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i2c: rcar: slave: only send STOP event when we have been addressed
When the SSR interrupt is activated, it will detect every STOP condition
on the bus, not only the ones after we have been addressed. So, enable
this interrupt only after we have been addressed, and disable it
otherwise.
Fixes: de20d1857d
("i2c: rcar: add slave support")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
parent
0c2a34937f
commit
314139f9f0
1 changed files with 4 additions and 3 deletions
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@ -583,13 +583,14 @@ static bool rcar_i2c_slave_irq(struct rcar_i2c_priv *priv)
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rcar_i2c_write(priv, ICSIER, SDR | SSR | SAR);
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}
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rcar_i2c_write(priv, ICSSR, ~SAR & 0xff);
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/* Clear SSR, too, because of old STOPs to other clients than us */
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rcar_i2c_write(priv, ICSSR, ~(SAR | SSR) & 0xff);
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}
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/* master sent stop */
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if (ssr_filtered & SSR) {
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i2c_slave_event(priv->slave, I2C_SLAVE_STOP, &value);
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rcar_i2c_write(priv, ICSIER, SAR | SSR);
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rcar_i2c_write(priv, ICSIER, SAR);
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rcar_i2c_write(priv, ICSSR, ~SSR & 0xff);
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}
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@ -853,7 +854,7 @@ static int rcar_reg_slave(struct i2c_client *slave)
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priv->slave = slave;
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rcar_i2c_write(priv, ICSAR, slave->addr);
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rcar_i2c_write(priv, ICSSR, 0);
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rcar_i2c_write(priv, ICSIER, SAR | SSR);
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rcar_i2c_write(priv, ICSIER, SAR);
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rcar_i2c_write(priv, ICSCR, SIE | SDBS);
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return 0;
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