Merge branch 'net-ravb-prepare-for-suspend-to-ram-and-runtime-pm-support-part-1'

Claudiu Beznea says:

====================
net: ravb: Prepare for suspend to RAM and runtime PM support (part 1)

This series prepares ravb driver for runtime PM support and adjust the
already existing suspend to RAM code to work for RZ/G3S (R9A08G045) SoC.

As there are IP versions that switch to module standby when disabling
the clocks, and because of module standby IP switches to reset and
the register content is lost, to be able to have runtime PM supported
for all IP variants, the configuration operations were moved all to
ravb_open()/ravb_close() letting the ravb_probe() and ravb_remove()
to deal with resource parsing and allocation/free.

The ethtool and IOCTL APIs that could have been run asyncronously
were adapted to return if the interface is down. As explained in
each individual commits description, this should be harmless.

Along with it, the series contains preparatory cleanups.

The series has been tested on the boards with the following device trees:
- r8a7742-iwg21d-q7.dts
- r8a774a1-hihope-rzg2m-ex.dts
- r9a07g043u11-smarc-rzg2ul.dts
- r9a07g054l2-smarc-rzv2l.dts
- r9a07g044l2-smarc-rzg2l.dts

Changes in v6:
- fixed typo in patch 08/15
- re-arranged the tags as my b4 am/shazam placed the Rb tags
  before author's Sob tag

Changes in v5:
- collected tags
- fixed typos in patches description
- improved description for patch 07/15
- collected tags

Changes in v4:
- changed cover letter title and keep on 15 patches in series to cope
  with requirement at [1]
- add dependency on RESET_CONTROLLER in patch "net: ravb: Make reset
  controller support mandatory"
- use pm_runtime_active() in patch "net: ravb: Move the IRQs get and
  request in the probe function"
- set config more before reading the mac address in patch "net: ravb: Set
  config mode in ndo_open and reset mode in ndo_close"
- collected tags

[1] https://www.kernel.org/doc/html/v6.6/process/maintainer-netdev.html#tl-dr

Changes in v3:
- collected tags
- addressed review comments
- squashed patch 17/21 ("net: ravb: Keep clock request operations grouped
  together") from v2 in patch 07/19 ("net: ravb: Move reference clock
  enable/disable on runtime PM APIs") from v3
- check for ndev->flags & IFF_UP in patch 17/19 and 18/19 instead of
  checking netif_running()
- dropped patch 19/21 ("net: ravb: Do not set promiscuous mode if the
  interface is down") as the changes there are not necessary as
  ndev->flags & IFF_UP is already checked at the beginning of
  __dev_set_rx_mode()
- remove code from ravb_open() introduced by patch 20/21
  ("net: ravb: Do not apply RX CSUM settings to hardware if the interface
  is down") from v2 as this is not necessary; driver already takes
  care of this in ravb_emac_init_rcar()

Changes in v2:
- rework the driver (mainly, ravb_open() contains now only resource
  allocation and parsing leaving the settings to ravb_open(); ravb_remove()
  has been adapted accordingly) to be able to use runtime PM for all
  IP variants; due to this number of patches increased
- adjust previous series to review comments
- collected tags
- populated driver's own runtime PM ops with enable/disable of reference
  clock
====================

Link: https://lore.kernel.org/r/20240202084136.3426492-1-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

3 files changed, 352 insertions, 393 deletions

diff --git a/drivers/net/ethernet/renesas/Kconfig b/drivers/net/ethernet/renesas/Kconfig
index d6136fe5c206..b03fae7a0f72 100644
--- a/drivers/net/ethernet/renesas/Kconfig
+++ b/drivers/net/ethernet/renesas/Kconfig
@@ -34,6 +34,7 @@ config RAVB
 	select MII
 	select MDIO_BITBANG
 	select PHYLIB
+	select RESET_CONTROLLER
 	help
 	  Renesas Ethernet AVB device driver.
 
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index e0f8276cffed..268ccfafe7aa 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1089,10 +1089,6 @@ 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];
 
 	unsigned no_avb_link:1;
 	unsigned avb_link_active_low:1;
@@ -1106,6 +1102,8 @@ struct ravb_private {
 
 	const struct ravb_hw_info *info;
 	struct reset_control *rstc;
+
+	u32 gti_tiv;
 };
 
 static inline u32 ravb_read(struct net_device *ndev, enum ravb_reg reg)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 0e3731f50fc2..9521cd054274 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -38,16 +38,6 @@
 		 NETIF_MSG_RX_ERR | \
 		 NETIF_MSG_TX_ERR)
 
