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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>
This commit is contained in:
Tomoya MORINAGA 2011-10-12 13:13:00 +09:00 committed by Ben Dooks
parent 1fdb24e969
commit 93e4ad74da
1 changed files with 9 additions and 9 deletions
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18
drivers/i2c/busses/i2c-eg20t.c
View File

@ -273,23 +273,23 @@ static s32 pch_i2c_wait_for_bus_idle(struct i2c_algo_pch_data *adap,
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;
}
/**