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| author |   Tomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com> | 2011-10-12 13:13:00 +0900 |
|---|---|---|
| committer |   Ben Dooks <ben-linux@fluff.org> | 2011-10-29 11:09:32 +0100 |
| commit | 93e4ad74da14c8d5564cfc0b57c40ca311e53d47 (patch) | |
| tree | 190708ec41707f3bdae87b68ddaa299b86b43f4d /drivers/i2c | |
| parent | Merge branch 'devel-stable' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm (diff) | |
| download | linux-dev-93e4ad74da14c8d5564cfc0b57c40ca311e53d47.tar.xz linux-dev-93e4ad74da14c8d5564cfc0b57c40ca311e53d47.zip | |
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>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-eg20t.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/i2c/busses/i2c-eg20t.c b/drivers/i2c/busses/i2c-eg20t.c index ce1a32b71e47..a4f76cb76c46 100644 --- a/drivers/i2c/busses/i2c-eg20t.c +++ b/drivers/i2c/busses/i2c-eg20t.c @@ -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; } /** |