diff options
| author | Cory Tusar <cory.tusar@pid1solutions.com> | 2016-01-06 22:55:02 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-09 17:27:45 -0800 |
| commit | c074abe02e5e3479b2dfd109fa2620d22d351c34 (patch) | |
| tree | adc774a6ff8b6e6cc3ad47dc797e0fdcf886d77e /drivers/misc/eeprom | |
| parent | 862a4a7836ebe77beabcda844d03e1eab3e1cf19 (diff) | |
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: Cory Tusar <cory.tusar@pid1solutions.com>
Tested-by: Chris Healy <chris.healy@zii.aero>
Reviewed-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/eeprom')
| -rw-r--r-- | drivers/misc/eeprom/eeprom_93xx46.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/misc/eeprom/eeprom_93xx46.c b/drivers/misc/eeprom/eeprom_93xx46.c index da3c081c2639..f0c30b366218 100644 --- a/drivers/misc/eeprom/eeprom_93xx46.c +++ b/drivers/misc/eeprom/eeprom_93xx46.c @@ -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, |