[PATCH 0/2] phylib: mdio-ofgpio ---> mdio-gpio (v3)

[PATCH 0/2] phylib: mdio-ofgpio ---> mdio-gpio (v3)

[Paulius Zaleckas]

I think these patches are ready for merging to netdev-next.
If there is need I can merge these two patches to single.

Changes since v2:
- finished with rework patch

Changes since v1:
- broken to rename patch and mdio-gpio rework

---

Paulius Zaleckas (2):
      phylib: make mdio-gpio work without OF (v4)
      phylib: rename mdio-ofgpio to mdio-gpio


 drivers/net/phy/Kconfig       |    7 +
 drivers/net/phy/Makefile      |    2 
 drivers/net/phy/mdio-gpio.c   |  296 +++++++++++++++++++++++++++++++++++++++++
 drivers/net/phy/mdio-ofgpio.c |  204 ----------------------------
 include/linux/mdio-gpio.h     |   25 +++
 5 files changed, 327 insertions(+), 207 deletions(-)
 create mode 100644 drivers/net/phy/mdio-gpio.c
 delete mode 100644 drivers/net/phy/mdio-ofgpio.c
 create mode 100644 include/linux/mdio-gpio.h

[PATCH 1/2] phylib: rename mdio-ofgpio to mdio-gpio

[Paulius Zaleckas]

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Cc: Laurent Pinchart <laurentp@cse-semaphore.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Mike Frysinger <vapier.adi@gmail.com>
---

 drivers/net/phy/Kconfig       |    2 
 drivers/net/phy/Makefile      |    2 
 drivers/net/phy/mdio-gpio.c   |  204 +++++++++++++++++++++++++++++++++++++++++
 drivers/net/phy/mdio-ofgpio.c |  204 -----------------------------------------
 4 files changed, 206 insertions(+), 206 deletions(-)
 create mode 100644 drivers/net/phy/mdio-gpio.c
 delete mode 100644 drivers/net/phy/mdio-ofgpio.c


diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index d55932a..0318077 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -84,7 +84,7 @@ config MDIO_BITBANG
 
 	  If in doubt, say N.
 