-static const char *ravb_rx_irqs[NUM_RX_QUEUE] = {
-	"ch0", /* RAVB_BE */
-	"ch1", /* RAVB_NC */
-};
-
-static const char *ravb_tx_irqs[NUM_TX_QUEUE] = {
-	"ch18", /* RAVB_BE */
-	"ch19", /* RAVB_NC */
-};
-
 void ravb_modify(struct net_device *ndev, enum ravb_reg reg, u32 clear,
 		 u32 set)
 {
@@ -96,13 +86,13 @@ static void ravb_set_rate_gbeth(struct net_device *ndev)
 	struct ravb_private *priv = netdev_priv(ndev);
 
 	switch (priv->speed) {
-	case 10:                /* 10BASE */
+	case 10:		/* 10BASE */
 		ravb_write(ndev, GBETH_GECMR_SPEED_10, GECMR);
 		break;
-	case 100:               /* 100BASE */
+	case 100:		/* 100BASE */
 		ravb_write(ndev, GBETH_GECMR_SPEED_100, GECMR);
 		break;
-	case 1000:              /* 1000BASE */
+	case 1000:		/* 1000BASE */
 		ravb_write(ndev, GBETH_GECMR_SPEED_1000, GECMR);
 		break;
 	}
@@ -1092,11 +1082,23 @@ static irqreturn_t ravb_emac_interrupt(int irq, void *dev_id)
 {
 	struct net_device *ndev = dev_id;
 	struct ravb_private *priv = netdev_priv(ndev);
+	struct device *dev = &priv->pdev->dev;
+	irqreturn_t result = IRQ_HANDLED;
+
+	pm_runtime_get_noresume(dev);
+
+	if (unlikely(!pm_runtime_active(dev))) {
+		result = IRQ_NONE;
+		goto out_rpm_put;
+	}
 
 	spin_lock(&priv->lock);
 	ravb_emac_interrupt_unlocked(ndev);
 	spin_unlock(&priv->lock);
-	return IRQ_HANDLED;
+
+out_rpm_put:
+	pm_runtime_put_noidle(dev);
+	return result;
 }
 
 /* Error interrupt handler */
@@ -1176,9 +1178,15 @@ static irqreturn_t ravb_interrupt(int irq, void *dev_id)
 	struct net_device *ndev = dev_id;
 	struct ravb_private *priv = netdev_priv(ndev);
 	const struct ravb_hw_info *info = priv->info;
+	struct device *dev = &priv->pdev->dev;
 	irqreturn_t result = IRQ_NONE;
 	u32 iss;
 
+	pm_runtime_get_noresume(dev);
+
+	if (unlikely(!pm_runtime_active(dev)))
+		goto out_rpm_put;
+
 	spin_lock(&priv->lock);
 	/* Get interrupt status */
 	iss = ravb_read(ndev, ISS);
@@ -1222,6 +1230,9 @@ static irqreturn_t ravb_interrupt(int irq, void *dev_id)
 	}
 
 	spin_unlock(&priv->lock);
+
+out_rpm_put:
+	pm_runtime_put_noidle(dev);
 	return result;
 }
 
@@ -1230,9 +1241,15 @@ static irqreturn_t ravb_multi_interrupt(int irq, void *dev_id)
 {
 	struct net_device *ndev = dev_id;
 	struct ravb_private *priv = netdev_priv(ndev);
+	struct device *dev = &priv->pdev->dev;
 	irqreturn_t result = IRQ_NONE;
 	u32 iss;
 
+	pm_runtime_get_noresume(dev);
+
+	if (unlikely(!pm_runtime_active(dev)))
+		goto out_rpm_put;
+
 	spin_lock(&priv->lock);
 	/* Get interrupt status */
 	iss = ravb_read(ndev, ISS);
@@ -1254,6 +1271,9 @@ static irqreturn_t ravb_multi_interrupt(int irq, void *dev_id)
 	}
 
 	spin_unlock(&priv->lock);
+
+out_rpm_put:
+	pm_runtime_put_noidle(dev);
 	return result;
 }
 
@@ -1261,8 +1281,14 @@ static irqreturn_t ravb_dma_interrupt(int irq, void *dev_id, int q)
 {
 	struct net_device *ndev = dev_id;
 	struct ravb_private *priv = netdev_priv(ndev);
+	struct device *dev = &priv->pdev->dev;
 	irqreturn_t result = IRQ_NONE;
 
+	pm_runtime_get_noresume(dev);
+
+	if (unlikely(!pm_runtime_active(dev)))
+		goto out_rpm_put;
+
 	spin_lock(&priv->lock);
 
 	/* Network control/Best effort queue RX/TX */
@@ -1270,6 +1296,9 @@ static irqreturn_t ravb_dma_interrupt(int irq, void *dev_id, int q)
 		result = IRQ_HANDLED;
 
 	spin_unlock(&priv->lock);
+
+out_rpm_put:
+	pm_runtime_put_noidle(dev);
 	return result;
 }
 
@@ -1288,25 +1317,16 @@ static int ravb_poll(struct napi_struct *napi, int budget)
 	struct net_device *ndev = napi->dev;
 	struct ravb_private *priv = netdev_priv(ndev);
 	const struct ravb_hw_info *info = priv->info;
-	bool gptp = info->gptp || info->ccc_gac;
-	struct ravb_rx_desc *desc;
 	unsigned long flags;
 	int q = napi - priv->napi;
 	int mask = BIT(q);
 	int quota = budget;
-	unsigned int entry;
 
