[PATCH v2 0/3] Add device tree probe support for imx fec driver

[PATCH v2 0/3] Add device tree probe support for imx fec driver

[Shawn Guo]

The first two patches are a little off topic.  Patch #1 adds a helper
function of_get_phy_mode into of_net, and #2 converts ibm_newemac net
driver to use this helper function.  Patch #3 is the actual one adding
tree probe support for imx fec driver, with of_get_phy_mode being used.

Changes since v1:
 * Address review comments given by Grant
 * Add patch #1 and #2

Shawn Guo (3):
      dt/net: add helper function of_get_phy_mode
      net: ibm_newemac: convert it to use of_get_phy_mode
      net/fec: add device tree probe support

 Documentation/devicetree/bindings/net/fsl-fec.txt |   24 +++++
 drivers/net/fec.c                                 |   99 +++++++++++++++++++-
 drivers/net/ibm_newemac/core.c                    |   33 +------
 drivers/net/ibm_newemac/emac.h                    |   19 ++--
 drivers/net/ibm_newemac/phy.c                     |    7 +-
 drivers/of/of_net.c                               |   45 +++++++++
 include/linux/of_net.h                            |    1 +
 include/linux/phy.h                               |    4 +-
 8 files changed, 186 insertions(+), 46 deletions(-)

[PATCH v2 1/3] dt/net: add helper function of_get_phy_mode

[Shawn Guo]

It adds the helper function of_get_phy_mode getting phy interface
from device tree.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
---
 drivers/of/of_net.c    |   43 +++++++++++++++++++++++++++++++++++++++++++
 include/linux/of_net.h |    1 +
 2 files changed, 44 insertions(+), 0 deletions(-)

diff --git a/drivers/of/of_net.c b/drivers/of/of_net.c
index 86f334a..cc117db 100644
--- a/drivers/of/of_net.c
+++ b/drivers/of/of_net.c
@@ -8,6 +8,49 @@
 #include <linux/etherdevice.h>
 #include <linux/kernel.h>
 #include <linux/of_net.h>
+#include <linux/phy.h>
+
+/**
+ * It maps 'enum phy_interface_t' found in include/linux/phy.h
+ * into the device tree binding of 'phy-mode', so that Ethernet
+ * device driver can get phy interface from device tree.
+ */
+static const char *phy_modes[] = {
+	[PHY_INTERFACE_MODE_MII]	= "mii",
+	[PHY_INTERFACE_MODE_GMII]	= "gmii",
+	[PHY_INTERFACE_MODE_SGMII]	= "sgmii",
+	[PHY_INTERFACE_MODE_TBI]	= "tbi",
+	[PHY_INTERFACE_MODE_RMII]	= "rmii",
+	[PHY_INTERFACE_MODE_RGMII]	= "rgmii",
+	[PHY_INTERFACE_MODE_RGMII_ID]	= "rgmii-id",
+	[PHY_INTERFACE_MODE_RGMII_RXID]	= "rgmii-rxid",
+	[PHY_INTERFACE_MODE_RGMII_TXID] = "rgmii-txid",
+	[PHY_INTERFACE_MODE_RTBI]	= "rtbi",
+};
+
+/**
+ * of_get_phy_mode - Get phy mode for given device_node
+ * @np:	Pointer to the given device_node
+ *
+ * The function gets phy interface string from property 'phy-mode',
+ * and return its index in phy_modes table, or errno in error case.
+ */
+const int of_get_phy_mode(struct device_node *np)
+{
+	const char *pm;
+	int err, i;
+
+	err = of_property_read_string(np, "phy-mode", &pm);
+	if (err < 0)
+		return err;
+
+	for (i = 0; i < ARRAY_SIZE(phy_modes); i++)
+		if (!strcasecmp(pm, phy_modes[i]))
+			return i;
+
+	return -ENODEV;
+}
+EXPORT_SYMBOL_GPL(of_get_phy_mode);
 
 /**
  * Search the device tree for the best MAC address to use.  'mac-address' is
diff --git a/include/linux/of_net.h b/include/linux/of_net.h
index e913081..f474641 100644
--- a/include/linux/of_net.h
+++ b/include/linux/of_net.h
@@ -9,6 +9,7 @@
 
 #ifdef CONFIG_OF_NET
 #include <linux/of.h>
+extern const int of_get_phy_mode(struct device_node *np);
 extern const void *of_get_mac_address(struct device_node *np);
 #endif
 
-- 
1.7.4.1

[PATCH v2 2/3] net: ibm_newemac: convert it to use of_get_phy_mode

[Shawn Guo]

The patch extends 'enum phy_interface_t' and of_get_phy_mode a little
bit with PHY_INTERFACE_MODE_NA and PHY_INTERFACE_MODE_SMII added,
and then converts ibm_newemac net driver to use of_get_phy_mode
getting phy mode from device tree.

It also resolves the namespace conflict on phy_read/write between
common mdiobus interface and ibm_newemac private one.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Grant Likely <grant.likely@secretlab.ca>
---
 drivers/net/ibm_newemac/core.c |   33 ++++-----------------------------
 drivers/net/ibm_newemac/emac.h |   19 ++++++++++---------
 drivers/net/ibm_newemac/phy.c  |    7 +++++--
 drivers/of/of_net.c            |    2 ++
 include/linux/phy.h            |    4 +++-
 5 files changed, 24 insertions(+), 41 deletions(-)

diff --git a/drivers/net/ibm_newemac/core.c b/drivers/net/ibm_newemac/core.c
index 725399e..70cb7d8 100644
--- a/drivers/net/ibm_newemac/core.c
+++ b/drivers/net/ibm_newemac/core.c
@@ -39,6 +39,7 @@
 #include <linux/bitops.h>
 #include <linux/workqueue.h>
 #include <linux/of.h>
+#include <linux/of_net.h>
 #include <linux/slab.h>
 
 #include <asm/processor.h>
@@ -2506,18 +2507,6 @@ static int __devinit emac_init_config(struct emac_instance *dev)
 {
 	struct device_node *np = dev->ofdev->dev.of_node;
 	const void *p;
-	unsigned int plen;
-	const char *pm, *phy_modes[] = {
-		[PHY_MODE_NA] = "",
-		[PHY_MODE_MII] = "mii",
-		[PHY_MODE_RMII] = "rmii",
-		[PHY_MODE_SMII] = "smii",
-		[PHY_MODE_RGMII] = "rgmii",
-		[PHY_MODE_TBI] = "tbi",
-		[PHY_MODE_GMII] = "gmii",
-		[PHY_MODE_RTBI] = "rtbi",
-		[PHY_MODE_SGMII] = "sgmii",
-	};
 
