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

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
...@@ -13,6 +13,8 @@ ...@@ -13,6 +13,8 @@
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/mutex.h> #include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/spi/spi.h> #include <linux/spi/spi.h>
#include <linux/sysfs.h> #include <linux/sysfs.h>
...@@ -294,12 +296,58 @@ static ssize_t eeprom_93xx46_store_erase(struct device *dev, ...@@ -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 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) static int eeprom_93xx46_probe(struct spi_device *spi)
{ {
struct eeprom_93xx46_platform_data *pd; struct eeprom_93xx46_platform_data *pd;
struct eeprom_93xx46_dev *edev; struct eeprom_93xx46_dev *edev;
int err; int err;
if (spi->dev.of_node) {
err = eeprom_93xx46_probe_dt(spi);
if (err < 0)
return err;
}
pd = spi->dev.platform_data; pd = spi->dev.platform_data;
if (!pd) { if (!pd) {
dev_err(&spi->dev, "missing platform data\n"); dev_err(&spi->dev, "missing platform data\n");
...@@ -370,6 +418,7 @@ static int eeprom_93xx46_remove(struct spi_device *spi) ...@@ -370,6 +418,7 @@ static int eeprom_93xx46_remove(struct spi_device *spi)
static struct spi_driver eeprom_93xx46_driver = { static struct spi_driver eeprom_93xx46_driver = {
.driver = { .driver = {
.name = "93xx46", .name = "93xx46",
.of_match_table = of_match_ptr(eeprom_93xx46_of_table),
}, },
.probe = eeprom_93xx46_probe, .probe = eeprom_93xx46_probe,
.remove = eeprom_93xx46_remove, .remove = eeprom_93xx46_remove,
......
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