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mtd: dataflash: add device tree probe support 

It adds device tree probe support for mtd_dataflash driver.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
This commit is contained in:
Shawn Guo 2011-07-15 16:38:56 +08:00 committed by Artem Bityutskiy
parent f3c8cfc237
commit b94e757c4b
2 changed files with 30 additions and 2 deletions
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14
Documentation/devicetree/bindings/mtd/atmel-dataflash.txt Normal file
View File

@ -0,0 +1,14 @@
* Atmel Data Flash
Required properties:
- compatible : "atmel,<model>", "atmel,<series>", "atmel,dataflash".
Example:
flash@1 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "atmel,at45db321d", "atmel,at45", "atmel,dataflash";
spi-max-frequency = <25000000>;
reg = <1>;
};

18
drivers/mtd/devices/mtd_dataflash.c
View File

@ -17,6 +17,8 @@
#include <linux/mutex.h>
#include <linux/err.h>
#include <linux/math64.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/spi/spi.h>
#include <linux/spi/flash.h>
@ -24,7 +26,6 @@
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
/*
* DataFlash is a kind of SPI flash. Most AT45 chips have two buffers in
* each chip, which may be used for double buffered I/O; but this driver
@ -98,6 +99,16 @@ struct dataflash {
struct mtd_info mtd;
};
#ifdef CONFIG_OF
static const struct of_device_id dataflash_dt_ids[] = {
{ .compatible = "atmel,at45", },
{ .compatible = "atmel,dataflash", },
{ /* sentinel */ }
};
#else
#define dataflash_dt_ids NULL
#endif
/* ......................................................................... */
/*
@ -634,6 +645,7 @@ add_dataflash_otp(struct spi_device *spi, char *name,
{
struct dataflash *priv;
struct mtd_info *device;
struct mtd_part_parser_data ppdata;
struct flash_platform_data *pdata = spi->dev.platform_data;
char *otp_tag = "";
int err = 0;
@ -675,7 +687,8 @@ add_dataflash_otp(struct spi_device *spi, char *name,
pagesize, otp_tag);
dev_set_drvdata(&spi->dev, priv);
err = mtd_device_parse_register(device, NULL, 0,
ppdata.of_node = spi->dev.of_node;
err = mtd_device_parse_register(device, NULL, &ppdata,
pdata ? pdata->parts : NULL,
pdata ? pdata->nr_parts : 0);
@ -926,6 +939,7 @@ static struct spi_driver dataflash_driver = {
.name = "mtd_dataflash",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
.of_match_table = dataflash_dt_ids,
},
.probe = dataflash_probe,