[RFT PATCH v2 06/17] hwspinlock: qcom: add support for MMIO on older SoCs

Krzysztof Kozlowski
2022-08-17T15:00:22Z

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>
---
drivers/hwspinlock/qcom_hwspinlock.c | 42 +++++++++++++++++++++-------
1 file changed, 32 insertions(+), 10 deletions(-)

diff --git a/drivers/hwspinlock/qcom_hwspinlock.c b/drivers/hwspinlock/qcom_hwspinlock.c
index 9734e149d981..9cf186362ae2 100644
--- 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)
--
2.34.1