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- From 0eda4c5c7704363f665f4ccf0327349faad245a4 Mon Sep 17 00:00:00 2001
- From: Caleb Connolly <[email protected]>
- Date: Fri, 29 Apr 2022 23:08:56 +0100
- Subject: [PATCH] spmi: add a helper to look up an SPMI device from a device
- node
- The helper function spmi_device_from_of() takes a device node and
- returns the SPMI device associated with it.
- This is like of_find_device_by_node but for SPMI devices.
- Signed-off-by: Caleb Connolly <[email protected]>
- Acked-by: Stephen Boyd <[email protected]>
- Link: https://lore.kernel.org/r/[email protected]
- Signed-off-by: Jonathan Cameron <[email protected]>
- ---
- drivers/spmi/spmi.c | 17 +++++++++++++++++
- include/linux/spmi.h | 3 +++
- 2 files changed, 20 insertions(+)
- --- a/drivers/spmi/spmi.c
- +++ b/drivers/spmi/spmi.c
- @@ -388,6 +388,23 @@ static struct bus_type spmi_bus_type = {
- };
-
- /**
- + * spmi_device_from_of() - get the associated SPMI device from a device node
- + *
- + * @np: device node
- + *
- + * Returns the struct spmi_device associated with a device node or NULL.
- + */
- +struct spmi_device *spmi_device_from_of(struct device_node *np)
- +{
- + struct device *dev = bus_find_device_by_of_node(&spmi_bus_type, np);
- +
- + if (dev)
- + return to_spmi_device(dev);
- + return NULL;
- +}
- +EXPORT_SYMBOL_GPL(spmi_device_from_of);
- +
- +/**
- * spmi_controller_alloc() - Allocate a new SPMI device
- * @ctrl: associated controller
- *
- --- a/include/linux/spmi.h
- +++ b/include/linux/spmi.h
- @@ -164,6 +164,9 @@ static inline void spmi_driver_unregiste
- module_driver(__spmi_driver, spmi_driver_register, \
- spmi_driver_unregister)
-
- +struct device_node;
- +
- +struct spmi_device *spmi_device_from_of(struct device_node *np);
- int spmi_register_read(struct spmi_device *sdev, u8 addr, u8 *buf);
- int spmi_ext_register_read(struct spmi_device *sdev, u8 addr, u8 *buf,
- size_t len);
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