-config MDIO_OF_GPIO
+config MDIO_GPIO
 	tristate "Support for GPIO lib-based bitbanged MDIO buses"
 	depends on MDIO_BITBANG && OF_GPIO
 	---help---
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index eee329f..9ae5d30 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -15,4 +15,4 @@ obj-$(CONFIG_ICPLUS_PHY)	+= icplus.o
 obj-$(CONFIG_REALTEK_PHY)	+= realtek.o
 obj-$(CONFIG_FIXED_PHY)		+= fixed.o
 obj-$(CONFIG_MDIO_BITBANG)	+= mdio-bitbang.o
-obj-$(CONFIG_MDIO_OF_GPIO)	+= mdio-ofgpio.o
+obj-$(CONFIG_MDIO_GPIO)		+= mdio-gpio.o
diff --git a/drivers/net/phy/mdio-gpio.c b/drivers/net/phy/mdio-gpio.c
new file mode 100644
index 0000000..2ff9775
--- /dev/null
+++ b/drivers/net/phy/mdio-gpio.c
@@ -0,0 +1,204 @@
+/*
+ * OpenFirmware GPIO based MDIO bitbang driver.
+ *
+ * Copyright (c) 2008 CSE Semaphore Belgium.
+ *  by Laurent Pinchart <laurentp@cse-semaphore.com>
+ *
+ * Based on earlier work by
+ *
+ * Copyright (c) 2003 Intracom S.A.
+ *  by Pantelis Antoniou <panto@intracom.gr>
+ *
+ * 2005 (c) MontaVista Software, Inc.
+ * Vitaly Bordug <vbordug@ru.mvista.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/mdio-bitbang.h>
+#include <linux/of_gpio.h>
+#include <linux/of_platform.h>
+
+struct mdio_gpio_info {
+	struct mdiobb_ctrl ctrl;
+	int mdc, mdio;
+};
+
+static void mdio_dir(struct mdiobb_ctrl *ctrl, int dir)
+{
+	struct mdio_gpio_info *bitbang =
+		container_of(ctrl, struct mdio_gpio_info, ctrl);
+
+	if (dir)
+		gpio_direction_output(bitbang->mdio, 1);
+	else
+		gpio_direction_input(bitbang->mdio);
+}
+
+static int mdio_read(struct mdiobb_ctrl *ctrl)
+{
+	struct mdio_gpio_info *bitbang =
+		container_of(ctrl, struct mdio_gpio_info, ctrl);
+
+	return gpio_get_value(bitbang->mdio);
+}
+
+static void mdio(struct mdiobb_ctrl *ctrl, int what)
+{
+	struct mdio_gpio_info *bitbang =
+		container_of(ctrl, struct mdio_gpio_info, ctrl);
+
+	gpio_set_value(bitbang->mdio, what);
+}
+
+static void mdc(struct mdiobb_ctrl *ctrl, int what)
+{
+	struct mdio_gpio_info *bitbang =
+		container_of(ctrl, struct mdio_gpio_info, ctrl);
+
+	gpio_set_value(bitbang->mdc, what);
+}
+
+static struct mdiobb_ops mdio_gpio_ops = {
+	.owner = THIS_MODULE,
+	.set_mdc = mdc,
+	.set_mdio_dir = mdio_dir,
+	.set_mdio_data = mdio,
+	.get_mdio_data = mdio_read,
+};
+
+static int __devinit mdio_ofgpio_bitbang_init(struct mii_bus *bus,
+                                         struct device_node *np)
+{
+	struct mdio_gpio_info *bitbang = bus->priv;
+
+	bitbang->mdc = of_get_gpio(np, 0);
+	bitbang->mdio = of_get_gpio(np, 1);
+
+	if (bitbang->mdc < 0 || bitbang->mdio < 0)
+		return -ENODEV;
+
+	snprintf(bus->id, MII_BUS_ID_SIZE, "%x", bitbang->mdc);
+	return 0;
+}
+
+static void __devinit add_phy(struct mii_bus *bus, struct device_node *np)
+{
+	const u32 *data;
+	int len, id, irq;
+
+	data = of_get_property(np, "reg", &len);
+	if (!data || len != 4)
+		return;
+
+	id = *data;
+	bus->phy_mask &= ~(1 << id);
+
+	irq = of_irq_to_resource(np, 0, NULL);
+	if (irq != NO_IRQ)
+		bus->irq[id] = irq;
+}
+
+static int __devinit mdio_ofgpio_probe(struct of_device *ofdev,
+                                        const struct of_device_id *match)
+{
+	struct device_node *np = NULL;
+	struct mii_bus *new_bus;
+	struct mdio_gpio_info *bitbang;
+	int ret = -ENOMEM;
+	int i;
+
+	bitbang = kzalloc(sizeof(struct mdio_gpio_info), GFP_KERNEL);
