This is a note to let you know that I've just added the patch titled
spi: spidev: Replace OF specific code by device property API
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
spi-spidev-replace-of-specific-code-by-device-proper.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 58ad2278ca73786059d29fbffbe0b36f141adc98
Author: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Date: Wed Mar 23 16:02:15 2022 +0200
spi: spidev: Replace OF specific code by device property API
[ Upstream commit 88a285192084edab6657e819f7f130f9cfcb0579 ]
Instead of calling the OF specific APIs, use device property ones.
It also prevents misusing PRP0001 in ACPI when trying to instantiate
spidev directly. We only support special SPI test devices there.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220323140215.2568-4-andriy.shevchenko@xxxxxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Stable-dep-of: fc28d1c1fe3b ("spi: spidev: add correct compatible for Rohm BH2228FV")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c
index 8c69ab348a7f7..4a19c2142e474 100644
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -20,8 +20,6 @@
#include <linux/property.h>
#include <linux/slab.h>
#include <linux/compat.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
#include <linux/spi/spi.h>
#include <linux/spi/spidev.h>
@@ -696,20 +694,31 @@ static const struct spi_device_id spidev_spi_ids[] = {
};
MODULE_DEVICE_TABLE(spi, spidev_spi_ids);
-#ifdef CONFIG_OF
+/*
+ * spidev should never be referenced in DT without a specific compatible string,
+ * it is a Linux implementation thing rather than a description of the hardware.
+ */
+static int spidev_of_check(struct device *dev)
+{
+ if (device_property_match_string(dev, "compatible", "spidev") < 0)
+ return 0;
+
+ dev_err(dev, "spidev listed directly in DT is not supported\n");
+ return -EINVAL;
+}
+
static const struct of_device_id spidev_dt_ids[] = {
- { .compatible = "rohm,dh2228fv" },
- { .compatible = "lineartechnology,ltc2488" },
- { .compatible = "semtech,sx1301" },
- { .compatible = "lwn,bk4" },
- { .compatible = "dh,dhcom-board" },
- { .compatible = "menlo,m53cpld" },
- { .compatible = "cisco,spi-petra" },
- { .compatible = "micron,spi-authenta" },
+ { .compatible = "rohm,dh2228fv", .data = &spidev_of_check },
+ { .compatible = "lineartechnology,ltc2488", .data = &spidev_of_check },
+ { .compatible = "semtech,sx1301", .data = &spidev_of_check },
+ { .compatible = "lwn,bk4", .data = &spidev_of_check },
+ { .compatible = "dh,dhcom-board", .data = &spidev_of_check },
+ { .compatible = "menlo,m53cpld", .data = &spidev_of_check },
+ { .compatible = "cisco,spi-petra", .data = &spidev_of_check },
+ { .compatible = "micron,spi-authenta", .data = &spidev_of_check },
{},
};
MODULE_DEVICE_TABLE(of, spidev_dt_ids);
-#endif
/* Dummy SPI devices not to be used in production systems */
static int spidev_acpi_check(struct device *dev)
@@ -741,16 +750,6 @@ static int spidev_probe(struct spi_device *spi)
int status;
unsigned long minor;
- /*
- * spidev should never be referenced in DT without a specific
- * compatible string, it is a Linux implementation thing
- * rather than a description of the hardware.
- */
- if (spi->dev.of_node && of_device_is_compatible(spi->dev.of_node, "spidev")) {
- dev_err(&spi->dev, "spidev listed directly in DT is not supported\n");
- return -EINVAL;
- }
-
match = device_get_match_data(&spi->dev);
if (match) {
status = match(&spi->dev);
@@ -827,7 +826,7 @@ static int spidev_remove(struct spi_device *spi)
static struct spi_driver spidev_spi_driver = {
.driver = {
.name = "spidev",
- .of_match_table = of_match_ptr(spidev_dt_ids),
+ .of_match_table = spidev_dt_ids,
.acpi_match_table = spidev_acpi_ids,
},
.probe = spidev_probe,
