From: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
To: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org,
Vineet Gupta <Vineet.Gupta1@synopsys.com>,
Alexey Brodkin <Alexey.Brodkin@synopsys.com>,
Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Subject: [PATCH] ARC: AXS10x: Add temporary quirk to reset ethernet IP
Date: Wed, 6 Sep 2017 21:21:08 +0300 [thread overview]
Message-ID: <20170906182108.16765-1-Eugeniy.Paltsev@synopsys.com> (raw)
DW ethernet controller on AXS10x hangs sometimes after SW reset, so
add temporary quirk to reset DW ethernet controller IP core.
This quirk can be removed after axs10x reset driver
(see http://patchwork.ozlabs.org/patch/800273/)
or simple reset driver
(see https://patchwork.kernel.org/patch/9903375/)
will be available in upstream.
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
---
arch/arc/plat-axs10x/axs10x.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arc/plat-axs10x/axs10x.c b/arch/arc/plat-axs10x/axs10x.c
index f1ac679..cf14ebc 100644
--- a/arch/arc/plat-axs10x/axs10x.c
+++ b/arch/arc/plat-axs10x/axs10x.c
@@ -111,6 +111,13 @@ static void __init axs10x_early_init(void)
axs10x_enable_gpio_intc_wire();
+ /*
+ * Reset ethernet IP core.
+ * TODO: get rid of this quirk after axs10x reset driver (or simple
+ * reset driver) will be available in upstream.
+ */
+ iowrite32((1 << 5), (void __iomem *) CREG_MB_SW_RESET);
+
scnprintf(mb, 32, "MainBoard v%d", mb_rev);
axs10x_print_board_ver(CREG_MB_VER, mb);
}
--
2.9.3
next reply other threads:[~2017-09-06 18:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-06 18:21 Eugeniy Paltsev [this message]
2017-09-06 19:54 ` [PATCH] ARC: AXS10x: Add temporary quirk to reset ethernet IP Vineet Gupta
2017-09-08 17:14 ` Eugeniy Paltsev
2017-09-08 17:31 ` Vineet Gupta
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