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| author | Peter Swain <pswain@cavium.com> | 2016-04-25 16:33:33 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2016-04-25 23:33:16 +0200 |
| commit | 30c24b25142a9171d38e8074758b3a370906fc7d (patch) | |
| tree | aed646b04d769d4c1f7f79c2defbf9892120469b /drivers/i2c | |
| parent | c981e34eee146fe560c46704396342ff979346d7 (diff) | |
| download | linux-30c24b25142a9171d38e8074758b3a370906fc7d.tar.gz linux-30c24b25142a9171d38e8074758b3a370906fc7d.tar.bz2 linux-30c24b25142a9171d38e8074758b3a370906fc7d.zip | |
i2c: octeon: Add flush writeq helper function
Add helper function that reads back a value after writing to
make sure the write is finished and use it in octeon_i2c_write_int().
Signed-off-by: Peter Swain <pswain@cavium.com>
Signed-off-by: Jan Glauber <jglauber@cavium.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-octeon.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-octeon.c b/drivers/i2c/busses/i2c-octeon.c index f83f6b8892b5..08ca66505ce2 100644 --- a/drivers/i2c/busses/i2c-octeon.c +++ b/drivers/i2c/busses/i2c-octeon.c @@ -103,6 +103,12 @@ struct octeon_i2c { struct device *dev; }; +static void octeon_i2c_writeq_flush(u64 val, void __iomem *addr) +{ + __raw_writeq(val, addr); + __raw_readq(addr); /* wait for write to land */ +} + /** * octeon_i2c_reg_write - write an I2C core register * @i2c: The struct octeon_i2c @@ -172,8 +178,7 @@ static u64 octeon_i2c_read_int(struct octeon_i2c *i2c) */ static void octeon_i2c_write_int(struct octeon_i2c *i2c, u64 data) { - __raw_writeq(data, i2c->twsi_base + TWSI_INT); - __raw_readq(i2c->twsi_base + TWSI_INT); + octeon_i2c_writeq_flush(data, i2c->twsi_base + TWSI_INT); } /** |