netdev - [PATCH 2/2] net: dwmac_socfpga: use the standard "ahb" reset

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Message-Id: <20230710211313.567761-2-dinguyen@kernel.org>
Date: Mon, 10 Jul 2023 16:13:13 -0500
From: Dinh Nguyen <dinguyen@...nel.org>
To: netdev@...r.kernel.org
Cc: dinguyen@...nel.org,
	kuba@...nel.org,
	davem@...emloft.net,
	edumazet@...gle.com,
	joabreu@...opsys.com,
	pabeni@...hat.com,
	robh+dt@...nel.org,
	krzysztof.kozlowskii+dt@...aro.org,
	conor+dt@...nel.org,
	devicetree@...r.kernel.org
Subject: [PATCH 2/2] net: dwmac_socfpga: use the standard "ahb" reset

The "stmmaceth-ocp" reset line of stmmac controller on the SoCFPGA
platform is essentially the "ahb" reset on the standard stmmac controller.

Because of commit ("e67f325e9cd6 net: stmmac: explicitly deassert
GMAC_AHB_RESET") adds the support for getting the 'ahb' reset, the
SoCFPGA dwmac driver no longer need to get the stmmaceth-ocp reset.

Signed-off-by: Dinh Nguyen <dinguyen@...nel.org>
---
 .../ethernet/stmicro/stmmac/dwmac-socfpga.c   | 20 ++++++-------------
 1 file changed, 6 insertions(+), 14 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
index 6267bcb60206..a4b8b86129f4 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
@@ -52,7 +52,7 @@ struct socfpga_dwmac {
 	struct	device *dev;
 	struct regmap *sys_mgr_base_addr;
 	struct reset_control *stmmac_rst;
-	struct reset_control *stmmac_ocp_rst;
+	struct reset_control *stmmac_ahb_rst;
 	void __iomem *splitter_base;
 	void __iomem *tse_pcs_base;
 	void __iomem *sgmii_adapter_base;
@@ -290,7 +290,7 @@ static int socfpga_gen5_set_phy_mode(struct socfpga_dwmac *dwmac)
 		val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII;
 
 	/* Assert reset to the enet controller before changing the phy mode */
-	reset_control_assert(dwmac->stmmac_ocp_rst);
+	reset_control_assert(dwmac->stmmac_ahb_rst);
 	reset_control_assert(dwmac->stmmac_rst);
 
 	regmap_read(sys_mgr_base_addr, reg_offset, &ctrl);
@@ -319,7 +319,7 @@ static int socfpga_gen5_set_phy_mode(struct socfpga_dwmac *dwmac)
 	/* Deassert reset for the phy configuration to be sampled by
 	 * the enet controller, and operation to start in requested mode
 	 */
-	reset_control_deassert(dwmac->stmmac_ocp_rst);
+	reset_control_deassert(dwmac->stmmac_ahb_rst);
 	reset_control_deassert(dwmac->stmmac_rst);
 	if (phymode == PHY_INTERFACE_MODE_SGMII)
 		socfpga_sgmii_config(dwmac, true);
@@ -346,7 +346,7 @@ static int socfpga_gen10_set_phy_mode(struct socfpga_dwmac *dwmac)
 		val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII;
 
 	/* Assert reset to the enet controller before changing the phy mode */
-	reset_control_assert(dwmac->stmmac_ocp_rst);
+	reset_control_assert(dwmac->stmmac_ahb_rst);
 	reset_control_assert(dwmac->stmmac_rst);
 
 	regmap_read(sys_mgr_base_addr, reg_offset, &ctrl);
@@ -372,7 +372,7 @@ static int socfpga_gen10_set_phy_mode(struct socfpga_dwmac *dwmac)
 	/* Deassert reset for the phy configuration to be sampled by
 	 * the enet controller, and operation to start in requested mode
 	 */
-	reset_control_deassert(dwmac->stmmac_ocp_rst);
+	reset_control_deassert(dwmac->stmmac_ahb_rst);
 	reset_control_deassert(dwmac->stmmac_rst);
 	if (phymode == PHY_INTERFACE_MODE_SGMII)
 		socfpga_sgmii_config(dwmac, true);
@@ -410,15 +410,6 @@ static int socfpga_dwmac_probe(struct platform_device *pdev)
 		goto err_remove_config_dt;
 	}
 
-	dwmac->stmmac_ocp_rst = devm_reset_control_get_optional(dev, "stmmaceth-ocp");
-	if (IS_ERR(dwmac->stmmac_ocp_rst)) {
-		ret = PTR_ERR(dwmac->stmmac_ocp_rst);
-		dev_err(dev, "error getting reset control of ocp %d\n", ret);
-		goto err_remove_config_dt;
-	}
-
-	reset_control_deassert(dwmac->stmmac_ocp_rst);
-
 	ret = socfpga_dwmac_parse_data(dwmac, dev);
 	if (ret) {
 		dev_err(dev, "Unable to parse OF data\n");
@@ -441,6 +432,7 @@ static int socfpga_dwmac_probe(struct platform_device *pdev)
 	 * the driver later.
 	 */
 	dwmac->stmmac_rst = stpriv->plat->stmmac_rst;
+	dwmac->stmmac_ahb_rst = stpriv->plat->stmmac_ahb_rst;
 
 	ret = ops->set_phy_mode(dwmac);
 	if (ret)
-- 
2.25.1