diff options
| author | 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com> | 2021-03-19 11:12:13 +0100 |
|---|---|---|
| committer | Wolfram Sang <wsa@kernel.org> | 2021-03-31 09:16:00 +0200 |
| commit | 942bfbecc0281c75db84f744b9b77b0f2396f484 (patch) | |
| tree | b3a5218dc2a715d82b4935a30fc083dfe43b94d6 /drivers/i2c/busses/i2c-jz4780.c | |
| parent | i2c: turn recovery error on init to debug (diff) | |
| download | linux-942bfbecc0281c75db84f744b9b77b0f2396f484.tar.xz linux-942bfbecc0281c75db84f744b9b77b0f2396f484.zip | |
I2C: JZ4780: Fix bug for Ingenic X1000.
Only send "X1000_I2C_DC_STOP" when last byte, or it will cause
error when I2C write operation which should look like this:
device_addr + w, reg_addr, data;
But without this patch, it looks like this:
device_addr + w, reg_addr, device_addr + w, data;
Fixes: 21575a7a8d4c ("I2C: JZ4780: Add support for the X1000.")
Reported-by: 杨文龙 (Yang Wenlong) <ywltyut@sina.cn>
Tested-by: 杨文龙 (Yang Wenlong) <ywltyut@sina.cn>
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers/i2c/busses/i2c-jz4780.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-jz4780.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-jz4780.c b/drivers/i2c/busses/i2c-jz4780.c index 8509c5f11356..55177eb21d7b 100644 --- a/drivers/i2c/busses/i2c-jz4780.c +++ b/drivers/i2c/busses/i2c-jz4780.c @@ -525,8 +525,8 @@ static irqreturn_t jz4780_i2c_irq(int irqno, void *dev_id) i2c_sta = jz4780_i2c_readw(i2c, JZ4780_I2C_STA); data = *i2c->wbuf; data &= ~JZ4780_I2C_DC_READ; - if ((!i2c->stop_hold) && (i2c->cdata->version >= - ID_X1000)) + if ((i2c->wt_len == 1) && (!i2c->stop_hold) && + (i2c->cdata->version >= ID_X1000)) data |= X1000_I2C_DC_STOP; jz4780_i2c_writew(i2c, JZ4780_I2C_DC, data); i2c->wbuf++; |