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Subject[PATCH 11/12] i2c: xlr: use core to detect 'no zero length' quirk
Date
And don't reimplement in the driver.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---

Only build tested.

drivers/i2c/busses/i2c-xlr.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/i2c/busses/i2c-xlr.c b/drivers/i2c/busses/i2c-xlr.c
index 484bfa15d58e..34cd4b308540 100644
--- a/drivers/i2c/busses/i2c-xlr.c
+++ b/drivers/i2c/busses/i2c-xlr.c
@@ -173,9 +173,6 @@ static int xlr_i2c_tx(struct xlr_i2c_private *priv, u16 len,
u8 offset;
u32 xfer;

- if (!len)
- return -EOPNOTSUPP;
-
offset = buf[0];
xlr_i2c_wreg(priv->iobase, XLR_I2C_ADDR, offset);
xlr_i2c_wreg(priv->iobase, XLR_I2C_DEVADDR, addr);
@@ -241,9 +238,6 @@ static int xlr_i2c_rx(struct xlr_i2c_private *priv, u16 len, u8 *buf, u16 addr)
unsigned long timeout, stoptime, checktime;
int nbytes, timedout;

- if (!len)
- return -EOPNOTSUPP;
-
xlr_i2c_wreg(priv->iobase, XLR_I2C_CFG,
XLR_I2C_CFG_NOADDR | priv->cfg->cfg_extra);
xlr_i2c_wreg(priv->iobase, XLR_I2C_BYTECNT, len - 1);
@@ -340,6 +334,10 @@ static const struct i2c_algorithm xlr_i2c_algo = {
.functionality = xlr_func,
};

+static const struct i2c_adapter_quirks xlr_i2c_quirks = {
+ .flags = I2C_AQ_NO_ZERO_LEN,
+};
+
static const struct xlr_i2c_config xlr_i2c_config_default = {
.status_busy = XLR_I2C_BUS_BUSY,
.cfg_extra = 0,
@@ -427,6 +425,7 @@ static int xlr_i2c_probe(struct platform_device *pdev)
priv->adap.owner = THIS_MODULE;
priv->adap.algo_data = priv;
priv->adap.algo = &xlr_i2c_algo;
+ priv->adap.quirks = &xlr_i2c_quirks;
priv->adap.nr = pdev->id;
priv->adap.class = I2C_CLASS_HWMON;
snprintf(priv->adap.name, sizeof(priv->adap.name), "xlr-i2c");
--
2.11.0
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