[PATCH net-next v5 9/9] net: stmmac: platform: support parsing per channel irq from DT

Jisheng Zhang
2023-08-17T17:11:02Z

The snps dwmac IP may support per channel interrupt. Add support to
parse the per channel irq from DT.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
---
.../net/ethernet/stmicro/stmmac/stmmac_main.c | 10 ++++----
.../ethernet/stmicro/stmmac/stmmac_platform.c | 23 +++++++++++++++++++
2 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 64c55024d69d..d4a8d7b48ad2 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -3619,7 +3619,7 @@ static int stmmac_request_irq_multi_channel(struct net_device *dev)
for (i = 0; i < priv->plat->rx_queues_to_use; i++) {
if (i >= MTL_MAX_RX_QUEUES)
break;
- if (priv->rx_irq[i] == 0)
+ if (priv->rx_irq[i] <= 0)
continue;

int_name = priv->int_name_rx_irq[i];
@@ -3644,7 +3644,7 @@ static int stmmac_request_irq_multi_channel(struct net_device *dev)
for (i = 0; i < priv->plat->tx_queues_to_use; i++) {
if (i >= MTL_MAX_TX_QUEUES)
break;
- if (priv->tx_irq[i] == 0)
+ if (priv->tx_irq[i] <= 0)
continue;

int_name = priv->int_name_tx_irq[i];
@@ -7300,8 +7300,10 @@ int stmmac_dvr_probe(struct device *device,
priv->plat = plat_dat;
priv->ioaddr = res->addr;
priv->dev->base_addr = (unsigned long)res->addr;
- priv->plat->dma_cfg->perch_irq_en =
- (priv->plat->flags & STMMAC_FLAG_PERCH_IRQ_EN);
+ if (res->rx_irq[0] > 0 && res->tx_irq[0] > 0) {
+ priv->plat->flags |= STMMAC_FLAG_PERCH_IRQ_EN;
+ priv->plat->dma_cfg->perch_irq_en = true;
+ }

priv->dev->irq = res->irq;
priv->wol_irq = res->wol_irq;
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 4a2002eea870..0fb9868aeffc 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -704,6 +704,9 @@ EXPORT_SYMBOL_GPL(stmmac_remove_config_dt);
int stmmac_get_platform_resources(struct platform_device *pdev,
struct stmmac_resources *stmmac_res)
{
+ char irq_name[8];
+ int i;
+
memset(stmmac_res, 0, sizeof(*stmmac_res));

/* Get IRQ information early to have an ability to ask for deferred
@@ -737,6 +740,26 @@ int stmmac_get_platform_resources(struct platform_device *pdev,
dev_info(&pdev->dev, "IRQ eth_lpi not found\n");
}

+ for (i = 0; i < MTL_MAX_RX_QUEUES; i++) {
+ snprintf(irq_name, sizeof(irq_name), "rx%i", i);
+ stmmac_res->rx_irq[i] = platform_get_irq_byname_optional(pdev, irq_name);
+ if (stmmac_res->rx_irq[i] < 0) {
+ if (stmmac_res->rx_irq[i] == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ break;
+ }
+ }
+
+ for (i = 0; i < MTL_MAX_TX_QUEUES; i++) {
+ snprintf(irq_name, sizeof(irq_name), "tx%i", i);
+ stmmac_res->tx_irq[i] = platform_get_irq_byname_optional(pdev, irq_name);
+ if (stmmac_res->tx_irq[i] < 0) {
+ if (stmmac_res->tx_irq[i] == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ break;
+ }
+ }
+
stmmac_res->sfty_ce_irq = platform_get_irq_byname_optional(pdev, "sfty_ce");
if (stmmac_res->sfty_ce_irq < 0) {
if (stmmac_res->sfty_ce_irq == -EPROBE_DEFER)
--
2.40.1