linux-kernel - [PATCH v2 5/8] net: mvneta: Add support for 98DX2530 Ethernet port

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Date:   Tue, 15 Mar 2022 10:31:40 +1300
From:   Chris Packham <chris.packham@...iedtelesis.co.nz>
To:     huziji@...vell.com, ulf.hansson@...aro.org, robh+dt@...nel.org,
        davem@...emloft.net, kuba@...nel.org, linus.walleij@...aro.org,
        catalin.marinas@....com, will@...nel.org, andrew@...n.ch,
        gregory.clement@...tlin.com, sebastian.hesselbarth@...il.com,
        adrian.hunter@...el.com, thomas.petazzoni@...tlin.com,
        kostap@...vell.com, robert.marko@...tura.hr
Cc:     linux-mmc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Chris Packham <chris.packham@...iedtelesis.co.nz>
Subject: [PATCH v2 5/8] net: mvneta: Add support for 98DX2530 Ethernet port

The 98DX2530 SoC is similar to the Armada 3700 except it needs a
different MBUS window configuration. Add a new compatible string to
identify this device and the required MBUS window configuration.

Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
---

Notes:
    Changes in v2:
    - New

 drivers/net/ethernet/marvell/mvneta.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 83c8908f0cc7..000929794266 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -76,6 +76,8 @@
 #define MVNETA_WIN_SIZE(w)                      (0x2204 + ((w) << 3))
 #define MVNETA_WIN_REMAP(w)                     (0x2280 + ((w) << 2))
 #define MVNETA_BASE_ADDR_ENABLE                 0x2290
+#define      MVNETA_AC5_CNM_DDR_TARGET		0x2
+#define      MVNETA_AC5_CNM_DDR_ATTR		0xb
 #define MVNETA_ACCESS_PROTECT_ENABLE            0x2294
 #define MVNETA_PORT_CONFIG                      0x2400
 #define      MVNETA_UNI_PROMISC_MODE            BIT(0)
@@ -544,6 +546,7 @@ struct mvneta_port {
 
 	/* Flags for special SoC configurations */
 	bool neta_armada3700;
+	bool neta_ac5;
 	u16 rx_offset_correction;
 	const struct mbus_dram_target_info *dram_target_info;
 };
@@ -5272,6 +5275,10 @@ static void mvneta_conf_mbus_windows(struct mvneta_port *pp,
 			win_protect |= 3 << (2 * i);
 		}
 	} else {
+		if (pp->neta_ac5)
+			mvreg_write(pp, MVNETA_WIN_BASE(0),
+				    (MVNETA_AC5_CNM_DDR_ATTR << 8) |
+				    MVNETA_AC5_CNM_DDR_TARGET);
 		/* For Armada3700 open default 4GB Mbus window, leaving
 		 * arbitration of target/attribute to a different layer
 		 * of configuration.
@@ -5397,6 +5404,11 @@ static int mvneta_probe(struct platform_device *pdev)
 	/* Get special SoC configurations */
 	if (of_device_is_compatible(dn, "marvell,armada-3700-neta"))
 		pp->neta_armada3700 = true;
+	if (of_device_is_compatible(dn, "marvell,armada-ac5-neta")) {
+		pp->neta_armada3700 = true;
+		pp->neta_ac5 = true;
+	}
+
 
 	pp->clk = devm_clk_get(&pdev->dev, "core");
 	if (IS_ERR(pp->clk))
@@ -5720,6 +5732,7 @@ static const struct of_device_id mvneta_match[] = {
 	{ .compatible = "marvell,armada-370-neta" },
 	{ .compatible = "marvell,armada-xp-neta" },
 	{ .compatible = "marvell,armada-3700-neta" },
+	{ .compatible = "marvell,armada-ac5-neta" },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, mvneta_match);
-- 
2.35.1