[PATCH net-next v8 00/15] Add support for Synopsis DWMAC IP on NXP Automotive SoCs S32G2xx/S32G3xx/S32R45

[PATCH net-next v8 00/15] Add support for Synopsis DWMAC IP on NXP Automotive SoCs S32G2xx/S32G3xx/S32R45

[Jan Petrous via B4 Relay]

The SoC series S32G2xx and S32G3xx feature one DWMAC instance,
the SoC S32R45 has two instances. The devices can use RGMII/RMII/MII
interface over Pinctrl device or the output can be routed
to the embedded SerDes for SGMII connectivity.

The provided stmmac glue code implements only basic functionality,
interface support is restricted to RGMII only. More, including
SGMII/SerDes support will come later.

This patchset adds stmmac glue driver based on downstream NXP git [0].

[0] https://github.com/nxp-auto-linux/linux

v8:
- dropped 'driver' in patch subject
- fixed interface rx/tx clock init
- Link to v7: https://lore.kernel.org/r/20241202-upstream_s32cc_gmac-v7-0-bc3e1f9f656e@oss.nxp.com

v7:
- rebased on v6.13-rc1 and removed RFC prefix
- Link to v6: https://lore.kernel.org/r/20241124-upstream_s32cc_gmac-v6-0-dc5718ccf001@oss.nxp.com

v6:
- removed dead code in dwmac-intel-plat.c
- yaml: fix indention
- validate interface mode in probe
- dropped patch#16 to fit in max 15 patches in series
- Link to v5: https://lore.kernel.org/r/20241119-upstream_s32cc_gmac-v5-0-7dcc90fcffef@oss.nxp.com

v5:
- yaml: refactored compatible string to use fallback
- yaml: fix indention in example
- fix xmas tree formating in local variable declarations
- removed lazy rx clk setup
- drop PTP clock reading patch and replace it with stmmac_platform fix
- Link to v4: https://lore.kernel.org/r/20241028-upstream_s32cc_gmac-v4-0-03618f10e3e2@oss.nxp.com

v4:
- fixed empty commit messages for rgmi_clock() helper patches
- fixed yaml path in MAINTAINERS
- switched to platform_driver::remove() as suggested Uwe
- yaml: returned back all compatibility sting values
- added better commit description for rgmii_clock() helper
- Link to v3: https://lore.kernel.org/r/20241013-upstream_s32cc_gmac-v3-0-d84b5a67b930@oss.nxp.com

v3:
- switched to b4 WoW to overcome threading issue with b4
- extracted the hunk with the typo fix from v2 patch#1 to separate patch
  as Jacob suggested
- removed dead code for RMII/MII support, which will be added alter
- used new rgmii_clock() helper in other stmmac:dwmac glue drivers
- yaml: compatible strings compressed to simple one "nxp,s32-dwmac",
  removed duplicated required properties, already defined in snps,dwmac,
  fixed example

v2:
- send to wider audience as first version missed many maintainers
- created rgmi_clk() helper as Russell suggested (see patch#4)
- address Andrew's, Russell's, Serge's and Simon's comments

Message-ID: <AM9PR04MB85066576AD6848E2402DA354E2832@AM9PR04MB8506.eurprd04.prod.outlook.com>

Cc: 

Cc:

---
To: Maxime Coquelin <mcoquelin.stm32@gmail.com>
To: Alexandre Torgue <alexandre.torgue@foss.st.com>
To: Jose Abreu <joabreu@synopsys.com>
To: David S. Miller <davem@davemloft.net>
To: Eric Dumazet <edumazet@google.com>
To: Jakub Kicinski <kuba@kernel.org>
To: Paolo Abeni <pabeni@redhat.com>
To: Vinod Koul <vkoul@kernel.org>
To: Richard Cochran <richardcochran@gmail.com>
To: Andrew Lunn <andrew@lunn.ch>
To: Heiner Kallweit <hkallweit1@gmail.com>
To: Russell King <linux@armlinux.org.uk>
To: Shawn Guo <shawnguo@kernel.org>
To: Sascha Hauer <s.hauer@pengutronix.de>
To: Pengutronix Kernel Team <kernel@pengutronix.de>
To: Fabio Estevam <festevam@gmail.com>
To: Emil Renner Berthing <kernel@esmil.dk>
To: Minda Chen <minda.chen@starfivetech.com>
To: Nicolas Ferre <nicolas.ferre@microchip.com>
To: Claudiu Beznea <claudiu.beznea@tuxon.dev>
To: Iyappan Subramanian <iyappan@os.amperecomputing.com>
To: Keyur Chudgar <keyur@os.amperecomputing.com>
To: Quan Nguyen <quan@os.amperecomputing.com>
To: Rob Herring <robh@kernel.org>
To: Krzysztof Kozlowski <krzk+dt@kernel.org>
To: Conor Dooley <conor+dt@kernel.org>
To: Giuseppe Cavallaro <peppe.cavallaro@st.com>
To: Andrew Lunn <andrew+netdev@lunn.ch>
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: linux-arm-msm@vger.kernel.org
Cc: imx@lists.linux.dev
Cc: devicetree@vger.kernel.org
Cc: NXP S32 Linux Team <s32@nxp.com>
Cc: 0x1207@gmail.com
Cc: fancer.lancer@gmail.com
Cc: 
Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>

---
Jan Petrous (OSS) (15):
      net: stmmac: Fix CSR divider comment
      net: stmmac: Extend CSR calc support
      net: stmmac: Fix clock rate variables size
      net: phy: Add helper for mapping RGMII link speed to clock rate
      net: dwmac-dwc-qos-eth: Use helper rgmii_clock
      net: dwmac-imx: Use helper rgmii_clock
      net: dwmac-intel-plat: Use helper rgmii_clock
      net: dwmac-rk: Use helper rgmii_clock
      net: dwmac-starfive: Use helper rgmii_clock
      net: macb: Use helper rgmii_clock
      net: xgene_enet: Use helper rgmii_clock
      net: dwmac-sti: Use helper rgmii_clock
      dt-bindings: net: Add DT bindings for DWMAC on NXP S32G/R SoCs
      net: stmmac: dwmac-s32: add basic NXP S32G/S32R glue driver
      MAINTAINERS: Add Jan Petrous as the NXP S32G/R DWMAC driver maintainer

