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drivers/spi: provide a mechanism to obtain the SPI flash boot device 

The MRC cache wants to be able to access the SPI flash boot device.
Allow an easy way to provide that so that there isn't duplicate
spi_flash objects representing the same device.

BUG=chrome-os-partner:56151

Change-Id: Iba92e8bb8a6060cdd327b10f5f8ec23ac61101e7
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/17715
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Aaron Durbin 2016-12-03 17:04:06 -06:00
parent cd0bc987be
commit 305c0cafaa
2 changed files with 10 additions and 0 deletions
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6
src/drivers/spi/boot_device_rw_nommap.c
View File

@ -95,3 +95,9 @@ const struct region_device *boot_device_rw(void)
return &spi_rw;
}
const struct spi_flash *boot_device_spi_flash(void)
{
boot_device_rw_init();
return car_get_var(sfg);
}

4
src/include/spi_flash.h
View File

@ -88,4 +88,8 @@ int spi_flash_volatile_group_end(const struct spi_flash *flash);
int chipset_volatile_group_begin(const struct spi_flash *flash);
int chipset_volatile_group_end(const struct spi_flash *flash);
/* Return spi_flash object reference for the boot device. This is only valid
* if CONFIG_BOOT_DEVICE_SPI_FLASH is enabled. */
const struct spi_flash *boot_device_spi_flash(void);
#endif /* _SPI_FLASH_H_ */