+	if (!bitbang)
+		goto out;
+
+	bitbang->ctrl.ops = &mdio_gpio_ops;
+
+	new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
+	if (!new_bus)
+		goto out_free_bitbang;
+
+	new_bus->name = "GPIO Bitbanged MII",
+
+	ret = mdio_ofgpio_bitbang_init(new_bus, ofdev->node);
+	if (ret)
+		goto out_free_bus;
+
+	new_bus->phy_mask = ~0;
+	new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
+	if (!new_bus->irq)
+		goto out_free_bus;
+
+	for (i = 0; i < PHY_MAX_ADDR; i++)
+		new_bus->irq[i] = -1;
+
+	while ((np = of_get_next_child(ofdev->node, np)))
+		if (!strcmp(np->type, "ethernet-phy"))
+			add_phy(new_bus, np);
+
+	new_bus->parent = &ofdev->dev;
+	dev_set_drvdata(&ofdev->dev, new_bus);
+
+	ret = mdiobus_register(new_bus);
+	if (ret)
+		goto out_free_irqs;
+
+	return 0;
+
+out_free_irqs:
+	dev_set_drvdata(&ofdev->dev, NULL);
+	kfree(new_bus->irq);
+out_free_bus:
+	free_mdio_bitbang(new_bus);
+out_free_bitbang:
+	kfree(bitbang);
+out:
+	return ret;
+}
+
+static int mdio_ofgpio_remove(struct of_device *ofdev)
+{
+	struct mii_bus *bus = dev_get_drvdata(&ofdev->dev);
+	struct mdio_gpio_info *bitbang = bus->priv;
+
+	mdiobus_unregister(bus);
+	kfree(bus->irq);
+	free_mdio_bitbang(bus);
+	dev_set_drvdata(&ofdev->dev, NULL);
+	kfree(bitbang);
+
+	return 0;
+}
+
+static struct of_device_id mdio_ofgpio_match[] = {
+	{
+		.compatible = "virtual,mdio-gpio",
+	},
+	{},
+};
+
+static struct of_platform_driver mdio_ofgpio_driver = {
+	.name = "mdio-gpio",
+	.match_table = mdio_ofgpio_match,
+	.probe = mdio_ofgpio_probe,
+	.remove = mdio_ofgpio_remove,
+};
+
+static int mdio_ofgpio_init(void)
+{
+	return of_register_platform_driver(&mdio_ofgpio_driver);
+}
+
+static void mdio_ofgpio_exit(void)
+{
+	of_unregister_platform_driver(&mdio_ofgpio_driver);
+}
+
+module_init(mdio_ofgpio_init);
+module_exit(mdio_ofgpio_exit);
diff --git a/drivers/net/phy/mdio-ofgpio.c b/drivers/net/phy/mdio-ofgpio.c
deleted file mode 100644
index 2ff9775..0000000
--- a/drivers/net/phy/mdio-ofgpio.c
+++ /dev/null
@@ -1,204 +0,0 @@
-/*
- * OpenFirmware GPIO based MDIO bitbang driver.
- *
- * Copyright (c) 2008 CSE Semaphore Belgium.
- *  by Laurent Pinchart <laurentp@cse-semaphore.com>
- *
- * Based on earlier work by
- *
- * Copyright (c) 2003 Intracom S.A.
- *  by Pantelis Antoniou <panto@intracom.gr>
- *
- * 2005 (c) MontaVista Software, Inc.
- * Vitaly Bordug <vbordug@ru.mvista.com>
- *
- * This file is licensed under the terms of the GNU General Public License
- * version 2. This program is licensed "as is" without any warranty of any
- * kind, whether express or implied.
- */
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/mdio-bitbang.h>
-#include <linux/of_gpio.h>
-#include <linux/of_platform.h>
-
-struct mdio_gpio_info {
-	struct mdiobb_ctrl ctrl;
-	int mdc, mdio;
-};
-
-static void mdio_dir(struct mdiobb_ctrl *ctrl, int dir)
-{
-	struct mdio_gpio_info *bitbang =
-		container_of(ctrl, struct mdio_gpio_info, ctrl);
-
-	if (dir)
-		gpio_direction_output(bitbang->mdio, 1);
-	else
-		gpio_direction_input(bitbang->mdio);
-}
-
-static int mdio_read(struct mdiobb_ctrl *ctrl)
-{
-	struct mdio_gpio_info *bitbang =
-		container_of(ctrl, struct mdio_gpio_info, ctrl);
-
-	return gpio_get_value(bitbang->mdio);
-}
-
-static void mdio(struct mdiobb_ctrl *ctrl, int what)
-{
-	struct mdio_gpio_info *bitbang =
-		container_of(ctrl, struct mdio_gpio_info, ctrl);
