Generic function for all spi-flash register reads.
Signed-off-by: Jagan Teki <jt...@openedev.com>
---
Changes for v3:
- none
Changes for v2:
- none
drivers/mtd/spi/sf.c | 23 +++++++++++++++++++++++
drivers/mtd/spi/sf_internal.h | 3 +++
2 files changed, 26 insertions(+)
diff --git a/drivers/mtd/spi/sf.c b/drivers/mtd/spi/sf.c
index 664e860..cb36946 100644
--- a/drivers/mtd/spi/sf.c
+++ b/drivers/mtd/spi/sf.c
@@ -9,6 +9,7 @@
#include <common.h>
#include <spi.h>
+#include <spi_flash.h>
static int spi_flash_read_write(struct spi_slave *spi,
const u8 *cmd, size_t cmd_len,
@@ -56,3 +57,25 @@ int spi_flash_cmd_write(struct spi_slave *spi, const u8
*cmd, size_t cmd_len,
{
return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len);
}
+
+int flash_read_reg(struct spi_flash *flash, u8 cmd, u8 *val, int len)
+{
+ struct spi_slave *spi = flash->spi;
+ int ret;
+
+ ret = spi_claim_bus(spi);
+ if (ret < 0) {
+ debug("SF: unable to claim SPI bus\n");
+ return ret;
+ }
+
+ ret = spi_flash_read_write(spi, &cmd, 1, NULL, val, len);
+ if (ret < 0) {
+ debug("SF: error %d reading register %x\n", ret, cmd);
+ return ret;
+ }
+
+ spi_release_bus(spi);
+
+ return ret;
+}
diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h
index 8a3e5ec..14b8b55 100644
--- a/drivers/mtd/spi/sf_internal.h
+++ b/drivers/mtd/spi/sf_internal.h
@@ -156,6 +156,9 @@ int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void
*response, size_t len);
int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
size_t cmd_len, void *data, size_t data_len);
+/* Read flash register - common call for all flash register reads */
+int flash_read_reg(struct spi_flash *flash, u8 cmd, u8 *val, int len);
+
/*
* Send a multi-byte command to the device followed by (optional)
* data. Used for programming the flash array, etc.
--
1.9.1
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