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net: phy: micrel: center FLP burst timing at 16ms 

Like [1], reset the FLP burst timing for the KSZ9031 to the 16ms
specified by the IEEE802.3 standard from the chip's default of 8ms.

For more details, see the "Auto-Negotiation Timing" section of the
KSZ9031RNX datasheet.

[1] https://patchwork.kernel.org/patch/6558371/

Signed-off-by: Ash Charles <ash.charles@savoirfairelinux.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Ash Charles 2016-10-21 17:31:33 -04:00 committed by Joe Hershberger
parent 21622452f2
commit f018545ef7
2 changed files with 26 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/net/phy/micrel.c
View File

@ -415,11 +415,31 @@ static int ksz9031_of_config(struct phy_device *phydev)
return 0; return 0;
} }
static int ksz9031_center_flp_timing(struct phy_device *phydev)
{
struct phy_driver *drv = phydev->drv;
int ret = 0;
if (!drv || !drv->writeext)
return -EOPNOTSUPP;
ret = drv->writeext(phydev, 0, 0, MII_KSZ9031_FLP_BURST_TX_LO, 0x1A80);
if (ret)
return ret;
ret = drv->writeext(phydev, 0, 0, MII_KSZ9031_FLP_BURST_TX_HI, 0x6);
return ret;
}
#else #else
static int ksz9031_of_config(struct phy_device *phydev) static int ksz9031_of_config(struct phy_device *phydev)
{ {
return 0; return 0;
} }
static int ksz9031_center_flp_timing(struct phy_device *phydev)
{
return 0;
}
#endif #endif
/* Accessors to extended registers*/ /* Accessors to extended registers*/
@ -470,6 +490,9 @@ static int ksz9031_config(struct phy_device *phydev)
{ {
int ret; int ret;
ret = ksz9031_of_config(phydev); ret = ksz9031_of_config(phydev);
if (ret)
return ret;
ret = ksz9031_center_flp_timing(phydev);
if (ret) if (ret)
return ret; return ret;
return genphy_config(phydev); return genphy_config(phydev);

3
include/micrel.h
View File

@ -20,6 +20,9 @@
#define MII_KSZ9031_EXT_RGMII_TX_DATA_SKEW 0x6 #define MII_KSZ9031_EXT_RGMII_TX_DATA_SKEW 0x6
#define MII_KSZ9031_EXT_RGMII_CLOCK_SKEW 0x8 #define MII_KSZ9031_EXT_RGMII_CLOCK_SKEW 0x8
#define MII_KSZ9031_FLP_BURST_TX_LO 0x3
#define MII_KSZ9031_FLP_BURST_TX_HI 0x4
/* Registers */ /* Registers */
#define MMD_ACCESS_CONTROL 0xd #define MMD_ACCESS_CONTROL 0xd
#define MMD_ACCESS_REG_DATA 0xe #define MMD_ACCESS_REG_DATA 0xe