[PATCH v5 3/4] net: phy: Create phy_supported_speeds function which lists speeds currently supported by a phydevice
From: Zach Brown <hidden>
Date: 2016-10-17 15:50:45
Also in:
linux-leds, lkml
Subsystem:
ethernet phy library, networking drivers, the rest · Maintainers:
Andrew Lunn, Heiner Kallweit, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
phy_supported_speeds provides a means to get a list of all the speeds a phy device currently supports. Signed-off-by: Zach Brown <redacted> --- drivers/net/phy/phy.c | 35 +++++++++++++++++++++++++++++++++++ include/linux/phy.h | 15 +++++++++++++++ 2 files changed, 50 insertions(+)
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index f5721db..82ee233 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c@@ -261,6 +261,41 @@ static inline unsigned int phy_find_valid(unsigned int idx, u32 features) } /** + * 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 * @speed: speed to match
diff --git a/include/linux/phy.h b/include/linux/phy.h
index e25f183..8761f30 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h@@ -85,6 +85,21 @@ typedef enum { } 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 * device driver can get phy interface from device tree.
--
2.7.4