 .../devicetree/bindings/net/nxp,s32-dwmac.yaml     | 105 +++++++++++
 .../devicetree/bindings/net/snps,dwmac.yaml        |   1 +
 MAINTAINERS                                        |   7 +
 drivers/net/ethernet/apm/xgene/xgene_enet_hw.c     |  16 +-
 drivers/net/ethernet/cadence/macb_main.c           |  14 +-
 drivers/net/ethernet/stmicro/stmmac/Kconfig        |  12 ++
 drivers/net/ethernet/stmicro/stmmac/Makefile       |   1 +
 drivers/net/ethernet/stmicro/stmmac/common.h       |   2 +
 .../ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c    |  11 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c    |  15 +-
 .../net/ethernet/stmicro/stmmac/dwmac-intel-plat.c |  22 +--
 .../ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c    |   2 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c     |  30 +--
 drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c    | 202 +++++++++++++++++++++
 .../net/ethernet/stmicro/stmmac/dwmac-starfive.c   |  19 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac-sti.c    |  18 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c  |   2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |   6 +-
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |   2 +-
 include/linux/phy.h                                |  23 +++
 include/linux/stmmac.h                             |  10 +-
 21 files changed, 399 insertions(+), 121 deletions(-)
---
base-commit: 40384c840ea1944d7c5a392e8975ed088ecf0b37
change-id: 20240923-upstream_s32cc_gmac-6891eb75b126

Best regards,
-- 
Jan Petrous (OSS) <jan.petrous@oss.nxp.com>

[PATCH net-next v8 01/15] net: stmmac: Fix CSR divider comment

[Jan Petrous via B4 Relay]

From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>

The comment in declaration of STMMAC_CSR_250_300M
incorrectly describes the constant as '/* MDC = clk_scr_i/122 */'
but the DWC Ether QOS Handbook version 5.20a says it is
CSR clock/124.

Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
---
 include/linux/stmmac.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index d79ff252cfdc..75cbfb576358 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -33,7 +33,7 @@
 #define	STMMAC_CSR_20_35M	0x2	/* MDC = clk_scr_i/16 */
 #define	STMMAC_CSR_35_60M	0x3	/* MDC = clk_scr_i/26 */
 #define	STMMAC_CSR_150_250M	0x4	/* MDC = clk_scr_i/102 */
-#define	STMMAC_CSR_250_300M	0x5	/* MDC = clk_scr_i/122 */
+#define	STMMAC_CSR_250_300M	0x5	/* MDC = clk_scr_i/124 */
 
 /* MTL algorithms identifiers */
 #define MTL_TX_ALGORITHM_WRR	0x0

-- 
2.47.0

Re: [PATCH net-next v8 01/15] net: stmmac: Fix CSR divider comment

[Russell King (Oracle)]

On Thu, Dec 05, 2024 at 05:42:58PM +0100, Jan Petrous via B4 Relay wrote:
> From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>
> 
> The comment in declaration of STMMAC_CSR_250_300M
> incorrectly describes the constant as '/* MDC = clk_scr_i/122 */'
> but the DWC Ether QOS Handbook version 5.20a says it is
> CSR clock/124.
> 
> Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
> Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>

I gave my reviewed-by for this patch in the previous posting, but you
haven't included it.

Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

Re: [PATCH net-next v8 01/15] net: stmmac: Fix CSR divider comment

[Jan Petrous]

On Thu, Dec 05, 2024 at 04:51:19PM +0000, Russell King (Oracle) wrote:
> On Thu, Dec 05, 2024 at 05:42:58PM +0100, Jan Petrous via B4 Relay wrote:
> > From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>
> > 
> > The comment in declaration of STMMAC_CSR_250_300M
> > incorrectly describes the constant as '/* MDC = clk_scr_i/122 */'
> > but the DWC Ether QOS Handbook version 5.20a says it is
> > CSR clock/124.
> > 
> > Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
> > Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
> 
> I gave my reviewed-by for this patch in the previous posting, but you
> haven't included it.
> 
> Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

Hi Russell,
sorry for that, I missed it. Should I resend the v8 series?

BR.
/Jan

Re: [PATCH net-next v8 01/15] net: stmmac: Fix CSR divider comment

[Russell King (Oracle)]

On Thu, Dec 05, 2024 at 05:55:22PM +0100, Jan Petrous wrote:
> On Thu, Dec 05, 2024 at 04:51:19PM +0000, Russell King (Oracle) wrote:
> > On Thu, Dec 05, 2024 at 05:42:58PM +0100, Jan Petrous via B4 Relay wrote:
> > > From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>
> > > 
> > > The comment in declaration of STMMAC_CSR_250_300M
> > > incorrectly describes the constant as '/* MDC = clk_scr_i/122 */'
> > > but the DWC Ether QOS Handbook version 5.20a says it is
> > > CSR clock/124.
> > > 
> > > Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
> > > Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
> > 
> > I gave my reviewed-by for this patch in the previous posting, but you
> > haven't included it.
> > 
> > Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
> 
> Hi Russell,
> sorry for that, I missed it. Should I resend the v8 series?

Patchwork will add it if this series is merged, so there's no immediate
need to resend. However, please update your series with it in case there
is another reason to send another version.

Thanks.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

Re: [PATCH net-next v8 01/15] net: stmmac: Fix CSR divider comment

[Andrew Lunn]

On Thu, Dec 05, 2024 at 05:55:22PM +0100, Jan Petrous wrote:
> On Thu, Dec 05, 2024 at 04:51:19PM +0000, Russell King (Oracle) wrote:
> > On Thu, Dec 05, 2024 at 05:42:58PM +0100, Jan Petrous via B4 Relay wrote:
> > > From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>
> > > 
> > > The comment in declaration of STMMAC_CSR_250_300M
> > > incorrectly describes the constant as '/* MDC = clk_scr_i/122 */'
> > > but the DWC Ether QOS Handbook version 5.20a says it is
> > > CSR clock/124.
> > > 
> > > Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
> > > Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
> > 
> > I gave my reviewed-by for this patch in the previous posting, but you
> > haven't included it.
> > 
> > Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
> 
> Hi Russell,
> sorry for that, I missed it. Should I resend the v8 series?

b4 is pretty good at handling this, it will find such tags and add
them to your patchset if you are using b4 to manage it.

	Andrew

[PATCH net-next v8 02/15] net: stmmac: Extend CSR calc support

[Jan Petrous via B4 Relay]

From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>

Add support for CSR clock range up to 800 MHz.

Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
---
 drivers/net/ethernet/stmicro/stmmac/common.h      | 2 ++
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 4 ++++
 include/linux/stmmac.h                            | 2 ++
 3 files changed, 8 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
index 1367fa5c9b8e..70d601f45481 100644
--- a/drivers/net/ethernet/stmicro/stmmac/common.h
+++ b/drivers/net/ethernet/stmicro/stmmac/common.h
@@ -257,6 +257,8 @@ struct stmmac_safety_stats {
 #define CSR_F_150M	150000000
 #define CSR_F_250M	250000000
 #define CSR_F_300M	300000000
+#define CSR_F_500M	500000000
+#define CSR_F_800M	800000000
 
 #define	MAC_CSR_H_FRQ_MASK	0x20
 
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 9b262cdad60b..3cb7ad6ccc4e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -325,6 +325,10 @@ static void stmmac_clk_csr_set(struct stmmac_priv *priv)
 			priv->clk_csr = STMMAC_CSR_150_250M;
 		else if ((clk_rate >= CSR_F_250M) && (clk_rate <= CSR_F_300M))
 			priv->clk_csr = STMMAC_CSR_250_300M;
+		else if ((clk_rate >= CSR_F_300M) && (clk_rate < CSR_F_500M))
+			priv->clk_csr = STMMAC_CSR_300_500M;
+		else if ((clk_rate >= CSR_F_500M) && (clk_rate < CSR_F_800M))
+			priv->clk_csr = STMMAC_CSR_500_800M;
 	}
 
 	if (priv->plat->flags & STMMAC_FLAG_HAS_SUN8I) {
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index 75cbfb576358..865d0fe26f98 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -34,6 +34,8 @@
 #define	STMMAC_CSR_35_60M	0x3	/* MDC = clk_scr_i/26 */
 #define	STMMAC_CSR_150_250M	0x4	/* MDC = clk_scr_i/102 */
 #define	STMMAC_CSR_250_300M	0x5	/* MDC = clk_scr_i/124 */
+#define	STMMAC_CSR_300_500M	0x6	/* MDC = clk_scr_i/204 */
+#define	STMMAC_CSR_500_800M	0x7	/* MDC = clk_scr_i/324 */
 
 /* MTL algorithms identifiers */
 #define MTL_TX_ALGORITHM_WRR	0x0

-- 
2.47.0

[PATCH net-next v8 03/15] net: stmmac: Fix clock rate variables size

[Jan Petrous via B4 Relay]

From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>

The clock API clk_get_rate() returns unsigned long value.
Expand affected members of stmmac platform data and
convert the stmmac_clk_csr_set() and dwmac4_core_init() methods
to defining the unsigned long clk_rate local variables.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 2 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c       | 2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c       | 2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c   | 2 +-
 include/linux/stmmac.h                                  | 6 +++---
 5 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index 901a3c1959fa..2a5b38723635 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -777,7 +777,7 @@ static void ethqos_ptp_clk_freq_config(struct stmmac_priv *priv)
 		netdev_err(priv->dev, "Failed to max out clk_ptp_ref: %d\n", err);
 	plat_dat->clk_ptp_rate = clk_get_rate(plat_dat->clk_ptp_ref);
 
-	netdev_dbg(priv->dev, "PTP rate %d\n", plat_dat->clk_ptp_rate);
+	netdev_dbg(priv->dev, "PTP rate %lu\n", plat_dat->clk_ptp_rate);
 }
 
 static int qcom_ethqos_probe(struct platform_device *pdev)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
index c25781874aa7..c36f90a782c5 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
@@ -27,7 +27,7 @@ static void dwmac4_core_init(struct mac_device_info *hw,
 	struct stmmac_priv *priv = netdev_priv(dev);
 	void __iomem *ioaddr = hw->pcsr;
 	u32 value = readl(ioaddr + GMAC_CONFIG);
-	u32 clk_rate;
+	unsigned long clk_rate;
 
 	value |= GMAC_CORE_INIT;
 
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 3cb7ad6ccc4e..d45fd7a3acd5 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -301,7 +301,7 @@ static void stmmac_global_err(struct stmmac_priv *priv)
  */
 static void stmmac_clk_csr_set(struct stmmac_priv *priv)
 {
-	u32 clk_rate;
+	unsigned long clk_rate;
 
 	clk_rate = clk_get_rate(priv->plat->stmmac_clk);
 
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 3ac32444e492..06e07e6e180b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -640,7 +640,7 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
 		dev_info(&pdev->dev, "PTP uses main clock\n");
 	} else {
 		plat->clk_ptp_rate = clk_get_rate(plat->clk_ptp_ref);
-		dev_dbg(&pdev->dev, "PTP rate %d\n", plat->clk_ptp_rate);
+		dev_dbg(&pdev->dev, "PTP rate %lu\n", plat->clk_ptp_rate);
 	}
 
 	plat->stmmac_rst = devm_reset_control_get_optional(&pdev->dev,
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index 865d0fe26f98..c9878a612e53 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -252,8 +252,8 @@ struct plat_stmmacenet_data {
 	struct clk *stmmac_clk;
 	struct clk *pclk;
 	struct clk *clk_ptp_ref;
-	unsigned int clk_ptp_rate;
-	unsigned int clk_ref_rate;
+	unsigned long clk_ptp_rate;
+	unsigned long clk_ref_rate;
 	unsigned int mult_fact_100ns;
 	s32 ptp_max_adj;
 	u32 cdc_error_adj;
@@ -265,7 +265,7 @@ struct plat_stmmacenet_data {
 	int mac_port_sel_speed;
 	int has_xgmac;
 	u8 vlan_fail_q;
-	unsigned int eee_usecs_rate;
+	unsigned long eee_usecs_rate;
 	struct pci_dev *pdev;
 	int int_snapshot_num;
 	int msi_mac_vec;

-- 
2.47.0

[PATCH net-next v8 04/15] net: phy: Add helper for mapping RGMII link speed to clock rate

[Jan Petrous via B4 Relay]

From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>

The RGMII interface supports three data rates: 10/100 Mbps
and 1 Gbps. These speeds correspond to clock frequencies
of 2.5/25 MHz and 125 MHz, respectively.

Many Ethernet drivers, including glues in stmmac, follow
a similar pattern of converting RGMII speed to clock frequency.

To simplify code, define the helper rgmii_clock(speed)
to convert connection speed to clock frequency.

