@@ -307,6 +307,14 @@ int spi_flash_cmd_write_config(struct spi_flash *flash, u8 cr)
return 0;
}
+int spi_flash_cmd_read_config(struct spi_flash *flash, void *data)
+{
+ u8 cmd;
+
+ cmd = CMD_READ_CONFIG;
+ return spi_flash_read_common(flash, &cmd, sizeof(cmd), (void *)data, 1);
+}
+
/*
* The following table holds all device probe functions
*
@@ -22,6 +22,7 @@
#define CMD_PAGE_PROGRAM 0x02
#define CMD_WRITE_DISABLE 0x04
#define CMD_READ_STATUS 0x05
+#define CMD_READ_CONFIG 0x35
#define CMD_WRITE_ENABLE 0x06
#define CMD_ERASE_4K 0x20
#define CMD_ERASE_32K 0x52
@@ -83,6 +84,9 @@ int spi_flash_cmd_read_status(struct spi_flash *flash, void *data);
/* Program the config register. */
int spi_flash_cmd_write_config(struct spi_flash *flash, u8 cr);
+/* Read the config register */
+int spi_flash_cmd_read_config(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.
This patch provides support to read a flash config register. Config register contains a control bits used to verify the different configurations and security features of a device. User need to get the data through spi_flash_cmd_read_config() based on their usage. Signed-off-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com> --- Changes in v3: improved coding style drivers/mtd/spi/spi_flash.c | 8 ++++++++ drivers/mtd/spi/spi_flash_internal.h | 4 ++++ 2 files changed, 12 insertions(+), 0 deletions(-)