 	/* Read config from device-tree */
 	if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1))
@@ -2566,23 +2555,9 @@ static int __devinit emac_init_config(struct emac_instance *dev)
 		dev->mal_burst_size = 256;
 
 	/* PHY mode needs some decoding */
-	dev->phy_mode = PHY_MODE_NA;
-	pm = of_get_property(np, "phy-mode", &plen);
-	if (pm != NULL) {
-		int i;
-		for (i = 0; i < ARRAY_SIZE(phy_modes); i++)
-			if (!strcasecmp(pm, phy_modes[i])) {
-				dev->phy_mode = i;
-				break;
-			}
-	}
-
-	/* Backward compat with non-final DT */
-	if (dev->phy_mode == PHY_MODE_NA && pm != NULL && plen == 4) {
-		u32 nmode = *(const u32 *)pm;
-		if (nmode > PHY_MODE_NA && nmode <= PHY_MODE_SGMII)
-			dev->phy_mode = nmode;
-	}
+	dev->phy_mode = of_get_phy_mode(np);
+	if (dev->phy_mode < 0)
+		dev->phy_mode = PHY_MODE_NA;
 
 	/* Check EMAC version */
 	if (of_device_is_compatible(np, "ibm,emac4sync")) {
diff --git a/drivers/net/ibm_newemac/emac.h b/drivers/net/ibm_newemac/emac.h
index 8a61b597..1568278 100644
--- a/drivers/net/ibm_newemac/emac.h
+++ b/drivers/net/ibm_newemac/emac.h
@@ -26,6 +26,7 @@
 #define __IBM_NEWEMAC_H
 
 #include <linux/types.h>
+#include <linux/phy.h>
 
 /* EMAC registers 			Write Access rules */
 struct emac_regs {
@@ -106,15 +107,15 @@ struct emac_regs {
 /*
  * PHY mode settings (EMAC <-> ZMII/RGMII bridge <-> PHY)
  */
-#define PHY_MODE_NA	0
-#define PHY_MODE_MII	1
-#define PHY_MODE_RMII	2
-#define PHY_MODE_SMII	3
-#define PHY_MODE_RGMII	4
-#define PHY_MODE_TBI	5
-#define PHY_MODE_GMII	6
-#define PHY_MODE_RTBI	7
-#define PHY_MODE_SGMII	8
+#define PHY_MODE_NA	PHY_INTERFACE_MODE_NA
+#define PHY_MODE_MII	PHY_INTERFACE_MODE_MII
+#define PHY_MODE_RMII	PHY_INTERFACE_MODE_RMII
+#define PHY_MODE_SMII	PHY_INTERFACE_MODE_SMII
+#define PHY_MODE_RGMII	PHY_INTERFACE_MODE_RGMII
+#define PHY_MODE_TBI	PHY_INTERFACE_MODE_TBI
+#define PHY_MODE_GMII	PHY_INTERFACE_MODE_GMII
+#define PHY_MODE_RTBI	PHY_INTERFACE_MODE_RTBI
+#define PHY_MODE_SGMII	PHY_INTERFACE_MODE_SGMII
 
 /* EMACx_MR0 */
 #define EMAC_MR0_RXI			0x80000000
diff --git a/drivers/net/ibm_newemac/phy.c b/drivers/net/ibm_newemac/phy.c
index ac9d964..ab4e596 100644
--- a/drivers/net/ibm_newemac/phy.c
+++ b/drivers/net/ibm_newemac/phy.c
@@ -28,12 +28,15 @@
 #include "emac.h"
 #include "phy.h"
 
-static inline int phy_read(struct mii_phy *phy, int reg)
+#define phy_read _phy_read
+#define phy_write _phy_write
+
+static inline int _phy_read(struct mii_phy *phy, int reg)
 {
 	return phy->mdio_read(phy->dev, phy->address, reg);
 }
 
-static inline void phy_write(struct mii_phy *phy, int reg, int val)
+static inline void _phy_write(struct mii_phy *phy, int reg, int val)
 {
 	phy->mdio_write(phy->dev, phy->address, reg, val);
 }
diff --git a/drivers/of/of_net.c b/drivers/of/of_net.c
index cc117db..bb18471 100644
--- a/drivers/of/of_net.c
+++ b/drivers/of/of_net.c
@@ -16,6 +16,7 @@
  * device driver can get phy interface from device tree.
  */
 static const char *phy_modes[] = {
+	[PHY_INTERFACE_MODE_NA]		= "",
 	[PHY_INTERFACE_MODE_MII]	= "mii",
 	[PHY_INTERFACE_MODE_GMII]	= "gmii",
 	[PHY_INTERFACE_MODE_SGMII]	= "sgmii",
@@ -26,6 +27,7 @@ static const char *phy_modes[] = {
 	[PHY_INTERFACE_MODE_RGMII_RXID]	= "rgmii-rxid",
 	[PHY_INTERFACE_MODE_RGMII_TXID] = "rgmii-txid",
 	[PHY_INTERFACE_MODE_RTBI]	= "rtbi",
+	[PHY_INTERFACE_MODE_SMII]	= "smii",
 };
 
 /**
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 7da5fa8..1622081 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -53,6 +53,7 @@
 
 /* Interface Mode definitions */
 typedef enum {
+	PHY_INTERFACE_MODE_NA,
 	PHY_INTERFACE_MODE_MII,
 	PHY_INTERFACE_MODE_GMII,
 	PHY_INTERFACE_MODE_SGMII,
@@ -62,7 +63,8 @@ typedef enum {
 	PHY_INTERFACE_MODE_RGMII_ID,
 	PHY_INTERFACE_MODE_RGMII_RXID,
 	PHY_INTERFACE_MODE_RGMII_TXID,
-	PHY_INTERFACE_MODE_RTBI
+	PHY_INTERFACE_MODE_RTBI,
+	PHY_INTERFACE_MODE_SMII,
 } phy_interface_t;
 
 
-- 
1.7.4.1

[PATCH v2 3/3] net/fec: add device tree probe support

[Shawn Guo]

It adds device tree probe support for fec driver.