Suggested-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
---
 include/linux/phy.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/include/linux/phy.h b/include/linux/phy.h
index 563c46205685..a746f056ed57 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -298,6 +298,29 @@ static inline const char *phy_modes(phy_interface_t interface)
 	}
 }
 
+/**
+ * rgmii_clock - map link speed to the clock rate
+ * @speed: link speed value
+ *
+ * Description: maps RGMII supported link speeds
+ * into the clock rates.
+ *
+ * Returns: clock rate or negative errno
+ */
+static inline long rgmii_clock(int speed)
+{
+	switch (speed) {
+	case SPEED_10:
+		return 2500000;
+	case SPEED_100:
+		return 25000000;
+	case SPEED_1000:
+		return 125000000;
+	default:
+		return -EINVAL;
+	}
+}
+
 #define PHY_INIT_TIMEOUT	100000
 #define PHY_FORCE_TIMEOUT	10
 

-- 
2.47.0

[PATCH net-next v8 05/15] net: dwmac-dwc-qos-eth: Use helper rgmii_clock

[Jan Petrous via B4 Relay]

From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>

Utilize a new helper function rgmii_clock().

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
index 83290e707df5..bd4eb187f8c6 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
@@ -181,24 +181,19 @@ static void dwc_qos_remove(struct platform_device *pdev)
 static void tegra_eqos_fix_speed(void *priv, unsigned int speed, unsigned int mode)
 {
 	struct tegra_eqos *eqos = priv;
-	unsigned long rate = 125000000;
 	bool needs_calibration = false;
+	long rate = 125000000;
 	u32 value;
 	int err;
 
 	switch (speed) {
 	case SPEED_1000:
-		needs_calibration = true;
-		rate = 125000000;
-		break;
-
 	case SPEED_100:
 		needs_calibration = true;
-		rate = 25000000;
-		break;
+		fallthrough;
 
 	case SPEED_10:
-		rate = 2500000;
+		rate = rgmii_clock(speed);
 		break;
 
 	default:

-- 
2.47.0

[PATCH net-next v8 06/15] net: dwmac-imx: Use helper rgmii_clock

[Jan Petrous via B4 Relay]

From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>

Utilize a new helper function rgmii_clock().

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
index 641f3cd019a3..43e0fbba4f77 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
@@ -186,7 +186,7 @@ static void imx_dwmac_fix_speed(void *priv, unsigned int speed, unsigned int mod
 {
 	struct plat_stmmacenet_data *plat_dat;
 	struct imx_priv_data *dwmac = priv;
-	unsigned long rate;
+	long rate;
 	int err;
 
 	plat_dat = dwmac->plat_dat;
@@ -196,17 +196,8 @@ static void imx_dwmac_fix_speed(void *priv, unsigned int speed, unsigned int mod
 	    (plat_dat->mac_interface == PHY_INTERFACE_MODE_MII))
 		return;
 
-	switch (speed) {
-	case SPEED_1000:
-		rate = 125000000;
-		break;
-	case SPEED_100:
-		rate = 25000000;
-		break;
-	case SPEED_10:
-		rate = 2500000;
-		break;
-	default:
+	rate = rgmii_clock(speed);
+	if (rate < 0) {
 		dev_err(dwmac->dev, "invalid speed %u\n", speed);
 		return;
 	}

-- 
2.47.0

[PATCH net-next v8 07/15] net: dwmac-intel-plat: Use helper rgmii_clock

[Jan Petrous via B4 Relay]

From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>

Utilize a new helper function rgmii_clock().

When in, remove dead code in kmb_eth_fix_mac_speed().

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
---
 .../net/ethernet/stmicro/stmmac/dwmac-intel-plat.c | 22 ++++------------------
 1 file changed, 4 insertions(+), 18 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel-plat.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel-plat.c
index d94f0a150e93..ddee6154d40b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel-plat.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel-plat.c
@@ -31,27 +31,13 @@ struct intel_dwmac_data {
 static void kmb_eth_fix_mac_speed(void *priv, unsigned int speed, unsigned int mode)
 {
 	struct intel_dwmac *dwmac = priv;
-	unsigned long rate;
+	long rate;
 	int ret;
 
-	rate = clk_get_rate(dwmac->tx_clk);
-
-	switch (speed) {
-	case SPEED_1000:
-		rate = 125000000;
-		break;
-
-	case SPEED_100:
-		rate = 25000000;
-		break;
-
-	case SPEED_10:
-		rate = 2500000;
-		break;
-
-	default:
+	rate = rgmii_clock(speed);
+	if (rate < 0) {
 		dev_err(dwmac->dev, "Invalid speed\n");
-		break;
+		return;
 	}
 
 	ret = clk_set_rate(dwmac->tx_clk, rate);

-- 
2.47.0

Re: [PATCH net-next v8 07/15] net: dwmac-intel-plat: Use helper rgmii_clock

[Russell King (Oracle)]

On Thu, Dec 05, 2024 at 05:43:04PM +0100, Jan Petrous via B4 Relay wrote:
> From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>
> 
> Utilize a new helper function rgmii_clock().
> 
> When in, remove dead code in kmb_eth_fix_mac_speed().
> 
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
> Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>

Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

Thanks!

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

[PATCH net-next v8 08/15] net: dwmac-rk: Use helper rgmii_clock

[Jan Petrous via B4 Relay]

From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>

Utilize a new helper function rgmii_clock().

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 30 ++++++--------------------
 1 file changed, 6 insertions(+), 24 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index 8cb374668b74..a4dc89e23a68 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -1079,20 +1079,11 @@ static void rk3568_set_gmac_speed(struct rk_priv_data *bsp_priv, int speed)
 {
 	struct clk *clk_mac_speed = bsp_priv->clks[RK_CLK_MAC_SPEED].clk;
 	struct device *dev = &bsp_priv->pdev->dev;
-	unsigned long rate;
+	long rate;
 	int ret;
 
-	switch (speed) {
-	case 10:
-		rate = 2500000;
-		break;
-	case 100:
-		rate = 25000000;
-		break;
-	case 1000:
-		rate = 125000000;
-		break;
-	default:
+	rate = rgmii_clock(speed);
+	if (rate < 0) {
 		dev_err(dev, "unknown speed value for GMAC speed=%d", speed);
 		return;
 	}
@@ -1540,20 +1531,11 @@ static void rv1126_set_rgmii_speed(struct rk_priv_data *bsp_priv, int speed)
 {
 	struct clk *clk_mac_speed = bsp_priv->clks[RK_CLK_MAC_SPEED].clk;
 	struct device *dev = &bsp_priv->pdev->dev;
-	unsigned long rate;
+	long rate;
 	int ret;
 
-	switch (speed) {
-	case 10:
-		rate = 2500000;
-		break;
-	case 100:
-		rate = 25000000;
-		break;
-	case 1000:
-		rate = 125000000;
-		break;
-	default:
+	rate = rgmii_clock(speed);
+	if (rate < 0) {
 		dev_err(dev, "unknown speed value for RGMII speed=%d", speed);
 		return;
 	}

-- 
2.47.0

[PATCH net-next v8 09/15] net: dwmac-starfive: Use helper rgmii_clock

[Jan Petrous via B4 Relay]

From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>

Utilize a new helper function rgmii_clock().

