sf: Add a method to obtain the block-protect setting
It is useful to obtain the block-protect setting of the SPI flash, so we know whether it is fully open or (perhaps partially) write-protected. Add a method for this. Update the sandbox driver to process this operation and add a test. Signed-off-by: Simon Glass <sjg@chromium.org>
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@@ -112,6 +112,19 @@ struct dm_spi_flash_ops {
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int (*write)(struct udevice *dev, u32 offset, size_t len,
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const void *buf);
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int (*erase)(struct udevice *dev, u32 offset, size_t len);
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/**
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* get_sw_write_prot() - Check state of software write-protect feature
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*
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* SPI flash chips can lock a region of the flash defined by a
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* 'protected area'. This function checks if this protected area is
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* defined.
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*
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* @dev: SPI flash device
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* @return 0 if no region is write-protected, 1 if a region is
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* write-protected, -ENOSYS if the driver does not implement this,
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* other -ve value on error
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*/
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int (*get_sw_write_prot)(struct udevice *dev);
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};
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/* Access the serial operations for a device */
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@@ -153,6 +166,20 @@ int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
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*/
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int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len);
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/**
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* spl_flash_get_sw_write_prot() - Check state of software write-protect feature
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*
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* SPI flash chips can lock a region of the flash defined by a
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* 'protected area'. This function checks if this protected area is
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* defined.
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*
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* @dev: SPI flash device
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* @return 0 if no region is write-protected, 1 if a region is
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* write-protected, -ENOSYS if the driver does not implement this,
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* other -ve value on error
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*/
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int spl_flash_get_sw_write_prot(struct udevice *dev);
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int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
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unsigned int max_hz, unsigned int spi_mode,
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struct udevice **devp);
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