diff options
| author | Oder Chiou <oder_chiou@realtek.com> | 2025-12-31 05:35:44 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2026-01-05 16:18:49 +0300 |
| commit | ee69f55eb183efb43da14cdad72910b1b1cc2932 (patch) | |
| tree | 43f58ef0d6c9ec680139a3248fbf8246a0884d44 | |
| parent | 9ace4753a5202b02191d54e9fdf7f9e3d02b85eb (diff) | |
| download | linux-ee69f55eb183efb43da14cdad72910b1b1cc2932.tar.xz | |
spi: export of_find_spi_controller_by_node()
Some devices are primarily described on another bus (e.g. I2C) but also
have an additional SPI connection that serves as a transport for
firmware loading. Export of_find_spi_controller_by_node() so drivers can
obtain the SPI controller referenced by a DT phandle.
Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://patch.msgid.link/0e572a00aa305e588357162d400ba9472ce56dd3.1767148150.git.oder_chiou@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | drivers/spi/spi.c | 3 | ||||
| -rw-r--r-- | include/linux/spi/spi.h | 9 |
2 files changed, 11 insertions, 1 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index e25df9990f82..ecb5281b04a2 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -4771,7 +4771,7 @@ static struct spi_device *of_find_spi_device_by_node(struct device_node *node) } /* The spi controllers are not using spi_bus, so we find it with another way */ -static struct spi_controller *of_find_spi_controller_by_node(struct device_node *node) +struct spi_controller *of_find_spi_controller_by_node(struct device_node *node) { struct device *dev; @@ -4784,6 +4784,7 @@ static struct spi_controller *of_find_spi_controller_by_node(struct device_node /* Reference got in class_find_device */ return container_of(dev, struct spi_controller, dev); } +EXPORT_SYMBOL_GPL(of_find_spi_controller_by_node); static int of_spi_notify(struct notifier_block *nb, unsigned long action, void *arg) diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index cb2c2df31089..e6fdaf02386c 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -882,6 +882,15 @@ extern int devm_spi_register_controller(struct device *dev, struct spi_controller *ctlr); extern void spi_unregister_controller(struct spi_controller *ctlr); +#if IS_ENABLED(CONFIG_OF_DYNAMIC) +extern struct spi_controller *of_find_spi_controller_by_node(struct device_node *node); +#else +static inline struct spi_controller *of_find_spi_controller_by_node(struct device_node *node) +{ + return NULL; +} +#endif + #if IS_ENABLED(CONFIG_ACPI) && IS_ENABLED(CONFIG_SPI_MASTER) extern struct spi_controller *acpi_spi_find_controller_by_adev(struct acpi_device *adev); extern struct spi_device *acpi_spi_device_alloc(struct spi_controller *ctlr, |