We need the SPI NOR child node to store some specific features, such as the
dummy cycles for the DDR Quad read.
But now, we only have the @dev field in the spi_nor{}. The @dev may points to a
spi_device{} for m25p80, while it may points to a platform_deivice{} for the
SPI NOR controller, such as fsl_quadspi.c.
It is not convenient for us to get come information from the SPI NOR flash.
This patch adds a new field @np to spi_nor{}, it points to the child node for
the SPI NOR flash.
Signed-off-by: Huang Shijie <b32955@xxxxxxxxxxxxx>
---
drivers/mtd/devices/m25p80.c | 1 +
drivers/mtd/spi-nor/spi-nor.c | 2 +-
include/linux/mtd/spi-nor.h | 3 +++
3 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 3a1d9e0..f996c3a 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -215,6 +215,7 @@ static int m25p_probe(struct spi_device *spi)
nor->read_reg = m25p80_read_reg;
nor->dev = &spi->dev;
+ nor->np = spi->dev.of_node;
nor->mtd = &flash->mtd;
nor->priv = flash;
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 1a12f81..f374e44 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -891,7 +891,7 @@ int spi_nor_scan(struct spi_nor *nor, const struct spi_device_id *id,
struct flash_platform_data *data;
struct device *dev = nor->dev;
struct mtd_info *mtd = nor->mtd;
- struct device_node *np = dev->of_node;
+ struct device_node *np = nor->np;
int ret;
int i;
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index 5324184..48fe9fc 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -117,6 +117,8 @@ enum spi_nor_ops {
* @mtd: point to a mtd_info structure
* @lock: the lock for the read/write/erase/lock/unlock operations
* @dev: point to a spi device, or a spi nor controller device.
+ * @np: If exit, it points to a device_node which stands for the
+ * SPI NOR flash child node.
* @page_size: the page size of the SPI NOR
* @addr_width: number of address bytes
* @erase_opcode: the opcode for erasing a sector
@@ -148,6 +150,7 @@ struct spi_nor {
struct mtd_info *mtd;
struct mutex lock;
struct device *dev;
+ struct device_node *np;
u32 page_size;
u8 addr_width;
u8 erase_opcode;
--
1.7.2.rc3
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