linux-kernel - [PATCH v2 1/8] soc: tegra: cbb: clear err force register with err status

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Message-ID: <20250703103829.1721024-2-sumitg@nvidia.com>
Date: Thu, 3 Jul 2025 16:08:22 +0530
From: Sumit Gupta <sumitg@...dia.com>
To: <treding@...dia.com>, <jonathanh@...dia.com>, <robh@...nel.org>,
	<krzk+dt@...nel.org>, <conor+dt@...nel.org>, <linux-tegra@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
CC: <tbergstrom@...dia.com>, <bbasu@...dia.com>, <sumitg@...dia.com>
Subject: [PATCH v2 1/8] soc: tegra: cbb: clear err force register with err status

When error is injected with the ERR_FORCE register, then this
register is not auto cleared on clearing the ERR_STATUS register.
This causes repeated interrupts on error injection. To fix, set
the ERR_FORCE to zero along with clearing the ERR_STATUS register
after handling error.

Fixes: fc2f151d2314 ("soc/tegra: cbb: Add driver for Tegra234 CBB 2.0")
Signed-off-by: Sumit Gupta <sumitg@...dia.com>
---
 drivers/soc/tegra/cbb/tegra234-cbb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/soc/tegra/cbb/tegra234-cbb.c b/drivers/soc/tegra/cbb/tegra234-cbb.c
index c74629af9bb5d..1da31ead2b5eb 100644
--- a/drivers/soc/tegra/cbb/tegra234-cbb.c
+++ b/drivers/soc/tegra/cbb/tegra234-cbb.c
@@ -185,6 +185,8 @@ static void tegra234_cbb_error_clear(struct tegra_cbb *cbb)
 {
 	struct tegra234_cbb *priv = to_tegra234_cbb(cbb);
 
+	writel(0, priv->mon + FABRIC_MN_MASTER_ERR_FORCE_0);
+
 	writel(0x3f, priv->mon + FABRIC_MN_MASTER_ERR_STATUS_0);
 	dsb(sy);
 }
-- 
2.34.1