-
-	gpio_set_value(bitbang->mdio, what);
-}
-
-static void mdc(struct mdiobb_ctrl *ctrl, int what)
-{
-	struct mdio_gpio_info *bitbang =
-		container_of(ctrl, struct mdio_gpio_info, ctrl);
-
-	gpio_set_value(bitbang->mdc, what);
-}
-
-static struct mdiobb_ops mdio_gpio_ops = {
-	.owner = THIS_MODULE,
-	.set_mdc = mdc,
-	.set_mdio_dir = mdio_dir,
-	.set_mdio_data = mdio,
-	.get_mdio_data = mdio_read,
-};
-
-static int __devinit mdio_ofgpio_bitbang_init(struct mii_bus *bus,
-                                         struct device_node *np)
-{
-	struct mdio_gpio_info *bitbang = bus->priv;
-
-	bitbang->mdc = of_get_gpio(np, 0);
-	bitbang->mdio = of_get_gpio(np, 1);
-
-	if (bitbang->mdc < 0 || bitbang->mdio < 0)
-		return -ENODEV;
-
-	snprintf(bus->id, MII_BUS_ID_SIZE, "%x", bitbang->mdc);
-	return 0;
-}
-
-static void __devinit add_phy(struct mii_bus *bus, struct device_node *np)
-{
-	const u32 *data;
-	int len, id, irq;
-
-	data = of_get_property(np, "reg", &len);
-	if (!data || len != 4)
-		return;
-
-	id = *data;
-	bus->phy_mask &= ~(1 << id);
-
-	irq = of_irq_to_resource(np, 0, NULL);
-	if (irq != NO_IRQ)
-		bus->irq[id] = irq;
-}
-
-static int __devinit mdio_ofgpio_probe(struct of_device *ofdev,
-                                        const struct of_device_id *match)
-{
-	struct device_node *np = NULL;
-	struct mii_bus *new_bus;
-	struct mdio_gpio_info *bitbang;
-	int ret = -ENOMEM;
-	int i;
-
-	bitbang = kzalloc(sizeof(struct mdio_gpio_info), GFP_KERNEL);
-	if (!bitbang)
-		goto out;
-
-	bitbang->ctrl.ops = &mdio_gpio_ops;
-
-	new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
-	if (!new_bus)
-		goto out_free_bitbang;
-
-	new_bus->name = "GPIO Bitbanged MII",
-
-	ret = mdio_ofgpio_bitbang_init(new_bus, ofdev->node);
-	if (ret)
-		goto out_free_bus;
-
-	new_bus->phy_mask = ~0;
-	new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
-	if (!new_bus->irq)
-		goto out_free_bus;
-
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		new_bus->irq[i] = -1;
-
-	while ((np = of_get_next_child(ofdev->node, np)))
-		if (!strcmp(np->type, "ethernet-phy"))
-			add_phy(new_bus, np);
-
-	new_bus->parent = &ofdev->dev;
-	dev_set_drvdata(&ofdev->dev, new_bus);
-
-	ret = mdiobus_register(new_bus);
-	if (ret)
-		goto out_free_irqs;
-
-	return 0;
-
-out_free_irqs:
-	dev_set_drvdata(&ofdev->dev, NULL);
-	kfree(new_bus->irq);
-out_free_bus:
-	free_mdio_bitbang(new_bus);
-out_free_bitbang:
-	kfree(bitbang);
-out:
-	return ret;
-}
-
-static int mdio_ofgpio_remove(struct of_device *ofdev)
-{
-	struct mii_bus *bus = dev_get_drvdata(&ofdev->dev);
-	struct mdio_gpio_info *bitbang = bus->priv;
-
-	mdiobus_unregister(bus);
-	kfree(bus->irq);
-	free_mdio_bitbang(bus);
-	dev_set_drvdata(&ofdev->dev, NULL);
-	kfree(bitbang);
-
-	return 0;
-}
-
-static struct of_device_id mdio_ofgpio_match[] = {
-	{
-		.compatible = "virtual,mdio-gpio",
-	},
-	{},
-};
-
-static struct of_platform_driver mdio_ofgpio_driver = {
-	.name = "mdio-gpio",
-	.match_table = mdio_ofgpio_match,
-	.probe = mdio_ofgpio_probe,
-	.remove = mdio_ofgpio_remove,
-};
-
-static int mdio_ofgpio_init(void)
-{
-	return of_register_platform_driver(&mdio_ofgpio_driver);
-}
-
-static void mdio_ofgpio_exit(void)
-{
-	of_unregister_platform_driver(&mdio_ofgpio_driver);
-}
-
-module_init(mdio_ofgpio_init);
-module_exit(mdio_ofgpio_exit);

