[PATCH v2 0/5] Add Renesas RZ/V2M Ethernet support

[PATCH v2 0/5] Add Renesas RZ/V2M Ethernet support

[Phil Edworthy]

The RZ/V2M Ethernet is very similar to R-Car Gen3 Ethernet-AVB, though
some small parts are the same as R-Car Gen2.
Other differences are:
* It has separate data (DI), error (Line 1) and management (Line 2) irqs
  rather than one irq for all three.
* Instead of using the High-speed peripheral bus clock for gPTP, it has
  a separate gPTP reference clock.

v2:
 * Just net patches in this series
 * Instead of reusing ch22 and ch24 interrupt names, use the proper names
 * Renamed irq_en_dis_regs to irq_en_dis
 * Squashed use of GIC reg versus GIE/GID and got rid of separate gptp_ptm_gic feature.
 * Move err_mgmt_irqs code under multi_irqs
 * Minor editing of the commit msgs


Phil Edworthy (5):
  dt-bindings: net: renesas,etheravb: Document RZ/V2M SoC
  ravb: Separate handling of irq enable/disable regs into feature
  ravb: Support separate Line0 (Desc), Line1 (Err) and Line2 (Mgmt) irqs
  ravb: Use separate clock for gPTP
  ravb: Add support for RZ/V2M

 .../bindings/net/renesas,etheravb.yaml        |  82 ++++++++++----
 drivers/net/ethernet/renesas/ravb.h           |   6 ++
 drivers/net/ethernet/renesas/ravb_main.c      | 102 ++++++++++++++++--
 drivers/net/ethernet/renesas/ravb_ptp.c       |   4 +-
 4 files changed, 162 insertions(+), 32 deletions(-)

-- 
2.32.0

[PATCH v2 1/5] dt-bindings: net: renesas,etheravb: Document RZ/V2M SoC

[Phil Edworthy]

Document the Ethernet AVB IP found on RZ/V2M SoC.
It includes the Ethernet controller (E-MAC) and Dedicated Direct memory
access controller (DMAC) for transferring transmitted Ethernet frames
to and received Ethernet frames from respective storage areas in the
RAM at high speed.
The AVB-DMAC is compliant with IEEE 802.1BA, IEEE 802.1AS timing and
synchronization protocol, IEEE 802.1Qav real-time transfer, and the
IEEE 802.1Qat stream reservation protocol.

R-Car has a pair of combined interrupt lines:
 ch22 = Line0_DiA | Line1_A | Line2_A
 ch23 = Line0_DiB | Line1_B | Line2_B
Line0 for descriptor interrupts (which we call dia and dib).
Line1 for error related interrupts (which we call err_a and err_b).
Line2 for management and gPTP related interrupts (mgmt_a and mgmt_b).

RZ/V2M hardware has separate interrupt lines for each of these.

It has 3 clocks; the main AXI clock, the AMBA CHI (Coherent Hub
Interface) clock and a gPTP reference clock.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
------
v2:
 - Instead of reusing ch22 and ch24 interupt names, use the proper names
---
 .../bindings/net/renesas,etheravb.yaml        | 82 ++++++++++++++-----
 1 file changed, 61 insertions(+), 21 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/renesas,etheravb.yaml b/Documentation/devicetree/bindings/net/renesas,etheravb.yaml
index ee2ccacc39ff..acf347f3cdbe 100644
--- a/Documentation/devicetree/bindings/net/renesas,etheravb.yaml
+++ b/Documentation/devicetree/bindings/net/renesas,etheravb.yaml
@@ -43,6 +43,11 @@ properties:
               - renesas,etheravb-r8a779a0     # R-Car V3U
           - const: renesas,etheravb-rcar-gen3 # R-Car Gen3 and RZ/G2
 