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c | 19 ++++---------------
 1 file changed, 4 insertions(+), 15 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
index 421666279dd3..0a0a363d3730 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
@@ -34,24 +34,13 @@ struct starfive_dwmac {
 static void starfive_dwmac_fix_mac_speed(void *priv, unsigned int speed, unsigned int mode)
 {
 	struct starfive_dwmac *dwmac = priv;
-	unsigned long rate;
+	long rate;
 	int err;
 
-	rate = clk_get_rate(dwmac->clk_tx);
-
-	switch (speed) {
-	case SPEED_1000:
-		rate = 125000000;
-		break;
-	case SPEED_100:
-		rate = 25000000;
-		break;
-	case SPEED_10:
-		rate = 2500000;
-		break;
-	default:
+	rate = rgmii_clock(speed);
+	if (rate < 0) {
 		dev_err(dwmac->dev, "invalid speed %u\n", speed);
-		break;
+		return;
 	}
 
 	err = clk_set_rate(dwmac->clk_tx, rate);

-- 
2.47.0

[PATCH net-next v8 10/15] net: macb: Use helper rgmii_clock

[Jan Petrous via B4 Relay]

From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>

Utilize a new helper function rgmii_clock().

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
---
 drivers/net/ethernet/cadence/macb_main.c | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index daa416fb1724..640f500f989d 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -530,19 +530,9 @@ static void macb_set_tx_clk(struct macb *bp, int speed)
 	if (bp->phy_interface == PHY_INTERFACE_MODE_MII)
 		return;
 
-	switch (speed) {
-	case SPEED_10:
-		rate = 2500000;
-		break;
-	case SPEED_100:
-		rate = 25000000;
-		break;
-	case SPEED_1000:
-		rate = 125000000;
-		break;
-	default:
+	rate = rgmii_clock(speed);
+	if (rate < 0)
 		return;
-	}
 
 	rate_rounded = clk_round_rate(bp->tx_clk, rate);
 	if (rate_rounded < 0)

-- 
2.47.0

Re: [PATCH net-next v8 10/15] net: macb: Use helper rgmii_clock

[Nicolas Ferre]

On 05/12/2024 at 17:43, Jan Petrous via B4 Relay wrote:
> From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>
> 
> Utilize a new helper function rgmii_clock().
> 
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
> Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
> Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>

If needed:
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>

Thanks, best regards,
   Nicolas

> ---
>   drivers/net/ethernet/cadence/macb_main.c | 14 ++------------
>   1 file changed, 2 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
> index daa416fb1724..640f500f989d 100644
> --- a/drivers/net/ethernet/cadence/macb_main.c
> +++ b/drivers/net/ethernet/cadence/macb_main.c
> @@ -530,19 +530,9 @@ static void macb_set_tx_clk(struct macb *bp, int speed)
>          if (bp->phy_interface == PHY_INTERFACE_MODE_MII)
>                  return;
> 
> -       switch (speed) {
> -       case SPEED_10:
> -               rate = 2500000;
> -               break;
> -       case SPEED_100:
> -               rate = 25000000;
> -               break;
> -       case SPEED_1000:
> -               rate = 125000000;
> -               break;
> -       default:
> +       rate = rgmii_clock(speed);
> +       if (rate < 0)
>                  return;
> -       }
> 
>          rate_rounded = clk_round_rate(bp->tx_clk, rate);
>          if (rate_rounded < 0)
> 
> --
> 2.47.0
> 
> 

[PATCH net-next v8 11/15] net: xgene_enet: Use helper rgmii_clock

[Jan Petrous via B4 Relay]

From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>

Utilize a new helper function rgmii_clock().

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
---
 drivers/net/ethernet/apm/xgene/xgene_enet_hw.c | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
index e641dbbea1e2..b854b6b42d77 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
@@ -421,18 +421,12 @@ static void xgene_enet_configure_clock(struct xgene_enet_pdata *pdata)
 
 	if (dev->of_node) {
 		struct clk *parent = clk_get_parent(pdata->clk);
+		long rate = rgmii_clock(pdata->phy_speed);
 
-		switch (pdata->phy_speed) {
-		case SPEED_10:
-			clk_set_rate(parent, 2500000);
-			break;
-		case SPEED_100:
-			clk_set_rate(parent, 25000000);
-			break;
-		default:
-			clk_set_rate(parent, 125000000);
-			break;
-		}
+		if (rate < 0)
+			rate = 125000000;
+
+		clk_set_rate(parent, rate);
 	}
 #ifdef CONFIG_ACPI
 	else {

-- 
2.47.0

[PATCH net-next v8 12/15] net: dwmac-sti: Use helper rgmii_clock

[Jan Petrous via B4 Relay]

From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>

Utilize a new helper function rgmii_clock().

