linux-kernel - [PATCH v3 04/15] hwspinlock: qcom: add support for MMIO on older SoCs

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Date:   Fri,  9 Sep 2022 11:20:24 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Ohad Ben-Cohen <ohad@...ery.com>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Vinod Koul <vkoul@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-remoteproc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH v3 04/15] 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@...aro.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