-	if (!gptp) {
-		entry = priv->cur_rx[q] % priv->num_rx_ring[q];
-		desc = &priv->gbeth_rx_ring[entry];
-	}
 	/* Processing RX Descriptor Ring */
 	/* Clear RX interrupt */
 	ravb_write(ndev, ~(mask | RIS0_RESERVED), RIS0);
-	if (gptp || desc->die_dt != DT_FEMPTY) {
-		if (ravb_rx(ndev, &quota, q))
-			goto out;
-	}
+	if (ravb_rx(ndev, &quota, q))
+		goto out;
 
 	/* Processing TX Descriptor Ring */
 	spin_lock_irqsave(&priv->lock, flags);
@@ -1736,89 +1756,154 @@ static const struct ethtool_ops ravb_ethtool_ops = {
 	.set_wol		= ravb_set_wol,
 };
 
-static inline int ravb_hook_irq(unsigned int irq, irq_handler_t handler,
-				struct net_device *ndev, struct device *dev,
-				const char *ch)
+static int ravb_set_config_mode(struct net_device *ndev)
 {
-	char *name;
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
 	int error;
 
-	name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s", ndev->name, ch);
-	if (!name)
-		return -ENOMEM;
-	error = request_irq(irq, handler, 0, name, ndev);
-	if (error)
-		netdev_err(ndev, "cannot request IRQ %s\n", name);
+	if (info->gptp) {
+		error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
+		if (error)
+			return error;
+		/* Set CSEL value */
+		ravb_modify(ndev, CCC, CCC_CSEL, CCC_CSEL_HPB);
+	} else if (info->ccc_gac) {
+		error = ravb_set_opmode(ndev, CCC_OPC_CONFIG | CCC_GAC | CCC_CSEL_HPB);
+	} else {
+		error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
+	}
 
 	return error;
 }
 
+static void ravb_set_gti(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+
+	if (!(info->gptp || info->ccc_gac))
+		return;
+
+	ravb_write(ndev, priv->gti_tiv, GTI);
+
+	/* Request GTI loading */
+	ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
+}
+
+static int ravb_compute_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;
+	u64 inc;
+
+	if (!(info->gptp || info->ccc_gac))
+		return 0;
+
+	if (info->gptp_ref_clk)
+		rate = clk_get_rate(priv->gptp_clk);
+	else
+		rate = clk_get_rate(priv->clk);
+	if (!rate)
+		return -EINVAL;
+
+	inc = div64_ul(1000000000ULL << 20, rate);
+
+	if (inc < GTI_TIV_MIN || inc > GTI_TIV_MAX) {
+		dev_err(dev, "gti.tiv increment 0x%llx is outside the range 0x%x - 0x%x\n",
+			inc, GTI_TIV_MIN, GTI_TIV_MAX);
+		return -EINVAL;
+	}
+	priv->gti_tiv = inc;
+
+	return 0;
+}
+
+/* Set tx and rx clock internal delay modes */
+static void ravb_parse_delay_mode(struct device_node *np, struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	bool explicit_delay = false;
+	u32 delay;
+
+	if (!priv->info->internal_delay)
+		return;
+
+	if (!of_property_read_u32(np, "rx-internal-delay-ps", &delay)) {
+		/* Valid values are 0 and 1800, according to DT bindings */
+		priv->rxcidm = !!delay;
+		explicit_delay = true;
+	}
+	if (!of_property_read_u32(np, "tx-internal-delay-ps", &delay)) {
+		/* Valid values are 0 and 2000, according to DT bindings */
+		priv->txcidm = !!delay;
+		explicit_delay = true;
+	}
+
+	if (explicit_delay)
+		return;
+
+	/* Fall back to legacy rgmii-*id behavior */
+	if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
+	    priv->phy_interface == PHY_INTERFACE_MODE_RGMII_RXID) {
+		priv->rxcidm = 1;
+		priv->rgmii_override = 1;
+	}
+
+	if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
+	    priv->phy_interface == PHY_INTERFACE_MODE_RGMII_TXID) {
+		priv->txcidm = 1;
+		priv->rgmii_override = 1;
+	}
+}
+
+static void ravb_set_delay_mode(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	u32 set = 0;
+
+	if (!priv->info->internal_delay)
+		return;
+
+	if (priv->rxcidm)
+		set |= APSR_RDM;
+	if (priv->txcidm)
+		set |= APSR_TDM;
+	ravb_modify(ndev, APSR, APSR_RDM | APSR_TDM, set);
+}
+
 /* Network device open function for Ethernet AVB */
 static int ravb_open(struct net_device *ndev)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
 	const struct ravb_hw_info *info = priv->info;
-	struct platform_device *pdev = priv->pdev;
-	struct device *dev = &pdev->dev;
 	int error;
 
 	napi_enable(&priv->napi[RAVB_BE]);
 	if (info->nc_queues)
 		napi_enable(&priv->napi[RAVB_NC]);
 
