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Commit 6ca1a113 authored by Shawn Guo's avatar Shawn Guo
Browse files

dt/net: add helper function of_get_phy_mode 



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

Signed-off-by: default avatarShawn Guo <shawn.guo@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Acked-by: default avatarGrant Likely <grant.likely@secretlab.ca>
Acked-by: default avatarDavid Miller <davem@davemloft.net>
parent 0ca1e290

drivers/of/of_net.c

+43 −0
Original line number Diff line number Diff line
@@ -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

include/linux/of_net.h

+1 −0
Original line number Diff line number Diff line
@@ -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