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-sti.c | 18 +++++-------------
 1 file changed, 5 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sti.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sti.c
index a6ff02d905a9..eabc4da9e1a9 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sti.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sti.c
@@ -21,10 +21,7 @@
 
 #include "stmmac_platform.h"
 
-#define DWMAC_125MHZ	125000000
 #define DWMAC_50MHZ	50000000
-#define DWMAC_25MHZ	25000000
-#define DWMAC_2_5MHZ	2500000
 
 #define IS_PHY_IF_MODE_RGMII(iface)	(iface == PHY_INTERFACE_MODE_RGMII || \
 			iface == PHY_INTERFACE_MODE_RGMII_ID || \
@@ -140,7 +137,7 @@ static void stih4xx_fix_retime_src(void *priv, u32 spd, unsigned int mode)
 	struct sti_dwmac *dwmac = priv;
 	u32 src = dwmac->tx_retime_src;
 	u32 reg = dwmac->ctrl_reg;
-	u32 freq = 0;
+	long freq = 0;
 
 	if (dwmac->interface == PHY_INTERFACE_MODE_MII) {
 		src = TX_RETIME_SRC_TXCLK;
@@ -153,19 +150,14 @@ static void stih4xx_fix_retime_src(void *priv, u32 spd, unsigned int mode)
 		}
 	} else if (IS_PHY_IF_MODE_RGMII(dwmac->interface)) {
 		/* On GiGa clk source can be either ext or from clkgen */
-		if (spd == SPEED_1000) {
-			freq = DWMAC_125MHZ;
-		} else {
+		freq = rgmii_clock(spd);
+
+		if (spd != SPEED_1000 && freq > 0)
 			/* Switch to clkgen for these speeds */
 			src = TX_RETIME_SRC_CLKGEN;
-			if (spd == SPEED_100)
-				freq = DWMAC_25MHZ;
-			else if (spd == SPEED_10)
-				freq = DWMAC_2_5MHZ;
-		}
 	}
 
-	if (src == TX_RETIME_SRC_CLKGEN && freq)
+	if (src == TX_RETIME_SRC_CLKGEN && freq > 0)
 		clk_set_rate(dwmac->clk, freq);
 
 	regmap_update_bits(dwmac->regmap, reg, STIH4XX_RETIME_SRC_MASK,

-- 
2.47.0

[PATCH net-next v8 13/15] dt-bindings: net: Add DT bindings for DWMAC on NXP S32G/R SoCs

[Jan Petrous via B4 Relay]

From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>

Add basic description for DWMAC ethernet IP on NXP S32G2xx, S32G3xx
and S32R45 automotive series SoCs.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
---
 .../devicetree/bindings/net/nxp,s32-dwmac.yaml     | 105 +++++++++++++++++++++
 .../devicetree/bindings/net/snps,dwmac.yaml        |   1 +
 2 files changed, 106 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml b/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml
new file mode 100644
index 000000000000..2b8b74c5feec
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml
@@ -0,0 +1,105 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright 2021-2024 NXP
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/nxp,s32-dwmac.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP S32G2xx/S32G3xx/S32R45 GMAC ethernet controller
+
+maintainers:
+  - Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
+
+description:
+  This device is a Synopsys DWC IP, integrated on NXP S32G/R SoCs.
+  The SoC series S32G2xx and S32G3xx feature one DWMAC instance,
+  the SoC S32R45 has two instances. The devices can use RGMII/RMII/MII
+  interface over Pinctrl device or the output can be routed
+  to the embedded SerDes for SGMII connectivity.
+
+properties:
+  compatible:
+    oneOf:
+      - const: nxp,s32g2-dwmac
+      - items:
+          - enum:
+              - nxp,s32g3-dwmac
+              - nxp,s32r45-dwmac
+          - const: nxp,s32g2-dwmac
+
+  reg:
+    items:
+      - description: Main GMAC registers
+      - description: GMAC PHY mode control register
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-names:
+    const: macirq
+
+  clocks:
+    items:
+      - description: Main GMAC clock
+      - description: Transmit clock
+      - description: Receive clock
+      - description: PTP reference clock
+
+  clock-names:
+    items:
+      - const: stmmaceth
+      - const: tx
+      - const: rx
+      - const: ptp_ref
+
+required:
+  - clocks
+  - clock-names
+
+allOf:
+  - $ref: snps,dwmac.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/phy/phy.h>
+    bus {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      ethernet@4033c000 {
+        compatible = "nxp,s32g2-dwmac";
+        reg = <0x0 0x4033c000 0x0 0x2000>, /* gmac IP */
+              <0x0 0x4007c004 0x0 0x4>;    /* GMAC_0_CTRL_STS */
+        interrupt-parent = <&gic>;
+        interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-names = "macirq";
+        snps,mtl-rx-config = <&mtl_rx_setup>;
+        snps,mtl-tx-config = <&mtl_tx_setup>;
+        clocks = <&clks 24>, <&clks 17>, <&clks 16>, <&clks 15>;
+        clock-names = "stmmaceth", "tx", "rx", "ptp_ref";
+        phy-mode = "rgmii-id";
+        phy-handle = <&phy0>;
+
+        mtl_rx_setup: rx-queues-config {
+          snps,rx-queues-to-use = <5>;
+        };
+
+        mtl_tx_setup: tx-queues-config {
+          snps,tx-queues-to-use = <5>;
+        };
+
+        mdio {
+          #address-cells = <1>;
+          #size-cells = <0>;
+          compatible = "snps,dwmac-mdio";
+
+          phy0: ethernet-phy@0 {
+            reg = <0>;
+          };
+        };
+      };
+    };
diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
index eb1f3ae41ab9..91e75eb3f329 100644
--- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
@@ -67,6 +67,7 @@ properties:
         - ingenic,x2000-mac
         - loongson,ls2k-dwmac
         - loongson,ls7a-dwmac
+        - nxp,s32g2-dwmac
         - qcom,qcs404-ethqos
         - qcom,sa8775p-ethqos
         - qcom,sc8280xp-ethqos

-- 
2.47.0

[PATCH net-next v8 14/15] net: stmmac: dwmac-s32: add basic NXP S32G/S32R glue driver

[Jan Petrous via B4 Relay]

From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>

NXP S32G2xx/S32G3xx and S32R45 are automotive grade SoCs
that integrate one or two Synopsys DWMAC 5.10/5.20 IPs.

The basic driver supports only RGMII interface.

Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
---
 drivers/net/ethernet/stmicro/stmmac/Kconfig     |  12 ++
 drivers/net/ethernet/stmicro/stmmac/Makefile    |   1 +
 drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c | 202 ++++++++++++++++++++++++
 3 files changed, 215 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
index 6658536a4e17..4cc85a36a1ab 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
+++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
@@ -154,6 +154,18 @@ config DWMAC_RZN1
 	  the stmmac device driver. This support can make use of a custom MII
 	  converter PCS device.
 
