| Message ID | 20230323062451.2925996-6-danishanwar@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Introduce PRU platform consumer API | expand |
On Thu, Mar 23, 2023 at 11:54:51AM +0530, MD Danish Anwar wrote: > From: Tero Kristo <t-kristo@ti.com> > > Add two new helper functions pruss_cfg_get_gpmux() & pruss_cfg_set_gpmux() > to get and set the GP MUX mode for programming the PRUSS internal wrapper > mux functionality as needed by usecases. > > 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> > Signed-off-by: MD Danish Anwar <danishanwar@ti.com> > Reviewed-by: Roger Quadros <rogerq@kernel.org> > --- > drivers/soc/ti/pruss.c | 44 ++++++++++++++++++++++++++++++++ > include/linux/remoteproc/pruss.h | 30 ++++++++++++++++++++++ > 2 files changed, 74 insertions(+) > > diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c > index ac415442e85b..3aa3c38c6c79 100644 > --- a/drivers/soc/ti/pruss.c > +++ b/drivers/soc/ti/pruss.c > @@ -239,6 +239,50 @@ int pruss_cfg_xfr_enable(struct pruss *pruss, enum pru_type pru_type, > } > EXPORT_SYMBOL_GPL(pruss_cfg_xfr_enable); > > +/** > + * pruss_cfg_get_gpmux() - get the current GPMUX value for a PRU device > + * @pruss: pruss instance > + * @pru_id: PRU identifier (0-1) > + * @mux: pointer to store the current mux value into > + * > + * Return: 0 on success, or an error code otherwise > + */ > +int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux) > +{ > + int ret = 0; > + u32 val; > + > + if (pru_id < 0 || pru_id >= PRUSS_NUM_PRUS) > + return -EINVAL; > + > + ret = pruss_cfg_read(pruss, PRUSS_CFG_GPCFG(pru_id), &val); > + if (!ret) > + *mux = (u8)((val & PRUSS_GPCFG_PRU_MUX_SEL_MASK) >> > + PRUSS_GPCFG_PRU_MUX_SEL_SHIFT); What happens if @mux is NULL? Thanks, Mathieu > + return ret; > +} > +EXPORT_SYMBOL_GPL(pruss_cfg_get_gpmux); > + > +/** > + * pruss_cfg_set_gpmux() - set the GPMUX value for a PRU device > + * @pruss: pruss instance > + * @pru_id: PRU identifier (0-1) > + * @mux: new mux value for PRU > + * > + * Return: 0 on success, or an error code otherwise > + */ > +int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux) > +{ > + if (mux >= PRUSS_GP_MUX_SEL_MAX || > + pru_id < 0 || pru_id >= PRUSS_NUM_PRUS) > + return -EINVAL; > + > + return pruss_cfg_update(pruss, PRUSS_CFG_GPCFG(pru_id), > + PRUSS_GPCFG_PRU_MUX_SEL_MASK, > + (u32)mux << PRUSS_GPCFG_PRU_MUX_SEL_SHIFT); > +} > +EXPORT_SYMBOL_GPL(pruss_cfg_set_gpmux); > + > static void pruss_of_free_clk_provider(void *data) > { > struct device_node *clk_mux_np = data; > diff --git a/include/linux/remoteproc/pruss.h b/include/linux/remoteproc/pruss.h > index bb001f712980..42f1586c62ac 100644 > --- a/include/linux/remoteproc/pruss.h > +++ b/include/linux/remoteproc/pruss.h > @@ -16,6 +16,24 @@ > > #define PRU_RPROC_DRVNAME "pru-rproc" > > +/* > + * enum pruss_gp_mux_sel - PRUSS GPI/O Mux modes for the > + * PRUSS_GPCFG0/1 registers > + * > + * NOTE: The below defines are the most common values, but there > + * are some exceptions like on 66AK2G, where the RESERVED and MII2 > + * values are interchanged. Also, this bit-field does not exist on > + * AM335x SoCs > + */ > +enum pruss_gp_mux_sel { > + PRUSS_GP_MUX_SEL_GP = 0, > + PRUSS_GP_MUX_SEL_ENDAT, > + PRUSS_GP_MUX_SEL_RESERVED, > + PRUSS_GP_MUX_SEL_SD, > + PRUSS_GP_MUX_SEL_MII2, > + PRUSS_GP_MUX_SEL_MAX, > +}; > + > /* > * enum pruss_gpi_mode - PRUSS GPI configuration modes, used > * to program the PRUSS_GPCFG0/1 registers > @@ -110,6 +128,8 @@ int pruss_cfg_gpimode(struct pruss *pruss, enum pruss_pru_id pru_id, > int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable); > int pruss_cfg_xfr_enable(struct pruss *pruss, enum pru_type pru_type, > bool enable); > +int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux); > +int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux); > > #else > > @@ -152,6 +172,16 @@ static inline int pruss_cfg_xfr_enable(struct pruss *pruss, > return ERR_PTR(-EOPNOTSUPP); > } > > +static inline int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux) > +{ > + return ERR_PTR(-EOPNOTSUPP); > +} > + > +static inline int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux) > +{ > + return ERR_PTR(-EOPNOTSUPP); > +} > + > #endif /* CONFIG_TI_PRUSS */ > > #if IS_ENABLED(CONFIG_PRU_REMOTEPROC) > -- > 2.25.1 >
On 28/03/23 02:34, Mathieu Poirier wrote: > On Thu, Mar 23, 2023 at 11:54:51AM +0530, MD Danish Anwar wrote: >> From: Tero Kristo <t-kristo@ti.com> >> >> Add two new helper functions pruss_cfg_get_gpmux() & pruss_cfg_set_gpmux() >> to get and set the GP MUX mode for programming the PRUSS internal wrapper >> mux functionality as needed by usecases. >> >> 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> >> Signed-off-by: MD Danish Anwar <danishanwar@ti.com> >> Reviewed-by: Roger Quadros <rogerq@kernel.org> >> --- >> drivers/soc/ti/pruss.c | 44 ++++++++++++++++++++++++++++++++ >> include/linux/remoteproc/pruss.h | 30 ++++++++++++++++++++++ >> 2 files changed, 74 insertions(+) >> >> diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c >> index ac415442e85b..3aa3c38c6c79 100644 >> --- a/drivers/soc/ti/pruss.c >> +++ b/drivers/soc/ti/pruss.c >> @@ -239,6 +239,50 @@ int pruss_cfg_xfr_enable(struct pruss *pruss, enum pru_type pru_type, >> } >> EXPORT_SYMBOL_GPL(pruss_cfg_xfr_enable); >> >> +/** >> + * pruss_cfg_get_gpmux() - get the current GPMUX value for a PRU device >> + * @pruss: pruss instance >> + * @pru_id: PRU identifier (0-1) >> + * @mux: pointer to store the current mux value into >> + * >> + * Return: 0 on success, or an error code otherwise >> + */ >> +int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux) >> +{ >> + int ret = 0; >> + u32 val; >> + >> + if (pru_id < 0 || pru_id >= PRUSS_NUM_PRUS) >> + return -EINVAL; >> + >> + ret = pruss_cfg_read(pruss, PRUSS_CFG_GPCFG(pru_id), &val); >> + if (!ret) >> + *mux = (u8)((val & PRUSS_GPCFG_PRU_MUX_SEL_MASK) >> >> + PRUSS_GPCFG_PRU_MUX_SEL_SHIFT); > > What happens if @mux is NULL? @mux being null may result in some error here. I will add NULL check for mux before storing the value in mux. I will modify the above if condition to have NULL check for mux as well. The if condition will look like below. if (pru_id < 0 || pru_id >= PRUSS_NUM_PRUS || !mux) return -EINVAL; Please let me know if this looks OK. > > Thanks, > Mathieu > > >> + return