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| author |   Caleb Connolly <caleb.connolly@linaro.org> | 2022-04-29 23:08:56 +0100 |
|---|---|---|
| committer |   Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-06-18 13:48:19 +0100 |
| commit | 9a2139c2912ea64e288749c21452930dc752d4fd (patch) | |
| tree | 909b1e94cac85cdb1a7860d1cf080d04a44ba610 | |
| parent | Linux 5.19-rc1 (diff) | |
| download | linux-dev-9a2139c2912ea64e288749c21452930dc752d4fd.tar.xz linux-dev-9a2139c2912ea64e288749c21452930dc752d4fd.zip | |
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 <caleb.connolly@linaro.org>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20220429220904.137297-2-caleb.connolly@linaro.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
| -rw-r--r-- | drivers/spmi/spmi.c | 17 | ||||
| -rw-r--r-- | include/linux/spmi.h | 3 |
2 files changed, 20 insertions, 0 deletions
diff --git a/drivers/spmi/spmi.c b/drivers/spmi/spmi.c index b37ead9e2fad..a456ce5141e1 100644 --- a/drivers/spmi/spmi.c +++ b/drivers/spmi/spmi.c @@ -387,6 +387,23 @@ 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 * diff --git a/include/linux/spmi.h b/include/linux/spmi.h index 729bcbf9f5ad..eac1956a8727 100644 --- a/include/linux/spmi.h +++ b/include/linux/spmi.h @@ -164,6 +164,9 @@ static inline void spmi_driver_unregister(struct spmi_driver *sdrv) 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); |