From: Alain Volmat <alain.volmat@foss.st.com>
To: <wsa@kernel.org>, <pierre-yves.mordret@foss.st.com>
Cc: <alexandre.torgue@foss.st.com>, <linux-i2c@vger.kernel.org>,
<linux-stm32@st-md-mailman.stormreply.com>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <fabrice.gasnier@foss.st.com>,
<amelie.delaunay@foss.st.com>, <alain.volmat@foss.st.com>
Subject: [PATCH 1/3] i2c: stm32f7: recover the bus on access timeout
Date: Wed, 30 Jun 2021 16:11:41 +0200 [thread overview]
Message-ID: <1625062303-15327-2-git-send-email-alain.volmat@foss.st.com> (raw)
In-Reply-To: <1625062303-15327-1-git-send-email-alain.volmat@foss.st.com>
When getting an access timeout, ensure that the bus is in a proper
state prior to returning the error.
Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver")
Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
---
drivers/i2c/busses/i2c-stm32f7.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index b9b19a2a2ffa..d596733136c3 100644
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -1702,6 +1702,7 @@ static int stm32f7_i2c_xfer(struct i2c_adapter *i2c_adap,
i2c_dev->msg->addr);
if (i2c_dev->use_dma)
dmaengine_terminate_all(dma->chan_using);
+ stm32f7_i2c_wait_free_bus(i2c_dev);
ret = -ETIMEDOUT;
}
@@ -1751,6 +1752,7 @@ static int stm32f7_i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr,
dev_dbg(dev, "Access to slave 0x%x timed out\n", f7_msg->addr);
if (i2c_dev->use_dma)
dmaengine_terminate_all(dma->chan_using);
+ stm32f7_i2c_wait_free_bus(i2c_dev);
ret = -ETIMEDOUT;
goto pm_free;
}
--
2.25.1
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next prev parent reply other threads:[~2021-06-30 14:30 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-30 14:11 [PATCH 0/3] i2c: stm32f7: several fixes in error cases Alain Volmat
2021-06-30 14:11 ` Alain Volmat [this message]
2021-06-30 14:11 ` [PATCH 2/3] i2c: stm32f7: flush TX FIFO upon transfer errors Alain Volmat
2021-06-30 14:11 ` [PATCH 3/3] i2c: stm32f7: prevent calling slave handling if no slave running Alain Volmat
2021-11-29 12:21 ` Wolfram Sang
2021-11-29 12:25 ` Alain Volmat
2021-07-01 8:51 ` [PATCH 0/3] i2c: stm32f7: several fixes in error cases Alain Volmat
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