+      - items:
+          - enum:
+              - renesas,etheravb-r9a09g011 # RZ/V2M
+          - const: renesas,etheravb-rzv2m  # RZ/V2M compatible
+
       - items:
           - enum:
               - renesas,r9a07g043-gbeth # RZ/G2UL
@@ -160,16 +165,33 @@ allOf:
             - const: arp_ns
         rx-internal-delay-ps: false
     else:
-      properties:
-        interrupts:
-          minItems: 25
-          maxItems: 25
-        interrupt-names:
-          items:
-            pattern: '^ch[0-9]+$'
-      required:
-        - interrupt-names
-        - rx-internal-delay-ps
+      if:
+        properties:
+          compatible:
+            contains:
+              const: renesas,etheravb-rzv2m
+      then:
+        properties:
+          interrupts:
+            minItems: 29
+            maxItems: 29
+          interrupt-names:
+            items:
+              pattern: '^(ch(1?)[0-9])|ch20|ch21|dia|dib|err_a|err_b|mgmt_a|mgmt_b|line3$'
+          rx-internal-delay-ps: false
+        required:
+          - interrupt-names
+      else:
+        properties:
+          interrupts:
+            minItems: 25
+            maxItems: 25
+          interrupt-names:
+            items:
+              pattern: '^ch[0-9]+$'
+        required:
+          - interrupt-names
+          - rx-internal-delay-ps
 
   - if:
       properties:
@@ -231,17 +253,35 @@ allOf:
             - const: chi
             - const: refclk
     else:
-      properties:
-        clocks:
-          minItems: 1
-          items:
-            - description: AVB functional clock
-            - description: Optional TXC reference clock
-        clock-names:
-          minItems: 1
-          items:
-            - const: fck
-            - const: refclk
+      if:
+        properties:
+          compatible:
+            contains:
+              const: renesas,etheravb-rzv2m
+      then:
+        properties:
+          clocks:
+            items:
+              - description: Main clock
+              - description: Coherent Hub Interface clock
+              - description: gPTP reference clock
+          clock-names:
+            items:
+              - const: axi
+              - const: chi
+              - const: gptp
+      else:
+        properties:
+          clocks:
+            minItems: 1
+            items:
+              - description: AVB functional clock
+              - description: Optional TXC reference clock
+          clock-names:
+            minItems: 1
+            items:
+              - const: fck
+              - const: refclk
 
 additionalProperties: false
 
-- 
2.32.0

[PATCH v2 2/5] ravb: Separate handling of irq enable/disable regs into feature

[Phil Edworthy]

Currently, when the HW has a single interrupt, the driver uses the
GIC, TIC, RIC0 registers to enable and disable interrupts.
When the HW has multiple interrupts, it uses the GIE, GID, TIE, TID,
RIE0, RID0 registers.

However, other devices, e.g. RZ/V2M, have multiple irqs and only have
the GIC, TIC, RIC0 registers.
Therefore, split this into a separate feature.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
---
v2:
 - Renamed irq_en_dis_regs to irq_en_dis
 - Squashed use of GIC reg versus GIE/GID into this patch and got rid
   of separate gptp_ptm_gic feature.
 - Minor editing of the commit msg
---
 drivers/net/ethernet/renesas/ravb.h      | 1 +
 drivers/net/ethernet/renesas/ravb_main.c | 5 +++--
 drivers/net/ethernet/renesas/ravb_ptp.c  | 4 ++--
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 08062d73df10..0ec8256f7eef 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1027,6 +1027,7 @@ struct ravb_hw_info {
 	unsigned tx_counters:1;		/* E-MAC has TX counters */
 	unsigned carrier_counters:1;	/* E-MAC has carrier counters */
 	unsigned multi_irqs:1;		/* AVB-DMAC and E-MAC has multiple irqs */
+	unsigned irq_en_dis_regs:1;	/* Has separate irq enable and disable regs */
 	unsigned gptp:1;		/* AVB-DMAC has gPTP support */
 	unsigned ccc_gac:1;		/* AVB-DMAC has gPTP support active in config mode */
 	unsigned nc_queues:1;		/* AVB-DMAC has RX and TX NC queues */
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 525d66f71f02..5f45c8d68f11 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1124,7 +1124,7 @@ static bool ravb_queue_interrupt(struct net_device *ndev, int q)
 	if (((ris0 & ric0) & BIT(q)) || ((tis  & tic)  & BIT(q))) {
 		if (napi_schedule_prep(&priv->napi[q])) {
 			/* Mask RX and TX interrupts */
-			if (!info->multi_irqs) {
+			if (!info->irq_en_dis_regs) {
 				ravb_write(ndev, ric0 & ~BIT(q), RIC0);
 				ravb_write(ndev, tic & ~BIT(q), TIC);
 			} else {
@@ -1306,7 +1306,7 @@ static int ravb_poll(struct napi_struct *napi, int budget)
 
