[PATCH 08/13] i2c: nomadik: replace jiffies by ktime for FIFO flushing timeout

Théo Lebrun
2024-02-15T16:52:45Z

The FIFO flush function uses a jiffies amount to detect timeouts as the
flushing is async. Replace with ktime to get more accurate precision
and support short timeouts.

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
---
drivers/i2c/busses/i2c-nomadik.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c
index e68b8e0d7919..afd54999bbbb 100644
--- a/drivers/i2c/busses/i2c-nomadik.c
+++ b/drivers/i2c/busses/i2c-nomadik.c
@@ -219,8 +219,8 @@ static inline void i2c_clr_bit(void __iomem *reg, u32 mask)
static int flush_i2c_fifo(struct nmk_i2c_dev *priv)
{
#define LOOP_ATTEMPTS 10
+ ktime_t timeout;
int i;
- unsigned long timeout;

/*
* flush the transmit and receive FIFO. The flushing
@@ -232,9 +232,9 @@ static int flush_i2c_fifo(struct nmk_i2c_dev *priv)
writel((I2C_CR_FTX | I2C_CR_FRX), priv->virtbase + I2C_CR);

for (i = 0; i < LOOP_ATTEMPTS; i++) {
- timeout = jiffies + priv->adap.timeout;
+ timeout = ktime_add_us(ktime_get(), priv->timeout_usecs);

- while (!time_after(jiffies, timeout)) {
+ while (ktime_after(timeout, ktime_get())) {
if ((readl(priv->virtbase + I2C_CR) &
(I2C_CR_FTX | I2C_CR_FRX)) == 0)
return 0;

--
2.43.1