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authorHans Hu <hanshu-oc@zhaoxin.com>2023-11-02 05:53:51 +0300
committerWolfram Sang <wsa@kernel.org>2024-01-18 23:10:43 +0300
commit462e9804d2c90bfffb494718b5aae5c374ff3b78 (patch)
tree9731aadaa42135fbd0a912c2956bd00c9790c82e /drivers/i2c
parenta8355235dbd571b32c750ee756dd6dac216d18f2 (diff)
downloadlinux-462e9804d2c90bfffb494718b5aae5c374ff3b78.tar.xz
i2c: wmt: Reduce redundant: bus busy check
Put wmt_i2c_wait_bus_not_busy() in a more appropriate place to reduce code redundancy Signed-off-by: Hans Hu <hanshu-oc@zhaoxin.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-wmt.c19
1 files changed, 7 insertions, 12 deletions
diff --git a/drivers/i2c/busses/i2c-wmt.c b/drivers/i2c/busses/i2c-wmt.c
index 76118abc6e10..d554c6377533 100644
--- a/drivers/i2c/busses/i2c-wmt.c
+++ b/drivers/i2c/busses/i2c-wmt.c
@@ -128,12 +128,6 @@ static int wmt_i2c_write(struct i2c_adapter *adap, struct i2c_msg *pmsg,
unsigned long wait_result;
int xfer_len = 0;
- if (!(pmsg->flags & I2C_M_NOSTART)) {
- ret = wmt_i2c_wait_bus_not_busy(i2c_dev);
- if (ret < 0)
- return ret;
- }
-
if (pmsg->len == 0) {
/*
* We still need to run through the while (..) once, so
@@ -219,12 +213,6 @@ static int wmt_i2c_read(struct i2c_adapter *adap, struct i2c_msg *pmsg,
unsigned long wait_result;
u32 xfer_len = 0;
- if (!(pmsg->flags & I2C_M_NOSTART)) {
- ret = wmt_i2c_wait_bus_not_busy(i2c_dev);
- if (ret < 0)
- return ret;
- }
-
val = readw(i2c_dev->base + REG_CR);
val &= ~CR_TX_END;
writew(val, i2c_dev->base + REG_CR);
@@ -297,11 +285,18 @@ static int wmt_i2c_xfer(struct i2c_adapter *adap,
struct i2c_msg *pmsg;
int i, is_last;
int ret = 0;
+ struct wmt_i2c_dev *i2c_dev = i2c_get_adapdata(adap);
for (i = 0; ret >= 0 && i < num; i++) {
is_last = ((i + 1) == num);
pmsg = &msgs[i];
+ if (!(pmsg->flags & I2C_M_NOSTART)) {
+ ret = wmt_i2c_wait_bus_not_busy(i2c_dev);
+ if (ret < 0)
+ return ret;
+ }
+
if (pmsg->flags & I2C_M_RD)
ret = wmt_i2c_read(adap, pmsg, is_last);
else