 	/* Re-enable RX/TX interrupts */
 	spin_lock_irqsave(&priv->lock, flags);
-	if (!info->multi_irqs) {
+	if (!info->irq_en_dis_regs) {
 		ravb_modify(ndev, RIC0, mask, mask);
 		ravb_modify(ndev, TIC,  mask, mask);
 	} else {
@@ -2410,6 +2410,7 @@ static const struct ravb_hw_info ravb_gen3_hw_info = {
 	.internal_delay = 1,
 	.tx_counters = 1,
 	.multi_irqs = 1,
+	.irq_en_dis_regs = 1,
 	.ccc_gac = 1,
 	.nc_queues = 1,
 	.magic_pkt = 1,
diff --git a/drivers/net/ethernet/renesas/ravb_ptp.c b/drivers/net/ethernet/renesas/ravb_ptp.c
index c099656dd75b..a7726c2ed594 100644
--- a/drivers/net/ethernet/renesas/ravb_ptp.c
+++ b/drivers/net/ethernet/renesas/ravb_ptp.c
@@ -254,7 +254,7 @@ static int ravb_ptp_perout(struct ptp_clock_info *ptp,
 		error = ravb_ptp_update_compare(priv, (u32)start_ns);
 		if (!error) {
 			/* Unmask interrupt */
-			if (!info->multi_irqs)
+			if (!info->irq_en_dis_regs)
 				ravb_modify(ndev, GIC, GIC_PTME, GIC_PTME);
 			else
 				ravb_write(ndev, GIE_PTMS0, GIE);
@@ -266,7 +266,7 @@ static int ravb_ptp_perout(struct ptp_clock_info *ptp,
 		perout->period = 0;
 
 		/* Mask interrupt */
-		if (!info->multi_irqs)
+		if (!info->irq_en_dis_regs)
 			ravb_modify(ndev, GIC, GIC_PTME, 0);
 		else
 			ravb_write(ndev, GID_PTMD0, GID);
-- 
2.32.0

Re: [PATCH v2 2/5] ravb: Separate handling of irq enable/disable regs into feature

[Sergey Shtylyov]

Hello!

On 5/9/22 5:24 PM, Phil Edworthy wrote:

> Currently, when the HW has a single interrupt, the driver uses the
> GIC, TIC, RIC0 registers to enable and disable interrupts.
> When the HW has multiple interrupts, it uses the GIE, GID, TIE, TID,
> RIE0, RID0 registers.
> 
> However, other devices, e.g. RZ/V2M, have multiple irqs and only have
> the GIC, TIC, RIC0 registers.
> Therefore, split this into a separate feature.
> 
> Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
> Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
> ---
> v2:
>  - Renamed irq_en_dis_regs to irq_en_dis
>  - Squashed use of GIC reg versus GIE/GID into this patch and got rid
>    of separate gptp_ptm_gic feature.
>  - Minor editing of the commit msg
> ---
>  drivers/net/ethernet/renesas/ravb.h      | 1 +
>  drivers/net/ethernet/renesas/ravb_main.c | 5 +++--
>  drivers/net/ethernet/renesas/ravb_ptp.c  | 4 ++--
>  3 files changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
> index 08062d73df10..0ec8256f7eef 100644
> --- a/drivers/net/ethernet/renesas/ravb.h
> +++ b/drivers/net/ethernet/renesas/ravb.h
> @@ -1027,6 +1027,7 @@ struct ravb_hw_info {
>  	unsigned tx_counters:1;		/* E-MAC has TX counters */
>  	unsigned carrier_counters:1;	/* E-MAC has carrier counters */
>  	unsigned multi_irqs:1;		/* AVB-DMAC and E-MAC has multiple irqs */
> +	unsigned irq_en_dis_regs:1;	/* Has separate irq enable and disable regs */

   You forgot to actually rename it. ;-)

>  	unsigned gptp:1;		/* AVB-DMAC has gPTP support */
>  	unsigned ccc_gac:1;		/* AVB-DMAC has gPTP support active in config mode */
>  	unsigned nc_queues:1;		/* AVB-DMAC has RX and TX NC queues */
[...]
> diff --git a/drivers/net/ethernet/renesas/ravb_ptp.c b/drivers/net/ethernet/renesas/ravb_ptp.c
> index c099656dd75b..a7726c2ed594 100644
> --- a/drivers/net/ethernet/renesas/ravb_ptp.c
> +++ b/drivers/net/ethernet/renesas/ravb_ptp.c

    I think you missed the check in ravb_ptp_extts()...

[...]

