| Message ID | 20230404115336.599430-2-danishanwar@ti.com |
|---|---|
| State | New |
| Headers | show |
| Series | Introduce PRU platform consumer API | expand |
On Tue, Apr 04, 2023 at 05:23:33PM +0530, MD Danish Anwar wrote: > From: Tero Kristo <t-kristo@ti.com> > > Add two new get and put API, pruss_get() and pruss_put() to the > PRUSS platform driver to allow client drivers to request a handle > to a PRUSS device. This handle will be used by client drivers to > request various operations of the PRUSS platform driver through > additional API that will be added in the following patches. > > The pruss_get() function returns the pruss handle corresponding > to a PRUSS device referenced by a PRU remoteproc instance. The > pruss_put() is the complimentary function to pruss_get(). > > Co-developed-by: Suman Anna <s-anna@ti.com> > Signed-off-by: Suman Anna <s-anna@ti.com> > Signed-off-by: Tero Kristo <t-kristo@ti.com> > Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org> > Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org> > Signed-off-by: Puranjay Mohan <p-mohan@ti.com> > Reviewed-by: Roger Quadros <rogerq@kernel.org> > Reviewed-by: Tony Lindgren <tony@atomide.com> > Signed-off-by: MD Danish Anwar <danishanwar@ti.com> > --- > drivers/remoteproc/pru_rproc.c | 2 +- > drivers/soc/ti/pruss.c | 64 ++++++++++++++++++- > .../{pruss_driver.h => pruss_internal.h} | 7 +- > include/linux/remoteproc/pruss.h | 19 ++++++ > 4 files changed, 87 insertions(+), 5 deletions(-) > rename include/linux/{pruss_driver.h => pruss_internal.h} (90%) > Throughout this patchset an API to access resources required by the PRUSS is added to pruss.c but all the function declarations are added to remoteproc/pruss.h. Is this something you were asked to do or is this how the original implementation was? Other than pruss_get() nothing in there is related to the remoteproc subsystem, the bulk of the work is all about PRUSS. In my opinion all the function declaration should go in pruss_driver.h, which should stay as it is and not made internal. The code looks good now but it needs to be added where it belongs. Thanks, Mathieu > diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c > index b76db7fa693d..4ddd5854d56e 100644 > --- a/drivers/remoteproc/pru_rproc.c > +++ b/drivers/remoteproc/pru_rproc.c > @@ -19,7 +19,7 @@ > #include <linux/of_device.h> > #include <linux/of_irq.h> > #include <linux/remoteproc/pruss.h> > -#include <linux/pruss_driver.h> > +#include <linux/pruss_internal.h> > #include <linux/remoteproc.h> > > #include "remoteproc_internal.h" > diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c > index 6882c86b3ce5..28b77d715903 100644 > --- a/drivers/soc/ti/pruss.c > +++ b/drivers/soc/ti/pruss.c > @@ -6,6 +6,7 @@ > * Author(s): > * Suman Anna <s-anna@ti.com> > * Andrew F. Davis <afd@ti.com> > + * Tero Kristo <t-kristo@ti.com> > */ > > #include <linux/clk-provider.h> > @@ -16,8 +17,9 @@ > #include <linux/of_address.h> > #include <linux/of_device.h> > #include <linux/pm_runtime.h> > -#include <linux/pruss_driver.h> > +#include <linux/pruss_internal.h> > #include <linux/regmap.h> > +#include <linux/remoteproc.h> > #include <linux/slab.h> > > /** > @@ -30,6 +32,66 @@ struct pruss_private_data { > bool has_core_mux_clock; > }; > > +/** > + * pruss_get() - get the pruss for a given PRU remoteproc > + * @rproc: remoteproc handle of a PRU instance > + * > + * Finds the parent pruss device for a PRU given the @rproc handle of the > + * PRU remote processor. This function increments the pruss device's refcount, > + * so always use pruss_put() to decrement