[PATCH 1/1] mtd: m25p80 -- parse partitions from OF tree

[Jonas Bonn <jonas-A9uVI2HLR7kOP4wsBPIw7w@public.gmane.org>]

It needs to be possible to define the partitions of an MTD device from an OF
devicetree.  This patch adds a call to of_mtd_parse_partitions if:

i)   there are no commandline partitions defined
ii)  there are no partitions set up by platform_data
iii) and an of_node is present on the device

This permits the following devicetree structure:

flash0: mtd@0 {
	compatible = "st,m25p10";
	reg = <0>;
	spi-max-frequency = <100000000>;

	#address-cells = <1>;
	#size-cells = <1>;

	partition@0 {
		label = "bootloader";
		reg = <0x00000000 0x00018000>;
		read-only;
	}

	partition@18000 {
		label = "data";
		reg = <0x00018000 0x00008000>;
	};
};

Signed-off-by: Jonas Bonn <jonas-A9uVI2HLR7kOP4wsBPIw7w@public.gmane.org>
---
 drivers/mtd/devices/m25p80.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 6f512b5..a349498 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -924,6 +924,10 @@ static int __devinit m25p_probe(struct spi_device *spi)
 			nr_parts = data->nr_parts;
 		}
 
+		if (nr_parts <= 0 && spi->dev.of_node) {
+			nr_parts = of_mtd_parse_partitions(&spi->dev, spi->dev.of_node, &parts);
+		}
+
 		if (nr_parts > 0) {
 			for (i = 0; i < nr_parts; i++) {
 				DEBUG(MTD_DEBUG_LEVEL2, "partitions[%d] = "
-- 
1.7.1