[PATCH v3 0/3] phy: Add USB HSIC PHY driver for Marvell MMP3 SoC

[PATCH v3 0/3] phy: Add USB HSIC PHY driver for Marvell MMP3 SoC

[Lubomir Rintel]

Hi,

please consider applying this patch set. It adds the HSIC PHY driver for
Marvell MMP3 along with related DT binding changes.

Compared to v2, the Reviewed-by/Acked-by tags for DT patches have been
collected.

Thank you,
Lubo

[PATCH v3 1/3] dt-bindings: phy: Drop reset-gpios from marvell,mmp3-hsic-phy

[Lubomir Rintel]

This has been added in error -- the PHY block doesn't have a reset pin.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Reviewed-by: Rob Herring <robh@kernel.org>

---
Changes since v2:
- Add Rob's Reviewed-by tag

 .../devicetree/bindings/phy/marvell,mmp3-hsic-phy.yaml     | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/Documentation/devicetree/bindings/phy/marvell,mmp3-hsic-phy.yaml b/Documentation/devicetree/bindings/phy/marvell,mmp3-hsic-phy.yaml
index 00609ace677c9..30e290c579308 100644
--- a/Documentation/devicetree/bindings/phy/marvell,mmp3-hsic-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/marvell,mmp3-hsic-phy.yaml
@@ -18,27 +18,20 @@ properties:
     maxItems: 1
     description: base address of the device
 
-  reset-gpios:
-    maxItems: 1
-    description: GPIO connected to reset
-
   "#phy-cells":
     const: 0
 
 required:
   - compatible
   - reg
-  - reset-gpios
   - "#phy-cells"
 
 additionalProperties: false
 
 examples:
   - |
-    #include <dt-bindings/gpio/gpio.h>
     hsic-phy@f0001800 {
             compatible = "marvell,mmp3-hsic-phy";
             reg = <0xf0001800 0x40>;
-            reset-gpios = <&gpio 63 GPIO_ACTIVE_HIGH>;
             #phy-cells = <0>;
     };
-- 
2.26.2

[PATCH v3 2/3] dt-bindings: phy: Allow BSD licensing of marvell,mmp3-hsic-phy.yaml

[Lubomir Rintel]

I wrote this binding and I'm fine with it being GPL + BSD dual-licensed,
as is recommended for new DT bindings.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Rob Herring <robh@kernel.org>

---
Changes since v2:
- Add Rob's ack

 .../devicetree/bindings/phy/marvell,mmp3-hsic-phy.yaml          | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/phy/marvell,mmp3-hsic-phy.yaml b/Documentation/devicetree/bindings/phy/marvell,mmp3-hsic-phy.yaml
index 30e290c579308..ff255aa4cc103 100644
--- a/Documentation/devicetree/bindings/phy/marvell,mmp3-hsic-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/marvell,mmp3-hsic-phy.yaml
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: GPL-2.0-or-later
+# SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
 # Copyright 2019 Lubomir Rintel <lkundrak@v3.sk>
 %YAML 1.2
 ---
-- 
2.26.2

[PATCH v3 3/3] phy: Add USB HSIC PHY driver for Marvell MMP3 SoC

[Lubomir Rintel]

Add PHY driver for the HSICs found on Marvell MMP3 SoC. The driver is
rather straightforward -- the PHY essentially just needs to be enabled.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>

---
Changes since v1:
- Explicitely cast drvdata pointer to make sparse happy

 drivers/phy/marvell/Kconfig         | 12 +++++
 drivers/phy/marvell/Makefile        |  1 +
 drivers/phy/marvell/phy-mmp3-hsic.c | 82 +++++++++++++++++++++++++++++
 3 files changed, 95 insertions(+)
 create mode 100644 drivers/phy/marvell/phy-mmp3-hsic.c

diff --git a/drivers/phy/marvell/Kconfig b/drivers/phy/marvell/Kconfig
index 8f6273c837ec3..6c96f2bf52665 100644
--- a/drivers/phy/marvell/Kconfig
+++ b/drivers/phy/marvell/Kconfig
@@ -116,3 +116,15 @@ config PHY_MMP3_USB
 	  The PHY driver will be used by Marvell udc/ehci/otg driver.
 
