Hello,
On Thu, Jan 24, 2013 at 04:06:37PM +0530, Viresh Kumar wrote:
> Most number of versions for any patchset i submitted :)
So let's see if you do a v10 ... :-)
> +static int i2c_generic_recovery(struct i2c_adapter *adap)
> +{
> + struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;
> + int i = 0, val = 1, ret = 0;
> +
> + if (bri->prepare_recovery)
> + bri->prepare_recovery(bri);
> +
Do we want to break out here if sda is high?
> + /*
> + * By this time SCL is high, as we need to give 9 falling-rising edges
> + */
> + while (i++ < RECOVERY_CLK_CNT * 2) {
> + /* SCL shouldn't be low here */
> + if (val && !bri->get_scl(adap)) {
> + dev_err(&adap->dev, "SCL is stuck Low exit recovery\n");
> + ret = -EBUSY;
> + goto unprepare;
> + }
> +
> + val = !val;
> + bri->set_scl(adap, val);
> + ndelay(clk_delay);
> +
> + /* break if sda got high, check only when scl line is high */
Above you wrote "SCL", here "scl". I suggest to use one of them
consistently and use the same capitalisation for sda.
> + if (bri->get_sda && val)
> + if (bri->get_sda(adap))
> + break;
Maybe better:
/* break if sda got high */
if (bri->get_sda && bri->get_sda(adap)) {
/* don't leave with scl low */
if (!val)
bri->set_scl(adap, 1);
break;
}
> + }
> +
> +unprepare:
> + if (bri->unprepare_recovery)
> + bri->unprepare_recovery(bri);
> +
> + return ret;
> +}
> +
> +int i2c_generic_scl_recovery(struct i2c_adapter *adap)
> +{
> + adap->bus_recovery_info->set_scl(adap, 1);
Why this?
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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