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| author | Ben Dooks <ben@simtec.co.uk> | 2009-03-27 10:52:13 +0000 |
|---|---|---|
| committer | Ben Dooks <ben-linux@fluff.org> | 2009-04-07 10:18:33 +0100 |
| commit | a192f7153bb33151f83440cd9c0442233a064bf1 (patch) | |
| tree | 0bf8a18ea3ac34c12dddbe70f12d3a340906016a /drivers/i2c | |
| parent | aa11e38ce6fe8846fec046a95cecd5d4690c48cd (diff) | |
| download | linux-a192f7153bb33151f83440cd9c0442233a064bf1.tar.gz linux-a192f7153bb33151f83440cd9c0442233a064bf1.tar.bz2 linux-a192f7153bb33151f83440cd9c0442233a064bf1.zip | |
i2c-s3c2410: sda_delay should be in ns, not clock ticks
The sda_delay field should be specified in ns, not in clock ticks
as when using cpufreq we could be changing the bus rate.
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-s3c2410.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c index 5b7f95641ba4..9d797561de5f 100644 --- a/drivers/i2c/busses/i2c-s3c2410.c +++ b/drivers/i2c/busses/i2c-s3c2410.c @@ -663,6 +663,23 @@ static int s3c24xx_i2c_clockrate(struct s3c24xx_i2c *i2c, unsigned int *got) writel(iiccon, i2c->regs + S3C2410_IICCON); + if (s3c24xx_i2c_is2440(i2c)) { + unsigned long sda_delay; + + if (pdata->sda_delay) { + sda_delay = (freq / 1000) * pdata->sda_delay; + sda_delay /= 1000000; + sda_delay = DIV_ROUND_UP(sda_delay, 5); + if (sda_delay > 3) + sda_delay = 3; + sda_delay |= S3C2410_IICLC_FILTER_ON; + } else + sda_delay = 0; + + dev_dbg(i2c->dev, "IICLC=%08lx\n", sda_delay); + writel(sda_delay, i2c->regs + S3C2440_IICLC); + } + return 0; } @@ -769,11 +786,8 @@ static int s3c24xx_i2c_init(struct s3c24xx_i2c *i2c) /* check for s3c2440 i2c controller */ - if (s3c24xx_i2c_is2440(i2c)) { - dev_dbg(i2c->dev, "S3C2440_IICLC=%08x\n", pdata->sda_delay); - - writel(pdata->sda_delay, i2c->regs + S3C2440_IICLC); - } + if (s3c24xx_i2c_is2440(i2c)) + writel(0x0, i2c->regs + S3C2440_IICLC); return 0; } |