 @@ config HWSPINLOCK_OMAP
 
 config HWSPINLOCK_QCOM
 	tristate "Qualcomm Hardware Spinlock device"
-	depends on HWSPINLOCK
 	depends on ARCH_QCOM || COMPILE_TEST
 	select MFD_SYSCON
 	help
@@ -30,7 +30,6 @@ config HWSPINLOCK_QCOM
 
 config HWSPINLOCK_SIRF
 	tristate "SIRF Hardware Spinlock device"
-	depends on HWSPINLOCK
 	depends on ARCH_SIRF || COMPILE_TEST
 	help
 	  Say y here to support the SIRF Hardware Spinlock device, which
@@ -43,7 +42,6 @@ config HWSPINLOCK_SIRF
 config HWSPINLOCK_SPRD
 	tristate "SPRD Hardware Spinlock device"
 	depends on ARCH_SPRD || COMPILE_TEST
-	depends on HWSPINLOCK
 	help
 	  Say y here to support the SPRD Hardware Spinlock device.
 
@@ -52,19 +50,19 @@ config HWSPINLOCK_SPRD
 config HWSPINLOCK_STM32
 	tristate "STM32 Hardware Spinlock device"
 	depends on MACH_STM32MP157 || COMPILE_TEST
-	depends on HWSPINLOCK
 	help
 	  Say y here to support the STM32 Hardware Spinlock device.
 
 	  If unsure, say N.
 
 config HSEM_U8500
 	tristate "STE Hardware Semaphore functionality"
-	depends on HWSPINLOCK
 	depends on ARCH_U8500 || COMPILE_TEST
 	help
 	  Say y here to support the STE Hardware Semaphore functionality, which
 	  provides a synchronisation mechanism for the various processor on the
 	  SoC.
 
 	  If unsure, say N.
+
+endif # HWSPINLOCK

drivers/hwspinlock/Kconfig

@@ -70,41 +70,79 @@ static const struct of_device_id qcom_hwspinlock_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, qcom_hwspinlock_of_match);
 
-static int qcom_hwspinlock_probe(struct platform_device *pdev)
+static struct regmap *qcom_hwspinlock_probe_syscon(struct platform_device *pdev,
+						   u32 *base, u32 *stride)
 {
-	struct hwspinlock_device *bank;
 	struct device_node *syscon;
-	struct reg_field field;
 	struct regmap *regmap;
-	size_t array_size;
-	u32 stride;
-	u32 base;
 	int ret;
-	int i;
 
 	syscon = of_parse_phandle(pdev->dev.of_node, "syscon", 0);
-	if (!syscon) {
-		dev_err(&pdev->dev, "no syscon property\n");
-		return -ENODEV;
-	}
+	if (!syscon)
+		return ERR_PTR(-ENODEV);
 
 	regmap = syscon_node_to_regmap(syscon);
 	of_node_put(syscon);
 	if (IS_ERR(regmap))
-		return PTR_ERR(regmap);
+		return regmap;
 
-	ret = of_property_read_u32_index(pdev->dev.of_node, "syscon", 1, &base);
+	ret = of_property_read_u32_index(pdev->dev.of_node, "syscon", 1, base);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "no offset in syscon\n");
-		return -EINVAL;
+		return ERR_PTR(-EINVAL);
 	}
 
-	ret = of_property_read_u32_index(pdev->dev.of_node, "syscon", 2, &stride);
+	ret = of_property_read_u32_index(pdev->dev.of_node, "syscon", 2, stride);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "no stride syscon\n");
-		return -EINVAL;
+		return ERR_PTR(-EINVAL);
 	}
 
+	return regmap;
+}
+
+static const struct regmap_config tcsr_mutex_config = {
+	.reg_bits		= 32,
+	.reg_stride		= 4,
+	.val_bits		= 32,
+	.max_register		= 0x40000,
+	.fast_io		= true,
+};
+
+static struct regmap *qcom_hwspinlock_probe_mmio(struct platform_device *pdev,
+						 u32 *offset, u32 *stride)
+{
+	struct device *dev = &pdev->dev;
+	void __iomem *base;
+
+	/* All modern platform has offset 0 and stride of 4k */
+	*offset = 0;
+	*stride = 0x1000;
+
+	base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(base))
+		return ERR_CAST(base);
+
+	return devm_regmap_init_mmio(dev, base, &tcsr_mutex_config);
+}
+
+static int qcom_hwspinlock_probe(struct platform_device *pdev)
+{
+	struct hwspinlock_device *bank;
+	struct reg_field field;
+	struct regmap *regmap;
+	size_t array_size;
+	u32 stride;
+	u32 base;
+	int i;
+
+	regmap = qcom_hwspinlock_probe_syscon(pdev, &base, &stride);
+	if (IS_ERR(regmap) && PTR_ERR(regmap) == -ENODEV)
+		regmap = qcom_hwspinlock_probe_mmio(pdev, &base, &stride);
+
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
 	array_size = QCOM_MUTEX_NUM_LOCKS * sizeof(struct hwspinlock);
 	bank = devm_kzalloc(&pdev->dev, sizeof(*bank) + array_size, GFP_KERNEL);
 	if (!bank)