Dear Grant, Shawn,
I don't this patch is required as m25p** serial flashes are supported 
already with generic OF/SPI and OF/MTD schemes.
I have successfully used it myself on an unmodified 2.6.36.3 vanilla 
kernel on a xilinx/powerpc platform with a m25p32 part from STM.
You will find attached the corresponding working defconfig + dts files 
(appart from partitions which I didn't managed to configure properly...).
Best Regards,

Manuel


Le 25/07/2011 23:19, Grant Likely a écrit :
> On Mon, Jul 25, 2011 at 09:37:43PM +0800, Shawn Guo wrote:
>> It adds device tree probe support for m25p80 driver.
>>
>> Signed-off-by: Shawn Guo<shawn.guo@linaro.org>
>> Cc: Grant Likely<grant.likely@secretlab.ca>
>> Cc: Artem Bityutskiy<artem.bityutskiy@intel.com>
> Acked-by: Grant Likely<grant.likely@secretlab.ca>
>> ---
>>   Documentation/devicetree/bindings/mtd/st-m25p.txt |   14 ++++++++++++++
>>   drivers/mtd/devices/m25p80.c                      |   12 ++++++++++++
>>   2 files changed, 26 insertions(+), 0 deletions(-)
>>   create mode 100644 Documentation/devicetree/bindings/mtd/st-m25p.txt
>>
>> diff --git a/Documentation/devicetree/bindings/mtd/st-m25p.txt b/Documentation/devicetree/bindings/mtd/st-m25p.txt
>> new file mode 100644
>> index 0000000..a8c0485
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mtd/st-m25p.txt
>> @@ -0,0 +1,14 @@
>> +* STMicroelectronics SPI Flash
>> +
>> +Required properties:
>> +- compatible : "st,<model>", "st,m25p".
>> +
>> +Examples:
>> +
>> +flash: m25p32@1 {
>> +	#address-cells =<1>;
>> +	#size-cells =<1>;
>> +	compatible = "st,m25p32", "st,m25p";
>> +	spi-max-frequency =<20000000>;
>> +	reg =<1>;
>> +};
>> diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
>> index e6ba034..d9d4101 100644
>> --- a/drivers/mtd/devices/m25p80.c
>> +++ b/drivers/mtd/devices/m25p80.c
>> @@ -26,6 +26,7 @@
>>   #include<linux/slab.h>
>>   #include<linux/sched.h>
>>   #include<linux/mod_devicetable.h>
>> +#include<linux/of_device.h>
>>
>>   #include<linux/mtd/cfi.h>
>>   #include<linux/mtd/mtd.h>
>> @@ -767,6 +768,16 @@ static const struct spi_device_id m25p_ids[] = {
>>   };
>>   MODULE_DEVICE_TABLE(spi, m25p_ids);
>>
>> +#ifdef CONFIG_OF
>> +static const struct of_device_id m25p_dt_ids[] = {
>> +	{ .compatible = "st,m25p", },
>> +	{ /* sentinel */ }
>> +};
>> +MODULE_DEVICE_TABLE(of, m25p_dt_ids);
>> +#else
>> +#define m25p_dt_ids NULL
>> +#endif
>> +
>>   static const struct spi_device_id *__devinit jedec_probe(struct spi_device *spi)
>>   {
>>   	int			tmp;
>> @@ -986,6 +997,7 @@ static struct spi_driver m25p80_driver = {
>>   		.name	= "m25p80",
>>   		.bus	=&spi_bus_type,
>>   		.owner	= THIS_MODULE,
>> +		.of_match_table = m25p_dt_ids,
>>   	},
>>   	.id_table	= m25p_ids,
>>   	.probe	= m25p_probe,
>> -- 
>> 1.7.4.1
>>
>>
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