-	if (!info->multi_irqs) {
-		error = request_irq(ndev->irq, ravb_interrupt, IRQF_SHARED,
-				    ndev->name, ndev);
-		if (error) {
-			netdev_err(ndev, "cannot request IRQ\n");
-			goto out_napi_off;
-		}
-	} else {
-		error = ravb_hook_irq(ndev->irq, ravb_multi_interrupt, ndev,
-				      dev, "ch22:multi");
-		if (error)
-			goto out_napi_off;
-		error = ravb_hook_irq(priv->emac_irq, ravb_emac_interrupt, ndev,
-				      dev, "ch24:emac");
-		if (error)
-			goto out_free_irq;
-		error = ravb_hook_irq(priv->rx_irqs[RAVB_BE], ravb_be_interrupt,
-				      ndev, dev, "ch0:rx_be");
-		if (error)
-			goto out_free_irq_emac;
-		error = ravb_hook_irq(priv->tx_irqs[RAVB_BE], ravb_be_interrupt,
-				      ndev, dev, "ch18:tx_be");
-		if (error)
-			goto out_free_irq_be_rx;
-		error = ravb_hook_irq(priv->rx_irqs[RAVB_NC], ravb_nc_interrupt,
-				      ndev, dev, "ch1:rx_nc");
-		if (error)
-			goto out_free_irq_be_tx;
-		error = ravb_hook_irq(priv->tx_irqs[RAVB_NC], ravb_nc_interrupt,
-				      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;
-		}
-	}
+	/* Set AVB config mode */
+	error = ravb_set_config_mode(ndev);
+	if (error)
+		goto out_napi_off;
+
+	ravb_set_delay_mode(ndev);
+	ravb_write(ndev, priv->desc_bat_dma, DBAT);
 
 	/* Device init */
 	error = ravb_dmac_init(ndev);
 	if (error)
-		goto out_free_irq_mgmta;
+		goto out_set_reset;
+
 	ravb_emac_init(ndev);
 
+	ravb_set_gti(ndev);
+
 	/* Initialise PTP Clock driver */
-	if (info->gptp)
+	if (info->gptp || info->ccc_gac)
 		ravb_ptp_init(ndev, priv->pdev);
 
 	/* PHY control start */
@@ -1832,29 +1917,11 @@ static int ravb_open(struct net_device *ndev)
 
 out_ptp_stop:
 	/* Stop PTP Clock driver */
-	if (info->gptp)
+	if (info->gptp || info->ccc_gac)
 		ravb_ptp_stop(ndev);
 	ravb_stop_dma(ndev);
-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);
-out_free_irq_be_tx:
-	free_irq(priv->tx_irqs[RAVB_BE], ndev);
-out_free_irq_be_rx:
-	free_irq(priv->rx_irqs[RAVB_BE], ndev);
-out_free_irq_emac:
-	free_irq(priv->emac_irq, ndev);
-out_free_irq:
-	free_irq(ndev->irq, ndev);
+out_set_reset:
+	ravb_set_opmode(ndev, CCC_OPC_RESET);
 out_napi_off:
 	if (info->nc_queues)
 		napi_disable(&priv->napi[RAVB_NC]);
@@ -2162,7 +2229,7 @@ static int ravb_close(struct net_device *ndev)
 	ravb_write(ndev, 0, TIC);
 
 	/* Stop PTP Clock driver */
-	if (info->gptp)
+	if (info->gptp || info->ccc_gac)
 		ravb_ptp_stop(ndev);
 
 	/* Set the config mode to stop the AVB-DMAC's processes */
@@ -2189,19 +2256,6 @@ static int ravb_close(struct net_device *ndev)
 
 	cancel_work_sync(&priv->work);
 
-	if (info->multi_irqs) {
-		free_irq(priv->tx_irqs[RAVB_NC], ndev);
-		free_irq(priv->rx_irqs[RAVB_NC], 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);
-
 	if (info->nc_queues)
 		napi_disable(&priv->napi[RAVB_NC]);
 	napi_disable(&priv->napi[RAVB_BE]);
@@ -2211,7 +2265,8 @@ static int ravb_close(struct net_device *ndev)
 	if (info->nc_queues)
 		ravb_ring_free(ndev, RAVB_NC);
 
-	return 0;
+	/* Set reset mode. */
+	return ravb_set_opmode(ndev, CCC_OPC_RESET);
 }
 
 static int ravb_hwtstamp_get(struct net_device *ndev, struct ifreq *req)
@@ -2541,100 +2596,88 @@ static const struct of_device_id ravb_match_table[] = {
 };
 MODULE_DEVICE_TABLE(of, ravb_match_table);
 
-static int ravb_set_gti(struct net_device *ndev)
+static int ravb_setup_irq(struct ravb_private *priv, const char *irq_name,
+			  const char *ch, int *irq, irq_handler_t handler)
 {
-	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;
-
-	if (info->gptp_ref_clk)
-		rate = clk_get_rate(priv->gptp_clk);
-	else
-		rate = clk_get_rate(priv->clk);
-	if (!rate)
-		return -EINVAL;
+	struct platform_device *pdev = priv->pdev;
+	struct net_device *ndev = priv->ndev;
+	struct device *dev = &pdev->dev;
+	const char *dev_name;
+	unsigned long flags;
+	int error;
 
