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linux-imx/Documentation/ABI/testing/sysfs-bus-spi-devices-spi-nor
Michael Walle 0d9270f276 mtd: spi-nor: sysfs: hide manufacturer if it is not set 
The manufacturer may be optional when pure SFDP flashes are supported.
Hide the sysfs property if no manufacturer is set.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Reviewed-by: Takahiro Kuwano <Takahiro.Kuwano@infineon.com>
Link: https://lore.kernel.org/r/20220810220654.1297699-3-michael@walle.cc
2022-11-21 15:37:15 +02:00

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What: /sys/bus/spi/devices/.../spi-nor/jedec_id Date: April 2021 KernelVersion: 5.14 Contact: linux-mtd@lists.infradead.org Description: (RO) The JEDEC ID of the SPI NOR flash as reported by the flash device.

	The attribute is not present if the flash doesn't support
	the "Read JEDEC ID" command (9Fh). This is the case for
	non-JEDEC compliant flashes.

What: /sys/bus/spi/devices/.../spi-nor/manufacturer Date: April 2021 KernelVersion: 5.14 Contact: linux-mtd@lists.infradead.org Description: (RO) Manufacturer of the SPI NOR flash.

	The attribute is not present if the flash device isn't
	known to the kernel and is only probed by its SFDP
	tables.

What: /sys/bus/spi/devices/.../spi-nor/partname Date: April 2021 KernelVersion: 5.14 Contact: linux-mtd@lists.infradead.org Description: (RO) Part name of the SPI NOR flash.

What: /sys/bus/spi/devices/.../spi-nor/sfdp Date: April 2021 KernelVersion: 5.14 Contact: linux-mtd@lists.infradead.org Description: (RO) This attribute is only present if the SPI NOR flash device supports the "Read SFDP" command (5Ah).

	If present, it contains the complete SFDP (serial flash
	discoverable parameters) binary data of the flash.