Re: [PATCH net-next 1/2] net: phy: broadcom: Set proper 1000BaseX/SGMII interface mode for BCM54616S
From: Florian Fainelli <f.fainelli@gmail.com>
Date: 2021-02-13 01:26:48
On 2/12/2021 4:28 PM, 'Robert Hancock' via BCM-KERNEL-FEEDBACK-LIST,PDL wrote:
quoted hunk ↗ jump to hunk
The default configuration for the BCM54616S PHY may not match the desired mode when using 1000BaseX or SGMII interface modes, such as when it is on an SFP module. Add code to explicitly set the correct mode using programming sequences provided by Bel-Fuse: https://www.belfuse.com/resources/datasheets/powersolutions/ds-bps-sfp-1gbt-05-series.pdf https://www.belfuse.com/resources/datasheets/powersolutions/ds-bps-sfp-1gbt-06-series.pdf Signed-off-by: Robert Hancock <redacted> --- drivers/net/phy/broadcom.c | 83 ++++++++++++++++++++++++++++++++------ include/linux/brcmphy.h | 4 ++ 2 files changed, 75 insertions(+), 12 deletions(-)diff --git a/drivers/net/phy/broadcom.c b/drivers/net/phy/broadcom.c index 0472b3470c59..78542580f2b2 100644 --- a/drivers/net/phy/broadcom.c +++ b/drivers/net/phy/broadcom.c@@ -64,6 +64,63 @@ static int bcm54612e_config_init(struct phy_device *phydev) return 0; } +static int bcm54616s_config_init(struct phy_device *phydev) +{ + int rc, val; + + if (phydev->interface == PHY_INTERFACE_MODE_SGMII || + phydev->interface == PHY_INTERFACE_MODE_1000BASEX) {
Can you reverse the condition so as to save a level of identation?
+ /* Ensure proper interface mode is selected. */ + /* Disable RGMII mode */ + val = bcm54xx_auxctl_read(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_MISC); + if (val < 0) + return val; + val &= ~MII_BCM54XX_AUXCTL_SHDWSEL_MISC_RGMII_EN; + rc = bcm54xx_auxctl_write(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_MISC, + val); + if (rc < 0) + return rc;
I don't think this write is making it through since you are not setting MII_BCM54XX_AUXCTL_MISC_WREN in val, I know this is an annoying detail, and we could probably fold that to be within bcm54xx_auxctl_write() directly, similarly to what bcm_phy_write_shadow() does. The reset of the sequence and changes looks fine to me. -- Florian