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Commit c074abe0 authored by Cory Tusar's avatar Cory Tusar Committed by Greg Kroah-Hartman
Browse files

misc: eeprom_93xx46: Implement eeprom_93xx46 DT bindings. 



This commit implements bindings in the eeprom_93xx46 driver allowing
device word size and read-only attributes to be specified via
devicetree.

Signed-off-by: default avatarCory Tusar <cory.tusar@pid1solutions.com>
Tested-by: default avatarChris Healy <chris.healy@zii.aero>
Reviewed-by: default avatarVladimir Zapolskiy <vz@mleia.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 862a4a78

drivers/misc/eeprom/eeprom_93xx46.c

+49 −0
Original line number Diff line number Diff line
@@ -13,6 +13,8 @@ 
#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/mutex.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/slab.h>

#include <linux/spi/spi.h>

#include <linux/sysfs.h>
@@ -294,12 +296,58 @@ static ssize_t eeprom_93xx46_store_erase(struct device *dev, 
}

static DEVICE_ATTR(erase, S_IWUSR, NULL, eeprom_93xx46_store_erase);



static const struct of_device_id eeprom_93xx46_of_table[] = {

	{ .compatible = "eeprom-93xx46", },

	{}

};

MODULE_DEVICE_TABLE(of, eeprom_93xx46_of_table);



static int eeprom_93xx46_probe_dt(struct spi_device *spi)

{

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

	struct eeprom_93xx46_platform_data *pd;

	u32 tmp;

	int ret;



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

	if (!pd)

		return -ENOMEM;



	ret = of_property_read_u32(np, "data-size", &tmp);

	if (ret < 0) {

		dev_err(&spi->dev, "data-size property not found\n");

		return ret;

	}



	if (tmp == 8) {

		pd->flags |= EE_ADDR8;

	} else if (tmp == 16) {

		pd->flags |= EE_ADDR16;

	} else {

		dev_err(&spi->dev, "invalid data-size (%d)\n", tmp);

		return -EINVAL;

	}



	if (of_property_read_bool(np, "read-only"))

		pd->flags |= EE_READONLY;



	spi->dev.platform_data = pd;



	return 0;

}



static int eeprom_93xx46_probe(struct spi_device *spi)

{

	struct eeprom_93xx46_platform_data *pd;

	struct eeprom_93xx46_dev *edev;

	int err;



	if (spi->dev.of_node) {

		err = eeprom_93xx46_probe_dt(spi);

		if (err < 0)

			return err;

	}



	pd = spi->dev.platform_data;

	if (!pd) {

		dev_err(&spi->dev, "missing platform data\n");
@@ -370,6 +418,7 @@ static int eeprom_93xx46_remove(struct spi_device *spi) 
static struct spi_driver eeprom_93xx46_driver = {

	.driver = {

		.name	= "93xx46",

		.of_match_table = of_match_ptr(eeprom_93xx46_of_table),

	},

	.probe		= eeprom_93xx46_probe,

	.remove		= eeprom_93xx46_remove,