0002-ODROID-XU4-regulator-s2mps11-add-ethernet-power-rese.patch

From 7582d63d8b164269417f8e4b7006f01f2ec97853 Mon Sep 17 00:00:00 2001
From: memeka <mihailescu2m@gmail.com>
Date: Fri, 18 Jan 2019 14:36:21 +1030
Subject: [PATCH 15/75] ODROID-XU4: regulator: s2mps11: add ethernet power
 reset in shutdown function

Ethernet device cannot be detected on warm boot sometimes. This patch is
to add the power reset routines for ethernet device using PMIC. Then
ethernet device can be reset hardware-wise.

Change-Id: Iffbe2966da7e4679f63b91ab79241167391792df
Signed-off-by: Brian Kim <brian.kim@hardkernel.com>
Signed-off-by: Marian Mihailescu <mihailescu2m@gmail.com>
---
 drivers/regulator/s2mps11.c | 54 +++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c
index 8d340f760232..9239d4f303cc 100644
--- a/drivers/regulator/s2mps11.c
+++ b/drivers/regulator/s2mps11.c
@@ -1117,6 +1117,57 @@ static const struct regulator_desc s2mpu02_regulators[] = {
 	regulator_desc_s2mpu02_buck7(7),
 };
 
+static int s2mps11_pmic_ethonoff(struct platform_device *pdev, bool onoff)
+{
+	struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+	unsigned int reg_val = 0;
+	int ret = 0;
+
+	ret = regmap_read(iodev->regmap_pmic, S2MPS11_REG_L15CTRL, &reg_val);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to read S2MPS11_REG_L15CTRL value\n");
+		return ret;
+	}
+
+	ret = regmap_read(iodev->regmap_pmic, S2MPS11_REG_L17CTRL, &reg_val);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to read S2MPS11_REG_L17CTRL value\n");
+		return ret;
+	}
+
+	if (onoff) {
+		/* ETH VDD0 ON */
+		ret = regmap_update_bits(iodev->regmap_pmic, S2MPS11_REG_L15CTRL, 0xFF, 0x72);
+		if (ret) {
+			dev_err(&pdev->dev, "cannot update S2MPS11 LDO CTRL15 register\n");
+			return ret;
+		}
+
+		/* ETH VDD1 ON */
+		ret = regmap_update_bits(iodev->regmap_pmic, S2MPS11_REG_L17CTRL, 0xFF, 0x72);
+		if (ret) {
+			dev_err(&pdev->dev, "cannot update S2MPS11 LDO CTRL17 register\n");
+			return ret;
+		}
+	} else {
+		/* ETH VDD0 OFF */
+		ret = regmap_update_bits(iodev->regmap_pmic, S2MPS11_REG_L15CTRL, 0x3F, 0x00);
+		if (ret) {
+			dev_err(&pdev->dev, "cannot update S2MPS11 LDO CTRL15 register\n");
+			return ret;
+		}
+
+		/* ETH VDD1 OFF */
+		ret = regmap_update_bits(iodev->regmap_pmic, S2MPS11_REG_L17CTRL, 0x3F, 0x00);
+		if (ret) {
+			dev_err(&pdev->dev, "cannot update S2MPS11 LDO CTRL17 register\n");
+			return ret;
+		}
+	}
+
+	return ret;
+}
+
 static int s2mps11_pmic_probe(struct platform_device *pdev)
 {
 	struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
@@ -1248,6 +1299,9 @@ static void s2mps11_pmic_shutdown(struct platform_device *pdev)
 					 "could not write S2MPS11_REG_CTRL1 value\n");
 		}
 	}
+	s2mps11_pmic_ethonoff(pdev, false);
+	mdelay(10);
+	s2mps11_pmic_ethonoff(pdev, true);
 }
 
 static const struct platform_device_id s2mps11_pmic_id[] = {
-- 
2.25.1