diff --git a/drivers/hwspinlock/qcom_hwspinlock.c b/drivers/hwspinlock/qcom_hwspinlock.c index f0da544b14d2..364710966665 100644 --- a/drivers/hwspinlock/qcom_hwspinlock.c +++ b/drivers/hwspinlock/qcom_hwspinlock.c @@ -70,41 +70,79 @@ static const struct of_device_id qcom_hwspinlock_of_match[] = { }; MODULE_DEVICE_TABLE(of, qcom_hwspinlock_of_match); +static struct regmap *qcom_hwspinlock_probe_syscon(struct platform_device *pdev, + u32 *base, u32 *stride) +{ + struct device_node *syscon; + struct regmap *regmap; + int ret; + + syscon = of_parse_phandle(pdev->dev.of_node, "syscon", 0); + if (!syscon) + return ERR_PTR(-ENODEV); + + regmap = syscon_node_to_regmap(syscon); + of_node_put(syscon); + if (IS_ERR(regmap)) + return regmap; + + 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 ERR_PTR(-EINVAL); + } + + 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 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 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; - } + regmap = qcom_hwspinlock_probe_syscon(pdev, &base, &stride); + if (IS_ERR(regmap) && PTR_ERR(regmap) == -ENODEV) + regmap = qcom_hwspinlock_probe_mmio(pdev, &base, &stride); - regmap = syscon_node_to_regmap(syscon); - of_node_put(syscon); if (IS_ERR(regmap)) return PTR_ERR(regmap); - 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; - } - - 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; - } - array_size = QCOM_MUTEX_NUM_LOCKS * sizeof(struct hwspinlock); bank = devm_kzalloc(&pdev->dev, sizeof(*bank) + array_size, GFP_KERNEL); if (!bank)