[PATCH net-next 10/10] net: stmmac: platform: support parsing per channel irq from DT

Jisheng Zhang
2023-07-23T16:23:48Z

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>
---
.../ethernet/stmicro/stmmac/stmmac_platform.c | 27 +++++++++++++++++++
1 file changed, 27 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index e1b7a3fefd1a..16fff66c578b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -539,10 +539,14 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
if (of_device_is_compatible(np, "snps,dwxgmac")) {
plat->has_xgmac = 1;
plat->pmt = 1;
+
if (of_property_read_bool(np, "snps,tso"))
plat->flags |= STMMAC_FLAG_TSO_EN;
}

+ if (of_property_read_bool(np, "snps,per-channel-interrupt"))
+ plat->flags |= STMMAC_FLAG_PERCH_IRQ_EN;
+
dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
GFP_KERNEL);
if (!dma_cfg) {
@@ -705,6 +709,9 @@ 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
@@ -738,6 +745,26 @@ 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_irq");
if (stmmac_res->sfty_ce_irq < 0) {
if (stmmac_res->sfty_ce_irq == -EPROBE_DEFER)
--
2.40.1