Toggle the SCU reset before hardware initialization.
Signed-off-by: Jacky Chou <jacky_chou@xxxxxxxxxxxxxx>
---
drivers/net/ethernet/faraday/ftgmac100.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c
index 17ec35e75a65..1840f7089676 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 +1981,24 @@ 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;
+ if (!priv->rst)
+ dev_info(&pdev->dev, "no reset control found\n");
+
+ 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
