From b22da3d8526a935aa31e086e63f60ff3246cb61c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 09 Dec 2023 07:24:11 +0000
Subject: [PATCH] add stmac read mac form eeprom
---
kernel/drivers/soc/tegra/flowctrl.c | 34 +++++++++++++++++++---------------
1 files changed, 19 insertions(+), 15 deletions(-)
diff --git a/kernel/drivers/soc/tegra/flowctrl.c b/kernel/drivers/soc/tegra/flowctrl.c
index 5433cc7..5db919d 100644
--- a/kernel/drivers/soc/tegra/flowctrl.c
+++ b/kernel/drivers/soc/tegra/flowctrl.c
@@ -1,21 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* drivers/soc/tegra/flowctrl.c
*
* Functions and macros to control the flowcontroller
*
* Copyright (c) 2010-2012, NVIDIA Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/cpumask.h>
@@ -102,8 +91,23 @@
reg &= ~TEGRA30_FLOW_CTRL_CSR_WFE_BITMAP;
/* clear wfi bitmap */
reg &= ~TEGRA30_FLOW_CTRL_CSR_WFI_BITMAP;
- /* pwr gating on wfi */
- reg |= TEGRA30_FLOW_CTRL_CSR_WFI_CPU0 << cpuid;
+
+ if (tegra_get_chip_id() == TEGRA30) {
+ /*
+ * The wfi doesn't work well on Tegra30 because
+ * CPU hangs under some odd circumstances after
+ * power-gating (like memory running off PLLP),
+ * hence use wfe that is working perfectly fine.
+ * Note that Tegra30 TRM doc clearly stands that
+ * wfi should be used for the "Cluster Switching",
+ * while wfe for the power-gating, just like it
+ * is done on Tegra20.
+ */
+ reg |= TEGRA20_FLOW_CTRL_CSR_WFE_CPU0 << cpuid;
+ } else {
+ /* pwr gating on wfi */
+ reg |= TEGRA30_FLOW_CTRL_CSR_WFI_CPU0 << cpuid;
+ }
break;
}
reg |= FLOW_CTRL_CSR_INTR_FLAG; /* clear intr flag */
@@ -215,7 +219,7 @@
return 0;
}
- tegra_flowctrl_base = ioremap_nocache(res.start, resource_size(&res));
+ tegra_flowctrl_base = ioremap(res.start, resource_size(&res));
if (!tegra_flowctrl_base)
return -ENXIO;
--
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