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authorWolfram Sang <wsa+renesas@sang-engineering.com>2018-07-23 23:26:11 +0300
committerWolfram Sang <wsa@the-dreams.de>2018-08-05 00:25:07 +0300
commit5314355a916aea235968d4c51710a65b7c9811ef (patch)
tree84143f38f32e6aa6079113256dd77983ef6f68c7 /drivers/i2c
parent22dda3e4f8219bc502c439277df3a15e9235a7ec (diff)
downloadlinux-5314355a916aea235968d4c51710a65b7c9811ef.tar.xz
i2c: stu300: use core to detect 'no zero length' quirk
And don't reimplement in the driver. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-stu300.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/i2c/busses/i2c-stu300.c b/drivers/i2c/busses/i2c-stu300.c
index fce52bdab2b7..5503fa171df0 100644
--- a/drivers/i2c/busses/i2c-stu300.c
+++ b/drivers/i2c/busses/i2c-stu300.c
@@ -673,12 +673,6 @@ static int stu300_xfer_msg(struct i2c_adapter *adap,
msg->addr, msg->len, msg->flags, stop);
}
- /* Zero-length messages are not supported by this hardware */
- if (msg->len == 0) {
- ret = -EINVAL;
- goto exit_disable;
- }
-
/*
* For some reason, sending the address sometimes fails when running
* on the 13 MHz clock. No interrupt arrives. This is a work around,
@@ -863,6 +857,10 @@ static const struct i2c_algorithm stu300_algo = {
.functionality = stu300_func,
};
+static const struct i2c_adapter_quirks stu300_quirks = {
+ .flags = I2C_AQ_NO_ZERO_LEN,
+};
+
static int stu300_probe(struct platform_device *pdev)
{
struct stu300_dev *dev;
@@ -920,6 +918,8 @@ static int stu300_probe(struct platform_device *pdev)
adap->algo = &stu300_algo;
adap->dev.parent = &pdev->dev;
adap->dev.of_node = pdev->dev.of_node;
+ adap->quirks = &stu300_quirks;
+
i2c_set_adapdata(adap, dev);
/* i2c device drivers may be active on return from add_adapter() */