netdev - [PATCH net-next v4 3/7] net: ftgmac100: Add reset toggling for Aspeed SOCs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20241205072048.1397570-4-jacky_chou@aspeedtech.com>
Date: Thu, 5 Dec 2024 15:20:44 +0800
From: Jacky Chou <jacky_chou@...eedtech.com>
To: <andrew+netdev@...n.ch>, <davem@...emloft.net>, <edumazet@...gle.com>,
	<kuba@...nel.org>, <pabeni@...hat.com>, <robh@...nel.org>,
	<krzk+dt@...nel.org>, <conor+dt@...nel.org>, <p.zabel@...gutronix.de>,
	<netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
CC: <jacky_chou@...eedtech.com>
Subject: [PATCH net-next v4 3/7] net: ftgmac100: Add reset toggling for Aspeed SOCs

Toggle the SCU reset before hardware initialization.

Signed-off-by: Jacky Chou <jacky_chou@...eedtech.com>
---
 drivers/net/ethernet/faraday/ftgmac100.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c
index 17ec35e75a65..96c1eee547c4 100644
--- a/drivers/net/ethernet/faraday/ftgmac100.c
+++ b/drivers/net/ethernet/faraday/ftgmac100.c
@@ -9,6 +9,7 @@
 #define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
 
 #include <linux/clk.h>
+#include <linux/reset.h>
 #include <linux/dma-mapping.h>
 #include <linux/etherdevice.h>
 #include <linux/ethtool.h>
@@ -98,6 +99,7 @@ struct ftgmac100 {
 	struct work_struct reset_task;
 	struct mii_bus *mii_bus;
 	struct clk *clk;
+	struct reset_control *rst;
 
 	/* AST2500/AST2600 RMII ref clock gate */
 	struct clk *rclk;
@@ -1979,6 +1981,22 @@ static int ftgmac100_probe(struct platform_device *pdev)
 				  priv->base + FTGMAC100_OFFSET_TM);
 	}
 
+	priv->rst = devm_reset_control_get_optional_exclusive(priv->dev, NULL);
+	if (IS_ERR(priv->rst))
+		goto err_register_netdev;
+
+	err = reset_control_assert(priv->rst);
+	if (err) {
+		dev_err(priv->dev, "Failed to reset mac (%d)\n", err);
+		goto err_register_netdev;
+	}
+	usleep_range(10000, 20000);
+	err = reset_control_deassert(priv->rst);
+	if (err) {
+		dev_err(priv->dev, "Failed to deassert mac reset (%d)\n", err);
+		goto err_register_netdev;
+	}
+
 	/* Default ring sizes */
 	priv->rx_q_entries = priv->new_rx_q_entries = DEF_RX_QUEUE_ENTRIES;
 	priv->tx_q_entries = priv->new_tx_q_entries = DEF_TX_QUEUE_ENTRIES;
-- 
2.25.1