On 16 Aug 08:10 PM, Joachim Eastwood wrote:
[..]
> +
> +static int i2c_lpc2k_clear_arb(struct lpc2k_i2c *i2c)
> +{
> + unsigned long timeout = jiffies + msecs_to_jiffies(1000);
> +
> + /*
> + * If the transfer needs to abort for some reason, we'll try to
> + * force a stop condition to clear any pending bus conditions
> + */
> + writel(LPC24XX_STO, i2c->base + LPC24XX_I2CONSET);
> +
> + /* Wait for status change */
> + while (readl(i2c->base + LPC24XX_I2STAT) != M_I2C_IDLE) {
> + if (time_after(jiffies, timeout)) {
> + /* Bus was not idle, try to reset adapter */
> + i2c_lpc2k_reset(i2c);
> + return -EBUSY;
> + }
> +
> + cpu_relax();
> + }
I believe you can use readl_{relaxed}_poll_timeout_{atomic} here.
Ccing Ariel, maybe he can help with a test.
--
Ezequiel Garcia, VanguardiaSur
www.vanguardiasur.com.ar
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