Signed-off-by: Jason Liu <jason.hui@linaro.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
---
 Documentation/devicetree/bindings/net/fsl-fec.txt |   24 +++++
 drivers/net/fec.c                                 |   99 +++++++++++++++++++-
 2 files changed, 118 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/fsl-fec.txt

diff --git a/Documentation/devicetree/bindings/net/fsl-fec.txt b/Documentation/devicetree/bindings/net/fsl-fec.txt
new file mode 100644
index 0000000..1dad888
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/fsl-fec.txt
@@ -0,0 +1,24 @@
+* Freescale Fast Ethernet Controller (FEC)
+
+Required properties:
+- compatible : Should be "fsl,<soc>-fec"
+- reg : Address and length of the register set for the device
+- interrupts : Should contain fec interrupt
+- phy-mode : String, operation mode of the PHY interface.
+  Supported values are: "mii", "gmii", "sgmii", "tbi", "rmii",
+  "rgmii", "rgmii-id", "rgmii-rxid", "rgmii-txid", "rtbi".
+- gpios : Should specify the gpio for phy reset
+
+Optional properties:
+- local-mac-address : 6 bytes, mac address
+
+Example:
+
+fec@83fec000 {
+	compatible = "fsl,imx51-fec", "fsl,imx27-fec";
+	reg = <0x83fec000 0x4000>;
+	interrupts = <87>;
+	phy-mode = "mii";
+	gpios = <&gpio1 14 0>; /* phy-reset, GPIO2_14 */
+	local-mac-address = [00 04 9F 01 1B B9];
+};
diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index 7ae3f28..dec94f4 100644
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -44,6 +44,10 @@
 #include <linux/platform_device.h>
 #include <linux/phy.h>
 #include <linux/fec.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/of_net.h>
 
 #include <asm/cacheflush.h>
 
@@ -78,6 +82,17 @@ static struct platform_device_id fec_devtype[] = {
 	{ }
 };
 
+enum fec_type {
+	IMX27_FEC,
+	IMX28_FEC,
+};
+
+static const struct of_device_id fec_dt_ids[] = {
+	{ .compatible = "fsl,imx27-fec", .data = &fec_devtype[IMX27_FEC], },
+	{ .compatible = "fsl,imx28-fec", .data = &fec_devtype[IMX28_FEC], },
+	{ /* sentinel */ }
+};
+
 static unsigned char macaddr[ETH_ALEN];
 module_param_array(macaddr, byte, NULL, 0);
 MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address");
@@ -734,8 +749,22 @@ static void __inline__ fec_get_mac(struct net_device *ndev)
 	 */
 	iap = macaddr;
 
+#ifdef CONFIG_OF
+	/*
+	 * 2) from device tree data
+	 */
+	if (!is_valid_ether_addr(iap)) {
+		struct device_node *np = fep->pdev->dev.of_node;
+		if (np) {
+			const char *mac = of_get_mac_address(np);
+			if (mac)
+				iap = (unsigned char *) mac;
+		}
+	}
+#endif
+
 	/*
-	 * 2) from flash or fuse (via platform data)
+	 * 3) from flash or fuse (via platform data)
 	 */
 	if (!is_valid_ether_addr(iap)) {
 #ifdef CONFIG_M5272
@@ -748,7 +777,7 @@ static void __inline__ fec_get_mac(struct net_device *ndev)
 	}
 
 	/*
-	 * 3) FEC mac registers set by bootloader
+	 * 4) FEC mac registers set by bootloader
 	 */
 	if (!is_valid_ether_addr(iap)) {
 		*((unsigned long *) &tmpaddr[0]) =
@@ -1358,6 +1387,53 @@ static int fec_enet_init(struct net_device *ndev)
 	return 0;
 }
 
+#ifdef CONFIG_OF
+static int __devinit fec_get_phy_mode_dt(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+
+	if (np)
+		return of_get_phy_mode(np);
+
+	return -ENODEV;
+}
+
+static int __devinit fec_reset_phy(struct platform_device *pdev)
+{
+	int err, phy_reset;
+	struct device_node *np = pdev->dev.of_node;
+
+	if (!np)
+		return -ENODEV;
+
+	phy_reset = of_get_gpio(np, 0);
+	err = gpio_request_one(phy_reset, GPIOF_OUT_INIT_LOW, "phy-reset");
+	if (err) {
+		pr_warn("FEC: failed to get gpio phy-reset: %d\n", err);
+		return err;
+	}
+
+	msleep(1);
+	gpio_set_value(phy_reset, 1);
+
+	return 0;
+}
+#else /* CONFIG_OF */
+static inline int fec_get_phy_mode_dt(struct platform_device *pdev)
+{
+	return -ENODEV;
+}
+
+static inline int fec_reset_phy(struct platform_device *pdev)
+{
+	/*
+	 * In case of platform probe, the reset has been done
+	 * by machine code.
+	 */
+	return 0;
+}
+#endif /* CONFIG_OF */
+
 static int __devinit
 fec_probe(struct platform_device *pdev)
 {
@@ -1366,6 +1442,11 @@ fec_probe(struct platform_device *pdev)
 	struct net_device *ndev;
 	int i, irq, ret = 0;
 	struct resource *r;
+	const struct of_device_id *of_id;
+
+	of_id = of_match_device(fec_dt_ids, &pdev->dev);
+	if (of_id)
+		pdev->id_entry = of_id->data;
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!r)
@@ -1397,9 +1478,16 @@ fec_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, ndev);
 
-	pdata = pdev->dev.platform_data;
-	if (pdata)
-		fep->phy_interface = pdata->phy;
+	fep->phy_interface = fec_get_phy_mode_dt(pdev);
+	if (fep->phy_interface < 0) {
+		pdata = pdev->dev.platform_data;
+		if (pdata)
+			fep->phy_interface = pdata->phy;
+		else
+			fep->phy_interface = PHY_INTERFACE_MODE_MII;
+	}
+
+	fec_reset_phy(pdev);
 
 	/* This device has up to three irqs on some platforms */
 	for (i = 0; i < 3; i++) {
@@ -1534,6 +1622,7 @@ static struct platform_driver fec_driver = {
 #ifdef CONFIG_PM
 		.pm	= &fec_pm_ops,
 #endif
+		.of_match_table = fec_dt_ids,
 	},
 	.id_table = fec_devtype,
 	.probe	= fec_probe,
-- 
1.7.4.1

Re: [PATCH v2 1/3] dt/net: add helper function of_get_phy_mode

[Grant Likely]

On Tue, Jul 5, 2011 at 9:13 AM, Shawn Guo <shawn.guo@linaro.org> wrote:
> It adds the helper function of_get_phy_mode getting phy interface
> from device tree.
>
> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
> Cc: Grant Likely <grant.likely@secretlab.ca>

Acked-by: Grant Likely <grant.likely@secretlab.ca>

Dave, this should probably get merged via your tree since the rest of
this series depends on it.

g.

