[PATCH] I2C: JZ4780: Fix bug for Ingenic X1000.
From: 周琰杰 (Zhou Yanjie) <hidden>
Date: 2021-03-18 16:26:46
Also in:
linux-mips, lkml, stable
Subsystem:
i2c subsystem, i2c subsystem host drivers, ingenic jz47xx socs, the rest · Maintainers:
Andi Shyti, Paul Cercueil, Linus Torvalds
Only send "X1000_I2C_DC_STOP" when last byte, or it will cause
error when I2C write operation.
Fixes: 21575a7a8d4c ("I2C: JZ4780: Add support for the X1000.")
Signed-off-by: 周琰杰 (Zhou Yanjie) <redacted>
---
drivers/i2c/busses/i2c-jz4780.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/i2c/busses/i2c-jz4780.c b/drivers/i2c/busses/i2c-jz4780.c
index 8509c5f..1ad093a 100644
--- a/drivers/i2c/busses/i2c-jz4780.c
+++ b/drivers/i2c/busses/i2c-jz4780.c@@ -520,13 +520,12 @@ static irqreturn_t jz4780_i2c_irq(int irqno, void *dev_id) i2c_sta = jz4780_i2c_readw(i2c, JZ4780_I2C_STA); - while ((i2c_sta & JZ4780_I2C_STA_TFNF) && - (i2c->wt_len > 0)) { + while ((i2c_sta & JZ4780_I2C_STA_TFNF) && (i2c->wt_len > 0)) { 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++;
--
2.7.4