From ee69f55eb183efb43da14cdad72910b1b1cc2932 Mon Sep 17 00:00:00 2001 From: Oder Chiou Date: Wed, 31 Dec 2025 10:35:44 +0800 Subject: 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 Reviewed-by: Cezary Rojewski Link: https://patch.msgid.link/0e572a00aa305e588357162d400ba9472ce56dd3.1767148150.git.oder_chiou@realtek.com Signed-off-by: Mark Brown --- include/linux/spi/spi.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include/linux/spi') 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, -- cgit v1.2.3 From 037f8d896688bf3384eb6bf34e24e8fbc9f6e02d Mon Sep 17 00:00:00 2001 From: Oder Chiou Date: Wed, 31 Dec 2025 10:36:49 +0800 Subject: spi: change of_find_spi_controller_by_node() gating to CONFIG_OF Currently, the helper of_find_spi_controller_by_node() is gated under CONFIG_OF_DYNAMIC. This prevents drivers from using it in all CONFIG_OF configurations. This patch moves the gating to CONFIG_OF, keeping the inline fallback returning NULL when Device Tree support is disabled. Signed-off-by: Oder Chiou Link: https://patch.msgid.link/6d8ae977d9f4726ea23ad5382638750593f9a2e4.1767148150.git.oder_chiou@realtek.com Signed-off-by: Mark Brown --- drivers/spi/spi.c | 20 +++++++++++--------- include/linux/spi/spi.h | 2 +- 2 files changed, 12 insertions(+), 10 deletions(-) (limited to 'include/linux/spi') diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index ecb5281b04a2..2badacc7a91c 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -4761,15 +4761,7 @@ EXPORT_SYMBOL_GPL(spi_write_then_read); /*-------------------------------------------------------------------------*/ -#if IS_ENABLED(CONFIG_OF_DYNAMIC) -/* Must call put_device() when done with returned spi_device device */ -static struct spi_device *of_find_spi_device_by_node(struct device_node *node) -{ - struct device *dev = bus_find_device_by_of_node(&spi_bus_type, node); - - return dev ? to_spi_device(dev) : NULL; -} - +#if IS_ENABLED(CONFIG_OF) /* The spi controllers are not using spi_bus, so we find it with another way */ struct spi_controller *of_find_spi_controller_by_node(struct device_node *node) { @@ -4785,6 +4777,16 @@ struct spi_controller *of_find_spi_controller_by_node(struct device_node *node) return container_of(dev, struct spi_controller, dev); } EXPORT_SYMBOL_GPL(of_find_spi_controller_by_node); +#endif + +#if IS_ENABLED(CONFIG_OF_DYNAMIC) +/* Must call put_device() when done with returned spi_device device */ +static struct spi_device *of_find_spi_device_by_node(struct device_node *node) +{ + struct device *dev = bus_find_device_by_of_node(&spi_bus_type, node); + + return dev ? to_spi_device(dev) : NULL; +} 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 e6fdaf02386c..8bc616b00343 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -882,7 +882,7 @@ 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) +#if IS_ENABLED(CONFIG_OF) 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) -- cgit v1.2.3