[PATCH v4 1/3] phy: Add exynos-simple-phy driver
From: Rahul Sharma
Date: Thu May 15 2014 - 09:13:16 EST
From: Tomasz Stanislawski <t.stanislaws@xxxxxxxxxxx>
Add exynos-simple-phy driver to support a single register
PHY interfaces present on Exynos4 SoC.
Signed-off-by: Tomasz Stanislawski <t.stanislaws@xxxxxxxxxxx>
Signed-off-by: Rahul Sharma <Rahul.Sharma@xxxxxxxxxxx>
---
.../devicetree/bindings/phy/samsung-phy.txt | 57 ++++++
drivers/phy/Kconfig | 5 +
drivers/phy/Makefile | 1 +
drivers/phy/phy-exynos-simple.c | 189 ++++++++++++++++++++
include/dt-bindings/phy/phy-exynos-simple.h | 22 +++
5 files changed, 274 insertions(+)
create mode 100644 drivers/phy/phy-exynos-simple.c
create mode 100644 include/dt-bindings/phy/phy-exynos-simple.h
diff --git a/Documentation/devicetree/bindings/phy/samsung-phy.txt b/Documentation/devicetree/bindings/phy/samsung-phy.txt
index 2049261..a8d95d6 100644
--- a/Documentation/devicetree/bindings/phy/samsung-phy.txt
+++ b/Documentation/devicetree/bindings/phy/samsung-phy.txt
@@ -161,3 +161,60 @@ Example:
usbdrdphy0 = &usb3_phy0;
usbdrdphy1 = &usb3_phy1;
};
+
+Samsung S5P/EXYNOS SoC series SIMPLE PHY
+-------------------------------------------------
+
+Required properties:
+- compatible : should be one of the listed compatibles:
+ - "samsung,exynos4210-simple-phy"
+ - "samsung,exynos4412-simple-phy"
+ - "samsung,exynos5250-simple-phy"
+ - "samsung,exynos5420-simple-phy"
+- samsung,pmureg-phandle - handle to syscon to control PMU registers
+- #phy-cells : from the generic phy bindings, must be 1;
+
+For a compatible PHY, the single cell specifier should be one of these
+listed values:
+
+ PHY_EXYNOS_SIMPLE_HDMI 0
+ PHY_EXYNOS_SIMPLE_DAC 1
+ PHY_EXYNOS_SIMPLE_ADC 2
+ PHY_EXYNOS_SIMPLE_PCIE 3
+ PHY_EXYNOS_SIMPLE_SATA 4
+
+List of supported PHYs for compatible "samsung,exynos4210-simple-phy" are:
+ PHY_EXYNOS_SIMPLE_HDMI,
+ PHY_EXYNOS_SIMPLE_DAC,
+ PHY_EXYNOS_SIMPLE_ADC,
+ PHY_EXYNOS_SIMPLE_PCIE,
+ PHY_EXYNOS_SIMPLE_SATA.
+
+List of supported PHYs for compatible "samsung,exynos4412-simple-phy" are:
+ PHY_EXYNOS_SIMPLE_HDMI,
+ PHY_EXYNOS_SIMPLE_ADC.
+
+List of supported PHYs for compatible "samsung,exynos5250-simple-phy" are:
+ PHY_EXYNOS_SIMPLE_HDMI,
+ PHY_EXYNOS_SIMPLE_ADC,
+ PHY_EXYNOS_SIMPLE_SATA.
+
+List of supported PHYs for compatible "samsung,exynos5420-simple-phy" are:
+ PHY_EXYNOS_SIMPLE_HDMI,
+ PHY_EXYNOS_SIMPLE_ADC.
+
+Example:
+Simple PHY provider node:
+
+ simplephys: simple-phys {
+ compatible = "samsung,exynos5250-simple-phy";
+ samsung,pmu-syscon = <&pmu_system_controller>;
+ #phy-cells = <1>;
+ };
+
+Other nodes accessing simple PHYs:
+
+ hdmi {
+ phys = <&simplephys PHY_EXYNOS_SIMPLE_HDMI>;
+ phy-names = "hdmiphy";
+ };
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 16a2f06..c306ff2 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -178,4 +178,9 @@ config PHY_XGENE
help
This option enables support for APM X-Gene SoC multi-purpose PHY.
+config PHY_EXYNOS_SIMPLE
+ tristate "Exynos Simple PHY driver"
+ help
+ Support for 1-bit PHY controllers on SoCs from Exynos family.