it back once pruss isn't needed > + * anymore. > + * > + * This API doesn't check if @rproc is valid or not. It is expected the caller > + * will have done a pru_rproc_get() on @rproc, before calling this API to make > + * sure that @rproc is valid. > + * > + * Return: pruss handle on success, and an ERR_PTR on failure using one > + * of the following error values > + * -EINVAL if invalid parameter > + * -ENODEV if PRU device or PRUSS device is not found > + */ > +struct pruss *pruss_get(struct rproc *rproc) > +{ > + struct pruss *pruss; > + struct device *dev; > + struct platform_device *ppdev; > + > + if (IS_ERR_OR_NULL(rproc)) > + return ERR_PTR(-EINVAL); > + > + dev = &rproc->dev; > + > + /* make sure it is PRU rproc */ > + if (!dev->parent || !is_pru_rproc(dev->parent)) > + return ERR_PTR(-ENODEV); > + > + ppdev = to_platform_device(dev->parent->parent); > + pruss = platform_get_drvdata(ppdev); > + if (!pruss) > + return ERR_PTR(-ENODEV); > + > + get_device(pruss->dev); > + > + return pruss; > +} > +EXPORT_SYMBOL_GPL(pruss_get); > + > +/** > + * pruss_put() - decrement pruss device's usecount > + * @pruss: pruss handle > + * > + * Complimentary function for pruss_get(). Needs to be called > + * after the PRUSS is used, and only if the pruss_get() succeeds. > + */ > +void pruss_put(struct pruss *pruss) > +{ > + if (IS_ERR_OR_NULL(pruss)) > + return; > + > + put_device(pruss->dev); > +} > +EXPORT_SYMBOL_GPL(pruss_put); > + > static void pruss_of_free_clk_provider(void *data) > { > struct device_node *clk_mux_np = data; > diff --git a/include/linux/pruss_driver.h b/include/linux/pruss_internal.h > similarity index 90% > rename from include/linux/pruss_driver.h > rename to include/linux/pruss_internal.h > index ecfded30ed05..8f91cb164054 100644 > --- a/include/linux/pruss_driver.h > +++ b/include/linux/pruss_internal.h > @@ -6,9 +6,10 @@ > * Suman Anna <s-anna@ti.com> > */ > > -#ifndef _PRUSS_DRIVER_H_ > -#define _PRUSS_DRIVER_H_ > +#ifndef _PRUSS_INTERNAL_H_ > +#define _PRUSS_INTERNAL_H_ > > +#include <linux/remoteproc/pruss.h> > #include <linux/types.h> > > /* > @@ -51,4 +52,4 @@ struct pruss { > struct clk *iep_clk_mux; > }; > > -#endif /* _PRUSS_DRIVER_H_ */ > +#endif /* _PRUSS_INTERNAL_H_ */ > diff --git a/include/linux/remoteproc/pruss.h b/include/linux/remoteproc/pruss.h > index 039b50d58df2..93a98cac7829 100644 > --- a/include/linux/remoteproc/pruss.h > +++ b/include/linux/remoteproc/pruss.h > @@ -4,12 +4,14 @@ > * > * Copyright (C) 2015-2022 Texas Instruments Incorporated - http://www.ti.com > * Suman Anna <s-anna@ti.com> > + * Tero Kristo <t-kristo@ti.com> > */ > > #ifndef __LINUX_PRUSS_H > #define __LINUX_PRUSS_H > > #include <linux/device.h> > +#include <linux/err.h> > #include <linux/types.h> > > #define PRU_RPROC_DRVNAME "pru-rproc" > @@ -44,6 +46,23 @@ enum pru_ctable_idx { > > struct device_node; > struct rproc; > +struct pruss; > + > +#if IS_ENABLED(CONFIG_TI_PRUSS) > + > +struct pruss *pruss_get(struct rproc *rproc); > +void pruss_put(struct pruss *pruss); > + > +#else > + > +static inline struct pruss *pruss_get(struct rproc *rproc) > +{ > + return ERR_PTR(-EOPNOTSUPP); > +} > + > +static inline void pruss_put(struct pruss *pruss) { } > + > +#endif /* CONFIG_TI_PRUSS */ > > #if IS_ENABLED(CONFIG_PRU_REMOTEPROC) > > -- > 2.25.1 >
