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authorSimon Glass <sjg@chromium.org>2013-03-11 06:08:02 +0000
committerSimon Glass <sjg@chromium.org>2013-03-19 08:45:36 -0700
commitb5aec1424d191c51f694ba85d5577e7a635363d9 (patch)
tree0e1c5d4921e0e337dcffb6e4950210eff75806f1 /drivers
parentd3504fee73ec626117427afa08116d1dde21ba9d (diff)
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sf: Add spi_flash_alloc() to create a new SPI flash struct
At present it is difficult to extend the SPI flash structure since all devices allocate it themselves, and few of them zero all fields. Add a new function spi_flash_alloc() which can be used by SPI devices to perform this allocation, and thus ensure that all devices can better cope with SPI structure changes. Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mtd/spi/spi_flash.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index 00aece9..17f3d3c 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -401,6 +401,31 @@ err_claim_bus:
return NULL;
}
+void *spi_flash_do_alloc(int offset, int size, struct spi_slave *spi,
+ const char *name)
+{
+ struct spi_flash *flash;
+ void *ptr;
+
+ ptr = malloc(size);
+ if (!ptr) {
+ debug("SF: Failed to allocate memory\n");
+ return NULL;
+ }
+ memset(ptr, '\0', size);
+ flash = (struct spi_flash *)(ptr + offset);
+
+ /* Set up some basic fields - caller will sort out sizes */
+ flash->spi = spi;
+ flash->name = name;
+
+ flash->read = spi_flash_cmd_read_fast;
+ flash->write = spi_flash_cmd_write_multi;
+ flash->erase = spi_flash_cmd_erase;
+
+ return flash;
+}
+
void spi_flash_free(struct spi_flash *flash)
{
spi_free_slave(flash->spi);