-	inc = div64_ul(1000000000ULL << 20, rate);
+	if (irq_name) {
+		dev_name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s", ndev->name, ch);
+		if (!dev_name)
+			return -ENOMEM;
 
-	if (inc < GTI_TIV_MIN || inc > GTI_TIV_MAX) {
-		dev_err(dev, "gti.tiv increment 0x%llx is outside the range 0x%x - 0x%x\n",
-			inc, GTI_TIV_MIN, GTI_TIV_MAX);
-		return -EINVAL;
+		*irq = platform_get_irq_byname(pdev, irq_name);
+		flags = 0;
+	} else {
+		dev_name = ndev->name;
+		*irq = platform_get_irq(pdev, 0);
+		flags = IRQF_SHARED;
 	}
+	if (*irq < 0)
+		return *irq;
 
-	ravb_write(ndev, inc, GTI);
+	error = devm_request_irq(dev, *irq, handler, flags, dev_name, ndev);
+	if (error)
+		netdev_err(ndev, "cannot request IRQ %s\n", dev_name);
 
-	return 0;
+	return error;
 }
 
-static int ravb_set_config_mode(struct net_device *ndev)
+static int ravb_setup_irqs(struct ravb_private *priv)
 {
-	struct ravb_private *priv = netdev_priv(ndev);
 	const struct ravb_hw_info *info = priv->info;
-	int error;
+	struct net_device *ndev = priv->ndev;
+	const char *irq_name, *emac_irq_name;
+	int error, irq;
 
-	if (info->gptp) {
-		error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
-		if (error)
-			return error;
-		/* Set CSEL value */
-		ravb_modify(ndev, CCC, CCC_CSEL, CCC_CSEL_HPB);
-	} else if (info->ccc_gac) {
-		error = ravb_set_opmode(ndev, CCC_OPC_CONFIG | CCC_GAC | CCC_CSEL_HPB);
+	if (!info->multi_irqs)
+		return ravb_setup_irq(priv, NULL, NULL, &ndev->irq, ravb_interrupt);
+
+	if (info->err_mgmt_irqs) {
+		irq_name = "dia";
+		emac_irq_name = "line3";
 	} else {
-		error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
+		irq_name = "ch22";
+		emac_irq_name = "ch24";
 	}
 
-	return error;
-}
-
-/* Set tx and rx clock internal delay modes */
-static void ravb_parse_delay_mode(struct device_node *np, struct net_device *ndev)
-{
-	struct ravb_private *priv = netdev_priv(ndev);
-	bool explicit_delay = false;
-	u32 delay;
+	error = ravb_setup_irq(priv, irq_name, "ch22:multi", &ndev->irq, ravb_multi_interrupt);
+	if (error)
+		return error;
 
-	if (!of_property_read_u32(np, "rx-internal-delay-ps", &delay)) {
-		/* Valid values are 0 and 1800, according to DT bindings */
-		priv->rxcidm = !!delay;
-		explicit_delay = true;
-	}
-	if (!of_property_read_u32(np, "tx-internal-delay-ps", &delay)) {
-		/* Valid values are 0 and 2000, according to DT bindings */
-		priv->txcidm = !!delay;
-		explicit_delay = true;
-	}
+	error = ravb_setup_irq(priv, emac_irq_name, "ch24:emac", &priv->emac_irq,
+			       ravb_emac_interrupt);
+	if (error)
+		return error;
 
-	if (explicit_delay)
-		return;
+	if (info->err_mgmt_irqs) {
+		error = ravb_setup_irq(priv, "err_a", "err_a", &irq, ravb_multi_interrupt);
+		if (error)
+			return error;
 
-	/* Fall back to legacy rgmii-*id behavior */
-	if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
-	    priv->phy_interface == PHY_INTERFACE_MODE_RGMII_RXID) {
-		priv->rxcidm = 1;
-		priv->rgmii_override = 1;
+		error = ravb_setup_irq(priv, "mgmt_a", "mgmt_a", &irq, ravb_multi_interrupt);
+		if (error)
+			return error;
 	}
 
-	if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
-	    priv->phy_interface == PHY_INTERFACE_MODE_RGMII_TXID) {
-		priv->txcidm = 1;
-		priv->rgmii_override = 1;
-	}
-}
+	error = ravb_setup_irq(priv, "ch0", "ch0:rx_be", &irq, ravb_be_interrupt);
+	if (error)
+		return error;
 
-static void ravb_set_delay_mode(struct net_device *ndev)
-{
-	struct ravb_private *priv = netdev_priv(ndev);
-	u32 set = 0;
+	error = ravb_setup_irq(priv, "ch1", "ch1:rx_nc", &irq, ravb_nc_interrupt);
+	if (error)
+		return error;
 