Hi Mathieu On 10/04/23 22:39, Mathieu Poirier wrote: > On Tue, Apr 04, 2023 at 05:23:33PM +0530, MD Danish Anwar wrote: >> From: Tero Kristo <t-kristo@ti.com> >> >> Add two new get and put API, pruss_get() and pruss_put() to the >> PRUSS platform driver to allow client drivers to request a handle >> to a PRUSS device. This handle will be used by client drivers to >> request various operations of the PRUSS platform driver through >> additional API that will be added in the following patches. >> >> The pruss_get() function returns the pruss handle corresponding >> to a PRUSS device referenced by a PRU remoteproc instance. The >> pruss_put() is the complimentary function to pruss_get(). >> >> Co-developed-by: Suman Anna <s-anna@ti.com> >> Signed-off-by: Suman Anna <s-anna@ti.com> >> Signed-off-by: Tero Kristo <t-kristo@ti.com> >> Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org> >> Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org> >> Signed-off-by: Puranjay Mohan <p-mohan@ti.com> >> Reviewed-by: Roger Quadros <rogerq@kernel.org> >> Reviewed-by: Tony Lindgren <tony@atomide.com> >> Signed-off-by: MD Danish Anwar <danishanwar@ti.com> >> --- >> drivers/remoteproc/pru_rproc.c | 2 +- >> drivers/soc/ti/pruss.c | 64 ++++++++++++++++++- >> .../{pruss_driver.h => pruss_internal.h} | 7 +- >> include/linux/remoteproc/pruss.h | 19 ++++++ >> 4 files changed, 87 insertions(+), 5 deletions(-) >> rename include/linux/{pruss_driver.h => pruss_internal.h} (90%) >> > > Throughout this patchset an API to access resources required by the PRUSS > is added to pruss.c but all the function declarations are added to > remoteproc/pruss.h. Is this something you were asked to do or is this how the > original implementation was? > Previously in v3 [1] remoteproc/pruss.h had pruss_get() / pruss_put(), pruss_request_mem_region() / pruss_release_mem_region() and pruss_cfg_read() / update() API declaration in it. These APIs were defined in pruss.c. The APIs were defined in pruss.c. The other APIs [pruss_cfg_get_gpmux()/set(), pruss_cfg_gpimode, pruss_cfg_miirt_enable, pruss_cfg_xfr_enable] were declared as well as defined in linux/pruss_driver.h. But in order to make pruss_cfg_read() / update() API internal to PRUSS as asked by Roger, the other APIs' [pruss_cfg_get_gpmux()/set(), pruss_cfg_gpimode, pruss_cfg_miirt_enable, pruss_cfg_xfr_enable] declaration was moved to pruss.c and definition was moved to remoteproc/pruss.h and pruss_cfg_read() / update() API's declaration as well as definition was moved to drivers/soc/ti/pruss.h So now remoteproc/pruss.h has declaration of below APIs. pruss_get pruss_put pruss_request_mem_region pruss_release_mem_region pruss_cfg_get_gpmux pruss_cfg_set_gpmux pruss_cfg_gpimode pruss_cfg_miirt_enable pruss_cfg_xfr_enable All these APIs are defined in drivers/soc/ti/pruss.c > Other than pruss_get() nothing in there is related to the remoteproc > subsystem, the bulk of the work is all about PRUSS. > > In my opinion all the function declaration should go in pruss_driver.h, which > should stay as it is and not made internal. The code looks good now but it > needs to be added where it belongs. >> Thanks, > Mathieu > There was discussion on moving these declaration to pruss_driver.h but Andrew and Roger agreed on keeping these in remoteproc/pruss.h only in v4 [2]. Also Andrew suggested in v4 to rename pruss_driver.h to internal. Please let me know if I should keep them as it is or try to move APIs from remoteproc/pruss.h to pruss_driver.h. Earlier in v3 below APIs were there in remoteproc/pruss.h pruss_get pruss_put pruss_request_mem_region pruss_release_mem_region Should I keep all these in remoteproc/pruss.h or only pruss_get/put() as mentioned by you in this email. [1] https://lore.kernel.org/all/20230306110934.2736465-1-danishanwar@ti.com/ [2] https://lore.kernel.org/all/67dd1d04-147d-0e40-c06b-6e1e0dd05f13@kernel.org/
