| Message ID | ZDSlm-0gyyDZXy_k@makrotopia.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [net-next] net: dsa: mt7530: fix support for MT7531BE | expand |
On 4/10/2023 5:11 PM, Daniel Golle wrote: > There are two variants of the MT7531 switch IC which got different > features (and pins) regarding port 5: > * MT7531AE: SGMII/1000Base-X/2500Base-X SerDes > * MT7531BE: RGMII > > Moving the creation of the SerDes PCS from mt753x_setup to mt7530_probe > with commit 6de285229773 ("net: dsa: mt7530: move SGMII PCS creation to > mt7530_probe function") works fine for MT7531AE which got two instances > of mtk-pcs-lynxi, however, MT7531BE requires mt7531_pll_setup to setup > clocks before the single PCS on port 6 (usually used as CPU port) > starts to work and hence the PCS creation failed on MT7531BE. > > Fix this by introducing a pointer to mt7531_create_sgmii function in > struct mt7530_priv and call it again at the end of mt753x_setup like it > was before commit 6de285229773 ("net: dsa: mt7530: move SGMII PCS > creation to mt7530_probe function"). > > Fixes: 6de285229773 ("net: dsa: mt7530: move SGMII PCS creation to mt7530_probe function") > Signed-off-by: Daniel Golle <daniel@makrotopia.org> > --- > drivers/net/dsa/mt7530-mdio.c | 14 +++++++------- > drivers/net/dsa/mt7530.c | 6 ++++++ > drivers/net/dsa/mt7530.h | 4 ++++ > 3 files changed, 17 insertions(+), 7 deletions(-) > > diff --git a/drivers/net/dsa/mt7530-mdio.c b/drivers/net/dsa/mt7530-mdio.c > index 34a547b88e497..f17eab67d15fa 100644 > --- a/drivers/net/dsa/mt7530-mdio.c > +++ b/drivers/net/dsa/mt7530-mdio.c > @@ -81,14 +81,17 @@ static const struct regmap_bus mt7530_regmap_bus = { > }; > > static int > -mt7531_create_sgmii(struct mt7530_priv *priv) > +mt7531_create_sgmii(struct mt7530_priv *priv, bool dual_sgmii) > { > struct regmap_config *mt7531_pcs_config[2]; [1] use = {}; > struct phylink_pcs *pcs; > struct regmap *regmap; > int i, ret = 0; > > - for (i = 0; i < 2; i++) { > + /* 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++) { > mt7531_pcs_config[i] = devm_kzalloc(priv->dev, hm, I don't like this, you're no longer initializing array[0] if dual_sgmii is set. This seems like a recipe for disaster. you could initialize the array to NULL above when allocating this on the stack? [1] > sizeof(struct regmap_config), > GFP_KERNEL); > @@ -208,11 +211,8 @@ mt7530_probe(struct mdio_device *mdiodev) > if (IS_ERR(priv->regmap)) > return PTR_ERR(priv->regmap); > > - if (priv->id == ID_MT7531) { > - ret = mt7531_create_sgmii(priv); > - if (ret) > - return ret; > - } > + if (priv->id == ID_MT7531) > + priv->create_sgmii = mt7531_create_sgmii; > > return dsa_register_switch(priv->ds); > } > diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c > index e4bb5037d3525..c680873819b01 100644 > --- a/drivers/net/dsa/mt7530.c > +++ b/drivers/net/dsa/mt7530.c > @@ -3018,6 +3018,12 @@ mt753x_setup(struct dsa_switch *ds) > if (ret && priv->irq) > mt7530_free_irq_common(priv); > > + if (priv->create_sgmii) { > + ret = priv->create_sgmii(priv, mt7531_dual_sgmii_supported(priv)); > + if (ret && priv->irq) > + mt7530_free_irq(priv); > + } > + > return ret; > } > > diff --git a/drivers/net/dsa/mt7530.h b/drivers/net/dsa/mt7530.h > index 01db5c9724fa8..6e89578b4de02 100644 > --- a/drivers/net/dsa/mt7530.h > +++ b/drivers/net/dsa/mt7530.h > @@ -752,6 +752,8 @@ struct mt753x_info { > * @irq: IRQ number of the switch > * @irq_domain: IRQ domain of the switch irq_chip > * @irq_enable: IRQ enable bits, synced to SYS_INT_EN > + * no extra blank line needed here. > + * @create_sgmii: Pointer to function creating SGMII PCS instance(s) > */ > struct mt7530_priv { > struct device *dev; > @@ -778,6 +780,8 @@ struct mt7530_priv { > int irq; > struct irq_domain *irq_domain; > u32 irq_enable; > + > + int (*create_sgmii)(struct mt7530_priv *priv, bool dual_sgmii); > }; > > struct mt7530_hw_vlan_entry {
