Commit 0db055c9 authored by Brad Campbell's avatar Brad Campbell Committed by Marcel Holtmann
Browse files

cc2520: Do not store platform_data in spi_device 



Storing the `platform_data` struct inside of the SPI struct when using
the device tree allows for a later function to edit the content of that
struct. This patch refactors the `cc2520_get_platformat_data` function
to accept a pointer to a `cc2520_platform_data` struct and populates
the fields inside of it.

This change mirrors commit aaa1c4d2
("at86rf230: copy pdata to driver allocated space").

Signed-off-by: default avatarBrad Campbell <bradjc5@gmail.com>
Acked-by: default avatarVarka Bhadram <varkabhadram@gmail.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 63511f6d

drivers/net/ieee802154/cc2520.c

+46 −49
Original line number Diff line number Diff line
@@ -714,6 +714,33 @@ static irqreturn_t cc2520_sfd_isr(int irq, void *data) 
	return IRQ_HANDLED;

}



static int cc2520_get_platform_data(struct spi_device *spi,

				    struct cc2520_platform_data *pdata)

{

	struct device_node *np = spi->dev.of_node;

	struct cc2520_private *priv = spi_get_drvdata(spi);



	if (!np) {

		struct cc2520_platform_data *spi_pdata = spi->dev.platform_data;

		if (!spi_pdata)

			return -ENOENT;

		*pdata = *spi_pdata;

		return 0;

	}



	pdata->fifo = of_get_named_gpio(np, "fifo-gpio", 0);

	priv->fifo_pin = pdata->fifo;



	pdata->fifop = of_get_named_gpio(np, "fifop-gpio", 0);



	pdata->sfd = of_get_named_gpio(np, "sfd-gpio", 0);

	pdata->cca = of_get_named_gpio(np, "cca-gpio", 0);

	pdata->vreg = of_get_named_gpio(np, "vreg-gpio", 0);

	pdata->reset = of_get_named_gpio(np, "reset-gpio", 0);



	return 0;

}



static int cc2520_hw_init(struct cc2520_private *priv)

{

	u8 status = 0, state = 0xff;
@@ -808,40 +835,10 @@ err_ret: 
	return ret;

}



static struct cc2520_platform_data *

cc2520_get_platform_data(struct spi_device *spi)

{

	struct cc2520_platform_data *pdata;

	struct device_node *np = spi->dev.of_node;

	struct cc2520_private *priv = spi_get_drvdata(spi);



	if (!np)

		return spi->dev.platform_data;



	pdata = devm_kzalloc(&spi->dev, sizeof(*pdata), GFP_KERNEL);

	if (!pdata)

		goto done;



	pdata->fifo = of_get_named_gpio(np, "fifo-gpio", 0);

	priv->fifo_pin = pdata->fifo;



	pdata->fifop = of_get_named_gpio(np, "fifop-gpio", 0);



	pdata->sfd = of_get_named_gpio(np, "sfd-gpio", 0);

	pdata->cca = of_get_named_gpio(np, "cca-gpio", 0);

	pdata->vreg = of_get_named_gpio(np, "vreg-gpio", 0);

	pdata->reset = of_get_named_gpio(np, "reset-gpio", 0);



	spi->dev.platform_data = pdata;



done:

	return pdata;

}



static int cc2520_probe(struct spi_device *spi)

{

	struct cc2520_private *priv;

	struct cc2520_platform_data *pdata;

	struct cc2520_platform_data pdata;

	int ret;



	priv = devm_kzalloc(&spi->dev, sizeof(*priv), GFP_KERNEL);
@@ -850,8 +847,8 @@ static int cc2520_probe(struct spi_device *spi) 


	spi_set_drvdata(spi, priv);



	pdata = cc2520_get_platform_data(spi);

	if (!pdata) {

	ret = cc2520_get_platform_data(spi, &pdata);

	if (ret < 0) {

		dev_err(&spi->dev, "no platform data\n");

		return -EINVAL;

	}
@@ -869,76 +866,76 @@ static int cc2520_probe(struct spi_device *spi) 
	init_completion(&priv->tx_complete);



