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drivers/spi: Add controller protection type

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Some SPI controllers support both READ and WRITE protection
add a variable to the protect API for the callers to specify
the kind of protection they want (Read/Write/Both).
Also, update the callers and protect API implementation.

BUG=None
BRANCH=None
TEST=test that the mrc cache is protected as expected on soraka.
Also tried if the read protection is applied correctly.

Change-Id: I093884c4768b08a378f21242ac82e430ac013d15
Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Reviewed-on: https://review.coreboot.org/c/30559
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
This commit is contained in:
Rizwan Qureshi
2018-12-31 15:19:16 +05:30
committed by Patrick Georgi
parent afe15f0a34
commit f9f5093644
8 changed files with 82 additions and 14 deletions
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3
src/include/spi_flash.h
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@@ -207,7 +207,8 @@ const struct spi_flash *boot_device_spi_flash(void);
/* Protect a region of spi flash using its controller, if available. Returns
* < 0 on error, else 0 on success. */
int spi_flash_ctrlr_protect_region(const struct spi_flash *flash,
const struct region *region);
const struct region *region,
const enum ctrlr_prot_type type);
/*
* This function is provided to support spi flash command-response transactions.