[PATCH 2/2] phylib: make mdio-gpio work without OF (v4)

[Paulius Zaleckas]

make mdio-gpio work with non OpenFirmware gpio implementation.

Aditional changes to mdio-gpio:
- use gpio_request() and gpio_free()
- place irq[] array in struct mdio_gpio_info
- add module description, author and license
- add note about compiling this driver as module
- rename mdc and mdio function (were ugly names)
- change MII to MDIO in bus name
- add __init __exit to module (un)loading functions
- probe fails if no phys added to the bus
- kzalloc bitbang with sizeof(*bitbang)

Changes since v3:
- keep bus naming "%x" to be compatible with existing drivers.

Changes since v2:
- more #ifdefs reduction
- platform driver will be registered on OF platforms also
- unified platform and OF bus_id to phy%i

Changes since v1:
- removed NO_IRQ
- reduced #idefs

Laurent, please test this driver under OF.

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Cc: Laurent Pinchart <laurent.pinchart@skynet.be>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Mike Frysinger <vapier.adi@gmail.com>
---

 drivers/net/phy/Kconfig     |    5 +
 drivers/net/phy/mdio-gpio.c |  232 ++++++++++++++++++++++++++++++-------------
 include/linux/mdio-gpio.h   |   25 +++++
 3 files changed, 191 insertions(+), 71 deletions(-)
 create mode 100644 include/linux/mdio-gpio.h


diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 0318077..c4c5a2f 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -86,8 +86,11 @@ config MDIO_BITBANG
 
 config MDIO_GPIO
 	tristate "Support for GPIO lib-based bitbanged MDIO buses"
-	depends on MDIO_BITBANG && OF_GPIO
+	depends on MDIO_BITBANG && GENERIC_GPIO
 	---help---
 	  Supports GPIO lib-based MDIO busses.
 
+	  To compile this driver as a module, choose M here: the module
+	  will be called mdio-gpio.
+
 endif # PHYLIB
diff --git a/drivers/net/phy/mdio-gpio.c b/drivers/net/phy/mdio-gpio.c
index 2ff9775..a439ebe 100644
--- a/drivers/net/phy/mdio-gpio.c
+++ b/drivers/net/phy/mdio-gpio.c
@@ -1,9 +1,12 @@
 /*
- * OpenFirmware GPIO based MDIO bitbang driver.
+ * GPIO based MDIO bitbang driver.
+ * Supports OpenFirmware.
  *
  * Copyright (c) 2008 CSE Semaphore Belgium.
  *  by Laurent Pinchart <laurentp@cse-semaphore.com>
  *
+ * Copyright (C) 2008, Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
+ *
  * Based on earlier work by
  *
  * Copyright (c) 2003 Intracom S.A.
@@ -21,9 +24,14 @@
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
-#include <linux/mdio-bitbang.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/mdio-gpio.h>
+
+#ifdef CONFIG_OF_GPIO
 #include <linux/of_gpio.h>
 #include <linux/of_platform.h>
+#endif
 
 struct mdio_gpio_info {
 	struct mdiobb_ctrl ctrl;
@@ -41,7 +49,7 @@ static void mdio_dir(struct mdiobb_ctrl *ctrl, int dir)
 		gpio_direction_input(bitbang->mdio);
 }
 
-static int mdio_read(struct mdiobb_ctrl *ctrl)
+static int mdio_get(struct mdiobb_ctrl *ctrl)
 {
 	struct mdio_gpio_info *bitbang =
 		container_of(ctrl, struct mdio_gpio_info, ctrl);
@@ -49,7 +57,7 @@ static int mdio_read(struct mdiobb_ctrl *ctrl)
 	return gpio_get_value(bitbang->mdio);
 }
 
-static void mdio(struct mdiobb_ctrl *ctrl, int what)
+static void mdio_set(struct mdiobb_ctrl *ctrl, int what)
 {
 	struct mdio_gpio_info *bitbang =
 		container_of(ctrl, struct mdio_gpio_info, ctrl);
@@ -57,7 +65,7 @@ static void mdio(struct mdiobb_ctrl *ctrl, int what)
 	gpio_set_value(bitbang->mdio, what);
 }
 