	/* Request all the gpio's */

	if (!gpio_is_valid(pdata->fifo)) {

	if (!gpio_is_valid(pdata.fifo)) {

		dev_err(&spi->dev, "fifo gpio is not valid\n");

		ret = -EINVAL;

		goto err_hw_init;

	}



	ret = devm_gpio_request_one(&spi->dev, pdata->fifo,

	ret = devm_gpio_request_one(&spi->dev, pdata.fifo,

				    GPIOF_IN, "fifo");

	if (ret)

		goto err_hw_init;



	if (!gpio_is_valid(pdata->cca)) {

	if (!gpio_is_valid(pdata.cca)) {

		dev_err(&spi->dev, "cca gpio is not valid\n");

		ret = -EINVAL;

		goto err_hw_init;

	}



	ret = devm_gpio_request_one(&spi->dev, pdata->cca,

	ret = devm_gpio_request_one(&spi->dev, pdata.cca,

				    GPIOF_IN, "cca");

	if (ret)

		goto err_hw_init;



	if (!gpio_is_valid(pdata->fifop)) {

	if (!gpio_is_valid(pdata.fifop)) {

		dev_err(&spi->dev, "fifop gpio is not valid\n");

		ret = -EINVAL;

		goto err_hw_init;

	}



	ret = devm_gpio_request_one(&spi->dev, pdata->fifop,

	ret = devm_gpio_request_one(&spi->dev, pdata.fifop,

				    GPIOF_IN, "fifop");

	if (ret)

		goto err_hw_init;



	if (!gpio_is_valid(pdata->sfd)) {

	if (!gpio_is_valid(pdata.sfd)) {

		dev_err(&spi->dev, "sfd gpio is not valid\n");

		ret = -EINVAL;

		goto err_hw_init;

	}



	ret = devm_gpio_request_one(&spi->dev, pdata->sfd,

	ret = devm_gpio_request_one(&spi->dev, pdata.sfd,

				    GPIOF_IN, "sfd");

	if (ret)

		goto err_hw_init;



	if (!gpio_is_valid(pdata->reset)) {

	if (!gpio_is_valid(pdata.reset)) {

		dev_err(&spi->dev, "reset gpio is not valid\n");

		ret = -EINVAL;

		goto err_hw_init;

	}



	ret = devm_gpio_request_one(&spi->dev, pdata->reset,

	ret = devm_gpio_request_one(&spi->dev, pdata.reset,

				    GPIOF_OUT_INIT_LOW, "reset");

	if (ret)

		goto err_hw_init;



	if (!gpio_is_valid(pdata->vreg)) {

	if (!gpio_is_valid(pdata.vreg)) {

		dev_err(&spi->dev, "vreg gpio is not valid\n");

		ret = -EINVAL;

		goto err_hw_init;

	}



	ret = devm_gpio_request_one(&spi->dev, pdata->vreg,

	ret = devm_gpio_request_one(&spi->dev, pdata.vreg,

				    GPIOF_OUT_INIT_LOW, "vreg");

	if (ret)

		goto err_hw_init;



	gpio_set_value(pdata->vreg, HIGH);

	gpio_set_value(pdata.vreg, HIGH);

	usleep_range(100, 150);



	gpio_set_value(pdata->reset, HIGH);

	gpio_set_value(pdata.reset, HIGH);

	usleep_range(200, 250);



	ret = cc2520_hw_init(priv);
@@ -947,7 +944,7 @@ static int cc2520_probe(struct spi_device *spi) 


	/* Set up fifop interrupt */

	ret = devm_request_irq(&spi->dev,

			       gpio_to_irq(pdata->fifop),

			       gpio_to_irq(pdata.fifop),

			       cc2520_fifop_isr,

			       IRQF_TRIGGER_RISING,

			       dev_name(&spi->dev),
@@ -959,7 +956,7 @@ static int cc2520_probe(struct spi_device *spi) 


	/* Set up sfd interrupt */

	ret = devm_request_irq(&spi->dev,

			       gpio_to_irq(pdata->sfd),

			       gpio_to_irq(pdata.sfd),

			       cc2520_sfd_isr,

			       IRQF_TRIGGER_FALLING,

			       dev_name(&spi->dev),

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