Re: [RFC PATCH net-next 03/22] net: dsa: mt7530: properly support MT7531AE and MT7531BE
From: Arınç ÜNAL
Date: Fri Apr 21 2023 - 14:30:14 EST
On 21.04.2023 18:22, Daniel Golle wrote:
On Fri, Apr 21, 2023 at 05:36:29PM +0300, arinc9.unal@xxxxxxxxx wrote:
From: Arınç ÜNAL <arinc.unal@xxxxxxxxxx>
Introduce the p5_sgmii pointer to store the information for whether port 5
has got SGMII or not. Print "found MT7531AE" if it's got it, print "found
MT7531BE" if it hasn't.
Move the comment about MT7531AE and MT7531BE to mt7531_setup(), where the
switch is identified.
Get rid of mt7531_dual_sgmii_supported() now that priv->p5_sgmii stores the
information. Address the code where mt7531_dual_sgmii_supported() is used.
Get rid of mt7531_is_rgmii_port() which just prints the opposite of
priv->p5_sgmii.
Remove P5_INTF_SEL_GMAC5_SGMII. The p5_interface_select enum is supposed to
represent the mode that port 5 is used in, not the hardware information of
port 5. Set p5_intf_sel to P5_INTF_SEL_GMAC5 instead, if port 5 is not
dsa_is_unused_port().
Signed-off-by: Arınç ÜNAL <arinc.unal@xxxxxxxxxx>
---
drivers/net/dsa/mt7530-mdio.c | 7 ++---
drivers/net/dsa/mt7530.c | 49 +++++++++++++++--------------------
drivers/net/dsa/mt7530.h | 6 +++--
3 files changed, 27 insertions(+), 35 deletions(-)
diff --git a/drivers/net/dsa/mt7530-mdio.c b/drivers/net/dsa/mt7530-mdio.c
index 088533663b83..fa3ee85a99c1 100644
--- a/drivers/net/dsa/mt7530-mdio.c
+++ b/drivers/net/dsa/mt7530-mdio.c
@@ -81,17 +81,14 @@ static const struct regmap_bus mt7530_regmap_bus = {
};
static int
-mt7531_create_sgmii(struct mt7530_priv *priv, bool dual_sgmii)
+mt7531_create_sgmii(struct mt7530_priv *priv)
{
struct regmap_config *mt7531_pcs_config[2] = {};
struct phylink_pcs *pcs;
struct regmap *regmap;
int i, ret = 0;
- /* MT7531AE has two SGMII units for port 5 and port 6
- * MT7531BE has only one SGMII unit for port 6
- */
- for (i = dual_sgmii ? 0 : 1; i < 2; i++) {
+ for (i = priv->p5_sgmii ? 0 : 1; i < 2; i++) {
mt7531_pcs_config[i] = devm_kzalloc(priv->dev,
sizeof(struct regmap_config),
GFP_KERNEL);
diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index c680873819b0..edc34be745b2 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -473,15 +473,6 @@ mt7530_pad_clk_setup(struct dsa_switch *ds, phy_interface_t interface)
return 0;
}
-static bool mt7531_dual_sgmii_supported(struct mt7530_priv *priv)
-{
- u32 val;
-
- val = mt7530_read(priv, MT7531_TOP_SIG_SR);
-
- return (val & PAD_DUAL_SGMII_EN) != 0;
-}
-
static int
mt7531_pad_setup(struct dsa_switch *ds, phy_interface_t interface)
{
@@ -496,7 +487,7 @@ mt7531_pll_setup(struct mt7530_priv *priv)
u32 xtal;
u32 val;
- if (mt7531_dual_sgmii_supported(priv))
+ if (priv->p5_sgmii)
return;
val = mt7530_read(priv, MT7531_CREV);
@@ -907,8 +898,6 @@ static const char *p5_intf_modes(unsigned int p5_interface)
return "PHY P4";
case P5_INTF_SEL_GMAC5:
return "GMAC5";
- case P5_INTF_SEL_GMAC5_SGMII:
- return "GMAC5_SGMII";
default:
return "unknown";
}
@@ -2440,6 +2429,18 @@ mt7531_setup(struct dsa_switch *ds)
return -ENODEV;
}
+ /* MT7531AE has got two SGMII units. One for port 5, one for port 6.
+ * MT7531BE has got only one SGMII unit which is for port 6.
+ */
+ val = mt7530_read(priv, MT7531_TOP_SIG_SR);
+
+ if ((val & PAD_DUAL_SGMII_EN) != 0) {
+ priv->p5_sgmii = true;
+ dev_info(priv->dev, "found MT7531AE\n");
+ } else {
+ dev_info(priv->dev, "found MT7531BE\n");
I don't think dev_info is useful here for regular users.
If you really want this output, use dev_dbg to reduce log pollution.
Imho completely removing the else branch and only silently
setting priv->p5_sgmii is sufficient, as users can also turn on
dyndbg for drivers/net/pcs/pcs-mtk-lynxi.c and will then be informed
about the created SGMII/1000Base-X/2500Base-X PCS instances.
Sounds good, I'll drop it.
Arınç