> ---
>  drivers/of/of_net.c    |   43 +++++++++++++++++++++++++++++++++++++++++++
>  include/linux/of_net.h |    1 +
>  2 files changed, 44 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/of/of_net.c b/drivers/of/of_net.c
> index 86f334a..cc117db 100644
> --- a/drivers/of/of_net.c
> +++ b/drivers/of/of_net.c
> @@ -8,6 +8,49 @@
>  #include <linux/etherdevice.h>
>  #include <linux/kernel.h>
>  #include <linux/of_net.h>
> +#include <linux/phy.h>
> +
> +/**
> + * It maps 'enum phy_interface_t' found in include/linux/phy.h
> + * into the device tree binding of 'phy-mode', so that Ethernet
> + * device driver can get phy interface from device tree.
> + */
> +static const char *phy_modes[] = {
> +       [PHY_INTERFACE_MODE_MII]        = "mii",
> +       [PHY_INTERFACE_MODE_GMII]       = "gmii",
> +       [PHY_INTERFACE_MODE_SGMII]      = "sgmii",
> +       [PHY_INTERFACE_MODE_TBI]        = "tbi",
> +       [PHY_INTERFACE_MODE_RMII]       = "rmii",
> +       [PHY_INTERFACE_MODE_RGMII]      = "rgmii",
> +       [PHY_INTERFACE_MODE_RGMII_ID]   = "rgmii-id",
> +       [PHY_INTERFACE_MODE_RGMII_RXID] = "rgmii-rxid",
> +       [PHY_INTERFACE_MODE_RGMII_TXID] = "rgmii-txid",
> +       [PHY_INTERFACE_MODE_RTBI]       = "rtbi",
> +};
> +
> +/**
> + * of_get_phy_mode - Get phy mode for given device_node
> + * @np:        Pointer to the given device_node
> + *
> + * The function gets phy interface string from property 'phy-mode',
> + * and return its index in phy_modes table, or errno in error case.
> + */
> +const int of_get_phy_mode(struct device_node *np)
> +{
> +       const char *pm;
> +       int err, i;
> +
> +       err = of_property_read_string(np, "phy-mode", &pm);
> +       if (err < 0)
> +               return err;
> +
> +       for (i = 0; i < ARRAY_SIZE(phy_modes); i++)
> +               if (!strcasecmp(pm, phy_modes[i]))
> +                       return i;
> +
> +       return -ENODEV;
> +}
> +EXPORT_SYMBOL_GPL(of_get_phy_mode);
>
>  /**
>  * Search the device tree for the best MAC address to use.  'mac-address' is
> diff --git a/include/linux/of_net.h b/include/linux/of_net.h
> index e913081..f474641 100644
> --- a/include/linux/of_net.h
> +++ b/include/linux/of_net.h
> @@ -9,6 +9,7 @@
>
>  #ifdef CONFIG_OF_NET
>  #include <linux/of.h>
> +extern const int of_get_phy_mode(struct device_node *np);
>  extern const void *of_get_mac_address(struct device_node *np);
>  #endif
>
> --
> 1.7.4.1
>
>
>



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

Re: [PATCH v2 2/3] net: ibm_newemac: convert it to use of_get_phy_mode

[Grant Likely]

On Tue, Jul 5, 2011 at 9:13 AM, Shawn Guo <shawn.guo@linaro.org> wrote:
> The patch extends 'enum phy_interface_t' and of_get_phy_mode a little
> bit with PHY_INTERFACE_MODE_NA and PHY_INTERFACE_MODE_SMII added,
> and then converts ibm_newemac net driver to use of_get_phy_mode
> getting phy mode from device tree.
>
> It also resolves the namespace conflict on phy_read/write between
> common mdiobus interface and ibm_newemac private one.
>
> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
> Cc: David S. Miller <davem@davemloft.net>
> Cc: Grant Likely <grant.likely@secretlab.ca>

I'm okay with this, but I'm don't know if it is a good idea to add the
new PHY_INTERFACE_MODE defines (but I cannot think of a reason why
not).  I'll let someone else comment on that.

