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Date: Wed, 18 Nov 2015 22:29:39 -0500 From: Cory Tusar <cory.tusar@...1solutions.com> To: robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com, ijc+devicetree@...lion.org.uk, galak@...eaurora.org, agust@...x.de, gregkh@...uxfoundation.org Cc: jic23@...nel.org, vz@...ia.com, broonie@...nel.org, afd@...com, andrew@...n.ch, Chris.Healy@....aero, Keith.Vennel@....aero, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, Cory Tusar <cory.tusar@...1solutions.com> Subject: [PATCH v2 3/5] 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@...1solutions.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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