spi25: Introduce spi_simple_write_cmd()

spi_simple_write_cmd() executes WREN plus a single byte write and polls
WIP afterwards. It's used to replace current spi_erase_chip_*() imple-
mentations.

Change-Id: Ib244356fa471e15863b52e6037899d19113cb4a9
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/22382
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/flash.h b/flash.h
index 62f2e344c..b18d698d8 100644
--- a/flash.h
+++ b/flash.h
@@ -369,6 +369,7 @@ struct spi_command {
 	const unsigned char *writearr;
 	unsigned char *readarr;
 };
+#define NULL_SPI_CMD { 0, 0, NULL, NULL, }
 int spi_send_command(struct flashctx *flash, unsigned int writecnt, unsigned int readcnt, const unsigned char *writearr, unsigned char *readarr);
 int spi_send_multicommand(struct flashctx *flash, struct spi_command *cmds);
 uint32_t spi_get_valid_read_addr(struct flashctx *flash);