linux-kernel - [PATCH v2 1/2] phy: qualcomm: eusb2-repeater: Fix the regfields for multiple instances

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Date: Fri, 05 Jan 2024 12:16:16 +0200
From: Abel Vesa <abel.vesa@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>, Vinod Koul <vkoul@...nel.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>
Cc: Elliot Berman <quic_eberman@...cinc.com>, linux-arm-msm@...r.kernel.org, 
 linux-phy@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Abel Vesa <abel.vesa@...aro.org>
Subject: [PATCH v2 1/2] phy: qualcomm: eusb2-repeater: Fix the regfields
 for multiple instances

The global regmap fields offsets currently get incremented with the base
address of the repeater. This issue doesn't get noticed unless the probe
defers or there are multiple repeaters on that platform. So instead of
incrementing the global ones, copy them for each instance of the
repeater.

Fixes: 4ba2e52718c0 ("phy: qualcomm: phy-qcom-eusb2-repeater: Use regmap_fields")
Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
---
 drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c b/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
index a623f092b11f..5f5862a68b73 100644
--- a/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
+++ b/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
@@ -101,6 +101,7 @@ struct eusb2_repeater {
 	struct regmap_field *regs[F_NUM_FIELDS];
 	struct phy *phy;
 	struct regulator_bulk_data *vregs;
+	struct reg_field *regfields;
 	const struct eusb2_repeater_cfg *cfg;
 	enum phy_mode mode;
 };
@@ -140,8 +141,8 @@ static int eusb2_repeater_init_vregs(struct eusb2_repeater *rptr)
 
 static int eusb2_repeater_init(struct phy *phy)
 {
-	struct reg_field *regfields = eusb2_repeater_tune_reg_fields;
 	struct eusb2_repeater *rptr = phy_get_drvdata(phy);
+	struct reg_field *regfields = rptr->regfields;
 	struct device_node *np = rptr->dev->of_node;
 	u32 init_tbl[F_NUM_TUNE_FIELDS] = { 0 };
 	u8 override;
@@ -262,15 +263,21 @@ static int eusb2_repeater_probe(struct platform_device *pdev)
 	if (!regmap)
 		return -ENODEV;
 
+	rptr->regfields = devm_kmemdup(dev, eusb2_repeater_tune_reg_fields,
+				       sizeof(eusb2_repeater_tune_reg_fields),
+				       GFP_KERNEL);
+	if (!rptr->regfields)
+		return -ENOMEM;
+
 	ret = of_property_read_u32(np, "reg", &res);
 	if (ret < 0)
 		return ret;
 
 	for (i = 0; i < F_NUM_FIELDS; i++)
-		eusb2_repeater_tune_reg_fields[i].reg += res;
+		rptr->regfields[i].reg += res;
 
 	ret = devm_regmap_field_bulk_alloc(dev, regmap, rptr->regs,
-					   eusb2_repeater_tune_reg_fields,
+					   rptr->regfields,
 					   F_NUM_FIELDS);
 	if (ret)
 		return ret;

-- 
2.34.1