lkml.org 
[lkml]   [2015]   [Nov]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 3/7] misc: eeprom: 93xx46: Implement eeprom_93xx46 DT bindings.
    Date
    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>
    ---
    drivers/misc/eeprom/eeprom_93xx46.c | 62 +++++++++++++++++++++++++++++++++++++
    1 file changed, 62 insertions(+)

    diff --git a/drivers/misc/eeprom/eeprom_93xx46.c b/drivers/misc/eeprom/eeprom_93xx46.c
    index e1bf0a5..1f29d9a 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 +296,71 @@ static ssize_t eeprom_93xx46_store_erase(struct device *dev,
    }
    static DEVICE_ATTR(erase, S_IWUSR, NULL, eeprom_93xx46_store_erase);

    +#ifdef CONFIG_OF
    +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;
    +
    + if (!of_match_device(eeprom_93xx46_of_table, &spi->dev))
    + return 0;
    +
    + 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");
    + goto error_free;
    + }
    +
    + 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);
    + goto error_free;
    + }
    +
    + if (of_property_read_bool(np, "read-only"))
    + pd->flags |= EE_READONLY;
    +
    + spi->dev.platform_data = pd;
    +
    + return 1;
    +
    +error_free:
    + devm_kfree(&spi->dev, pd);
    + return ret;
    +}
    +
    +#else
    +static inline int eeprom_93xx46_probe_dt(struct spi_device *spi)
    +{
    + return 0;
    +}
    +#endif
    +
    static int eeprom_93xx46_probe(struct spi_device *spi)
    {
    struct eeprom_93xx46_platform_data *pd;
    struct eeprom_93xx46_dev *edev;
    int err;

    + 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 +431,7 @@ static int eeprom_93xx46_remove(struct spi_device *spi)
    static struct spi_driver eeprom_93xx46_driver = {
    .driver = {
    .name = "93xx46",
    + .of_match_table = eeprom_93xx46_of_table,
    },
    .probe = eeprom_93xx46_probe,
    .remove = eeprom_93xx46_remove,
    --
    2.4.10


    \
     
     \ /
      Last update: 2015-11-17 05:41    [W:2.301 / U:0.216 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site