Commit c636eef2 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

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
parents 617e7481 35efb0e1

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

deleted100644 → 0
+0 −39
Original line number Diff line number Diff line 
Qualcomm Hardware Mutex Block:



The hardware block provides mutexes utilized between different processors on

the SoC as part of the communication protocol used by these processors.



- compatible:

	Usage: required

	Value type: <string>

	Definition: must be one of:

		    "qcom,sfpb-mutex",

		    "qcom,tcsr-mutex"



- syscon:

	Usage: required

	Value type: <prop-encoded-array>

	Definition: one cell containing:

		    syscon phandle

		    offset of the hwmutex block within the syscon

		    stride of the hwmutex registers



- #hwlock-cells:

	Usage: required

	Value type: <u32>

	Definition: must be 1, the specified cell represent the lock id

		    (hwlock standard property, see hwlock.txt)



Example:



	tcsr_mutex_block: syscon@fd484000 {

		compatible = "syscon";

		reg = <0xfd484000 0x2000>;

	};



	hwlock@fd484000 {

		compatible = "qcom,tcsr-mutex";

		syscon = <&tcsr_mutex_block 0 0x80>;



		#hwlock-cells = <1>;

	};

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

0 → 100644
+42 −0
Original line number Diff line number Diff line 
# 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 <bjorn.andersson@linaro.org>



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>;

        };

...

drivers/hwspinlock/Kconfig

+4 −6
Original line number Diff line number Diff line
@@ -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.
@@ -52,7 +50,6 @@ 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.
@@ -60,7 +57,6 @@ config HWSPINLOCK_STM32 


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
@@ -68,3 +64,5 @@ config HSEM_U8500 
	  SoC.



	  If unsure, say N.



endif # HWSPINLOCK

drivers/hwspinlock/qcom_hwspinlock.c

+54 −16
Original line number Diff line number Diff line
@@ -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)

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