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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: Zach Brown <zach.brown@ni.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Zach Brown 2016-10-17 10:49:54 -05:00 committed by David S. Miller
parent 61a179657f
commit 1f9127caec
2 changed files with 50 additions and 0 deletions
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35
drivers/net/phy/phy.c
View File

@ -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

15
include/linux/phy.h
View File

@ -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