mfd: madera: Don't use regmap_read_poll_timeout to poll for BOOT_DONE

}

EXPORT_SYMBOL_GPL(madera_name_from_type);

#define MADERA_BOOT_POLL_MAX_INTERVAL_US  5000

#define MADERA_BOOT_POLL_TIMEOUT_US	 25000

#define MADERA_BOOT_POLL_INTERVAL_USEC		5000

#define MADERA_BOOT_POLL_TIMEOUT_USEC		25000

static int madera_wait_for_boot(struct madera *madera)

{

	ktime_t timeout;

	unsigned int val;

	int ret;

	int ret = 0;

	/*

	 * We can't use an interrupt as we need to runtime resume to do so,

	 * so we poll the status bit. This won't race with the interrupt

	 * handler because it will be blocked on runtime resume.

	 * The chip could NAK a read request while it is booting so ignore

	 * errors from regmap_read.

	 */

	ret = regmap_read_poll_timeout(madera->regmap,

				       MADERA_IRQ1_RAW_STATUS_1,

				       val,

				       (val & MADERA_BOOT_DONE_STS1),

				       MADERA_BOOT_POLL_MAX_INTERVAL_US,

				       MADERA_BOOT_POLL_TIMEOUT_US);

	timeout = ktime_add_us(ktime_get(), MADERA_BOOT_POLL_TIMEOUT_USEC);

	regmap_read(madera->regmap, MADERA_IRQ1_RAW_STATUS_1, &val);

	while (!(val & MADERA_BOOT_DONE_STS1) &&

	       !ktime_after(ktime_get(), timeout)) {

		usleep_range(MADERA_BOOT_POLL_INTERVAL_USEC / 2,

			     MADERA_BOOT_POLL_INTERVAL_USEC);

		regmap_read(madera->regmap, MADERA_IRQ1_RAW_STATUS_1, &val);

	};

	if (ret)

		dev_err(madera->dev, "Polling BOOT_DONE_STS failed: %d\n", ret);

	if (!(val & MADERA_BOOT_DONE_STS1)) {

		dev_err(madera->dev, "Polling BOOT_DONE_STS timed out\n");

		ret = -ETIMEDOUT;

	}

	/*

	 * BOOT_DONE defaults to unmasked on boot so we must ack it.

	 * Do this unconditionally to avoid interrupt storms.

	 * Do this even after a timeout to avoid interrupt storms.

	 */

	regmap_write(madera->regmap, MADERA_IRQ1_STATUS_1,

		     MADERA_BOOT_DONE_EINT1);