linux-kernel - [PATCH 3/4] soc: qcom: llcc: add errata to get bank num

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Message-ID: <20240903-qcs8300_llcc_driver-v1-3-228659bdf067@quicinc.com>
Date: Tue, 3 Sep 2024 14:21:31 +0800
From: Jingyi Wang <quic_jingyw@...cinc.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio
	<konradybcio@...nel.org>,
        Conor Dooley <conor@...nel.org>, Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>
CC: <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Jingyi Wang <quic_jingyw@...cinc.com>
Subject: [PATCH 3/4] soc: qcom: llcc: add errata to get bank num

Use "num-banks" property to indicate the actual num of banks for
errata.

Signed-off-by: Jingyi Wang <quic_jingyw@...cinc.com>
---
 drivers/soc/qcom/llcc-qcom.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/soc/qcom/llcc-qcom.c b/drivers/soc/qcom/llcc-qcom.c
index 8fa4ffd3a9b5..3fb45e625d82 100644
--- a/drivers/soc/qcom/llcc-qcom.c
+++ b/drivers/soc/qcom/llcc-qcom.c
@@ -1275,12 +1275,17 @@ static int qcom_llcc_probe(struct platform_device *pdev)
 		goto err;
 	cfg = &cfgs->llcc_config[cfg_index];
 
-	ret = regmap_read(regmap, cfg->reg_offset[LLCC_COMMON_STATUS0], &num_banks);
-	if (ret)
-		goto err;
+	if (unlikely(!of_property_read_u32(dev->of_node, "num-banks", &num_banks))) {
+		/* errata: get num of llcc banks. */
+	} else {
+		ret = regmap_read(regmap, cfg->reg_offset[LLCC_COMMON_STATUS0], &num_banks);
+		if (ret)
+			goto err;
+
+		num_banks &= LLCC_LB_CNT_MASK;
+		num_banks >>= LLCC_LB_CNT_SHIFT;
+	}
 
-	num_banks &= LLCC_LB_CNT_MASK;
-	num_banks >>= LLCC_LB_CNT_SHIFT;
 	drv_data->num_banks = num_banks;
 
 	drv_data->regmaps = devm_kcalloc(dev, num_banks, sizeof(*drv_data->regmaps), GFP_KERNEL);

-- 
2.25.1