i2c: mlxbf: incorrect base address passed during io write

[ Upstream commit 2a5be6d1340c0fefcee8a6489cff7fd88a0d5b85 ]

Correct the base address used during io write.
This bug had no impact over the overall functionality of the read and write
transactions. MLXBF_I2C_CAUSE_OR_CLEAR=0x18 so writing to (smbus->io + 0x18)
instead of (mst_cause->ioi + 0x18) actually writes to the sc_low_timeout
register which just sets the timeout value before a read/write aborts.

Fixes: b5b5b32081cd206b (i2c: mlxbf: I2C SMBus driver for Mellanox BlueField SoC)
Reviewed-by: Khalil Blaiech <kblaiech@nvidia.com>
Signed-off-by: Asmaa Mnebhi <asmaa@nvidia.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/i2c/busses/i2c-mlxbf.c b/drivers/i2c/busses/i2c-mlxbf.c
index 8716032f030a016b90cebd6c50951d638d4b343d..612736906440d5e8dd08176a8b02f94f3b5aaaa4 100644 (file)
--- a/drivers/i2c/busses/i2c-mlxbf.c
+++ b/drivers/i2c/busses/i2c-mlxbf.c
@@ -669,7 +669,7 @@ static int mlxbf_i2c_smbus_enable(struct mlxbf_i2c_priv *priv, u8 slave,
        /* Clear status bits. */
        writel(0x0, priv->smbus->io + MLXBF_I2C_SMBUS_MASTER_STATUS);
        /* Set the cause data. */
-       writel(~0x0, priv->smbus->io + MLXBF_I2C_CAUSE_OR_CLEAR);
+       writel(~0x0, priv->mst_cause->io + MLXBF_I2C_CAUSE_OR_CLEAR);
        /* Zero PEC byte. */
        writel(0x0, priv->smbus->io + MLXBF_I2C_SMBUS_MASTER_PEC);
        /* Zero byte count. */