 	  To compile this driver as a module, choose M here.
+
+config PHY_MMP3_HSIC
+	tristate "Marvell MMP3 USB HSIC PHY Driver"
+	depends on MACH_MMP3_DT || COMPILE_TEST
+	select GENERIC_PHY
+	help
+	  Enable this to support Marvell MMP3 USB HSIC PHY driver for
+	  Marvell MMP3 SoC. This driver will be used my the Marvell EHCI
+	  driver to initialize the interface to internal USB HSIC
+	  components on MMP3-based boards.
+
+	  To compile this driver as a module, choose M here.
diff --git a/drivers/phy/marvell/Makefile b/drivers/phy/marvell/Makefile
index 5a106b1549f41..7f296ef028292 100644
--- a/drivers/phy/marvell/Makefile
+++ b/drivers/phy/marvell/Makefile
@@ -3,6 +3,7 @@ obj-$(CONFIG_ARMADA375_USBCLUSTER_PHY)	+= phy-armada375-usb2.o
 obj-$(CONFIG_PHY_BERLIN_SATA)		+= phy-berlin-sata.o
 obj-$(CONFIG_PHY_BERLIN_USB)		+= phy-berlin-usb.o
 obj-$(CONFIG_PHY_MMP3_USB)		+= phy-mmp3-usb.o
+obj-$(CONFIG_PHY_MMP3_HSIC)		+= phy-mmp3-hsic.o
 obj-$(CONFIG_PHY_MVEBU_A3700_COMPHY)	+= phy-mvebu-a3700-comphy.o
 obj-$(CONFIG_PHY_MVEBU_A3700_UTMI)	+= phy-mvebu-a3700-utmi.o
 obj-$(CONFIG_PHY_MVEBU_A38X_COMPHY)	+= phy-armada38x-comphy.o
diff --git a/drivers/phy/marvell/phy-mmp3-hsic.c b/drivers/phy/marvell/phy-mmp3-hsic.c
new file mode 100644
index 0000000000000..47c1e8894939f
--- /dev/null
+++ b/drivers/phy/marvell/phy-mmp3-hsic.c
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020 Lubomir Rintel <lkundrak@v3.sk>
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+
+#define HSIC_CTRL	0x08
+#define HSIC_ENABLE	BIT(7)
+#define PLL_BYPASS	BIT(4)
+
+static int mmp3_hsic_phy_init(struct phy *phy)
+{
+	void __iomem *base = (void __iomem *)phy_get_drvdata(phy);
+	u32 hsic_ctrl;
+
+	hsic_ctrl = readl_relaxed(base + HSIC_CTRL);
+	hsic_ctrl |= HSIC_ENABLE;
+	hsic_ctrl |= PLL_BYPASS;
+	writel_relaxed(hsic_ctrl, base + HSIC_CTRL);
+
+	return 0;
+}
+
+static const struct phy_ops mmp3_hsic_phy_ops = {
+	.init		= mmp3_hsic_phy_init,
+	.owner		= THIS_MODULE,
+};
+
+static const struct of_device_id mmp3_hsic_phy_of_match[] = {
+	{ .compatible = "marvell,mmp3-hsic-phy", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, mmp3_hsic_phy_of_match);
+
+static int mmp3_hsic_phy_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct phy_provider *provider;
+	struct resource *resource;
+	void __iomem *base;
+	struct phy *phy;
+
+	resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	base = devm_ioremap_resource(dev, resource);
+	if (IS_ERR(base)) {
+		dev_err(dev, "failed to remap PHY regs\n");
+		return PTR_ERR(base);
+	}
+
+	phy = devm_phy_create(dev, NULL, &mmp3_hsic_phy_ops);
+	if (IS_ERR(phy)) {
+		dev_err(dev, "failed to create PHY\n");
+		return PTR_ERR(phy);
+	}
+
+	phy_set_drvdata(phy, (void *)base);
+	provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+	if (IS_ERR(provider)) {
+		dev_err(dev, "failed to register PHY provider\n");
+		return PTR_ERR(provider);
+	}
+
+	return 0;
+}
+
+static struct platform_driver mmp3_hsic_phy_driver = {
+	.probe		= mmp3_hsic_phy_probe,
+	.driver		= {
+		.name	= "mmp3-hsic-phy",
+		.of_match_table = mmp3_hsic_phy_of_match,
+	},
+};
+module_platform_driver(mmp3_hsic_phy_driver);
+
+MODULE_AUTHOR("Lubomir Rintel <lkundrak@v3.sk>");
+MODULE_DESCRIPTION("Marvell MMP3 USB HSIC PHY Driver");
+MODULE_LICENSE("GPL");
-- 
2.26.2