linux-kernel - [Patch net-next 2/3] net: dsa: microchip: lan937x: clear the POR_READY

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Date:   Fri, 2 Sep 2022 16:02:09 +0530
From:   Arun Ramadoss <arun.ramadoss@...rochip.com>
To:     <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>
CC:     Woojung Huh <woojung.huh@...rochip.com>,
        <UNGLinuxDriver@...rochip.com>, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "Russell King" <linux@...linux.org.uk>,
        Tristram Ha <Tristram.Ha@...rochip.com>
Subject: [Patch net-next 2/3] net: dsa: microchip: lan937x: clear the POR_READY_INT status bit

In the lan937x_reset_switch(), it masks all the switch and port
registers. In the Global_Int_status register, POR ready bit is write 1
to clear bit and all other bits are read only. So, this patch clear the
por_ready_int status bit by writing 1.

Signed-off-by: Arun Ramadoss <arun.ramadoss@...rochip.com>
---
 drivers/net/dsa/microchip/lan937x_main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/dsa/microchip/lan937x_main.c b/drivers/net/dsa/microchip/lan937x_main.c
index 7b464f1fb5d8..0466c4d0b10c 100644
--- a/drivers/net/dsa/microchip/lan937x_main.c
+++ b/drivers/net/dsa/microchip/lan937x_main.c
@@ -225,6 +225,10 @@ int lan937x_reset_switch(struct ksz_device *dev)
 	if (ret < 0)
 		return ret;
 
+	ret = ksz_write32(dev, REG_SW_INT_STATUS__4, POR_READY_INT);
+	if (ret < 0)
+		return ret;
+
 	ret = ksz_write32(dev, REG_SW_PORT_INT_MASK__4, 0xFF);
 	if (ret < 0)
 		return ret;
-- 
2.36.1