From: Wolfram Sang wsa+renesas@sang-engineering.com
[ Upstream commit de82bb431855580ad659bfed3e858bd9dd12efd0 ]
And don't reimplement in the driver.
Signed-off-by: Wolfram Sang wsa+renesas@sang-engineering.com Reviewed-by: Andy Gross andy.gross@linaro.org Signed-off-by: Wolfram Sang wsa@the-dreams.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/i2c/busses/i2c-qup.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/drivers/i2c/busses/i2c-qup.c b/drivers/i2c/busses/i2c-qup.c index c86c3ae1318f2..e09cd0775ae91 100644 --- a/drivers/i2c/busses/i2c-qup.c +++ b/drivers/i2c/busses/i2c-qup.c @@ -1088,11 +1088,6 @@ static int qup_i2c_xfer(struct i2c_adapter *adap, writel(I2C_MINI_CORE | I2C_N_VAL, qup->base + QUP_CONFIG);
for (idx = 0; idx < num; idx++) { - if (msgs[idx].len == 0) { - ret = -EINVAL; - goto out; - } - if (qup_i2c_poll_state_i2c_master(qup)) { ret = -EIO; goto out; @@ -1520,9 +1515,6 @@ qup_i2c_determine_mode_v2(struct qup_i2c_dev *qup,
/* All i2c_msgs should be transferred using either dma or cpu */ for (idx = 0; idx < num; idx++) { - if (msgs[idx].len == 0) - return -EINVAL; - if (msgs[idx].flags & I2C_M_RD) max_rx_len = max_t(unsigned int, max_rx_len, msgs[idx].len); @@ -1636,9 +1628,14 @@ static const struct i2c_algorithm qup_i2c_algo_v2 = { * which limits the possible read to 256 (QUP_READ_LIMIT) bytes. */ static const struct i2c_adapter_quirks qup_i2c_quirks = { + .flags = I2C_AQ_NO_ZERO_LEN, .max_read_len = QUP_READ_LIMIT, };
+static const struct i2c_adapter_quirks qup_i2c_quirks_v2 = { + .flags = I2C_AQ_NO_ZERO_LEN, +}; + static void qup_i2c_enable_clocks(struct qup_i2c_dev *qup) { clk_prepare_enable(qup->clk); @@ -1701,6 +1698,7 @@ static int qup_i2c_probe(struct platform_device *pdev) is_qup_v1 = true; } else { qup->adap.algo = &qup_i2c_algo_v2; + qup->adap.quirks = &qup_i2c_quirks_v2; is_qup_v1 = false; if (acpi_match_device(qup_i2c_acpi_match, qup->dev)) goto nodma;