+config DWMAC_S32
+	tristate "NXP S32G/S32R GMAC support"
+	default ARCH_S32
+	depends on OF && (ARCH_S32 || COMPILE_TEST)
+	help
+	  Support for ethernet controller on NXP S32CC SOCs.
+
+	  This selects NXP SoC glue layer support for the stmmac
+	  device driver. This driver is used for the S32CC series
+	  SOCs GMAC ethernet controller, ie. S32G2xx, S32G3xx and
+	  S32R45.
+
 config DWMAC_SOCFPGA
 	tristate "SOCFPGA dwmac support"
 	default ARCH_INTEL_SOCFPGA
diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile
index 2389fd261344..b26f0e79c2b3 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Makefile
+++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
@@ -22,6 +22,7 @@ obj-$(CONFIG_DWMAC_MESON)	+= dwmac-meson.o dwmac-meson8b.o
 obj-$(CONFIG_DWMAC_QCOM_ETHQOS)	+= dwmac-qcom-ethqos.o
 obj-$(CONFIG_DWMAC_ROCKCHIP)	+= dwmac-rk.o
 obj-$(CONFIG_DWMAC_RZN1)	+= dwmac-rzn1.o
+obj-$(CONFIG_DWMAC_S32)		+= dwmac-s32.o
 obj-$(CONFIG_DWMAC_SOCFPGA)	+= dwmac-altr-socfpga.o
 obj-$(CONFIG_DWMAC_STARFIVE)	+= dwmac-starfive.o
 obj-$(CONFIG_DWMAC_STI)		+= dwmac-sti.o
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c
new file mode 100644
index 000000000000..9cc0e5817416
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c
@@ -0,0 +1,202 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * NXP S32G/R GMAC glue layer
+ *
+ * Copyright 2019-2024 NXP
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/ethtool.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_mdio.h>
+#include <linux/of_address.h>
+#include <linux/phy.h>
+#include <linux/phylink.h>
+#include <linux/platform_device.h>
+#include <linux/stmmac.h>
+
+#include "stmmac_platform.h"
+
+#define GMAC_INTF_RATE_125M	125000000	/* 125MHz */
+
+/* SoC PHY interface control register */
+#define PHY_INTF_SEL_MII	0x00
+#define PHY_INTF_SEL_SGMII	0x01
+#define PHY_INTF_SEL_RGMII	0x02
+#define PHY_INTF_SEL_RMII	0x08
+
+struct s32_priv_data {
+	void __iomem *ioaddr;
+	void __iomem *ctrl_sts;
+	struct device *dev;
+	phy_interface_t *intf_mode;
+	struct clk *tx_clk;
+	struct clk *rx_clk;
+};
+
+static int s32_gmac_write_phy_intf_select(struct s32_priv_data *gmac)
+{
+	writel(PHY_INTF_SEL_RGMII, gmac->ctrl_sts);
+
+	dev_dbg(gmac->dev, "PHY mode set to %s\n", phy_modes(*gmac->intf_mode));
+
+	return 0;
+}
+
+static int s32_gmac_init(struct platform_device *pdev, void *priv)
+{
+	struct s32_priv_data *gmac = priv;
+	int ret;
+
+	/* Set initial TX interface clock */
+	ret = clk_prepare_enable(gmac->tx_clk);
+	if (ret) {
+		dev_err(&pdev->dev, "Can't enable tx clock\n");
+		return ret;
+	}
+	ret = clk_set_rate(gmac->tx_clk, GMAC_INTF_RATE_125M);
+	if (ret) {
+		dev_err(&pdev->dev, "Can't set tx clock\n");
+		goto err_tx_disable;
+	}
+
+	/* Set initial RX interface clock */
+	ret = clk_prepare_enable(gmac->rx_clk);
+	if (ret) {
+		dev_err(&pdev->dev, "Can't enable rx clock\n");
+		goto err_tx_disable;
+	}
+	ret = clk_set_rate(gmac->rx_clk, GMAC_INTF_RATE_125M);
+	if (ret) {
+		dev_err(&pdev->dev, "Can't set rx clock\n");
+		goto err_txrx_disable;
+	}
+
+	/* Set interface mode */
+	ret = s32_gmac_write_phy_intf_select(gmac);
+	if (ret) {
+		dev_err(&pdev->dev, "Can't set PHY interface mode\n");
+		goto err_txrx_disable;
+	}
+
+	return 0;
+
+err_txrx_disable:
+	clk_disable_unprepare(gmac->rx_clk);
+err_tx_disable:
+	clk_disable_unprepare(gmac->tx_clk);
+	return ret;
+}
+
+static void s32_gmac_exit(struct platform_device *pdev, void *priv)
+{
+	struct s32_priv_data *gmac = priv;
+
+	clk_disable_unprepare(gmac->tx_clk);
+	clk_disable_unprepare(gmac->rx_clk);
+}
+
+static void s32_fix_mac_speed(void *priv, unsigned int speed, unsigned int mode)
+{
+	struct s32_priv_data *gmac = priv;
+	long tx_clk_rate;
+	int ret;
+
+	tx_clk_rate = rgmii_clock(speed);
+	if (tx_clk_rate < 0) {
+		dev_err(gmac->dev, "Unsupported/Invalid speed: %d\n", speed);
+		return;
+	}
+
+	dev_dbg(gmac->dev, "Set tx clock to %ld Hz\n", tx_clk_rate);
+	ret = clk_set_rate(gmac->tx_clk, tx_clk_rate);
+	if (ret)
+		dev_err(gmac->dev, "Can't set tx clock\n");
+}
+
+static int s32_dwmac_probe(struct platform_device *pdev)
+{
+	struct plat_stmmacenet_data *plat;
+	struct device *dev = &pdev->dev;
+	struct stmmac_resources res;
+	struct s32_priv_data *gmac;
+	int ret;
+
+	gmac = devm_kzalloc(&pdev->dev, sizeof(*gmac), GFP_KERNEL);
+	if (!gmac)
+		return -ENOMEM;
+
+	gmac->dev = &pdev->dev;
+
+	ret = stmmac_get_platform_resources(pdev, &res);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to get platform resources\n");
+
+	plat = devm_stmmac_probe_config_dt(pdev, res.mac);
+	if (IS_ERR(plat))
+		return dev_err_probe(dev, PTR_ERR(plat),
+				     "dt configuration failed\n");
+
+	/* PHY interface mode control reg */
+	gmac->ctrl_sts = devm_platform_get_and_ioremap_resource(pdev, 1, NULL);
+	if (IS_ERR(gmac->ctrl_sts))
+		return dev_err_probe(dev, PTR_ERR(gmac->ctrl_sts),
+				     "S32CC config region is missing\n");
+
+	/* tx clock */
+	gmac->tx_clk = devm_clk_get(&pdev->dev, "tx");
+	if (IS_ERR(gmac->tx_clk))
+		return dev_err_probe(dev, PTR_ERR(gmac->tx_clk),
+				     "tx clock not found\n");
+
+	/* rx clock */
+	gmac->rx_clk = devm_clk_get(&pdev->dev, "rx");
+	if (IS_ERR(gmac->rx_clk))
+		return dev_err_probe(dev, PTR_ERR(gmac->rx_clk),
+				     "rx clock not found\n");
+
+	gmac->intf_mode = &plat->phy_interface;
+	gmac->ioaddr = res.addr;
+
+	/* S32CC core feature set */
+	plat->has_gmac4 = true;
+	plat->pmt = 1;
+	plat->flags |= STMMAC_FLAG_SPH_DISABLE;
+	plat->rx_fifo_size = 20480;
+	plat->tx_fifo_size = 20480;
+
+	plat->init = s32_gmac_init;
+	plat->exit = s32_gmac_exit;
+	plat->fix_mac_speed = s32_fix_mac_speed;
+
+	plat->bsp_priv = gmac;
+
+	return stmmac_pltfr_probe(pdev, plat, &res);
+}
+
+static const struct of_device_id s32_dwmac_match[] = {
+	{ .compatible = "nxp,s32g2-dwmac" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, s32_dwmac_match);
+
+static struct platform_driver s32_dwmac_driver = {
+	.probe = s32_dwmac_probe,
+	.remove = stmmac_pltfr_remove,
+	.driver = {
+		.name = "s32-dwmac",
+		.pm = &stmmac_pltfr_pm_ops,
+		.of_match_table = s32_dwmac_match,
+	},
+};
+module_platform_driver(s32_dwmac_driver);
+
+MODULE_AUTHOR("Jan Petrous (OSS) <jan.petrous@oss.nxp.com>");
+MODULE_DESCRIPTION("NXP S32G/R common chassis GMAC driver");
+MODULE_LICENSE("GPL");
+