On Tue, Apr 04, 2023 at 05:23:33PM +0530, MD Danish Anwar wrote: > From: Tero Kristo <t-kristo@ti.com> > > Add two new get and put API, pruss_get() and pruss_put() to the > PRUSS platform driver to allow client drivers to request a handle > to a PRUSS device. This handle will be used by client drivers to > request various operations of the PRUSS platform driver through > additional API that will be added in the following patches. > > The pruss_get() function returns the pruss handle corresponding > to a PRUSS device referenced by a PRU remoteproc instance. The > pruss_put() is the complimentary function to pruss_get(). > > Co-developed-by: Suman Anna <s-anna@ti.com> > Signed-off-by: Suman Anna <s-anna@ti.com> > Signed-off-by: Tero Kristo <t-kristo@ti.com> > Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org> > Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org> > Signed-off-by: Puranjay Mohan <p-mohan@ti.com> > Reviewed-by: Roger Quadros <rogerq@kernel.org> > Reviewed-by: Tony Lindgren <tony@atomide.com> > Signed-off-by: MD Danish Anwar <danishanwar@ti.com> > --- > drivers/remoteproc/pru_rproc.c | 2 +- > drivers/soc/ti/pruss.c | 64 ++++++++++++++++++- > .../{pruss_driver.h => pruss_internal.h} | 7 +- > include/linux/remoteproc/pruss.h | 19 ++++++ > 4 files changed, 87 insertions(+), 5 deletions(-) > rename include/linux/{pruss_driver.h => pruss_internal.h} (90%) > > diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c > index b76db7fa693d..4ddd5854d56e 100644 > --- a/drivers/remoteproc/pru_rproc.c > +++ b/drivers/remoteproc/pru_rproc.c > @@ -19,7 +19,7 @@ > #include <linux/of_device.h> > #include <linux/of_irq.h> > #include <linux/remoteproc/pruss.h> > -#include <linux/pruss_driver.h> > +#include <linux/pruss_internal.h> Don't rename pruss_driver.h. There is no point in having a file in the include directory that contains a single struct declaration. > #include <linux/remoteproc.h> > > #include "remoteproc_internal.h" > diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c > index 6882c86b3ce5..28b77d715903 100644 > --- a/drivers/soc/ti/pruss.c > +++ b/drivers/soc/ti/pruss.c > @@ -6,6 +6,7 @@ > * Author(s): > * Suman Anna <s-anna@ti.com> > * Andrew F. Davis <afd@ti.com> > + * Tero Kristo <t-kristo@ti.com> > */ > > #include <linux/clk-provider.h> > @@ -16,8 +17,9 @@ > #include <linux/of_address.h> > #include <linux/of_device.h> > #include <linux/pm_runtime.h> > -#include <linux/pruss_driver.h> > +#include <linux/pruss_internal.h> > #include <linux/regmap.h> > +#include <linux/remoteproc.h> > #include <linux/slab.h> > > /** > @@ -30,6 +32,66 @@ struct pruss_private_data { > bool has_core_mux_clock; > }; > > +/** > + * pruss_get() - get the pruss for a given PRU remoteproc > + * @rproc: remoteproc handle of a PRU instance > + * > + * Finds the parent pruss device for a PRU given the @rproc handle of the > + * PRU remote processor. This function increments the pruss device's refcount, > + * so always use pruss_put() to decrement it back once pruss isn't needed > + * anymore. > + * > + * This API doesn't check if @rproc is valid or not. It is expected the caller > + * will have done a pru_rproc_get() on @rproc, before calling this API to make > + * sure that @rproc is valid. > + * > + * Return: pruss handle on success, and an ERR_PTR on failure using one > + * of the following error values > + * -EINVAL if invalid parameter > + * -ENODEV if PRU device or PRUSS device is not found > + */ > +struct pruss *pruss_get(struct rproc *rproc) > +{ > + struct pruss *pruss; > + struct device *dev; > + struct platform_device *ppdev; > + > + if (IS_ERR_OR_NULL(rproc)) > + return ERR_PTR(-EINVAL); > + > + dev = &rproc->dev; > + > + /* make sure it is PRU rproc */ > + if (!dev->parent || !is_pru_rproc(dev->parent)) > + return ERR_PTR(-ENODEV); > + > + ppdev = to_platform_device(dev->parent->parent); > + pruss = platform_get_drvdata(ppdev); > + if (!pruss) > + return ERR_PTR(-ENODEV); > + > + get_device(pruss->dev); > + > + return pruss; > +} > +EXPORT_SYMBOL_GPL(pruss_get); > + > +/** > + * pruss_put() - decrement pruss device's usecount > + * @pruss: pruss handle > + * > + * Complimentary function for pruss_get(). Needs to be called > + * after the PRUSS is used, and only if the pruss_get() succeeds. > + */ > +void pruss_put(struct pruss *pruss) > +{ > + if (IS_ERR_OR_NULL(pruss)) > + return; > + > + put_device(pruss->dev); > +} > +EXPORT_SYMBOL_GPL(pruss_put); pruss_get() and pruss_put() stay here. > + > static void pruss_of_free_clk_provider(void *data) > { > struct device_node *clk_mux_np = data; > diff --git a/include/linux/pruss_driver.h b/include/linux/pruss_internal.h > similarity index 90% > rename from include/linux/pruss_driver.h > rename to include/linux/pruss_internal.h > index ecfded30ed05..8f91cb164054 100644 > --- a/include/linux/pruss_driver.h > +++ b/include/linux/pruss_internal.h > @@ -6,9 +6,10 @@ > * Suman Anna <s-anna@ti.com> > */ > > -#ifndef _PRUSS_DRIVER_H_ > -#define _PRUSS_DRIVER_H_ > +#ifndef _PRUSS_INTERNAL_H_ > +#define _PRUSS_INTERNAL_H_ > > +#include <linux/remoteproc/pruss.h> > #include <linux/types.h> > > /* > @@ -51,4 +52,4 @@ struct pruss { > struct clk *iep_clk_mux; > }; > > -#endif /* _PRUSS_DRIVER_H_ */ > +#endif /* _PRUSS_INTERNAL_H_ */ > diff --git a/include/linux/remoteproc/pruss.h b/include/linux/remoteproc/pruss.h > index 039b50d58df2..93a98cac7829 100644 > --- a/include/linux/remoteproc/pruss.h > +++ b/include/linux/remoteproc/pruss.h > @@ -4,12 +4,14 @@ > * > * Copyright (C) 2015-2022 Texas Instruments Incorporated - http://www.ti.com > * Suman Anna <s-anna@ti.com> > + * Tero Kristo <t-kristo@ti.com> > */ > > #ifndef __LINUX_PRUSS_H > #define __LINUX_PRUSS_H > > #include <linux/device.h> > +#include <linux/err.h> > #include <linux/types.h> > > #define PRU_RPROC_DRVNAME "pru-rproc" > @@ -44,6 +46,23 @@ enum pru_ctable_idx { > > struct device_node; > struct rproc; > +struct pruss; > + > +#if IS_ENABLED(CONFIG_TI_PRUSS) > + > +struct pruss *pruss_get(struct rproc *rproc); > +void pruss_put(struct pruss *pruss); > + > +#else > + > +static inline struct pruss *pruss_get(struct rproc *rproc) > +{ > + return ERR_PTR(-EOPNOTSUPP); > +} > + > +static inline void pruss_put(struct pruss *pruss) { } > + > +#endif /* CONFIG_TI_PRUSS */ These go in pruss_driver.h > > #if IS_ENABLED(CONFIG_PRU_REMOTEPROC) > > -- > 2.25.1 >
diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c index b76db7fa693d..4ddd5854d56e 100644 --- a/drivers/remoteproc/pru_rproc.c +++ b/drivers/remoteproc/pru_rproc.c @@ -19,7 +19,7 @@ #include <linux/of_device.h> #include <linux/of_irq.h> #include <linux/remoteproc/pruss.h> -#include <linux/pruss_driver.h> +#include <linux/pruss_internal.h> #include <linux/remoteproc.h> #include "remoteproc_internal.h" diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c index 6882c86b3ce5..28b77d715903 100644 --- a/drivers/soc/ti/pruss.c +++ b/drivers/soc/ti/pruss.c @@ -6,6 +6,7 @@ * Author(s): * Suman Anna <s-anna@ti.com> * Andrew F. Davis <afd@ti.com> + * Tero Kristo <t-kristo@ti.com> */ #include <linux/clk-provider.h> @@ -16,8 +17,9 @@ #include <linux/of_address.h> #include <linux/of_device.h> #include <linux/pm_runtime.h> -#include <linux/pruss_driver.h> +#include <linux/pruss_internal.h> #include <linux/regmap.h> +#include <linux/remoteproc.h> #include <linux/slab.h> /** @@ -30,6 +32,66 @@ struct pruss_private_data { bool has_core_mux_clock; }; +/** + * pruss_get() - get the pruss for a given PRU remoteproc + * @rproc: remoteproc handle of a PRU instance + * + * Finds the parent pruss device for a PRU given the @rproc handle of the + * PRU remote processor. This function increments the pruss device's refcount, + * so always use pruss_put() to decrement it back once pruss isn't needed + * anymore. + * + * This API doesn't check if @rproc is valid or not. It is expected the caller + * will have done a pru_rproc_get() on @rproc, before calling this API to make + * sure that @rproc is valid. + * + * Return: pruss handle on success, and an ERR_PTR on failure using one + * of the following error values + * -EINVAL if invalid parameter + * -ENODEV if PRU device or PRUSS device is not found + */ +struct pruss *pruss_get(struct rproc *rproc) +{ + struct pruss *pruss; + struct device *dev; + struct platform_device *ppdev; + + if (IS_ERR_OR_NULL(rproc)) + return ERR_PTR(-EINVAL); + + dev = &rproc->dev; + + /* make sure it is PRU rproc */ + if (!dev->parent || !is_pru_rproc(dev->parent)) + return ERR_PTR(-ENODEV); + + ppdev = to_platform_device(dev->parent->parent); + pruss = platform_get_drvdata(ppdev); + if (!pruss) + return ERR_PTR(-ENODEV); + + get_device(pruss->dev); + + return pruss; +} +EXPORT_SYMBOL_GPL(pruss_get); + +/** + * pruss_put() - decrement pruss device's usecount + * @pruss: pruss handle + * + * Complimentary function for pruss_get(). Needs to be called + * after the PRUSS is used, and only if the pruss_get() succeeds. + */ +void pruss_put(struct pruss *pruss) +{ + if (IS_ERR_OR_NULL(pruss)) + return; + + put_device(pruss->dev); +} +EXPORT_SYMBOL_GPL(pruss_put); + static void pruss_of_free_clk_provider(void *data) { struct device_node *clk_mux_np = data; diff --git a/include/linux/pruss_driver.h b/include/linux/pruss_internal.h similarity index 90% rename from include/linux/pruss_driver.h rename to include/linux/pruss_internal.h index ecfded30ed05..8f91cb164054 100644 --- a/include/linux/pruss_driver.h +++ b/include/linux/pruss_internal.h @@ -6,9 +6,10 @@ * Suman Anna <s-anna@ti.com> */ -#ifndef _PRUSS_DRIVER_H_ -#define _PRUSS_DRIVER_H_ +#ifndef _PRUSS_INTERNAL_H_ +#define _PRUSS_INTERNAL_H_ +#include <linux/remoteproc/pruss.h> #include <linux/types.h> /* @@ -51,4 +52,4 @@ struct pruss { struct clk *iep_clk_mux; }; -#endif /* _PRUSS_DRIVER_H_ */ +#endif /* _PRUSS_INTERNAL_H_ */ diff --git a/include/linux/remoteproc/pruss.h b/include/linux/remoteproc/pruss.h index 039b50d58df2..93a98cac7829 100644 --- a/include/linux/remoteproc/pruss.h +++ b/include/linux/remoteproc/pruss.h @@ -4,12 +4,14 @@ * * Copyright (C) 2015-2022 Texas Instruments Incorporated - http://www.ti.com * Suman Anna <s-anna@ti.com> + * Tero Kristo <t-kristo@ti.com> */ #ifndef __LINUX_PRUSS_H #define __LINUX_PRUSS_H #include <linux/device.h> +#include <linux/err.h> #include <linux/types.h> #define PRU_RPROC_DRVNAME "pru-rproc" @@ -44,6 +46,23 @@ enum pru_ctable_idx { struct device_node; struct rproc; +struct pruss; + +#if IS_ENABLED(CONFIG_TI_PRUSS) + +struct pruss *pruss_get(struct rproc *rproc); +void pruss_put(struct pruss *pruss); + +#else + +static inline struct pruss *pruss_get(struct rproc *rproc) +{ + return ERR_PTR(-EOPNOTSUPP); +} + +static inline void pruss_put(struct pruss *pruss) { } + +#endif /* CONFIG_TI_PRUSS */ #if IS_ENABLED(CONFIG_PRU_REMOTEPROC)