-static void mdc(struct mdiobb_ctrl *ctrl, int what)
+static void mdc_set(struct mdiobb_ctrl *ctrl, int what)
 {
 	struct mdio_gpio_info *bitbang =
 		container_of(ctrl, struct mdio_gpio_info, ctrl);
@@ -67,93 +75,69 @@ static void mdc(struct mdiobb_ctrl *ctrl, int what)
 
 static struct mdiobb_ops mdio_gpio_ops = {
 	.owner = THIS_MODULE,
-	.set_mdc = mdc,
+	.set_mdc = mdc_set,
 	.set_mdio_dir = mdio_dir,
-	.set_mdio_data = mdio,
-	.get_mdio_data = mdio_read,
+	.set_mdio_data = mdio_set,
+	.get_mdio_data = mdio_get,
 };
 
-static int __devinit mdio_ofgpio_bitbang_init(struct mii_bus *bus,
-                                         struct device_node *np)
-{
-	struct mdio_gpio_info *bitbang = bus->priv;
-
-	bitbang->mdc = of_get_gpio(np, 0);
-	bitbang->mdio = of_get_gpio(np, 1);
-
-	if (bitbang->mdc < 0 || bitbang->mdio < 0)
-		return -ENODEV;
-
-	snprintf(bus->id, MII_BUS_ID_SIZE, "%x", bitbang->mdc);
-	return 0;
-}
-
-static void __devinit add_phy(struct mii_bus *bus, struct device_node *np)
+static int __devinit mdio_gpio_bus_init(struct device *dev,
+					struct mdio_gpio_platform_data *pdata,
+					int bus_id)
 {
-	const u32 *data;
-	int len, id, irq;
-
-	data = of_get_property(np, "reg", &len);
-	if (!data || len != 4)
-		return;
-
-	id = *data;
-	bus->phy_mask &= ~(1 << id);
-
-	irq = of_irq_to_resource(np, 0, NULL);
-	if (irq != NO_IRQ)
-		bus->irq[id] = irq;
-}
-
-static int __devinit mdio_ofgpio_probe(struct of_device *ofdev,
-                                        const struct of_device_id *match)
-{
-	struct device_node *np = NULL;
 	struct mii_bus *new_bus;
 	struct mdio_gpio_info *bitbang;
 	int ret = -ENOMEM;
 	int i;
 
-	bitbang = kzalloc(sizeof(struct mdio_gpio_info), GFP_KERNEL);
+	bitbang = kzalloc(sizeof(*bitbang), GFP_KERNEL);
 	if (!bitbang)
 		goto out;
 
 	bitbang->ctrl.ops = &mdio_gpio_ops;
+	bitbang->mdc = pdata->mdc;
+	bitbang->mdio = pdata->mdio;
 
 	new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
 	if (!new_bus)
 		goto out_free_bitbang;
 
-	new_bus->name = "GPIO Bitbanged MII",
+	new_bus->name = "GPIO Bitbanged MDIO",
 
-	ret = mdio_ofgpio_bitbang_init(new_bus, ofdev->node);
-	if (ret)
-		goto out_free_bus;
+	ret = -ENODEV;
 
-	new_bus->phy_mask = ~0;
-	new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
-	if (!new_bus->irq)
+	new_bus->phy_mask = pdata->phy_mask;
+	new_bus->irq = pdata->irqs;
+	new_bus->parent = dev;
+
+	if (new_bus->phy_mask == ~0)
 		goto out_free_bus;
 
 	for (i = 0; i < PHY_MAX_ADDR; i++)
-		new_bus->irq[i] = -1;
+		if (!new_bus->irq[i])
+			new_bus->irq[i] = PHY_POLL;
 
-	while ((np = of_get_next_child(ofdev->node, np)))
-		if (!strcmp(np->type, "ethernet-phy"))
-			add_phy(new_bus, np);
+	snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", bus_id);
+
+	if (gpio_request(bitbang->mdc, "mdc"))
+		goto out_free_bus;
 