Acked-by: Grant Likely <grant.likely@secretlab.ca>


> ---
>  drivers/net/ibm_newemac/core.c |   33 ++++-----------------------------
>  drivers/net/ibm_newemac/emac.h |   19 ++++++++++---------
>  drivers/net/ibm_newemac/phy.c  |    7 +++++--
>  drivers/of/of_net.c            |    2 ++
>  include/linux/phy.h            |    4 +++-
>  5 files changed, 24 insertions(+), 41 deletions(-)
>
> diff --git a/drivers/net/ibm_newemac/core.c b/drivers/net/ibm_newemac/core.c
> index 725399e..70cb7d8 100644
> --- a/drivers/net/ibm_newemac/core.c
> +++ b/drivers/net/ibm_newemac/core.c
> @@ -39,6 +39,7 @@
>  #include <linux/bitops.h>
>  #include <linux/workqueue.h>
>  #include <linux/of.h>
> +#include <linux/of_net.h>
>  #include <linux/slab.h>
>
>  #include <asm/processor.h>
> @@ -2506,18 +2507,6 @@ static int __devinit emac_init_config(struct emac_instance *dev)
>  {
>        struct device_node *np = dev->ofdev->dev.of_node;
>        const void *p;
> -       unsigned int plen;
> -       const char *pm, *phy_modes[] = {
> -               [PHY_MODE_NA] = "",
> -               [PHY_MODE_MII] = "mii",
> -               [PHY_MODE_RMII] = "rmii",
> -               [PHY_MODE_SMII] = "smii",
> -               [PHY_MODE_RGMII] = "rgmii",
> -               [PHY_MODE_TBI] = "tbi",
> -               [PHY_MODE_GMII] = "gmii",
> -               [PHY_MODE_RTBI] = "rtbi",
> -               [PHY_MODE_SGMII] = "sgmii",
> -       };
>
>        /* Read config from device-tree */
>        if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1))
> @@ -2566,23 +2555,9 @@ static int __devinit emac_init_config(struct emac_instance *dev)
>                dev->mal_burst_size = 256;
>
>        /* PHY mode needs some decoding */
> -       dev->phy_mode = PHY_MODE_NA;
> -       pm = of_get_property(np, "phy-mode", &plen);
> -       if (pm != NULL) {
> -               int i;
> -               for (i = 0; i < ARRAY_SIZE(phy_modes); i++)
> -                       if (!strcasecmp(pm, phy_modes[i])) {
> -                               dev->phy_mode = i;
> -                               break;
> -                       }
> -       }
> -
> -       /* Backward compat with non-final DT */
> -       if (dev->phy_mode == PHY_MODE_NA && pm != NULL && plen == 4) {
> -               u32 nmode = *(const u32 *)pm;
> -               if (nmode > PHY_MODE_NA && nmode <= PHY_MODE_SGMII)
> -                       dev->phy_mode = nmode;
> -       }
> +       dev->phy_mode = of_get_phy_mode(np);
> +       if (dev->phy_mode < 0)
> +               dev->phy_mode = PHY_MODE_NA;
>
>        /* Check EMAC version */
>        if (of_device_is_compatible(np, "ibm,emac4sync")) {
> diff --git a/drivers/net/ibm_newemac/emac.h b/drivers/net/ibm_newemac/emac.h
> index 8a61b597..1568278 100644
> --- a/drivers/net/ibm_newemac/emac.h
> +++ b/drivers/net/ibm_newemac/emac.h
> @@ -26,6 +26,7 @@
>  #define __IBM_NEWEMAC_H
>
>  #include <linux/types.h>
> +#include <linux/phy.h>
>
>  /* EMAC registers                      Write Access rules */
>  struct emac_regs {
> @@ -106,15 +107,15 @@ struct emac_regs {
>  /*
>  * PHY mode settings (EMAC <-> ZMII/RGMII bridge <-> PHY)
>  */
> -#define PHY_MODE_NA    0
> -#define PHY_MODE_MII   1
> -#define PHY_MODE_RMII  2
> -#define PHY_MODE_SMII  3
> -#define PHY_MODE_RGMII 4
> -#define PHY_MODE_TBI   5
> -#define PHY_MODE_GMII  6
> -#define PHY_MODE_RTBI  7
> -#define PHY_MODE_SGMII 8
> +#define PHY_MODE_NA    PHY_INTERFACE_MODE_NA
> +#define PHY_MODE_MII   PHY_INTERFACE_MODE_MII
> +#define PHY_MODE_RMII  PHY_INTERFACE_MODE_RMII
> +#define PHY_MODE_SMII  PHY_INTERFACE_MODE_SMII
> +#define PHY_MODE_RGMII PHY_INTERFACE_MODE_RGMII
> +#define PHY_MODE_TBI   PHY_INTERFACE_MODE_TBI
> +#define PHY_MODE_GMII  PHY_INTERFACE_MODE_GMII
> +#define PHY_MODE_RTBI  PHY_INTERFACE_MODE_RTBI
> +#define PHY_MODE_SGMII PHY_INTERFACE_MODE_SGMII
>
>  /* EMACx_MR0 */
>  #define EMAC_MR0_RXI                   0x80000000
> diff --git a/drivers/net/ibm_newemac/phy.c b/drivers/net/ibm_newemac/phy.c
> index ac9d964..ab4e596 100644
> --- a/drivers/net/ibm_newemac/phy.c
> +++ b/drivers/net/ibm_newemac/phy.c
> @@ -28,12 +28,15 @@
>  #include "emac.h"
>  #include "phy.h"
>
> -static inline int phy_read(struct mii_phy *phy, int reg)
> +#define phy_read _phy_read
> +#define phy_write _phy_write
> +
> +static inline int _phy_read(struct mii_phy *phy, int reg)
>  {
>        return phy->mdio_read(phy->dev, phy->address, reg);
>  }
>
> -static inline void phy_write(struct mii_phy *phy, int reg, int val)
> +static inline void _phy_write(struct mii_phy *phy, int reg, int val)
>  {
>        phy->mdio_write(phy->dev, phy->address, reg, val);
>  }
> diff --git a/drivers/of/of_net.c b/drivers/of/of_net.c
> index cc117db..bb18471 100644
> --- a/drivers/of/of_net.c
> +++ b/drivers/of/of_net.c
> @@ -16,6 +16,7 @@
>  * device driver can get phy interface from device tree.
>  */
>  static const char *phy_modes[] = {
> +       [PHY_INTERFACE_MODE_NA]         = "",
>        [PHY_INTERFACE_MODE_MII]        = "mii",
>        [PHY_INTERFACE_MODE_GMII]       = "gmii",
>        [PHY_INTERFACE_MODE_SGMII]      = "sgmii",
> @@ -26,6 +27,7 @@ static const char *phy_modes[] = {
>        [PHY_INTERFACE_MODE_RGMII_RXID] = "rgmii-rxid",
>        [PHY_INTERFACE_MODE_RGMII_TXID] = "rgmii-txid",
>        [PHY_INTERFACE_MODE_RTBI]       = "rtbi",
> +       [PHY_INTERFACE_MODE_SMII]       = "smii",
>  };
>
>  /**
> diff --git a/include/linux/phy.h b/include/linux/phy.h
> index 7da5fa8..1622081 100644
> --- a/include/linux/phy.h
> +++ b/include/linux/phy.h
> @@ -53,6 +53,7 @@
>
>  /* Interface Mode definitions */
>  typedef enum {
> +       PHY_INTERFACE_MODE_NA,
>        PHY_INTERFACE_MODE_MII,
>        PHY_INTERFACE_MODE_GMII,
>        PHY_INTERFACE_MODE_SGMII,
> @@ -62,7 +63,8 @@ typedef enum {
>        PHY_INTERFACE_MODE_RGMII_ID,
>        PHY_INTERFACE_MODE_RGMII_RXID,
>        PHY_INTERFACE_MODE_RGMII_TXID,
> -       PHY_INTERFACE_MODE_RTBI
> +       PHY_INTERFACE_MODE_RTBI,
> +       PHY_INTERFACE_MODE_SMII,
>  } phy_interface_t;
>
>
> --
> 1.7.4.1
>
>
>



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

Re: [PATCH v2 3/3] net/fec: add device tree probe support

[Grant Likely]

On Tue, Jul 5, 2011 at 9:13 AM, Shawn Guo <shawn.guo@linaro.org> wrote:
> It adds device tree probe support for fec driver.
>
> Signed-off-by: Jason Liu <jason.hui@linaro.org>
> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
> Cc: David S. Miller <davem@davemloft.net>
> Cc: Grant Likely <grant.likely@secretlab.ca>
> Acked-by: Grant Likely <grant.likely@secretlab.ca>

Minor comments below, but my Acked-by above still stands.

g.

