diff mbox series

[v14,01/10] spmi: add a helper to look up an SPMI device from a device node

Message ID 20220429220904.137297-2-caleb.connolly@linaro.org (mailing list archive)
State Accepted
Headers show
Series iio: adc: introduce Qualcomm SPMI Round Robin ADC | expand

Commit Message

Caleb Connolly April 29, 2022, 10:08 p.m. UTC
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>
---
 drivers/spmi/spmi.c  | 17 +++++++++++++++++
 include/linux/spmi.h |  3 +++
 2 files changed, 20 insertions(+)

Comments

Jonathan Cameron May 1, 2022, 5:23 p.m. UTC | #1
On Fri, 29 Apr 2022 23:08:56 +0100
Caleb Connolly <caleb.connolly@linaro.org> wrote:

> 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> 

Stephen, are you fine with this addition to spmi?

Given bulk of this series in in IIO I'm planning to pick up once
everyone is happy with it.

Thanks,

Jonathan


> ---
>  drivers/spmi/spmi.c  | 17 +++++++++++++++++
>  include/linux/spmi.h |  3 +++
>  2 files changed, 20 insertions(+)
> 
> 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
> @@ -386,6 +386,23 @@ static struct bus_type spmi_bus_type = {
>  	.uevent		= spmi_drv_uevent,
>  };
>  
> +/**
> + * 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);
Jonathan Cameron June 4, 2022, 4:29 p.m. UTC | #2
On Sun, 1 May 2022 18:23:23 +0100
Jonathan Cameron <jic23@kernel.org> wrote:

> On Fri, 29 Apr 2022 23:08:56 +0100
> Caleb Connolly <caleb.connolly@linaro.org> wrote:
> 
> > 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>   
> 
> Stephen, are you fine with this addition to spmi?

Stephen.  This is still waiting for an SPMI ack.

Thanks,

Jonathan

> 
> Given bulk of this series in in IIO I'm planning to pick up once
> everyone is happy with it.
> 
> Thanks,
> 
> Jonathan
> 
> 
> > ---
> >  drivers/spmi/spmi.c  | 17 +++++++++++++++++
> >  include/linux/spmi.h |  3 +++
> >  2 files changed, 20 insertions(+)
> > 
> > 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
> > @@ -386,6 +386,23 @@ static struct bus_type spmi_bus_type = {
> >  	.uevent		= spmi_drv_uevent,
> >  };
> >  
> > +/**
> > + * 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);  
>
Stephen Boyd June 14, 2022, 8:40 a.m. UTC | #3
Quoting Caleb Connolly (2022-04-29 15:08:56)
> 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>
diff mbox series

Patch

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
@@ -386,6 +386,23 @@  static struct bus_type spmi_bus_type = {
 	.uevent		= spmi_drv_uevent,
 };
 
+/**
+ * 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);