-	if (priv->rxcidm)
-		set |= APSR_RDM;
-	if (priv->txcidm)
-		set |= APSR_TDM;
-	ravb_modify(ndev, APSR, APSR_RDM | APSR_TDM, set);
+	error = ravb_setup_irq(priv, "ch18", "ch18:tx_be", &irq, ravb_be_interrupt);
+	if (error)
+		return error;
+
+	return ravb_setup_irq(priv, "ch19", "ch19:tx_nc", &irq, ravb_nc_interrupt);
 }
 
 static int ravb_probe(struct platform_device *pdev)
@@ -2644,9 +2687,8 @@ static int ravb_probe(struct platform_device *pdev)
 	struct reset_control *rstc;
 	struct ravb_private *priv;
 	struct net_device *ndev;
-	int error, irq, q;
 	struct resource *res;
-	int i;
+	int error, q;
 
 	if (!np) {
 		dev_err(&pdev->dev,
@@ -2654,7 +2696,7 @@ static int ravb_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	rstc = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL);
+	rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
 	if (IS_ERR(rstc))
 		return dev_err_probe(&pdev->dev, PTR_ERR(rstc),
 				     "failed to get cpg reset\n");
@@ -2673,25 +2715,6 @@ static int ravb_probe(struct platform_device *pdev)
 	if (error)
 		goto out_free_netdev;
 
-	pm_runtime_enable(&pdev->dev);
-	error = pm_runtime_resume_and_get(&pdev->dev);
-	if (error < 0)
-		goto out_rpm_disable;
-
-	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;
-	}
-	ndev->irq = irq;
-
 	SET_NETDEV_DEV(ndev, &pdev->dev);
 
 	priv = netdev_priv(ndev);
@@ -2706,10 +2729,41 @@ static int ravb_probe(struct platform_device *pdev)
 		priv->num_rx_ring[RAVB_NC] = NC_RX_RING_SIZE;
 	}
 
+	error = ravb_setup_irqs(priv);
+	if (error)
+		goto out_reset_assert;
+
+	priv->clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(priv->clk)) {
+		error = PTR_ERR(priv->clk);
+		goto out_reset_assert;
+	}
+
+	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_reset_assert;
+		}
+	}
+
+	priv->refclk = devm_clk_get_optional(&pdev->dev, "refclk");
+	if (IS_ERR(priv->refclk)) {
+		error = PTR_ERR(priv->refclk);
+		goto out_reset_assert;
+	}
+	clk_prepare(priv->refclk);
+
+	platform_set_drvdata(pdev, ndev);
+	pm_runtime_enable(&pdev->dev);
+	error = pm_runtime_resume_and_get(&pdev->dev);
+	if (error < 0)
+		goto out_rpm_disable;
+
 	priv->addr = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
 	if (IS_ERR(priv->addr)) {
 		error = PTR_ERR(priv->addr);
-		goto out_release;
+		goto out_rpm_put;
 	}
 
 	/* The Ether-specific entries in the device structure. */
@@ -2720,78 +2774,12 @@ static int ravb_probe(struct platform_device *pdev)
 
 	error = of_get_phy_mode(np, &priv->phy_interface);
 	if (error && error != -ENODEV)
-		goto out_release;
+		goto out_rpm_put;
 
 	priv->no_avb_link = of_property_read_bool(np, "renesas,no-ether-link");
 	priv->avb_link_active_low =
 		of_property_read_bool(np, "renesas,ether-link-active-low");
 
-	if (info->multi_irqs) {
-		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;
-		}
-		priv->emac_irq = irq;
-		for (i = 0; i < NUM_RX_QUEUE; i++) {
-			irq = platform_get_irq_byname(pdev, ravb_rx_irqs[i]);
-			if (irq < 0) {
-				error = irq;
-				goto out_release;
-			}
-			priv->rx_irqs[i] = irq;
-		}
-		for (i = 0; i < NUM_TX_QUEUE; i++) {
-			irq = platform_get_irq_byname(pdev, ravb_tx_irqs[i]);
-			if (irq < 0) {
-				error = irq;
-				goto out_release;
-			}
-			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);
-	if (IS_ERR(priv->clk)) {
-		error = PTR_ERR(priv->clk);
-		goto out_release;
-	}
-
-	priv->refclk = devm_clk_get_optional(&pdev->dev, "refclk");
-	if (IS_ERR(priv->refclk)) {
-		error = PTR_ERR(priv->refclk);
-		goto out_release;
-	}
-	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_disable_refclk;
-		}
-		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;
 
@@ -2806,25 +2794,11 @@ static int ravb_probe(struct platform_device *pdev)
 	ndev->netdev_ops = &ravb_netdev_ops;
 	ndev->ethtool_ops = &ravb_ethtool_ops;
 
-	/* Set AVB config mode */
-	error = ravb_set_config_mode(ndev);
+	error = ravb_compute_gti(ndev);
 	if (error)
-		goto out_disable_gptp_clk;
+		goto out_rpm_put;
 
-	if (info->gptp || info->ccc_gac) {
-		/* Set GTI value */
-		error = ravb_set_gti(ndev);
-		if (error)
-			goto out_disable_gptp_clk;
-
-		/* Request GTI loading */
-		ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
-	}
-
-	if (info->internal_delay) {
-		ravb_parse_delay_mode(np, ndev);
-		ravb_set_delay_mode(ndev);
-	}
+	ravb_parse_delay_mode(np, ndev);
 
