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29 lines
958 B
Diff
29 lines
958 B
Diff
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From f14a14edf12354103e28e8b0336614385766b30a Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Tue, 23 May 2023 14:14:05 +0100
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Subject: [PATCH] i2c-bcm2835: Do not abort transfers on ERR if still
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active
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If a transaction is aborted immediately on ERR being reported,
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then the bus is not returned to the STOP condition, and devices
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generally get very upset.
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Handle the ERR and CLKT conditions only when TA is not set.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/i2c/busses/i2c-bcm2835.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/i2c/busses/i2c-bcm2835.c
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+++ b/drivers/i2c/busses/i2c-bcm2835.c
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@@ -385,7 +385,7 @@ static irqreturn_t bcm2835_i2c_isr(int t
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bcm2835_debug_add(i2c_dev, val);
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err = val & (BCM2835_I2C_S_CLKT | BCM2835_I2C_S_ERR);
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- if (err)
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+ if (err && !(val & BCM2835_I2C_S_TA))
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i2c_dev->msg_err = err;
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if (val & BCM2835_I2C_S_DONE) {
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