From fb032398d262ff7594c35c65b6f14897bb331a39 Mon Sep 17 00:00:00 2001 From: Duncan Laurie Date: Thu, 15 Jan 2015 15:28:46 -0800 Subject: spi: Add function to read flash status register Add a function that allows reading of the status register from the SPI chip. This can be used to determine whether write protection is enabled on the chip. BUG=chrome-os-partner:35209 BRANCH=haswell TEST=build and boot on peppy Signed-off-by: Duncan Laurie Reviewed-on: https://chromium-review.googlesource.com/240702 Reviewed-by: Shawn N (cherry picked from commit c58f17689162b291a7cdb57649a237de21b73545) Change-Id: Ib7fead2cc4ea4339ece322dd18403362c9c79c7d Signed-off-by: Patrick Georgi Original-Commit-Id: 9fbdf0d72892eef4a742a418a347ecf650c01ea5 Original-Change-Id: I2541b22c51e43f7b7542ee0f48618cf411976a98 Original-Signed-off-by: Duncan Laurie Original-Reviewed-on: https://chromium-review.googlesource.com/241128 Original-Reviewed-by: Shawn N Reviewed-on: http://review.coreboot.org/9730 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer --- src/drivers/spi/spi_flash_internal.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'src/drivers/spi/spi_flash_internal.h') diff --git a/src/drivers/spi/spi_flash_internal.h b/src/drivers/spi/spi_flash_internal.h index 6fe6c622b0..fec3dcc9cf 100644 --- a/src/drivers/spi/spi_flash_internal.h +++ b/src/drivers/spi/spi_flash_internal.h @@ -60,6 +60,9 @@ int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout); /* Erase sectors. */ int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len); +/* Read status register. */ +int spi_flash_cmd_status(struct spi_flash *flash, u8 *reg); + /* Manufacturer-specific probe functions */ struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode); struct spi_flash *spi_flash_probe_amic(struct spi_slave *spi, u8 *idcode); -- cgit v1.2.3