[U-Boot] [PATCH v7 30/34] sf: dataflash: Move flash id detection into jedec_probe

Jagan Teki
2015-11-26T12:04:14Z

Flash id detection should be the first step to enumerate
the connected flash on the board, once ie done checking
with respective id codes locally in the driver all this
should be part of jedec_probe instead of id detection and
validated through flash_info{} table separatly.

Cc: Haikun Wang <haikun.wang@freescale.com>
Signed-off-by: Jagan Teki <jteki@openedev.com>
---
drivers/mtd/spi/sf_dataflash.c | 19 ++++++++++---------
1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/drivers/mtd/spi/sf_dataflash.c b/drivers/mtd/spi/sf_dataflash.c
index 6a9dfef..7c6c8d2 100644
--- a/drivers/mtd/spi/sf_dataflash.c
+++ b/drivers/mtd/spi/sf_dataflash.c
@@ -501,9 +501,10 @@ static struct flash_info dataflash_data[] = {
{ "at45db642d", 0x1f2800, 8192, 1024, 10, SUP_POW2PS | IS_POW2PS},
};

-static struct flash_info *jedec_probe(struct spi_slave *spi, u8 *id)
+static struct flash_info *jedec_probe(struct spi_slave *spi)
{
int tmp;
+ uint8_t id[5];
uint32_t jedec;
struct flash_info *info;
int status;
@@ -517,6 +518,11 @@ static struct flash_info *jedec_probe(struct spi_slave *spi, u8 *id)
* That's not an error; only rev C and newer chips handle it, and
* only Atmel sells these chips.
*/
+ tmp = spi_flash_cmd(spi, CMD_READ_ID, id, sizeof(id));
+ if (tmp < 0) {
+ printf("dataflash: error %d reading JEDEC ID\n", tmp);
+ return ERR_PTR(tmp);
+ }
if (id[0] != 0x1f)
return NULL;

@@ -580,7 +586,6 @@ static int spi_dataflash_probe(struct udevice *dev)
struct spi_slave *spi = dev_get_parent_priv(dev);
struct spi_flash *spi_flash;
struct flash_info *info;
- u8 idcode[5];
int ret, status = 0;

spi_flash = dev_get_uclass_priv(dev);
@@ -591,12 +596,6 @@ static int spi_dataflash_probe(struct udevice *dev)
if (ret)
return ret;

- ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode));
- if (ret) {
- printf("SPI DataFlash: Failed to get idcodes\n");
- goto err_read_cmd;
- }
-
/*
* Try to detect dataflash by JEDEC ID.
* If it succeeds we know we have either a C or D part.
@@ -604,7 +603,9 @@ static int spi_dataflash_probe(struct udevice *dev)
* Both support the security register, though with different
* write procedures.
*/
- info = jedec_probe(spi, idcode);
+ info = jedec_probe(spi);
+ if (IS_ERR(info))
+ return PTR_ERR(info);
if (info != NULL)
add_dataflash(dev, info->name, info->nr_pages,
info->pagesize, info->pageoffset,
--
1.9.1