[PATCH V2 7/7] i2c: sprd: Add I2C_NACK_EN and I2C_TRANS_EN control bits

Huangzheng Lai
2023-10-23T08:13:42Z

The new I2C IP version on the UNISOC platform has added I2C_NACK_EN and
I2C_TRANS_EN control bits. To ensure that the I2C controller can initiate
transmission smoothly, these two bits need to be configured.

Signed-off-by: Huangzheng Lai <Huangzheng.Lai@unisoc.com>
---
drivers/i2c/busses/i2c-sprd.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-sprd.c b/drivers/i2c/busses/i2c-sprd.c
index dbdac89ad482..431c0db84d22 100644
--- a/drivers/i2c/busses/i2c-sprd.c
+++ b/drivers/i2c/busses/i2c-sprd.c
@@ -33,6 +33,8 @@
#define ADDR_RST 0x2c

/* I2C_CTL */
+#define I2C_NACK_EN BIT(22)
+#define I2C_TRANS_EN BIT(21)
#define STP_EN BIT(20)
#define FIFO_AF_LVL_MASK GENMASK(19, 16)
#define FIFO_AF_LVL 16
@@ -366,7 +368,7 @@ static void sprd_i2c_enable(struct sprd_i2c *i2c_dev)
sprd_i2c_clear_irq(i2c_dev);

tmp = readl(i2c_dev->base + I2C_CTL);
- writel(tmp | I2C_EN | I2C_INT_EN, i2c_dev->base + I2C_CTL);
+ writel(tmp | I2C_EN | I2C_INT_EN | I2C_NACK_EN | I2C_TRANS_EN, i2c_dev->base + I2C_CTL);
}

static int sprd_i2c_master_xfer(struct i2c_adapter *i2c_adap,
--
2.17.1