From: Michael Walle <michael@walle.cc>
To: Tudor Ambarus <tudor.ambarus@microchip.com>,
Pratyush Yadav <p.yadav@ti.com>, Michael Walle <michael@walle.cc>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>
Cc: linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org
Subject: [PATCH 1/6] mtd: spi-nor: hide jedec_id sysfs attribute if not present
Date: Fri, 13 May 2022 15:35:15 +0200 [thread overview]
Message-ID: <20220513133520.3945820-2-michael@walle.cc> (raw)
In-Reply-To: <20220513133520.3945820-1-michael@walle.cc>
Some non-jedec compliant flashes (like the Everspin flashes) don't have
an ID at all. Hide the attribute in this case.
Fixes: 36ac02286265 ("mtd: spi-nor: add initial sysfs support")
Signed-off-by: Michael Walle <michael@walle.cc>
---
.../ABI/testing/sysfs-bus-spi-devices-spi-nor | 3 +++
drivers/mtd/spi-nor/sysfs.c | 14 ++++++++++++++
2 files changed, 17 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-spi-devices-spi-nor b/Documentation/ABI/testing/sysfs-bus-spi-devices-spi-nor
index d76cd3946434..e9ef69aef20b 100644
--- a/Documentation/ABI/testing/sysfs-bus-spi-devices-spi-nor
+++ b/Documentation/ABI/testing/sysfs-bus-spi-devices-spi-nor
@@ -5,6 +5,9 @@ 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
diff --git a/drivers/mtd/spi-nor/sysfs.c b/drivers/mtd/spi-nor/sysfs.c
index 9aec9d8a98ad..4c3b351aef24 100644
--- a/drivers/mtd/spi-nor/sysfs.c
+++ b/drivers/mtd/spi-nor/sysfs.c
@@ -67,6 +67,19 @@ static struct bin_attribute *spi_nor_sysfs_bin_entries[] = {
NULL
};
+static umode_t spi_nor_sysfs_is_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
+{
+ struct spi_device *spi = to_spi_device(kobj_to_dev(kobj));
+ struct spi_mem *spimem = spi_get_drvdata(spi);
+ struct spi_nor *nor = spi_mem_get_drvdata(spimem);
+
+ if (attr == &dev_attr_jedec_id.attr && !nor->info->id_len)
+ return 0;
+
+ return 0444;
+}
+
static umode_t spi_nor_sysfs_is_bin_visible(struct kobject *kobj,
struct bin_attribute *attr, int n)
{
@@ -82,6 +95,7 @@ static umode_t spi_nor_sysfs_is_bin_visible(struct kobject *kobj,
static const struct attribute_group spi_nor_sysfs_group = {
.name = "spi-nor",
+ .is_visible = spi_nor_sysfs_is_visible,
.is_bin_visible = spi_nor_sysfs_is_bin_visible,
.attrs = spi_nor_sysfs_entries,
.bin_attrs = spi_nor_sysfs_bin_entries,
--
2.30.2
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Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/
next prev parent reply other threads:[~2022-05-13 13:35 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-13 13:35 [PATCH 0/6] mtd: spi-nor: generic flash driver Michael Walle
2022-05-13 13:35 ` Michael Walle [this message]
2022-07-26 10:00 ` [PATCH 1/6] mtd: spi-nor: hide jedec_id sysfs attribute if not present Takahiro Kuwano
2022-05-13 13:35 ` [PATCH 2/6] mtd: spi-nor: sysfs: hide manufacturer if it is not set Michael Walle
2022-07-26 10:04 ` Takahiro Kuwano
2022-05-13 13:35 ` [PATCH 3/6] mtd: spi-nor: remember full JEDEC flash ID Michael Walle
2022-07-29 1:00 ` Takahiro Kuwano
2022-05-13 13:35 ` [PATCH 4/6] mtd: spi-nor: move function declaration out of sfdp.h Michael Walle
2022-07-26 23:41 ` Takahiro Kuwano
2022-05-13 13:35 ` [PATCH 5/6] mtd: spi-nor: add generic flash driver Michael Walle
2022-05-13 14:47 ` kernel test robot
2022-07-21 9:32 ` Biju Das
2022-07-21 9:48 ` Michael Walle
2022-07-21 9:52 ` Biju Das
2022-10-28 18:00 ` Biju Das
2022-07-28 3:28 ` Tudor.Ambarus
2022-07-29 1:40 ` Takahiro Kuwano
2022-05-13 13:35 ` [PATCH 6/6] mtd: spi-nor: sysfs: print JEDEC ID for " Michael Walle
2022-07-29 1:25 ` Takahiro Kuwano
2022-07-26 8:06 ` [PATCH 0/6] mtd: spi-nor: " Tudor.Ambarus
2022-07-29 1:52 ` Takahiro Kuwano
2022-07-29 5:34 ` Tudor.Ambarus
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