 	/* Allocate descriptor base address table */
 	priv->desc_bat_size = sizeof(struct ravb_desc) * DBAT_ENTRY_NUM;
@@ -2835,22 +2809,22 @@ static int ravb_probe(struct platform_device *pdev)
 			"Cannot allocate desc base address table (size %d bytes)\n",
 			priv->desc_bat_size);
 		error = -ENOMEM;
-		goto out_disable_gptp_clk;
+		goto out_rpm_put;
 	}
 	for (q = RAVB_BE; q < DBAT_ENTRY_NUM; q++)
 		priv->desc_bat[q].die_dt = DT_EOS;
-	ravb_write(ndev, priv->desc_bat_dma, DBAT);
 
 	/* Initialise HW timestamp list */
 	INIT_LIST_HEAD(&priv->ts_skb_list);
 
-	/* Initialise PTP Clock driver */
-	if (info->ccc_gac)
-		ravb_ptp_init(ndev, pdev);
-
 	/* Debug message level */
 	priv->msg_enable = RAVB_DEF_MSG_ENABLE;
 
+	/* Set config mode as this is needed for PHY initialization. */
+	error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
+	if (error)
+		goto out_rpm_put;
+
 	/* Read and set MAC address */
 	ravb_read_mac_address(np, ndev);
 	if (!is_valid_ether_addr(ndev->dev_addr)) {
@@ -2863,9 +2837,14 @@ static int ravb_probe(struct platform_device *pdev)
 	error = ravb_mdio_init(priv);
 	if (error) {
 		dev_err(&pdev->dev, "failed to initialize MDIO\n");
-		goto out_dma_free;
+		goto out_reset_mode;
 	}
 
+	/* Undo previous switch to config opmode. */
+	error = ravb_set_opmode(ndev, CCC_OPC_RESET);
+	if (error)
+		goto out_mdio_release;
+
 	netif_napi_add(ndev, &priv->napi[RAVB_BE], ravb_poll);
 	if (info->nc_queues)
 		netif_napi_add(ndev, &priv->napi[RAVB_NC], ravb_poll);
@@ -2881,8 +2860,6 @@ static int ravb_probe(struct platform_device *pdev)
 	netdev_info(ndev, "Base address at %#x, %pM, IRQ %d.\n",
 		    (u32)ndev->base_addr, ndev->dev_addr, ndev->irq);
 
-	platform_set_drvdata(pdev, ndev);
-
 	return 0;
 
 out_napi_del:
@@ -2890,22 +2867,18 @@ out_napi_del:
 		netif_napi_del(&priv->napi[RAVB_NC]);
 
 	netif_napi_del(&priv->napi[RAVB_BE]);
+out_mdio_release:
 	ravb_mdio_release(priv);
-out_dma_free:
+out_reset_mode:
+	ravb_set_opmode(ndev, CCC_OPC_RESET);
 	dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
 			  priv->desc_bat_dma);
-
-	/* Stop PTP Clock driver */
-	if (info->ccc_gac)
-		ravb_ptp_stop(ndev);
-out_disable_gptp_clk:
-	clk_disable_unprepare(priv->gptp_clk);
-out_disable_refclk:
-	clk_disable_unprepare(priv->refclk);
-out_release:
+out_rpm_put:
 	pm_runtime_put(&pdev->dev);
 out_rpm_disable:
 	pm_runtime_disable(&pdev->dev);
+	clk_unprepare(priv->refclk);
+out_reset_assert:
 	reset_control_assert(rstc);
 out_free_netdev:
 	free_netdev(ndev);
@@ -2925,20 +2898,12 @@ static void ravb_remove(struct platform_device *pdev)
 
 	ravb_mdio_release(priv);
 
-	/* Stop PTP Clock driver */
-	if (info->ccc_gac)
-		ravb_ptp_stop(ndev);
-
 	dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
 			  priv->desc_bat_dma);
 
-	ravb_set_opmode(ndev, CCC_OPC_RESET);
-
-	clk_disable_unprepare(priv->gptp_clk);
-	clk_disable_unprepare(priv->refclk);
-
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
+	clk_unprepare(priv->refclk);
 	reset_control_assert(priv->rstc);
 	free_netdev(ndev);
 	platform_set_drvdata(pdev, NULL);
@@ -2964,6 +2929,9 @@ static int ravb_wol_setup(struct net_device *ndev)
 	/* Enable MagicPacket */
 	ravb_modify(ndev, ECMR, ECMR_MPDE, ECMR_MPDE);
 
+	if (priv->info->ccc_gac)
+		ravb_ptp_stop(ndev);
+
 	return enable_irq_wake(priv->emac_irq);
 }
 
@@ -2971,6 +2939,20 @@ static int ravb_wol_restore(struct net_device *ndev)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
 	const struct ravb_hw_info *info = priv->info;
+	int error;
+
+	/* Set reset mode to rearm the WoL logic. */
+	error = ravb_set_opmode(ndev, CCC_OPC_RESET);
+	if (error)
+		return error;
+
+	/* Set AVB config mode. */
+	error = ravb_set_config_mode(ndev);
+	if (error)
+		return error;
+
+	if (priv->info->ccc_gac)
+		ravb_ptp_init(ndev, priv->pdev);
 
 	if (info->nc_queues)
 		napi_enable(&priv->napi[RAVB_NC]);
@@ -2984,102 +2966,80 @@ static int ravb_wol_restore(struct net_device *ndev)
 	return disable_irq_wake(priv->emac_irq);
 }
 
