From: Christian Marangi <ansuelsmth@gmail.com>
To: Stefan Roese <sr@denx.de>, Andi Shyti <andi.shyti@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>,
linux-i2c@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org
Cc: Christian Marangi <ansuelsmth@gmail.com>
Subject: [PATCH 2/5] i2c: mt7621: clear pending interrupt on i2c reset
Date: Sat, 19 Jul 2025 14:56:12 +0200 [thread overview]
Message-ID: <20250719125617.8886-3-ansuelsmth@gmail.com> (raw)
In-Reply-To: <20250719125617.8886-1-ansuelsmth@gmail.com>
On resetting the i2c bus, clear any pending interrupt to have a more
consistent state on the next operation.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
drivers/i2c/busses/i2c-mt7621.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/i2c/busses/i2c-mt7621.c b/drivers/i2c/busses/i2c-mt7621.c
index c0e13f9af3e5..58c3da92cea3 100644
--- a/drivers/i2c/busses/i2c-mt7621.c
+++ b/drivers/i2c/busses/i2c-mt7621.c
@@ -101,6 +101,8 @@ static void mtk_i2c_reset(struct mtk_i2c *i2c)
iowrite32(((i2c->clk_div << 16) & SM0CTL0_CLK_DIV_MASK) | SM0CTL0_EN |
SM0CTL0_SCL_STRETCH, i2c->base + REG_SM0CTL0_REG);
iowrite32(0, i2c->base + REG_SM0CFG2_REG);
+ /* Clear any pending interrupt */
+ iowrite32(1, i2c->base + REG_PINTEN_REG);
}
static void mtk_i2c_dump_reg(struct mtk_i2c *i2c)
--
2.50.0
next prev parent reply other threads:[~2025-07-19 13:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-19 12:56 [PATCH 0/5] i2c: mt7621: improve support for Airoha Christian Marangi
2025-07-19 12:56 ` [PATCH 1/5] i2c: mt7621: rework cmd/wait OPs to support atomic afer variant Christian Marangi
2025-07-19 12:56 ` Christian Marangi [this message]
2025-07-19 12:56 ` [PATCH 3/5] dt-bindings: i2c: mt7621: Document an7581 compatible Christian Marangi
2025-07-21 9:32 ` Krzysztof Kozlowski
2025-07-19 12:56 ` [PATCH 4/5] i2c: mt7621: limit SCL_STRETCH only to Mediatek SoC Christian Marangi
2025-07-19 12:56 ` [PATCH 5/5] i2c: mt7621: make device reset optional Christian Marangi
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