-	new_bus->parent = &ofdev->dev;
-	dev_set_drvdata(&ofdev->dev, new_bus);
+	if (gpio_request(bitbang->mdio, "mdio"))
+		goto out_free_mdc;
+
+	dev_set_drvdata(dev, new_bus);
 
 	ret = mdiobus_register(new_bus);
 	if (ret)
-		goto out_free_irqs;
+		goto out_free_all;
 
 	return 0;
 
-out_free_irqs:
-	dev_set_drvdata(&ofdev->dev, NULL);
-	kfree(new_bus->irq);
+out_free_all:
+	dev_set_drvdata(dev, NULL);
+	gpio_free(bitbang->mdio);
+out_free_mdc:
+	gpio_free(bitbang->mdc);
 out_free_bus:
 	free_mdio_bitbang(new_bus);
 out_free_bitbang:
@@ -162,16 +146,86 @@ out:
 	return ret;
 }
 
-static int mdio_ofgpio_remove(struct of_device *ofdev)
+static void __devexit mdio_gpio_bus_destroy(struct device *dev)
 {
-	struct mii_bus *bus = dev_get_drvdata(&ofdev->dev);
+	struct mii_bus *bus = dev_get_drvdata(dev);
 	struct mdio_gpio_info *bitbang = bus->priv;
 
 	mdiobus_unregister(bus);
-	kfree(bus->irq);
 	free_mdio_bitbang(bus);
-	dev_set_drvdata(&ofdev->dev, NULL);
+	dev_set_drvdata(dev, NULL);
+	gpio_free(bitbang->mdc);
+	gpio_free(bitbang->mdio);
 	kfree(bitbang);
+}
+
+static int __devinit mdio_gpio_probe(struct platform_device *pdev)
+{
+	struct mdio_gpio_platform_data *pdata = pdev->dev.platform_data;
+
+	if (!pdata)
+		return -ENODEV;
+
+	return mdio_gpio_bus_init(&pdev->dev, pdata, pdev->id);
+}
+
+static int __devexit mdio_gpio_remove(struct platform_device *pdev)
+{
+	mdio_gpio_bus_destroy(&pdev->dev);
+
+	return 0;
+}
+
+#ifdef CONFIG_OF_GPIO
+static void __devinit add_phy(struct mdio_gpio_platform_data *pdata,
+			      struct device_node *np)
+{
+	const u32 *data;
+	int len, id, irq;
+
+	data = of_get_property(np, "reg", &len);
+	if (!data || len != 4)
+		return;
+
+	id = *data;
+	pdata->phy_mask &= ~(1 << id);
+
+	irq = of_irq_to_resource(np, 0, NULL);
+	if (irq)
+		pdata->irqs[id] = irq;
+}
+
+static int __devinit mdio_ofgpio_probe(struct of_device *ofdev,
+                                        const struct of_device_id *match)
+{
+	struct device_node *np = NULL;
+	struct mdio_gpio_platform_data *pdata;
+
+	pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return -ENOMEM;
+
+	pdata->mdc = of_get_gpio(ofdev->node, 0);
+	pdata->mdio = of_get_gpio(ofdev->node, 1);
+
+	if (pdata->mdc < 0 || pdata->mdio < 0)
+		goto out_free;
+
+	while ((np = of_get_next_child(ofdev->node, np)))
+		if (!strcmp(np->type, "ethernet-phy"))
+			add_phy(pdata, np);
+
+	return mdio_gpio_bus_init(&ofdev->dev, pdata, pdata->mdc);
+
+out_free:
+	kfree(pdata);
+	return -ENODEV;
+}
+
+static int __devexit mdio_ofgpio_remove(struct of_device *ofdev)
+{
+	mdio_gpio_bus_destroy(&ofdev->dev);
+	kfree(ofdev->dev.platform_data);
 
 	return 0;
 }
@@ -187,18 +241,56 @@ static struct of_platform_driver mdio_ofgpio_driver = {
 	.name = "mdio-gpio",
 	.match_table = mdio_ofgpio_match,
 	.probe = mdio_ofgpio_probe,
-	.remove = mdio_ofgpio_remove,
+	.remove = __devexit_p(mdio_ofgpio_remove),
 };
 
