xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: phy: add I2C mdio bus

Browse Source 
Add an I2C MDIO bus bridge library, to allow phylib to access PHYs which
are connected to an I2C bus instead of the more conventional MDIO bus.
Such PHYs can be found in SFP adapters and SFF modules.

Since PHYs appear at I2C bus address 0x40..0x5f, and 0x50/0x51 are
reserved for SFP EEPROMs/diagnostics, we must not allow the MDIO bus
to access these I2C addresses.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Russell King
2017-07-25 15:03:08 +01:00
committed by David S. Miller
parent 5e5758d9d8
commit 453d00defb
4 changed files with 139 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/net/phy/Kconfig
View File

@@ -106,6 +106,16 @@ config MDIO_HISI_FEMAC
This module provides a driver for the MDIO busses found in the
Hisilicon SoC that have an Fast Ethernet MAC.
config MDIO_I2C
tristate
depends on I2C
help
Support I2C based PHYs. This provides a MDIO bus bridged
to I2C to allow PHYs connected in I2C mode to be accessed
using the existing infrastructure.
This is library mode.
config MDIO_MOXART
tristate "MOXA ART MDIO interface support"
depends on ARCH_MOXART