On 11.04.2023 03:11, Daniel Golle wrote: > There are two variants of the MT7531 switch IC which got different > features (and pins) regarding port 5: > * MT7531AE: SGMII/1000Base-X/2500Base-X SerDes > * MT7531BE: RGMII > > Moving the creation of the SerDes PCS from mt753x_setup to mt7530_probe > with commit 6de285229773 ("net: dsa: mt7530: move SGMII PCS creation to > mt7530_probe function") works fine for MT7531AE which got two instances > of mtk-pcs-lynxi, however, MT7531BE requires mt7531_pll_setup to setup > clocks before the single PCS on port 6 (usually used as CPU port) > starts to work and hence the PCS creation failed on MT7531BE. > > Fix this by introducing a pointer to mt7531_create_sgmii function in > struct mt7530_priv and call it again at the end of mt753x_setup like it > was before commit 6de285229773 ("net: dsa: mt7530: move SGMII PCS > creation to mt7530_probe function"). If I understand correctly, this patch does two things. Run mt7531_create_sgmii() from mt753x_setup(), after mt7531_setup() and mt7531_setup_common() is run so that PCS on MT7531BE works. Run the PCS creation code inside the loop only once if mt7531_dual_sgmii_supported() is false so it doesn't set the nonexistent port 5 SGMII on MT7531BE. Regarding the first part: I was actually in the middle of moving the code until after mt7530_pll_setup() and mt7531_pll_setup() on mt7530_setup() and mt7531_setup() to mt7530_probe(). To me it makes more sense to run them on mt7530_probe() as there's a good amount of duplicate code on mt7530_setup() and mt7531_setup(). This will resolve the problem here, and make my future work regarding the PHY muxing feature on the MT7530 switch possible to do. Regarding the second part: I'll take your changes to my current RFC patch series while addressing Jesse's suggestion if this is fine by you. Arınç
On Tue, Apr 11, 2023 at 10:30:06PM +0300, Arınç ÜNAL wrote: > On 11.04.2023 03:11, Daniel Golle wrote: > > There are two variants of the MT7531 switch IC which got different > > features (and pins) regarding port 5: > > * MT7531AE: SGMII/1000Base-X/2500Base-X SerDes > > * MT7531BE: RGMII > > > > Moving the creation of the SerDes PCS from mt753x_setup to mt7530_probe > > with commit 6de285229773 ("net: dsa: mt7530: move SGMII PCS creation to > > mt7530_probe function") works fine for MT7531AE which got two instances > > of mtk-pcs-lynxi, however, MT7531BE requires mt7531_pll_setup to setup > > clocks before the single PCS on port 6 (usually used as CPU port) > > starts to work and hence the PCS creation failed on MT7531BE. > > > > Fix this by introducing a pointer to mt7531_create_sgmii function in > > struct mt7530_priv and call it again at the end of mt753x_setup like it > > was before commit 6de285229773 ("net: dsa: mt7530: move SGMII PCS > > creation to mt7530_probe function"). > > If I understand correctly, this patch does two things. > > Run mt7531_create_sgmii() from mt753x_setup(), after mt7531_setup() and > mt7531_setup_common() is run so that PCS on MT7531BE works. > > Run the PCS creation code inside the loop only once if > mt7531_dual_sgmii_supported() is false so it doesn't set the nonexistent > port 5 SGMII on MT7531BE. Yes, both is correct. > > Regarding the first part: > I was actually in the middle of moving the code until after > mt7530_pll_setup() and mt7531_pll_setup() on mt7530_setup() and > mt7531_setup() to mt7530_probe(). To me it makes more sense to run them on > mt7530_probe() as there's a good amount of duplicate code on mt7530_setup() > and mt7531_setup(). I thought about doing that as well, however, note that you will have to move all the reset and regulator setup procedure to mt7530_probe() as well then, as PLL setup currently happens after that, and that's probably for a reason. As the reset and regulator setup works differently on MT7530 and MT7531, and depending on whether it's a standalone IC package or MCM, I believe changes unifying this will have to be tested on a lot of boards... > > This will resolve the problem here, and make my future work regarding the > PHY muxing feature on the MT7530 switch possible to do. > > Regarding the second part: > I'll take your changes to my current RFC patch series while addressing > Jesse's suggestion if this is fine by you. Yes, I'd appreciate that and I'm ready to test and review once you post your updated series.