MBR, Sergey

[PATCH v2 3/5] ravb: Support separate Line0 (Desc), Line1 (Err) and Line2 (Mgmt) irqs

[Phil Edworthy]

R-Car has a combined interrupt line, ch22 = Line0_DiA | Line1_A | Line2_A.
RZ/V2M has separate interrupt lines for each of these, so add a feature
that allows the driver to get these interrupts and call the common handler.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
------
v2:
 - Move err_mgmt_irqs code under multi_irqs
 - Use dia, line3 irq names instead of ch22, ch24 when using err_mgmt_irqs
---
 drivers/net/ethernet/renesas/ravb.h      |  3 ++
 drivers/net/ethernet/renesas/ravb_main.c | 56 +++++++++++++++++++++---
 2 files changed, 53 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 0ec8256f7eef..4832beb0bddc 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1028,6 +1028,7 @@ struct ravb_hw_info {
 	unsigned carrier_counters:1;	/* E-MAC has carrier counters */
 	unsigned multi_irqs:1;		/* AVB-DMAC and E-MAC has multiple irqs */
 	unsigned irq_en_dis_regs:1;	/* Has separate irq enable and disable regs */
+	unsigned err_mgmt_irqs:1;	/* Line1 (Err) and Line2 (Mgmt) irqs are separate */
 	unsigned gptp:1;		/* AVB-DMAC has gPTP support */
 	unsigned ccc_gac:1;		/* AVB-DMAC has gPTP support active in config mode */
 	unsigned nc_queues:1;		/* AVB-DMAC has RX and TX NC queues */
@@ -1078,6 +1079,8 @@ struct ravb_private {
 	int msg_enable;
 	int speed;
 	int emac_irq;
+	int erra_irq;
+	int mgmta_irq;
 	int rx_irqs[NUM_RX_QUEUE];
 	int tx_irqs[NUM_TX_QUEUE];
 
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 5f45c8d68f11..d1e1ced33a08 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1798,12 +1798,23 @@ static int ravb_open(struct net_device *ndev)
 				      ndev, dev, "ch19:tx_nc");
 		if (error)
 			goto out_free_irq_nc_rx;
+
+		if (info->err_mgmt_irqs) {
+			error = ravb_hook_irq(priv->erra_irq, ravb_multi_interrupt,
+					      ndev, dev, "err_a");
+			if (error)
+				goto out_free_irq_nc_tx;
+			error = ravb_hook_irq(priv->mgmta_irq, ravb_multi_interrupt,
+					      ndev, dev, "mgmt_a");
+			if (error)
+				goto out_free_irq_erra;
+		}
 	}
 
 	/* Device init */
 	error = ravb_dmac_init(ndev);
 	if (error)
-		goto out_free_irq_nc_tx;
+		goto out_free_irq_mgmta;
 	ravb_emac_init(ndev);
 
 	/* Initialise PTP Clock driver */
@@ -1823,9 +1834,15 @@ static int ravb_open(struct net_device *ndev)
 	/* Stop PTP Clock driver */
 	if (info->gptp)
 		ravb_ptp_stop(ndev);
-out_free_irq_nc_tx:
+out_free_irq_mgmta:
 	if (!info->multi_irqs)
 		goto out_free_irq;
+	if (info->err_mgmt_irqs)
+		free_irq(priv->mgmta_irq, ndev);
+out_free_irq_erra:
+	if (info->err_mgmt_irqs)
+		free_irq(priv->erra_irq, ndev);
+out_free_irq_nc_tx:
 	free_irq(priv->tx_irqs[RAVB_NC], ndev);
 out_free_irq_nc_rx:
 	free_irq(priv->rx_irqs[RAVB_NC], ndev);
@@ -2166,6 +2183,10 @@ static int ravb_close(struct net_device *ndev)
 		free_irq(priv->tx_irqs[RAVB_BE], ndev);
 		free_irq(priv->rx_irqs[RAVB_BE], ndev);
 		free_irq(priv->emac_irq, ndev);
+		if (info->err_mgmt_irqs) {
+			free_irq(priv->erra_irq, ndev);
+			free_irq(priv->mgmta_irq, ndev);
+		}
 	}
 	free_irq(ndev->irq, ndev);
 
@@ -2595,10 +2616,14 @@ static int ravb_probe(struct platform_device *pdev)
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_get_sync(&pdev->dev);
 
