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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
This commit is contained in:
Michael Walle 2022-08-11 00:06:49 +02:00 committed by Lili Li
parent bf95c8b696
commit d71b22c380
2 changed files with 5 additions and 0 deletions
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3
Documentation/ABI/testing/sysfs-bus-spi-devices-spi-nor
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@ -15,6 +15,9 @@ 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

2
drivers/mtd/spi-nor/sysfs.c
View File

@ -74,6 +74,8 @@ static umode_t spi_nor_sysfs_is_visible(struct kobject *kobj,
struct spi_mem *spimem = spi_get_drvdata(spi);
struct spi_nor *nor = spi_mem_get_drvdata(spimem);
if (attr == &dev_attr_manufacturer.attr && !nor->manufacturer)
return 0;
if (attr == &dev_attr_jedec_id.attr && !nor->info->id_len)
return 0;