On 11.04.2023 22:43, Daniel Golle wrote: > On Tue, Apr 11, 2023 at 10:30:06PM +0300, Arınç ÜNAL wrote: >> On 11.04.2023 03:11, Daniel Golle wrote: >>> There are two variants of the MT7531 switch IC which got different >>> features (and pins) regarding port 5: >>> * MT7531AE: SGMII/1000Base-X/2500Base-X SerDes >>> * MT7531BE: RGMII >>> >>> Moving the creation of the SerDes PCS from mt753x_setup to mt7530_probe >>> with commit 6de285229773 ("net: dsa: mt7530: move SGMII PCS creation to >>> mt7530_probe function") works fine for MT7531AE which got two instances >>> of mtk-pcs-lynxi, however, MT7531BE requires mt7531_pll_setup to setup >>> clocks before the single PCS on port 6 (usually used as CPU port) >>> starts to work and hence the PCS creation failed on MT7531BE. >>> >>> Fix this by introducing a pointer to mt7531_create_sgmii function in >>> struct mt7530_priv and call it again at the end of mt753x_setup like it >>> was before commit 6de285229773 ("net: dsa: mt7530: move SGMII PCS >>> creation to mt7530_probe function"). >> >> If I understand correctly, this patch does two things. >> >> Run mt7531_create_sgmii() from mt753x_setup(), after mt7531_setup() and >> mt7531_setup_common() is run so that PCS on MT7531BE works. > >> >> Run the PCS creation code inside the loop only once if >> mt7531_dual_sgmii_supported() is false so it doesn't set the nonexistent >> port 5 SGMII on MT7531BE. > > Yes, both is correct. > >> >> Regarding the first part: >> I was actually in the middle of moving the code until after >> mt7530_pll_setup() and mt7531_pll_setup() on mt7530_setup() and >> mt7531_setup() to mt7530_probe(). To me it makes more sense to run them on >> mt7530_probe() as there's a good amount of duplicate code on mt7530_setup() >> and mt7531_setup(). > > I thought about doing that as well, however, note that you will have to > move all the reset and regulator setup procedure to mt7530_probe() as > well then, as PLL setup currently happens after that, and that's > probably for a reason. > > As the reset and regulator setup works differently on MT7530 and > MT7531, and depending on whether it's a standalone IC package or MCM, I > believe changes unifying this will have to be tested on a lot of > boards... Not if we don't change the behaviour at all for both switches, which is what I intend to do. > >> >> This will resolve the problem here, and make my future work regarding the >> PHY muxing feature on the MT7530 switch possible to do. >> >> Regarding the second part: >> I'll take your changes to my current RFC patch series while addressing >> Jesse's suggestion if this is fine by you. > > Yes, I'd appreciate that and I'm ready to test and review once you post > your updated series. Sounds good, cheers. Arınç
