hwspinlock: qcom: add support for MMIO on older SoCs

Older Qualcomm SoCs have TCSR mutex registers with 0x80 stride, instead
of 0x1000.  Add dedicated compatibles and regmap for such case.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220909092035.223915-5-krzysztof.kozlowski@linaro.org

diff --git a/drivers/hwspinlock/qcom_hwspinlock.c b/drivers/hwspinlock/qcom_hwspinlock.c
index 9734e14..9cf1863 100644 (file)
--- a/drivers/hwspinlock/qcom_hwspinlock.c
+++ b/drivers/hwspinlock/qcom_hwspinlock.c
@@ -22,6 +22,7 @@
 struct qcom_hwspinlock_of_data {
        u32 offset;
        u32 stride;
+       const struct regmap_config *regmap_config;
 };
 
 static int qcom_hwspinlock_trylock(struct hwspinlock *lock)
@@ -73,15 +74,42 @@ static const struct qcom_hwspinlock_of_data of_sfpb_mutex = {
        .stride = 0x4,
 };
 
-/* All modern platform has offset 0 and stride of 4k */
+static const struct regmap_config tcsr_msm8226_mutex_config = {
+       .reg_bits               = 32,
+       .reg_stride             = 4,
+       .val_bits               = 32,
+       .max_register           = 0x1000,
+       .fast_io                = true,
+};
+
+static const struct qcom_hwspinlock_of_data of_msm8226_tcsr_mutex = {
+       .offset = 0,
+       .stride = 0x80,
+       .regmap_config = &tcsr_msm8226_mutex_config,
+};
+
+static const struct regmap_config tcsr_mutex_config = {
+       .reg_bits               = 32,
+       .reg_stride             = 4,
+       .val_bits               = 32,
+       .max_register           = 0x20000,
+       .fast_io                = true,
+};
+
 static const struct qcom_hwspinlock_of_data of_tcsr_mutex = {
        .offset = 0,
        .stride = 0x1000,
+       .regmap_config = &tcsr_mutex_config,
 };
 
 static const struct of_device_id qcom_hwspinlock_of_match[] = {
        { .compatible = "qcom,sfpb-mutex", .data = &of_sfpb_mutex },
        { .compatible = "qcom,tcsr-mutex", .data = &of_tcsr_mutex },
+       { .compatible = "qcom,apq8084-tcsr-mutex", .data = &of_msm8226_tcsr_mutex },
+       { .compatible = "qcom,ipq6018-tcsr-mutex", .data = &of_msm8226_tcsr_mutex },
+       { .compatible = "qcom,msm8226-tcsr-mutex", .data = &of_msm8226_tcsr_mutex },
+       { .compatible = "qcom,msm8974-tcsr-mutex", .data = &of_msm8226_tcsr_mutex },
+       { .compatible = "qcom,msm8994-tcsr-mutex", .data = &of_msm8226_tcsr_mutex },
        { }
 };
 MODULE_DEVICE_TABLE(of, qcom_hwspinlock_of_match);
@@ -117,14 +145,6 @@ static struct regmap *qcom_hwspinlock_probe_syscon(struct platform_device *pdev,
        return regmap;
 }
 
-static const struct regmap_config tcsr_mutex_config = {
-       .reg_bits               = 32,
-       .reg_stride             = 4,
-       .val_bits               = 32,
-       .max_register           = 0x20000,
-       .fast_io                = true,
-};
-
 static struct regmap *qcom_hwspinlock_probe_mmio(struct platform_device *pdev,
                                                 u32 *offset, u32 *stride)
 {
@@ -133,6 +153,8 @@ static struct regmap *qcom_hwspinlock_probe_mmio(struct platform_device *pdev,
        void __iomem *base;
 
        data = of_device_get_match_data(dev);
+       if (!data->regmap_config)
+               return ERR_PTR(-EINVAL);
 
        *offset = data->offset;
        *stride = data->stride;
@@ -141,7 +163,7 @@ static struct regmap *qcom_hwspinlock_probe_mmio(struct platform_device *pdev,
        if (IS_ERR(base))
                return ERR_CAST(base);
 
-       return devm_regmap_init_mmio(dev, base, &tcsr_mutex_config);
+       return devm_regmap_init_mmio(dev, base, data->regmap_config);
 }
 
 static int qcom_hwspinlock_probe(struct platform_device *pdev)