+
endmenu
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index b4f1d57..cdf0b65 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_GENERIC_PHY) += phy-core.o
obj-$(CONFIG_BCM_KONA_USB2_PHY) += phy-bcm-kona-usb2.o
obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o
obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o
+obj-$(CONFIG_PHY_EXYNOS_SIMPLE) += phy-exynos-simple.o
obj-$(CONFIG_PHY_MVEBU_SATA) += phy-mvebu-sata.o
obj-$(CONFIG_OMAP_CONTROL_PHY) += phy-omap-control.o
obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o
diff --git a/drivers/phy/phy-exynos-simple.c b/drivers/phy/phy-exynos-simple.c
new file mode 100644
index 0000000..77fc3f7
--- /dev/null
+++ b/drivers/phy/phy-exynos-simple.c
@@ -0,0 +1,189 @@
+/*
+ * Exynos Simple PHY driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Author: Tomasz Stanislawski <t.stanislaws@xxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/phy/phy-exynos-simple.h>
+
+#define EXYNOS_PHY_ENABLE (1 << 0)
+#define INVALID (~1)
+#define PHY_NR 5
+
+struct phy_driver_priv {
+ struct phy *phys[PHY_NR];
+ struct regmap *pmureg;
+ u32 offsets[PHY_NR];
+};
+
+struct phy_driver_data {
+ u32 index;
+ u32 offset;
+};
+
+struct phy_private {
+ struct regmap *pmureg;
+ u32 offset;
+};
+
+static int exynos_phy_power_on(struct phy *phy)
+{
+ struct phy_private *phy_private = phy_get_drvdata(phy);
+
+ return regmap_update_bits(phy_private->pmureg, phy_private->offset,
+ EXYNOS_PHY_ENABLE, 1);
+}
+
+static int exynos_phy_power_off(struct phy *phy)
+{
+ struct phy_private *phy_private = phy_get_drvdata(phy);
+
+ return regmap_update_bits(phy_private->pmureg, phy_private->offset,
+ EXYNOS_PHY_ENABLE, 0);
+}
+
+static struct phy_ops exynos_phy_ops = {
+ .power_on = exynos_phy_power_on,
+ .power_off = exynos_phy_power_off,
+ .owner = THIS_MODULE,
+};
+
+static const struct phy_driver_data exynos4210_offsets[] = {
+ { PHY_EXYNOS_SIMPLE_HDMI, 0x0700 }, /* HDMI_PHY */
+ { PHY_EXYNOS_SIMPLE_DAC, 0x070C }, /* DAC_PHY */
+ { PHY_EXYNOS_SIMPLE_ADC, 0x0718 }, /* ADC_PHY */
+ { PHY_EXYNOS_SIMPLE_PCIE, 0x071C }, /* PCIE_PHY */
+ { PHY_EXYNOS_SIMPLE_SATA, 0x0720 }, /* SATA_PHY */
+ { INVALID, 0 }, /* End Mark */
+};
+
+static const struct phy_driver_data exynos4412_offsets[] = {
+ { PHY_EXYNOS_SIMPLE_HDMI, 0x0700 }, /* HDMI_PHY */
+ { PHY_EXYNOS_SIMPLE_ADC, 0x0718 }, /* ADC_PHY */
+ { INVALID, 0 }, /* End Mark */
+};
+
+static const struct phy_driver_data exynos5250_offsets[] = {
+ { PHY_EXYNOS_SIMPLE_HDMI, 0x0700 }, /* HDMI_PHY */
+ { PHY_EXYNOS_SIMPLE_ADC, 0x0718 }, /* ADC_PHY */
+ { PHY_EXYNOS_SIMPLE_SATA, 0x0724 }, /* SATA_PHY */
+ { INVALID, 0 }, /* End Mark */
+};
+
+static const struct phy_driver_data exynos5420_offsets[] = {
+ { PHY_EXYNOS_SIMPLE_HDMI, 0x0700 }, /* HDMI_PHY */
+ { PHY_EXYNOS_SIMPLE_ADC, 0x0720 }, /* ADC_PHY */
+ { INVALID, 0 }, /* End Mark */
+};
+
+static const struct of_device_id exynos_phy_of_match[] = {
+ { .compatible = "samsung,exynos4210-simple-phy",
+ .data = exynos4210_offsets},
+ { .compatible = "samsung,exynos4412-simple-phy",
+ .data = exynos4412_offsets},
+ { .compatible = "samsung,exynos5250-simple-phy",
+ .data = exynos5250_offsets},
+ { .compatible = "samsung,exynos5420-simple-phy",
+ .data = exynos5420_offsets},
