[U-Boot] [PATH v3 1/2] sf: Add status register reading support
Jagannadha Sutradharudu Teki
jagannadh.teki at gmail.com
Thu Jan 3 15:51:54 CET 2013
This patch provides support to read a flash status register.
Status register contains a control bits used to verify
the progress of flash program and erase operations.
User need to get the data through spi_flash_cmd_read_status()
based on their usage.
Signed-off-by: Jagannadha Sutradharudu Teki <jagannadh.teki at gmail.com>
---
Changes in v3:
improved coding style
drivers/mtd/spi/spi_flash.c | 8 ++++++++
drivers/mtd/spi/spi_flash_internal.h | 3 +++
2 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index 9e8939c..0f05b91 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -264,6 +264,14 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr)
return 0;
}
+int spi_flash_cmd_read_status(struct spi_flash *flash, void *data)
+{
+ u8 cmd;
+
+ cmd = CMD_READ_STATUS;
+ return spi_flash_read_common(flash, &cmd, sizeof(cmd), (void *)data, 1);
+}
+
/*
* The following table holds all device probe functions
*
diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h
index 141cfa8..8232595 100644
--- a/drivers/mtd/spi/spi_flash_internal.h
+++ b/drivers/mtd/spi/spi_flash_internal.h
@@ -77,6 +77,9 @@ static inline int spi_flash_cmd_write_disable(struct spi_flash *flash)
/* Program the status register. */
int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr);
+/* Read the status register */
+int spi_flash_cmd_read_status(struct spi_flash *flash, void *data);
+
/*
* Same as spi_flash_cmd_read() except it also claims/releases the SPI
* bus. Used as common part of the ->read() operation.
--
1.7.0.4
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