> ---
>  Documentation/devicetree/bindings/net/fsl-fec.txt |   24 +++++
>  drivers/net/fec.c                                 |   99 +++++++++++++++++++-
>  2 files changed, 118 insertions(+), 5 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/net/fsl-fec.txt
>
> diff --git a/Documentation/devicetree/bindings/net/fsl-fec.txt b/Documentation/devicetree/bindings/net/fsl-fec.txt
> new file mode 100644
> index 0000000..1dad888
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/fsl-fec.txt
> @@ -0,0 +1,24 @@
> +* Freescale Fast Ethernet Controller (FEC)
> +
> +Required properties:
> +- compatible : Should be "fsl,<soc>-fec"
> +- reg : Address and length of the register set for the device
> +- interrupts : Should contain fec interrupt
> +- phy-mode : String, operation mode of the PHY interface.
> +  Supported values are: "mii", "gmii", "sgmii", "tbi", "rmii",
> +  "rgmii", "rgmii-id", "rgmii-rxid", "rgmii-txid", "rtbi".
> +- gpios : Should specify the gpio for phy reset

Let's be explicit for the gpio property: phy-reset-gpios.

> +
> +Optional properties:
> +- local-mac-address : 6 bytes, mac address
> +
> +Example:
> +
> +fec@83fec000 {
> +       compatible = "fsl,imx51-fec", "fsl,imx27-fec";
> +       reg = <0x83fec000 0x4000>;
> +       interrupts = <87>;
> +       phy-mode = "mii";
> +       gpios = <&gpio1 14 0>; /* phy-reset, GPIO2_14 */
> +       local-mac-address = [00 04 9F 01 1B B9];
> +};
> diff --git a/drivers/net/fec.c b/drivers/net/fec.c
> index 7ae3f28..dec94f4 100644
> --- a/drivers/net/fec.c
> +++ b/drivers/net/fec.c
> @@ -44,6 +44,10 @@
>  #include <linux/platform_device.h>
>  #include <linux/phy.h>
>  #include <linux/fec.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/of_gpio.h>
> +#include <linux/of_net.h>
>
>  #include <asm/cacheflush.h>
>
> @@ -78,6 +82,17 @@ static struct platform_device_id fec_devtype[] = {
>        { }
>  };
>
> +enum fec_type {
> +       IMX27_FEC,
> +       IMX28_FEC,
> +};
> +
> +static const struct of_device_id fec_dt_ids[] = {
> +       { .compatible = "fsl,imx27-fec", .data = &fec_devtype[IMX27_FEC], },
> +       { .compatible = "fsl,imx28-fec", .data = &fec_devtype[IMX28_FEC], },
> +       { /* sentinel */ }
> +};
> +
>  static unsigned char macaddr[ETH_ALEN];
>  module_param_array(macaddr, byte, NULL, 0);
>  MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address");
> @@ -734,8 +749,22 @@ static void __inline__ fec_get_mac(struct net_device *ndev)
>         */
>        iap = macaddr;
>
> +#ifdef CONFIG_OF
> +       /*
> +        * 2) from device tree data
> +        */
> +       if (!is_valid_ether_addr(iap)) {
> +               struct device_node *np = fep->pdev->dev.of_node;
> +               if (np) {
> +                       const char *mac = of_get_mac_address(np);
> +                       if (mac)
> +                               iap = (unsigned char *) mac;
> +               }
> +       }
> +#endif
> +
>        /*
> -        * 2) from flash or fuse (via platform data)
> +        * 3) from flash or fuse (via platform data)
>         */
>        if (!is_valid_ether_addr(iap)) {
>  #ifdef CONFIG_M5272
> @@ -748,7 +777,7 @@ static void __inline__ fec_get_mac(struct net_device *ndev)
>        }
>
>        /*
> -        * 3) FEC mac registers set by bootloader
> +        * 4) FEC mac registers set by bootloader
>         */
>        if (!is_valid_ether_addr(iap)) {
>                *((unsigned long *) &tmpaddr[0]) =
> @@ -1358,6 +1387,53 @@ static int fec_enet_init(struct net_device *ndev)
>        return 0;
>  }
>
> +#ifdef CONFIG_OF
> +static int __devinit fec_get_phy_mode_dt(struct platform_device *pdev)
> +{
> +       struct device_node *np = pdev->dev.of_node;
> +
> +       if (np)
> +               return of_get_phy_mode(np);
> +
> +       return -ENODEV;
> +}
> +
> +static int __devinit fec_reset_phy(struct platform_device *pdev)
> +{
> +       int err, phy_reset;
> +       struct device_node *np = pdev->dev.of_node;
> +
> +       if (!np)
> +               return -ENODEV;
> +
> +       phy_reset = of_get_gpio(np, 0);
> +       err = gpio_request_one(phy_reset, GPIOF_OUT_INIT_LOW, "phy-reset");
> +       if (err) {
> +               pr_warn("FEC: failed to get gpio phy-reset: %d\n", err);
> +               return err;
> +       }
> +
> +       msleep(1);
> +       gpio_set_value(phy_reset, 1);
> +
> +       return 0;
> +}
> +#else /* CONFIG_OF */
> +static inline int fec_get_phy_mode_dt(struct platform_device *pdev)
> +{
> +       return -ENODEV;
> +}
> +
> +static inline int fec_reset_phy(struct platform_device *pdev)
> +{
> +       /*
> +        * In case of platform probe, the reset has been done
> +        * by machine code.
> +        */
> +       return 0;

Perhaps platform code should be reworked to use GPIO also.