diff --git a/drivers/net/dsa/mt7530-mdio.c b/drivers/net/dsa/mt7530-mdio.c index 34a547b88e497..f17eab67d15fa 100644 --- a/drivers/net/dsa/mt7530-mdio.c +++ b/drivers/net/dsa/mt7530-mdio.c @@ -81,14 +81,17 @@ static const struct regmap_bus mt7530_regmap_bus = { }; static int -mt7531_create_sgmii(struct mt7530_priv *priv) +mt7531_create_sgmii(struct mt7530_priv *priv, bool dual_sgmii) { struct regmap_config *mt7531_pcs_config[2]; struct phylink_pcs *pcs; struct regmap *regmap; int i, ret = 0; - for (i = 0; i < 2; i++) { + /* 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++) { mt7531_pcs_config[i] = devm_kzalloc(priv->dev, sizeof(struct regmap_config), GFP_KERNEL); @@ -208,11 +211,8 @@ mt7530_probe(struct mdio_device *mdiodev) if (IS_ERR(priv->regmap)) return PTR_ERR(priv->regmap); - if (priv->id == ID_MT7531) { - ret = mt7531_create_sgmii(priv); - if (ret) - return ret; - } + if (priv->id == ID_MT7531) + priv->create_sgmii = mt7531_create_sgmii; return dsa_register_switch(priv->ds); } diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c index e4bb5037d3525..c680873819b01 100644 --- a/drivers/net/dsa/mt7530.c +++ b/drivers/net/dsa/mt7530.c @@ -3018,6 +3018,12 @@ mt753x_setup(struct dsa_switch *ds) if (ret && priv->irq) mt7530_free_irq_common(priv); + if (priv->create_sgmii) { + ret = priv->create_sgmii(priv, mt7531_dual_sgmii_supported(priv)); + if (ret && priv->irq) + mt7530_free_irq(priv); + } + return ret; } diff --git a/drivers/net/dsa/mt7530.h b/drivers/net/dsa/mt7530.h index 01db5c9724fa8..6e89578b4de02 100644 --- a/drivers/net/dsa/mt7530.h +++ b/drivers/net/dsa/mt7530.h @@ -752,6 +752,8 @@ struct mt753x_info { * @irq: IRQ number of the switch * @irq_domain: IRQ domain of the switch irq_chip * @irq_enable: IRQ enable bits, synced to SYS_INT_EN + * + * @create_sgmii: Pointer to function creating SGMII PCS instance(s) */ struct mt7530_priv { struct device *dev; @@ -778,6 +780,8 @@ struct mt7530_priv { int irq; struct irq_domain *irq_domain; u32 irq_enable; + + int (*create_sgmii)(struct mt7530_priv *priv, bool dual_sgmii); }; struct mt7530_hw_vlan_entry {
There are two variants of the MT7531 switch IC which got different features (and pins) regarding port 5: * MT7531AE: SGMII/1000Base-X/2500Base-X SerDes * MT7531BE: RGMII Moving the creation of the SerDes PCS from mt753x_setup to mt7530_probe with commit 6de285229773 ("net: dsa: mt7530: move SGMII PCS creation to mt7530_probe function") works fine for MT7531AE which got two instances of mtk-pcs-lynxi, however, MT7531BE requires mt7531_pll_setup to setup clocks before the single PCS on port 6 (usually used as CPU port) starts to work and hence the PCS creation failed on MT7531BE. Fix this by introducing a pointer to mt7531_create_sgmii function in struct mt7530_priv and call it again at the end of mt753x_setup like it was before commit 6de285229773 ("net: dsa: mt7530: move SGMII PCS creation to mt7530_probe function"). Fixes: 6de285229773 ("net: dsa: mt7530: move SGMII PCS creation to mt7530_probe function") Signed-off-by: Daniel Golle <daniel@makrotopia.org> --- drivers/net/dsa/mt7530-mdio.c | 14 +++++++------- drivers/net/dsa/mt7530.c | 6 ++++++ drivers/net/dsa/mt7530.h | 4 ++++ 3 files changed, 17 insertions(+), 7 deletions(-)