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ODROID-XU4: Reset Ethernet properly on reboot (#1488) (#2108)

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Stefan Agner 2022-09-02 23:34:16 +02:00 committed by GitHub
parent 79c9e208ca
commit c1e2d655bc
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1 changed files with 94 additions and 0 deletions
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buildroot-external/board/hardkernel/odroid-xu4/patches/linux/0001-ODROID-XU4-regulator-s2mps11-add-ethernet-power-rese.patch Normal file
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@ -0,0 +1,94 @@
From 1fb890d987088f5b6b4c165d8d05480e15b8882e Mon Sep 17 00:00:00 2001
Message-Id: <1fb890d987088f5b6b4c165d8d05480e15b8882e.1662147854.git.stefan@agner.ch>
From: memeka <mihailescu2m@gmail.com>
Date: Fri, 18 Jan 2019 14:36:21 +1030
Subject: [PATCH] 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 | 55 +++++++++++++++++++++++++++++++++++++
1 file changed, 55 insertions(+)
diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c
index ebc67e3ddd4f..51f128076db9 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);
@@ -1219,6 +1270,10 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
}
}
+ dev_info(&pdev->dev, "Resetting Ethernet\n");
+ s2mps11_pmic_ethonoff(pdev, false);
+ mdelay(10);
+ s2mps11_pmic_ethonoff(pdev, true);
out:
kfree(rdata);
--
2.37.2