> +}
> +#endif /* CONFIG_OF */
> +
>  static int __devinit
>  fec_probe(struct platform_device *pdev)
>  {
> @@ -1366,6 +1442,11 @@ fec_probe(struct platform_device *pdev)
>        struct net_device *ndev;
>        int i, irq, ret = 0;
>        struct resource *r;
> +       const struct of_device_id *of_id;
> +
> +       of_id = of_match_device(fec_dt_ids, &pdev->dev);
> +       if (of_id)
> +               pdev->id_entry = of_id->data;
>
>        r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>        if (!r)
> @@ -1397,9 +1478,16 @@ fec_probe(struct platform_device *pdev)
>
>        platform_set_drvdata(pdev, ndev);
>
> -       pdata = pdev->dev.platform_data;
> -       if (pdata)
> -               fep->phy_interface = pdata->phy;
> +       fep->phy_interface = fec_get_phy_mode_dt(pdev);
> +       if (fep->phy_interface < 0) {
> +               pdata = pdev->dev.platform_data;
> +               if (pdata)
> +                       fep->phy_interface = pdata->phy;
> +               else
> +                       fep->phy_interface = PHY_INTERFACE_MODE_MII;
> +       }
> +
> +       fec_reset_phy(pdev);
>
>        /* This device has up to three irqs on some platforms */
>        for (i = 0; i < 3; i++) {
> @@ -1534,6 +1622,7 @@ static struct platform_driver fec_driver = {
>  #ifdef CONFIG_PM
>                .pm     = &fec_pm_ops,
>  #endif
> +               .of_match_table = fec_dt_ids,
>        },
>        .id_table = fec_devtype,
>        .probe  = fec_probe,
> --
> 1.7.4.1
>
>
>



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

Re: [PATCH v2 0/3] Add device tree probe support for imx fec driver

[David Miller]

From: Shawn Guo <shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Date: Tue, 5 Jul 2011 23:13:56 +0800

> The first two patches are a little off topic.  Patch #1 adds a helper
> function of_get_phy_mode into of_net, and #2 converts ibm_newemac net
> driver to use this helper function.  Patch #3 is the actual one adding
> tree probe support for imx fec driver, with of_get_phy_mode being used.
> 
> Changes since v1:
>  * Address review comments given by Grant
>  * Add patch #1 and #2
> 
> Shawn Guo (3):
>       dt/net: add helper function of_get_phy_mode
>       net: ibm_newemac: convert it to use of_get_phy_mode
>       net/fec: add device tree probe support

All applied to net-next-2.6, thanks.

Re: [PATCH v2 0/3] Add device tree probe support for imx fec driver

[David Miller]

From: David Miller <davem@davemloft.net>
Date: Tue, 05 Jul 2011 19:48:54 -0700 (PDT)

> All applied to net-next-2.6, thanks.

Come on guys:

drivers/of/of_net.c: In function 'of_get_phy_mode':
drivers/of/of_net.c:45: error: implicit declaration of function 'of_property_read_string'

This is completely rediculious.

Don't tell me that it's appropriate to merge something into
my net tree when it uses interfaces that don't even exist
in Linus's tree.

Re: [PATCH v2 0/3] Add device tree probe support for imx fec driver

[Grant Likely]

On Tue, Jul 05, 2011 at 10:30:45PM -0700, David Miller wrote:
> From: David Miller <davem@davemloft.net>
> Date: Tue, 05 Jul 2011 19:48:54 -0700 (PDT)
> 
> > All applied to net-next-2.6, thanks.
> 
> Come on guys:
> 
> drivers/of/of_net.c: In function 'of_get_phy_mode':
> drivers/of/of_net.c:45: error: implicit declaration of function 'of_property_read_string'
> 
> This is completely rediculious.
> 
> Don't tell me that it's appropriate to merge something into
> my net tree when it uses interfaces that don't even exist
> in Linus's tree.

Sorry about that, I missed the reference to that function which is
currently in my devicetree/next branch.  I can either take the series
via devicetree/next, or I can provide you with a topic branch
containing the needed commit that you can merge.  Whichever you prefer.

g.

Re: [PATCH v2 0/3] Add device tree probe support for imx fec driver

[David Miller]

From: Grant Likely <grant.likely@secretlab.ca>
Date: Wed, 6 Jul 2011 00:19:01 -0600

> Sorry about that, I missed the reference to that function which is
> currently in my devicetree/next branch.  I can either take the series
> via devicetree/next, or I can provide you with a topic branch
> containing the needed commit that you can merge.  Whichever you prefer.

Please just take the series, thanks.

Re: [PATCH v2 0/3] Add device tree probe support for imx fec driver

[Grant Likely]

On Tue, Jul 05, 2011 at 11:22:52PM -0700, David Miller wrote:
> From: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
> Date: Wed, 6 Jul 2011 00:19:01 -0600
> 
> > Sorry about that, I missed the reference to that function which is
> > currently in my devicetree/next branch.  I can either take the series
> > via devicetree/next, or I can provide you with a topic branch
> > containing the needed commit that you can merge.  Whichever you prefer.
> 
> Please just take the series, thanks.

Will do.

g.

Re: [PATCH v2 0/3] Add device tree probe support for imx fec driver

[Shawn Guo]

On Wed, Jul 06, 2011 at 12:29:01AM -0600, Grant Likely wrote:
> On Tue, Jul 05, 2011 at 11:22:52PM -0700, David Miller wrote:
> > From: Grant Likely <grant.likely@secretlab.ca>
> > Date: Wed, 6 Jul 2011 00:19:01 -0600
> > 
> > > Sorry about that, I missed the reference to that function which is
> > > currently in my devicetree/next branch.  I can either take the series
> > > via devicetree/next, or I can provide you with a topic branch
> > > containing the needed commit that you can merge.  Whichever you prefer.
> > 
> > Please just take the series, thanks.
> 
> Will do.
> 
Grant, please hold for a while.  I will send an update to use
of_get_named_gpio for phy-reset-gpios.

-- 
Regards,
Shawn

[PATCH RESEND v2 3/3] net/fec: add device tree probe support

[Shawn Guo]

It adds device tree probe support for fec driver.

Signed-off-by: Jason Liu <jason.hui@linaro.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
---
Resend with changes:
 * use of_get_named_gpio for phy-reset-gpios

 Documentation/devicetree/bindings/net/fsl-fec.txt |   24 +++++
 drivers/net/fec.c                                 |   98 +++++++++++++++++++-
 2 files changed, 117 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/fsl-fec.txt

diff --git a/Documentation/devicetree/bindings/net/fsl-fec.txt b/Documentation/devicetree/bindings/net/fsl-fec.txt
new file mode 100644
index 0000000..de43951
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/fsl-fec.txt
@@ -0,0 +1,24 @@
+* Freescale Fast Ethernet Controller (FEC)
+
+Required properties:
+- compatible : Should be "fsl,<soc>-fec"
+- reg : Address and length of the register set for the device
+- interrupts : Should contain fec interrupt
+- phy-mode : String, operation mode of the PHY interface.
+  Supported values are: "mii", "gmii", "sgmii", "tbi", "rmii",
+  "rgmii", "rgmii-id", "rgmii-rxid", "rgmii-txid", "rtbi", "smii".
+- phy-reset-gpios : Should specify the gpio for phy reset
+
+Optional properties:
+- local-mac-address : 6 bytes, mac address
+
+Example:
+
+fec@83fec000 {
+	compatible = "fsl,imx51-fec", "fsl,imx27-fec";
+	reg = <0x83fec000 0x4000>;
+	interrupts = <87>;
+	phy-mode = "mii";
+	phy-reset-gpios = <&gpio1 14 0>; /* GPIO2_14 */
+	local-mac-address = [00 04 9F 01 1B B9];
+};
diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index 7ae3f28..720aa63 100644
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -44,6 +44,10 @@
 #include <linux/platform_device.h>
 #include <linux/phy.h>
 #include <linux/fec.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/of_net.h>
 
