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Commit b94e757c authored by Shawn Guo's avatar Shawn Guo Committed by Artem Bityutskiy
Browse files

mtd: dataflash: add device tree probe support 



It adds device tree probe support for mtd_dataflash driver.

Signed-off-by: default avatarShawn Guo <shawn.guo@linaro.org>
Signed-off-by: default avatarArtem Bityutskiy <artem.bityutskiy@intel.com>
parent f3c8cfc2

Documentation/devicetree/bindings/mtd/atmel-dataflash.txt

0 → 100644
+14 −0
Original line number Diff line number Diff line 
* 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>;

};

drivers/mtd/devices/mtd_dataflash.c

+16 −2
Original line number Diff line number Diff line
@@ -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,