linux-kernel - [PATCH 4.9 22/28] tg3: Add higher cpu clock for 5762.

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Message-Id: <20180723122426.695115446@linuxfoundation.org>
Date:   Mon, 23 Jul 2018 14:25:22 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Sanjeev Bansal <sanjeevb.bansal@...adcom.com>,
        Siva Reddy Kallam <siva.kallam@...adcom.com>,
        Michael Chan <michael.chan@...adcom.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.9 22/28] tg3: Add higher cpu clock for 5762.

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sanjeev Bansal <sanjeevb.bansal@...adcom.com>

[ Upstream commit 3a498606bb04af603a46ebde8296040b2de350d1 ]

This patch has fix for TX timeout while running bi-directional
traffic with 100 Mbps using 5762.

Signed-off-by: Sanjeev Bansal <sanjeevb.bansal@...adcom.com>
Signed-off-by: Siva Reddy Kallam <siva.kallam@...adcom.com>
Reviewed-by: Michael Chan <michael.chan@...adcom.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/broadcom/tg3.c |    9 +++++++++
 1 file changed, 9 insertions(+)

--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -9276,6 +9276,15 @@ static int tg3_chip_reset(struct tg3 *tp
 
 	tg3_restore_clk(tp);
 
+	/* Increase the core clock speed to fix tx timeout issue for 5762
+	 * with 100Mbps link speed.
+	 */
+	if (tg3_asic_rev(tp) == ASIC_REV_5762) {
+		val = tr32(TG3_CPMU_CLCK_ORIDE_ENABLE);
+		tw32(TG3_CPMU_CLCK_ORIDE_ENABLE, val |
+		     TG3_CPMU_MAC_ORIDE_ENABLE);
+	}
+
 	/* Reprobe ASF enable state.  */
 	tg3_flag_clear(tp, ENABLE_ASF);
 	tp->phy_flags &= ~(TG3_PHYFLG_1G_ON_VAUX_OK |