 #include <asm/cacheflush.h>
 
@@ -78,6 +82,17 @@ static struct platform_device_id fec_devtype[] = {
 	{ }
 };
 
+enum fec_type {
+	IMX27_FEC,
+	IMX28_FEC,
+};
+
+static const struct of_device_id fec_dt_ids[] = {
+	{ .compatible = "fsl,imx27-fec", .data = &fec_devtype[IMX27_FEC], },
+	{ .compatible = "fsl,imx28-fec", .data = &fec_devtype[IMX28_FEC], },
+	{ /* sentinel */ }
+};
+
 static unsigned char macaddr[ETH_ALEN];
 module_param_array(macaddr, byte, NULL, 0);
 MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address");
@@ -734,8 +749,22 @@ static void __inline__ fec_get_mac(struct net_device *ndev)
 	 */
 	iap = macaddr;
 
+#ifdef CONFIG_OF
+	/*
+	 * 2) from device tree data
+	 */
+	if (!is_valid_ether_addr(iap)) {
+		struct device_node *np = fep->pdev->dev.of_node;
+		if (np) {
+			const char *mac = of_get_mac_address(np);
+			if (mac)
+				iap = (unsigned char *) mac;
+		}
+	}
+#endif
+
 	/*
-	 * 2) from flash or fuse (via platform data)
+	 * 3) from flash or fuse (via platform data)
 	 */
 	if (!is_valid_ether_addr(iap)) {
 #ifdef CONFIG_M5272
@@ -748,7 +777,7 @@ static void __inline__ fec_get_mac(struct net_device *ndev)
 	}
 
 	/*
-	 * 3) FEC mac registers set by bootloader
+	 * 4) FEC mac registers set by bootloader
 	 */
 	if (!is_valid_ether_addr(iap)) {
 		*((unsigned long *) &tmpaddr[0]) =
@@ -1358,6 +1387,52 @@ static int fec_enet_init(struct net_device *ndev)
 	return 0;
 }
 
+#ifdef CONFIG_OF
+static int __devinit fec_get_phy_mode_dt(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+
+	if (np)
+		return of_get_phy_mode(np);
+
+	return -ENODEV;
+}
+
+static int __devinit fec_reset_phy(struct platform_device *pdev)
+{
+	int err, phy_reset;
+	struct device_node *np = pdev->dev.of_node;
+
+	if (!np)
+		return -ENODEV;
+
+	phy_reset = of_get_named_gpio(np, "phy-reset-gpios", 0);
+	err = gpio_request_one(phy_reset, GPIOF_OUT_INIT_LOW, "phy-reset");
+	if (err) {
+		pr_warn("FEC: failed to get gpio phy-reset: %d\n", err);
+		return err;
+	}
+
+	gpio_set_value(phy_reset, 1);
+
+	return 0;
+}
+#else /* CONFIG_OF */
+static inline int fec_get_phy_mode_dt(struct platform_device *pdev)
+{
+	return -ENODEV;
+}
+
+static inline int fec_reset_phy(struct platform_device *pdev)
+{
+	/*
+	 * In case of platform probe, the reset has been done
+	 * by machine code.
+	 */
+	return 0;
+}
+#endif /* CONFIG_OF */
+
 static int __devinit
 fec_probe(struct platform_device *pdev)
 {
@@ -1366,6 +1441,11 @@ fec_probe(struct platform_device *pdev)
 	struct net_device *ndev;
 	int i, irq, ret = 0;
 	struct resource *r;
+	const struct of_device_id *of_id;
+
+	of_id = of_match_device(fec_dt_ids, &pdev->dev);
+	if (of_id)
+		pdev->id_entry = of_id->data;
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!r)
@@ -1397,9 +1477,16 @@ fec_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, ndev);
 
-	pdata = pdev->dev.platform_data;
-	if (pdata)
-		fep->phy_interface = pdata->phy;
+	fep->phy_interface = fec_get_phy_mode_dt(pdev);
+	if (fep->phy_interface < 0) {
+		pdata = pdev->dev.platform_data;
+		if (pdata)
+			fep->phy_interface = pdata->phy;
+		else
+			fep->phy_interface = PHY_INTERFACE_MODE_MII;
+	}
+
+	fec_reset_phy(pdev);
 
 	/* This device has up to three irqs on some platforms */
 	for (i = 0; i < 3; i++) {
@@ -1534,6 +1621,7 @@ static struct platform_driver fec_driver = {
 #ifdef CONFIG_PM
 		.pm	= &fec_pm_ops,
 #endif
+		.of_match_table = fec_dt_ids,
 	},
 	.id_table = fec_devtype,
 	.probe	= fec_probe,
-- 
1.7.4.1

Re: [PATCH v2 0/3] Add device tree probe support for imx fec driver

[Shawn Guo]

On Tue, Jul 05, 2011 at 11:22:52PM -0700, David Miller wrote:
> From: Grant Likely <grant.likely@secretlab.ca>
> Date: Wed, 6 Jul 2011 00:19:01 -0600
> 
> > Sorry about that, I missed the reference to that function which is
> > currently in my devicetree/next branch.  I can either take the series
> > via devicetree/next, or I can provide you with a topic branch
> > containing the needed commit that you can merge.  Whichever you prefer.
> 
> Please just take the series, thanks.
> 
I think the easier way is that I repost the series after
devicetree/next and i.mx tree get merged in the coming window, and
let them go through i.mx tree.

David, I assume I can add your acks to all 3 patches, otherwise
please let me know.

-- 
Regards,
Shawn

Re: [PATCH v2 0/3] Add device tree probe support for imx fec driver

[David Miller]

From: Shawn Guo <shawn.guo@freescale.com>
Date: Fri, 22 Jul 2011 10:08:19 +0800

> David, I assume I can add your acks to all 3 patches, otherwise
> please let me know.

Yes, you can.