-static int __maybe_unused ravb_suspend(struct device *dev)
+static int ravb_suspend(struct device *dev)
 {
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct ravb_private *priv = netdev_priv(ndev);
 	int ret;
 
 	if (!netif_running(ndev))
-		return 0;
+		goto reset_assert;
 
 	netif_device_detach(ndev);
 
 	if (priv->wol_enabled)
-		ret = ravb_wol_setup(ndev);
-	else
-		ret = ravb_close(ndev);
+		return ravb_wol_setup(ndev);
 
-	if (priv->info->ccc_gac)
-		ravb_ptp_stop(ndev);
+	ret = ravb_close(ndev);
+	if (ret)
+		return ret;
 
-	return ret;
+reset_assert:
+	return reset_control_assert(priv->rstc);
 }
 
-static int __maybe_unused ravb_resume(struct device *dev)
+static int ravb_resume(struct device *dev)
 {
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct ravb_private *priv = netdev_priv(ndev);
-	const struct ravb_hw_info *info = priv->info;
-	int ret = 0;
-
-	/* If WoL is enabled set reset mode to rearm the WoL logic */
-	if (priv->wol_enabled) {
-		ret = ravb_set_opmode(ndev, CCC_OPC_RESET);
-		if (ret)
-			return ret;
-	}
-
-	/* All register have been reset to default values.
-	 * Restore all registers which where setup at probe time and
-	 * reopen device if it was running before system suspended.
-	 */
+	int ret;
 
-	/* Set AVB config mode */
-	ret = ravb_set_config_mode(ndev);
+	ret = reset_control_deassert(priv->rstc);
 	if (ret)
 		return ret;
 
-	if (info->gptp || info->ccc_gac) {
-		/* Set GTI value */
-		ret = ravb_set_gti(ndev);
+	if (!netif_running(ndev))
+		return 0;
+
+	/* If WoL is enabled restore the interface. */
+	if (priv->wol_enabled) {
+		ret = ravb_wol_restore(ndev);
 		if (ret)
 			return ret;
-
-		/* Request GTI loading */
-		ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
 	}
 
-	if (info->internal_delay)
-		ravb_set_delay_mode(ndev);
+	/* Reopening the interface will restore the device to the working state. */
+	ret = ravb_open(ndev);
+	if (ret < 0)
+		return ret;
 
-	/* Restore descriptor base address table */
-	ravb_write(ndev, priv->desc_bat_dma, DBAT);
-
-	if (priv->info->ccc_gac)
-		ravb_ptp_init(ndev, priv->pdev);
-
-	if (netif_running(ndev)) {
-		if (priv->wol_enabled) {
-			ret = ravb_wol_restore(ndev);
-			if (ret)
-				return ret;
-		}
-		ret = ravb_open(ndev);
-		if (ret < 0)
-			return ret;
-		ravb_set_rx_mode(ndev);
-		netif_device_attach(ndev);
-	}
+	ravb_set_rx_mode(ndev);
+	netif_device_attach(ndev);
 
 	return ret;
 }
 
-static int __maybe_unused ravb_runtime_nop(struct device *dev)
+static int ravb_runtime_suspend(struct device *dev)
 {
-	/* Runtime PM callback shared between ->runtime_suspend()
-	 * and ->runtime_resume(). Simply returns success.
-	 *
-	 * This driver re-initializes all registers after
-	 * pm_runtime_get_sync() anyway so there is no need
-	 * to save and restore registers here.
-	 */
+	struct net_device *ndev = dev_get_drvdata(dev);
+	struct ravb_private *priv = netdev_priv(ndev);
+
+	clk_disable(priv->refclk);
+
 	return 0;
 }
 
+static int ravb_runtime_resume(struct device *dev)
+{
+	struct net_device *ndev = dev_get_drvdata(dev);
+	struct ravb_private *priv = netdev_priv(ndev);
+
+	return clk_enable(priv->refclk);
+}
+
 static const struct dev_pm_ops ravb_dev_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(ravb_suspend, ravb_resume)
-	SET_RUNTIME_PM_OPS(ravb_runtime_nop, ravb_runtime_nop, NULL)
+	SYSTEM_SLEEP_PM_OPS(ravb_suspend, ravb_resume)
+	RUNTIME_PM_OPS(ravb_runtime_suspend, ravb_runtime_resume, NULL)
 };
 
 static struct platform_driver ravb_driver = {
@@ -3087,7 +3047,7 @@ static struct platform_driver ravb_driver = {
 	.remove_new	= ravb_remove,
 	.driver = {
 		.name	= "ravb",
-		.pm	= &ravb_dev_pm_ops,
+		.pm	= pm_ptr(&ravb_dev_pm_ops),
 		.of_match_table = ravb_match_table,
 	},
 };