-	if (info->multi_irqs)
-		irq = platform_get_irq_byname(pdev, "ch22");
-	else
+	if (info->multi_irqs) {
+		if (info->err_mgmt_irqs)
+			irq = platform_get_irq_byname(pdev, "dia");
+		else
+			irq = platform_get_irq_byname(pdev, "ch22");
+	} else {
 		irq = platform_get_irq(pdev, 0);
+	}
 	if (irq < 0) {
 		error = irq;
 		goto out_release;
@@ -2640,7 +2665,10 @@ static int ravb_probe(struct platform_device *pdev)
 		of_property_read_bool(np, "renesas,ether-link-active-low");
 
 	if (info->multi_irqs) {
-		irq = platform_get_irq_byname(pdev, "ch24");
+		if (info->err_mgmt_irqs)
+			irq = platform_get_irq_byname(pdev, "line3");
+		else
+			irq = platform_get_irq_byname(pdev, "ch24");
 		if (irq < 0) {
 			error = irq;
 			goto out_release;
@@ -2662,6 +2690,22 @@ static int ravb_probe(struct platform_device *pdev)
 			}
 			priv->tx_irqs[i] = irq;
 		}
+
+		if (info->err_mgmt_irqs) {
+			irq = platform_get_irq_byname(pdev, "err_a");
+			if (irq < 0) {
+				error = irq;
+				goto out_release;
+			}
+			priv->erra_irq = irq;
+
+			irq = platform_get_irq_byname(pdev, "mgmt_a");
+			if (irq < 0) {
+				error = irq;
+				goto out_release;
+			}
+			priv->mgmta_irq = irq;
+		}
 	}
 
 	priv->clk = devm_clk_get(&pdev->dev, NULL);
-- 
2.32.0

Re: [PATCH v2 3/5] ravb: Support separate Line0 (Desc), Line1 (Err) and Line2 (Mgmt) irqs

[Sergey Shtylyov]

On 5/9/22 5:24 PM, Phil Edworthy wrote:

> R-Car has a combined interrupt line, ch22 = Line0_DiA | Line1_A | Line2_A.

   R-Car gen3?

> RZ/V2M has separate interrupt lines for each of these, so add a feature
> that allows the driver to get these interrupts and call the common handler.
> 
> Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
> Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>

Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>

[...]

MBR, Sergey

[PATCH v2 4/5] ravb: Use separate clock for gPTP

[Phil Edworthy]

RZ/V2M has a separate gPTP reference clock that is used when the
AVB-DMAC Mode Register (CCC) gPTP Clock Select (CSEL) bits are
set to "01: High-speed peripheral bus clock".
Therefore, add a feature that allows this clock to be used for
gPTP.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
------
v2:
 - Added Reviewed-by tags
---
 drivers/net/ethernet/renesas/ravb.h      |  2 ++
 drivers/net/ethernet/renesas/ravb_main.c | 15 ++++++++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 4832beb0bddc..12360fc38d44 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1031,6 +1031,7 @@ struct ravb_hw_info {
 	unsigned err_mgmt_irqs:1;	/* Line1 (Err) and Line2 (Mgmt) irqs are separate */
 	unsigned gptp:1;		/* AVB-DMAC has gPTP support */
 	unsigned ccc_gac:1;		/* AVB-DMAC has gPTP support active in config mode */
+	unsigned gptp_ref_clk:1;	/* gPTP has separate reference clock */
 	unsigned nc_queues:1;		/* AVB-DMAC has RX and TX NC queues */
 	unsigned magic_pkt:1;		/* E-MAC supports magic packet detection */
 	unsigned half_duplex:1;		/* E-MAC supports half duplex mode */
@@ -1042,6 +1043,7 @@ struct ravb_private {
 	void __iomem *addr;
 	struct clk *clk;
 	struct clk *refclk;
+	struct clk *gptp_clk;
 	struct mdiobb_ctrl mdiobb;
 	u32 num_rx_ring[NUM_RX_QUEUE];
 	u32 num_tx_ring[NUM_TX_QUEUE];
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index d1e1ced33a08..0e1d9fc8a627 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -2495,11 +2495,15 @@ MODULE_DEVICE_TABLE(of, ravb_match_table);
 static int ravb_set_gti(struct net_device *ndev)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
 	struct device *dev = ndev->dev.parent;
 	unsigned long rate;
 	uint64_t inc;
 
-	rate = clk_get_rate(priv->clk);
+	if (info->gptp_ref_clk)
+		rate = clk_get_rate(priv->gptp_clk);
+	else
+		rate = clk_get_rate(priv->clk);
 	if (!rate)
 		return -EINVAL;
 
