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Commit 1f9127ca authored by Zach Brown's avatar Zach Brown Committed by David S. Miller
Browse files

net: phy: Create phy_supported_speeds function which lists speeds currently... 


net: phy: Create phy_supported_speeds function which lists speeds currently supported by a phydevice

phy_supported_speeds provides a means to get a list of all the speeds a
phy device currently supports.

Signed-off-by: default avatarZach Brown <zach.brown@ni.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 61a17965

drivers/net/phy/phy.c

+35 −0
Original line number Diff line number Diff line
@@ -260,6 +260,41 @@ static inline unsigned int phy_find_valid(unsigned int idx, u32 features) 
	return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;

}



/**

 * phy_supported_speeds - return all speeds currently supported by a phy device

 * @phy: The phy device to return supported speeds of.

 * @speeds: buffer to store supported speeds in.

 * @size:   size of speeds buffer.

 *

 * Description: Returns the number of supported speeds, and fills the speeds

 * buffer with the supported speeds. If speeds buffer is too small to contain

 * all currently supported speeds, will return as many speeds as can fit.

 */

unsigned int phy_supported_speeds(struct phy_device *phy,

				  unsigned int *speeds,

				  unsigned int size)

{

	unsigned int count = 0;

	unsigned int idx = 0;



	while (idx < MAX_NUM_SETTINGS && count < size) {

		idx = phy_find_valid(idx, phy->supported);



		if (!(settings[idx].setting & phy->supported))

			break;



		/* Assumes settings are grouped by speed */

		if ((count == 0) ||

		    (speeds[count - 1] != settings[idx].speed)) {

			speeds[count] = settings[idx].speed;

			count++;

		}

		idx++;

	}



	return count;

}



/**

 * phy_check_valid - check if there is a valid PHY setting which matches

 *		     speed, duplex, and feature mask

include/linux/phy.h

+15 −0
Original line number Diff line number Diff line
@@ -84,6 +84,21 @@ typedef enum { 
	PHY_INTERFACE_MODE_MAX,

} phy_interface_t;



/**

 * phy_supported_speeds - return all speeds currently supported by a phy device

 * @phy: The phy device to return supported speeds of.

 * @speeds: buffer to store supported speeds in.

 * @size: size of speeds buffer.

 *

 * Description: Returns the number of supported speeds, and

 * fills the speeds * buffer with the supported speeds. If speeds buffer is

 * too small to contain * all currently supported speeds, will return as

 * many speeds as can fit.

 */

unsigned int phy_supported_speeds(struct phy_device *phy,

				      unsigned int *speeds,

				      unsigned int size);



/**

 * It maps 'enum phy_interface_t' found in include/linux/phy.h

 * into the device tree binding of 'phy-mode', so that Ethernet