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authorHuang Shijie <b32955@freescale.com>2014-02-24 18:37:37 +0800
committerBrian Norris <computersforpeace@gmail.com>2014-04-14 11:22:58 -0700
commitb199489d37b21c5e294f95bf265acc5dde3fc3a2 (patch)
treea498f39ae5035cdb9091eb96d95662db3fc54a82 /include/linux/mtd
parent6e602ef73334550bbbb8be1041a3ce6eecbd42f1 (diff)
mtd: spi-nor: add the framework for SPI NOR
This patch cloned most of the m25p80.c. In theory, it adds a new spi-nor layer. Before this patch, the layer is like: MTD ------------------------ m25p80 ------------------------ spi bus driver ------------------------ SPI NOR chip After this patch, the layer is like: MTD ------------------------ spi-nor ------------------------ m25p80 ------------------------ spi bus driver ------------------------ SPI NOR chip With the spi-nor controller driver(Freescale Quadspi), it looks like: MTD ------------------------ spi-nor ------------------------ fsl-quadspi ------------------------ SPI NOR chip New APIs: spi_nor_scan: used to scan a spi-nor flash. Signed-off-by: Huang Shijie <b32955@freescale.com> Acked-by: Marek Vasut <marex@denx.de> [Brian: rebased to include additional m25p_ids[] entry] Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'include/linux/mtd')
-rw-r--r--include/linux/mtd/spi-nor.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index 3a3c3872c8cd..16d8409abcdc 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -162,4 +162,24 @@ struct spi_nor {
void *priv;
};
+
+/**
+ * spi_nor_scan() - scan the SPI NOR
+ * @nor: the spi_nor structure
+ * @id: the spi_device_id provided by the driver
+ * @mode: the read mode supported by the driver
+ *
+ * The drivers can use this fuction to scan the SPI NOR.
+ * In the scanning, it will try to get all the necessary information to
+ * fill the mtd_info{} and the spi_nor{}.
+ *
+ * The board may assigns a spi_device_id with @id which be used to compared with
+ * the spi_device_id detected by the scanning.
+ *
+ * Return: 0 for success, others for failure.
+ */
+int spi_nor_scan(struct spi_nor *nor, const struct spi_device_id *id,
+ enum read_mode mode);
+extern const struct spi_device_id spi_nor_ids[];
+
#endif