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Commit 3fa27571 authored by Alexander Aring's avatar Alexander Aring Committed by David S. Miller
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at86rf230: make reset pin optionally 



This patch make the reset pin optionally. Some devices like the atben
from qi-hardware don't have a reset pin externally. The usually way is
to turn power off/on for the atben device to initiate a device reset.

Signed-off-by: default avatarAlexander Aring <alex.aring@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 56f023fb

drivers/net/ieee802154/at86rf230.c

+21 −13
Original line number Diff line number Diff line
@@ -1059,9 +1059,11 @@ static int at86rf230_probe(struct spi_device *spi) 
		return -EINVAL;

	}



	if (gpio_is_valid(pdata->rstn)) {

		rc = gpio_request(pdata->rstn, "rstn");

		if (rc)

			return rc;

	}



	if (gpio_is_valid(pdata->slp_tr)) {

		rc = gpio_request(pdata->slp_tr, "slp_tr");
@@ -1069,9 +1071,11 @@ static int at86rf230_probe(struct spi_device *spi) 
			goto err_slp_tr;

	}



	if (gpio_is_valid(pdata->rstn)) {

		rc = gpio_direction_output(pdata->rstn, 1);

		if (rc)

			goto err_gpio_dir;

	}



	if (gpio_is_valid(pdata->slp_tr)) {

		rc = gpio_direction_output(pdata->slp_tr, 0);
@@ -1080,11 +1084,13 @@ static int at86rf230_probe(struct spi_device *spi) 
	}



	/* Reset */

	if (gpio_is_valid(pdata->rstn)) {

		udelay(1);

		gpio_set_value(pdata->rstn, 0);

		udelay(1);

		gpio_set_value(pdata->rstn, 1);

		usleep_range(120, 240);

	}



	rc = __at86rf230_detect_device(spi, &man_id, &part, &version);

	if (rc < 0)
@@ -1198,6 +1204,7 @@ static int at86rf230_probe(struct spi_device *spi) 
	if (gpio_is_valid(pdata->slp_tr))

		gpio_free(pdata->slp_tr);

err_slp_tr:

	if (gpio_is_valid(pdata->rstn))

		gpio_free(pdata->rstn);

	return rc;

}
@@ -1214,6 +1221,7 @@ static int at86rf230_remove(struct spi_device *spi) 


	if (gpio_is_valid(pdata->slp_tr))

		gpio_free(pdata->slp_tr);

	if (gpio_is_valid(pdata->rstn))

		gpio_free(pdata->rstn);



	mutex_destroy(&lp->bmux);