1 files changed, 119 insertions, 0 deletions
diff --git a/drivers/phy/samsung/phy-exynos-dp-video.c b/drivers/phy/samsung/phy-exynos-dp-video.c
new file mode 100644
index 000000000..2b670ef91
--- /dev/null
+++ b/drivers/phy/samsung/phy-exynos-dp-video.c
@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Samsung Exynos SoC series Display Port PHY driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Author: Jingoo Han <jg1.han@samsung.com>
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/soc/samsung/exynos-regs-pmu.h>
+
+struct exynos_dp_video_phy_drvdata {
+	u32 phy_ctrl_offset;
+};
+
+struct exynos_dp_video_phy {
+	struct regmap *regs;
+	const struct exynos_dp_video_phy_drvdata *drvdata;
+};
+
+static int exynos_dp_video_phy_power_on(struct phy *phy)
+{
+	struct exynos_dp_video_phy *state = phy_get_drvdata(phy);
+
+	/* Disable power isolation on DP-PHY */
+	return regmap_update_bits(state->regs, state->drvdata->phy_ctrl_offset,
+				  EXYNOS4_PHY_ENABLE, EXYNOS4_PHY_ENABLE);
+}
+
+static int exynos_dp_video_phy_power_off(struct phy *phy)
+{
+	struct exynos_dp_video_phy *state = phy_get_drvdata(phy);
+
+	/* Enable power isolation on DP-PHY */
+	return regmap_update_bits(state->regs, state->drvdata->phy_ctrl_offset,
+				  EXYNOS4_PHY_ENABLE, 0);
+}
+
+static const struct phy_ops exynos_dp_video_phy_ops = {
+	.power_on	= exynos_dp_video_phy_power_on,
+	.power_off	= exynos_dp_video_phy_power_off,
+	.owner		= THIS_MODULE,
+};
+
+static const struct exynos_dp_video_phy_drvdata exynos5250_dp_video_phy = {
+	.phy_ctrl_offset	= EXYNOS5_DPTX_PHY_CONTROL,
+};
+
+static const struct exynos_dp_video_phy_drvdata exynos5420_dp_video_phy = {
+	.phy_ctrl_offset	= EXYNOS5420_DPTX_PHY_CONTROL,
+};
+
+static const struct of_device_id exynos_dp_video_phy_of_match[] = {
+	{
+		.compatible = "samsung,exynos5250-dp-video-phy",
+		.data = &exynos5250_dp_video_phy,
+	}, {
+		.compatible = "samsung,exynos5420-dp-video-phy",
+		.data = &exynos5420_dp_video_phy,
+	},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, exynos_dp_video_phy_of_match);
+
+static int exynos_dp_video_phy_probe(struct platform_device *pdev)
+{
+	struct exynos_dp_video_phy *state;
+	struct device *dev = &pdev->dev;
+	struct phy_provider *phy_provider;
+	struct phy *phy;
+
+	state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
+	if (!state)
+		return -ENOMEM;
+
+	state->regs = syscon_regmap_lookup_by_phandle(dev->of_node,
+						      "samsung,pmu-syscon");
+	if (IS_ERR(state->regs)) {
+		dev_err(dev, "Failed to lookup PMU regmap\n");
+		return PTR_ERR(state->regs);
+	}
+
+	state->drvdata = of_device_get_match_data(dev);
+
+	phy = devm_phy_create(dev, NULL, &exynos_dp_video_phy_ops);
+	if (IS_ERR(phy)) {
+		dev_err(dev, "failed to create Display Port PHY\n");
+		return PTR_ERR(phy);
+	}
+	phy_set_drvdata(phy, state);
+
+	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+
+	return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static struct platform_driver exynos_dp_video_phy_driver = {
+	.probe	= exynos_dp_video_phy_probe,
+	.driver = {
+		.name	= "exynos-dp-video-phy",
+		.of_match_table	= exynos_dp_video_phy_of_match,
+		.suppress_bind_attrs = true,
+	}
+};
+module_platform_driver(exynos_dp_video_phy_driver);
+
+MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
+MODULE_DESCRIPTION("Samsung Exynos SoC DP PHY driver");
+MODULE_LICENSE("GPL v2");