i2c-eg20t: Fix bus-idle waiting issue
Currently, when checking whether bus is idle or not,
if timeout occurs,
this function always returns success(zero).
This patch fixes the issue.
Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/drivers/i2c/busses/i2c-eg20t.c b/drivers/i2c/busses/i2c-eg20t.c
index ce1a32b..a4f76cb 100644
--- a/drivers/i2c/busses/i2c-eg20t.c
+++ b/drivers/i2c/busses/i2c-eg20t.c
@@ -273,23 +273,23 @@
s32 timeout)
{
void __iomem *p = adap->pch_base_address;
+ ktime_t ns_val;
+
+ if ((ioread32(p + PCH_I2CSR) & I2CMBB_BIT) == 0)
+ return 0;
/* MAX timeout value is timeout*1000*1000nsec */
- ktime_t ns_val = ktime_add_ns(ktime_get(), timeout*1000*1000);
+ ns_val = ktime_add_ns(ktime_get(), timeout*1000*1000);
do {
- if ((ioread32(p + PCH_I2CSR) & I2CMBB_BIT) == 0)
- break;
msleep(20);
+ if ((ioread32(p + PCH_I2CSR) & I2CMBB_BIT) == 0)
+ return 0;
} while (ktime_lt(ktime_get(), ns_val));
pch_dbg(adap, "I2CSR = %x\n", ioread32(p + PCH_I2CSR));
+ pch_err(adap, "%s: Timeout Error.return%d\n", __func__, -ETIME);
- if (timeout == 0) {
- pch_err(adap, "%s: Timeout Error.return%d\n", __func__, -ETIME);
- return -ETIME;
- }
-
- return 0;
+ return -ETIME;
}
/**