@@ -2721,6 +2725,15 @@ static int ravb_probe(struct platform_device *pdev)
 	}
 	clk_prepare_enable(priv->refclk);
 
+	if (info->gptp_ref_clk) {
+		priv->gptp_clk = devm_clk_get(&pdev->dev, "gptp");
+		if (IS_ERR(priv->gptp_clk)) {
+			error = PTR_ERR(priv->gptp_clk);
+			goto out_release;
+		}
+		clk_prepare_enable(priv->gptp_clk);
+	}
+
 	ndev->max_mtu = info->rx_max_buf_size - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
 	ndev->min_mtu = ETH_MIN_MTU;
 
-- 
2.32.0

[PATCH v2 5/5] ravb: Add support for RZ/V2M

[Phil Edworthy]

RZ/V2M Ethernet is very similar to R-Car Gen3 Ethernet-AVB, though
some small parts are the same as R-Car Gen2.
Other differences to R-Car Gen3 and Gen2 are:
* It has separate data (DI), error (Line 1) and management (Line 2) irqs
  rather than one irq for all three.
* Instead of using the High-speed peripheral bus clock for gPTP, it has a
  separate gPTP reference clock.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
---
v2:
 - Removed gptp_ptm_gic feature that is no longer needed.
---
 drivers/net/ethernet/renesas/ravb_main.c | 26 ++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 0e1d9fc8a627..0fbb0fbcf996 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -2460,6 +2460,31 @@ static const struct ravb_hw_info ravb_gen2_hw_info = {
 	.magic_pkt = 1,
 };
 
+static const struct ravb_hw_info ravb_rzv2m_hw_info = {
+	.rx_ring_free = ravb_rx_ring_free_rcar,
+	.rx_ring_format = ravb_rx_ring_format_rcar,
+	.alloc_rx_desc = ravb_alloc_rx_desc_rcar,
+	.receive = ravb_rx_rcar,
+	.set_rate = ravb_set_rate_rcar,
+	.set_feature = ravb_set_features_rcar,
+	.dmac_init = ravb_dmac_init_rcar,
+	.emac_init = ravb_emac_init_rcar,
+	.gstrings_stats = ravb_gstrings_stats,
+	.gstrings_size = sizeof(ravb_gstrings_stats),
+	.net_hw_features = NETIF_F_RXCSUM,
+	.net_features = NETIF_F_RXCSUM,
+	.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
+	.max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1,
+	.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
+	.rx_max_buf_size = SZ_2K,
+	.multi_irqs = 1,
+	.err_mgmt_irqs = 1,
+	.gptp = 1,
+	.gptp_ref_clk = 1,
+	.nc_queues = 1,
+	.magic_pkt = 1,
+};
+
 static const struct ravb_hw_info gbeth_hw_info = {
 	.rx_ring_free = ravb_rx_ring_free_gbeth,
 	.rx_ring_format = ravb_rx_ring_format_gbeth,
@@ -2487,6 +2512,7 @@ static const struct of_device_id ravb_match_table[] = {
 	{ .compatible = "renesas,etheravb-rcar-gen2", .data = &ravb_gen2_hw_info },
 	{ .compatible = "renesas,etheravb-r8a7795", .data = &ravb_gen3_hw_info },
 	{ .compatible = "renesas,etheravb-rcar-gen3", .data = &ravb_gen3_hw_info },
+	{ .compatible = "renesas,etheravb-rzv2m", .data = &ravb_rzv2m_hw_info },
 	{ .compatible = "renesas,rzg2l-gbeth", .data = &gbeth_hw_info },
 	{ }
 };
-- 
2.32.0

Re: [PATCH v2 5/5] ravb: Add support for RZ/V2M

[Sergey Shtylyov]

On 5/9/22 5:24 PM, Phil Edworthy wrote:

> RZ/V2M Ethernet is very similar to R-Car Gen3 Ethernet-AVB, though
> some small parts are the same as R-Car Gen2.
> Other differences to R-Car Gen3 and Gen2 are:
> * It has separate data (DI), error (Line 1) and management (Line 2) irqs
>   rather than one irq for all three.
> * Instead of using the High-speed peripheral bus clock for gPTP, it has a
>   separate gPTP reference clock.
> 
> Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
> Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>

Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>

[...]

MBR, Sergey