-- 
2.47.0

[PATCH net-next v8 15/15] MAINTAINERS: Add Jan Petrous as the NXP S32G/R DWMAC driver maintainer

[Jan Petrous via B4 Relay]

From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>

Add myself as NXP S32G/R DWMAC Ethernet driver maintainer.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
---
 MAINTAINERS | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 1e930c7a58b1..baf41d73d14e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2836,6 +2836,13 @@ S:	Maintained
 F:	arch/arm64/boot/dts/freescale/s32g*.dts*
 F:	drivers/pinctrl/nxp/
 
+ARM/NXP S32G/S32R DWMAC ETHERNET DRIVER
+M:	Jan Petrous <jan.petrous@oss.nxp.com>
+L:	NXP S32 Linux Team <s32@nxp.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml
+F:	drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c
+
 ARM/Orion SoC/Technologic Systems TS-78xx platform support
 M:	Alexander Clouter <alex@digriz.org.uk>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)

-- 
2.47.0

Re: [PATCH net-next v8 00/15] Add support for Synopsis DWMAC IP on NXP Automotive SoCs S32G2xx/S32G3xx/S32R45

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Thu, 05 Dec 2024 17:42:57 +0100 you wrote:
> The SoC series S32G2xx and S32G3xx feature one DWMAC instance,
> the SoC S32R45 has two instances. The devices can use RGMII/RMII/MII
> interface over Pinctrl device or the output can be routed
> to the embedded SerDes for SGMII connectivity.
> 
> The provided stmmac glue code implements only basic functionality,
> interface support is restricted to RGMII only. More, including
> SGMII/SerDes support will come later.
> 
> [...]

Here is the summary with links:
  - [net-next,v8,01/15] net: stmmac: Fix CSR divider comment
    https://git.kernel.org/netdev/net-next/c/31cdd8418234
  - [net-next,v8,02/15] net: stmmac: Extend CSR calc support
    https://git.kernel.org/netdev/net-next/c/c8fab05d021d
  - [net-next,v8,03/15] net: stmmac: Fix clock rate variables size
    https://git.kernel.org/netdev/net-next/c/cb09f61a9ab8
  - [net-next,v8,04/15] net: phy: Add helper for mapping RGMII link speed to clock rate
    https://git.kernel.org/netdev/net-next/c/386aa60abdb6
  - [net-next,v8,05/15] net: dwmac-dwc-qos-eth: Use helper rgmii_clock
    https://git.kernel.org/netdev/net-next/c/37b66c483e4c
  - [net-next,v8,06/15] net: dwmac-imx: Use helper rgmii_clock
    https://git.kernel.org/netdev/net-next/c/839b75ea4d94
  - [net-next,v8,07/15] net: dwmac-intel-plat: Use helper rgmii_clock
    https://git.kernel.org/netdev/net-next/c/8470bfc83515
  - [net-next,v8,08/15] net: dwmac-rk: Use helper rgmii_clock
    https://git.kernel.org/netdev/net-next/c/30b4a9b5c335
  - [net-next,v8,09/15] net: dwmac-starfive: Use helper rgmii_clock
    https://git.kernel.org/netdev/net-next/c/b561d717a799
  - [net-next,v8,10/15] net: macb: Use helper rgmii_clock
    https://git.kernel.org/netdev/net-next/c/04207d28f468
  - [net-next,v8,11/15] net: xgene_enet: Use helper rgmii_clock
    https://git.kernel.org/netdev/net-next/c/fd59bca4d5ea
  - [net-next,v8,12/15] net: dwmac-sti: Use helper rgmii_clock
    https://git.kernel.org/netdev/net-next/c/1ead57775507
  - [net-next,v8,13/15] dt-bindings: net: Add DT bindings for DWMAC on NXP S32G/R SoCs
    https://git.kernel.org/netdev/net-next/c/91f10e589520
  - [net-next,v8,14/15] net: stmmac: dwmac-s32: add basic NXP S32G/S32R glue driver
    https://git.kernel.org/netdev/net-next/c/cd197ac5d661
  - [net-next,v8,15/15] MAINTAINERS: Add Jan Petrous as the NXP S32G/R DWMAC driver maintainer
    https://git.kernel.org/netdev/net-next/c/6bc6234cbd5e

You are awesome, thank you!
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