+ { },
+};
+MODULE_DEVICE_TABLE(of, exynos_phy_of_match);
+
+static struct phy *exynos_phy_xlate(struct device *dev,
+ struct of_phandle_args *args)
+{
+ struct phy_driver_priv *priv = dev_get_drvdata(dev);
+ struct phy_private *phy_private;
+ int index = args->args[0];
+
+ /* verify if index and corresponding offset are valid */
+ if (index >= PHY_NR || priv->offsets[index] == INVALID)
+ return ERR_PTR(-ENODEV);
+
+ /* return phy if already allocated */
+ if (!IS_ERR_OR_NULL(priv->phys[index]))
+ return priv->phys[index];
+
+ priv->phys[index] = devm_phy_create(dev, &exynos_phy_ops, NULL);
+ if (IS_ERR(priv->phys[index])) {
+ dev_err(dev, "failed to create PHY %d\n", index);
+ return priv->phys[index];
+ }
+
+ phy_private = devm_kzalloc(dev, sizeof(*phy_private), GFP_KERNEL);
+ if (!phy_private)
+ return ERR_PTR(-ENOMEM);
+
+ phy_private->pmureg = priv->pmureg;
+ phy_private->offset = priv->offsets[index];
+ phy_set_drvdata(priv->phys[index], phy_private);
+
+ return priv->phys[index];
+}
+
+static int exynos_phy_probe(struct platform_device *pdev)
+{
+ const struct of_device_id *of_id = of_match_device(
+ exynos_phy_of_match, &pdev->dev);
+ const struct phy_driver_data *drv_data = of_id->data;
+ struct device *dev = &pdev->dev;
+ struct phy_driver_priv *priv;
+ struct phy_provider *phy_provider;
+ int i;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, priv);
+
+ priv->pmureg = syscon_regmap_lookup_by_phandle(dev->of_node,
+ "samsung,pmu-syscon");
+ if (IS_ERR(priv->pmureg)) {
+ dev_err(dev, "Failed to map PMU register (via syscon)\n");
+ return PTR_ERR(priv->pmureg);
+ }
+
+ /* make all offsets invalid */
+ for (i = 0; i < PHY_NR; i++)
+ priv->offsets[i] = INVALID;
+
+ /* initialize offsets only if available in drv data */
+ for (i = 0; drv_data[i].index != INVALID; i++)
+ priv->offsets[drv_data[i].index] = drv_data[i].offset;
+
+ phy_provider = devm_of_phy_provider_register(dev, exynos_phy_xlate);
+ if (IS_ERR(phy_provider)) {
+ dev_err(dev, "failed to register PHY provider\n");
+ return PTR_ERR(phy_provider);
+ }
+
+ return 0;
+}
+
+static struct platform_driver exynos_phy_driver = {
+ .probe = exynos_phy_probe,
+ .driver = {
+ .of_match_table = exynos_phy_of_match,
+ .name = "exynos-simple-phy",
+ .owner = THIS_MODULE,
+ }
+};
+module_platform_driver(exynos_phy_driver);
+
+MODULE_DESCRIPTION("Exynos Simple PHY driver");
+MODULE_AUTHOR("Tomasz Stanislawski <t.stanislaws@xxxxxxxxxxx>");
+MODULE_LICENSE("GPL v2");
diff --git a/include/dt-bindings/phy/phy-exynos-simple.h b/include/dt-bindings/phy/phy-exynos-simple.h
new file mode 100644
index 0000000..0b7ae14
--- /dev/null
+++ b/include/dt-bindings/phy/phy-exynos-simple.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Author: Tomasz Stanislawski <t.stanislaws@xxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Device Tree binding constants for Exynos Simple PHY driver
+ *
+ */
+
+#ifndef _DT_BINDINGS_PHY_EXYNOS_SIMPLE_PHY_H
+#define _DT_BINDINGS_PHY_EXYNOS_SIMPLE_PHY_H
+
+#define PHY_EXYNOS_SIMPLE_HDMI 0
+#define PHY_EXYNOS_SIMPLE_DAC 1
+#define PHY_EXYNOS_SIMPLE_ADC 2
+#define PHY_EXYNOS_SIMPLE_PCIE 3
+#define PHY_EXYNOS_SIMPLE_SATA 4
+
+#endif
--
1.7.9.5
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