-static int mdio_ofgpio_init(void)
+static inline int __init mdio_ofgpio_init(void)
 {
 	return of_register_platform_driver(&mdio_ofgpio_driver);
 }
 
-static void mdio_ofgpio_exit(void)
+static inline void __exit mdio_ofgpio_exit(void)
 {
 	of_unregister_platform_driver(&mdio_ofgpio_driver);
 }
+#else
+static inline int __init mdio_ofgpio_init(void) { return 0; }
+static inline void __exit mdio_ofgpio_exit(void) { }
+#endif /* CONFIG_OF_GPIO */
+
+static struct platform_driver mdio_gpio_driver = {
+	.probe = mdio_gpio_probe,
+	.remove = __devexit_p(mdio_gpio_remove),
+	.driver		= {
+		.name	= "mdio-gpio",
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init mdio_gpio_init(void)
+{
+	int ret;
+
+	ret = mdio_ofgpio_init();
+	if (ret)
+		return ret;
+
+	ret = platform_driver_register(&mdio_gpio_driver);
+	if (ret)
+		mdio_ofgpio_exit();
+
+	return ret;
+}
+module_init(mdio_gpio_init);
+
+static void __exit mdio_gpio_exit(void)
+{
+	platform_driver_unregister(&mdio_gpio_driver);
+	mdio_ofgpio_exit();
+}
+module_exit(mdio_gpio_exit);
 
-module_init(mdio_ofgpio_init);
-module_exit(mdio_ofgpio_exit);
+MODULE_ALIAS("platform:mdio-gpio");
+MODULE_AUTHOR("Laurent Pinchart, Paulius Zaleckas");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Generic driver for MDIO bus emulation using GPIO");
diff --git a/include/linux/mdio-gpio.h b/include/linux/mdio-gpio.h
new file mode 100644
index 0000000..e9d3fdf
--- /dev/null
+++ b/include/linux/mdio-gpio.h
@@ -0,0 +1,25 @@
+/*
+ * MDIO-GPIO bus platform data structures
+ *
+ * Copyright (C) 2008, Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#ifndef __LINUX_MDIO_GPIO_H
+#define __LINUX_MDIO_GPIO_H
+
+#include <linux/mdio-bitbang.h>
+
+struct mdio_gpio_platform_data {
+	/* GPIO numbers for bus pins */
+	unsigned int mdc;
+	unsigned int mdio;
+
+	unsigned int phy_mask;
+	int irqs[PHY_MAX_ADDR];
+};
+
+#endif /* __LINUX_MDIO_GPIO_H */

Re: [PATCH 2/2] phylib: make mdio-gpio work without OF (v4)

[Laurent Pinchart]

On Friday 14 November 2008 11:24:34 Paulius Zaleckas wrote:
> make mdio-gpio work with non OpenFirmware gpio implementation.
>
> Aditional changes to mdio-gpio:
> - use gpio_request() and gpio_free()
> - place irq[] array in struct mdio_gpio_info
> - add module description, author and license
> - add note about compiling this driver as module
> - rename mdc and mdio function (were ugly names)
> - change MII to MDIO in bus name
> - add __init __exit to module (un)loading functions
> - probe fails if no phys added to the bus
> - kzalloc bitbang with sizeof(*bitbang)
>
> Changes since v3:
> - keep bus naming "%x" to be compatible with existing drivers.
>
> Changes since v2:
> - more #ifdefs reduction
> - platform driver will be registered on OF platforms also
> - unified platform and OF bus_id to phy%i
>
> Changes since v1:
> - removed NO_IRQ
> - reduced #idefs
>
> Laurent, please test this driver under OF.

No obvious issue found.

Acked-by: Laurent Pinchart <laurent.pinchart@skynet.be>

> Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
> Cc: Laurent Pinchart <laurent.pinchart@skynet.be>
> Cc: Grant Likely <grant.likely@secretlab.ca>
> Cc: Mike Frysinger <vapier.adi@gmail.com>

-- 
Laurent Pinchart
CSE Semaphore Belgium

Chaussee de Bruxelles, 732A
B-1410 Waterloo
Belgium

T +32 (2) 387 42 59
F +32 (2) 387 42 75