};
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)