ret; >> +} >> +EXPORT_SYMBOL_GPL(pruss_cfg_get_gpmux); >> + >> +/** >> + * pruss_cfg_set_gpmux() - set the GPMUX value for a PRU device >> + * @pruss: pruss instance >> + * @pru_id: PRU identifier (0-1) >> + * @mux: new mux value for PRU >> + * >> + * Return: 0 on success, or an error code otherwise >> + */ >> +int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux) >> +{ >> + if (mux >= PRUSS_GP_MUX_SEL_MAX || >> + pru_id < 0 || pru_id >= PRUSS_NUM_PRUS) >> + return -EINVAL; >> + >> + return pruss_cfg_update(pruss, PRUSS_CFG_GPCFG(pru_id), >> + PRUSS_GPCFG_PRU_MUX_SEL_MASK, >> + (u32)mux << PRUSS_GPCFG_PRU_MUX_SEL_SHIFT); >> +} >> +EXPORT_SYMBOL_GPL(pruss_cfg_set_gpmux); >> + >> static void pruss_of_free_clk_provider(void *data) >> { >> struct device_node *clk_mux_np = data; >> diff --git a/include/linux/remoteproc/pruss.h b/include/linux/remoteproc/pruss.h >> index bb001f712980..42f1586c62ac 100644 >> --- a/include/linux/remoteproc/pruss.h >> +++ b/include/linux/remoteproc/pruss.h >> @@ -16,6 +16,24 @@ >> >> #define PRU_RPROC_DRVNAME "pru-rproc" >> >> +/* >> + * enum pruss_gp_mux_sel - PRUSS GPI/O Mux modes for the >> + * PRUSS_GPCFG0/1 registers >> + * >> + * NOTE: The below defines are the most common values, but there >> + * are some exceptions like on 66AK2G, where the RESERVED and MII2 >> + * values are interchanged. Also, this bit-field does not exist on >> + * AM335x SoCs >> + */ >> +enum pruss_gp_mux_sel { >> + PRUSS_GP_MUX_SEL_GP = 0, >> + PRUSS_GP_MUX_SEL_ENDAT, >> + PRUSS_GP_MUX_SEL_RESERVED, >> + PRUSS_GP_MUX_SEL_SD, >> + PRUSS_GP_MUX_SEL_MII2, >> + PRUSS_GP_MUX_SEL_MAX, >> +}; >> + >> /* >> * enum pruss_gpi_mode - PRUSS GPI configuration modes, used >> * to program the PRUSS_GPCFG0/1 registers >> @@ -110,6 +128,8 @@ int pruss_cfg_gpimode(struct pruss *pruss, enum pruss_pru_id pru_id, >> int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable); >> int pruss_cfg_xfr_enable(struct pruss *pruss, enum pru_type pru_type, >> bool enable); >> +int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux); >> +int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux); >> >> #else >> >> @@ -152,6 +172,16 @@ static inline int pruss_cfg_xfr_enable(struct pruss *pruss, >> return ERR_PTR(-EOPNOTSUPP); >> } >> >> +static inline int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux) >> +{ >> + return ERR_PTR(-EOPNOTSUPP); >> +} >> + >> +static inline int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux) >> +{ >> + return ERR_PTR(-EOPNOTSUPP); >> +} >> + >> #endif /* CONFIG_TI_PRUSS */ >> >> #if IS_ENABLED(CONFIG_PRU_REMOTEPROC) >> -- >> 2.25.1 >>
On Tue, 28 Mar 2023 at 05:28, Md Danish Anwar <a0501179@ti.com> wrote: > > > > On 28/03/23 02:34, Mathieu Poirier wrote: > > On Thu, Mar 23, 2023 at 11:54:51AM +0530, MD Danish Anwar wrote: > >> From: Tero Kristo <t-kristo@ti.com> > >> > >> Add two new helper functions pruss_cfg_get_gpmux() & pruss_cfg_set_gpmux() > >> to get and set the GP MUX mode for programming the PRUSS internal wrapper > >> mux functionality as needed by usecases. > >> > >> 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> > >> Signed-off-by: MD Danish Anwar <danishanwar@ti.com> > >> Reviewed-by: Roger Quadros <rogerq@kernel.org> > >> --- > >> drivers/soc/ti/pruss.c | 44 ++++++++++++++++++++++++++++++++ > >> include/linux/remoteproc/pruss.h | 30 ++++++++++++++++++++++ > >> 2 files changed, 74 insertions(+) > >> > >> diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c > >> index ac415442e85b..3aa3c38c6c79 100644 > >> --- a/drivers/soc/ti/pruss.c > >> +++ b/drivers/soc/ti/pruss.c > >> @@ -239,6 +239,50 @@ int pruss_cfg_xfr_enable(struct pruss *pruss, enum pru_type pru_type, > >> } > >> EXPORT_SYMBOL_GPL(pruss_cfg_xfr_enable); > >> > >> +/** > >> + * pruss_cfg_get_gpmux() - get the current GPMUX value for a PRU device > >> + * @pruss: pruss instance > >> + * @pru_id: PRU identifier (0-1) > >> + * @mux: pointer to store the current mux value into > >> + * > >> + * Return: 0 on success, or an error code otherwise > >> + */ > >> +int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux) > >> +{ > >> + int ret = 0; > >> + u32 val; > >> + > >> + if (pru_id < 0 || pru_id >= PRUSS_NUM_PRUS) > >> + return -EINVAL; > >> + > >> + ret = pruss_cfg_read(pruss, PRUSS_CFG_GPCFG(pru_id), &val); > >> + if (!ret) > >> + *mux = (u8)((val & PRUSS_GPCFG_PRU_MUX_SEL_MASK) >> > >> + PRUSS_GPCFG_PRU_MUX_SEL_SHIFT); > > > > What happens if @mux is NULL? > > @mux being null may result in some error here. I will add NULL check for mux > before storing the value in mux. > It will result in a kernel panic. > I will modify the above if condition to have NULL check for mux as well. > The if condition will look like below. > > if (pru_id < 0 || pru_id >= PRUSS_NUM_PRUS || !mux) > return -EINVAL; > That will be fine. > Please let me know if this looks OK. > > > > > Thanks, > > Mathieu > > > > > >> + return ret; > >> +} > >> +EXPORT_SYMBOL_GPL(pruss_cfg_get_gpmux); > >> + > >> +/** > >> + * pruss_cfg_set_gpmux() - set the GPMUX value for a PRU device > >> + * @pruss: pruss instance > >> + * @pru_id: PRU identifier (0-1) > >> + * @mux: new mux value for PRU > >> + * > >> + * Return: 0 on success, or an error code otherwise > >> + */ > >> +int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux) > >> +{ > >> + if (mux >= PRUSS_GP_MUX_SEL_MAX || > >> + pru_id < 0 || pru_id >= PRUSS_NUM_PRUS) > >> + return -EINVAL; > >> + > >> + return pruss_cfg_update(pruss, PRUSS_CFG_GPCFG(pru_id), > >> + PRUSS_GPCFG_PRU_MUX_SEL_MASK, > >> + (u32)mux << PRUSS_GPCFG_PRU_MUX_SEL_SHIFT); > >> +} > >> +EXPORT_SYMBOL_GPL(pruss_cfg_set_gpmux); > >> + > >> static void pruss_of_free_clk_provider(void *data) > >> { > >> struct device_node *clk_mux_np = data; > >> diff --git a/include/linux/remoteproc/pruss.h b/include/linux/remoteproc/pruss.h > >> index bb001f712980..42f1586c62ac 100644 > >> --- a/include/linux/remoteproc/pruss.h > >> +++ b/include/linux/remoteproc/pruss.h > >> @@ -16,6 +16,24 @@ > >> > >> #define PRU_RPROC_DRVNAME "pru-rproc" > >> > >> +/* > >> + * enum pruss_gp_mux_sel - PRUSS GPI/O Mux modes for the > >> + * PRUSS_GPCFG0/1 registers > >> + * > >> + * NOTE: The below defines are the most common values, but there > >> + * are some exceptions like on 66AK2G, where the RESERVED and MII2 > >> + * values are interchanged. Also, this bit-field does not exist on > >> + * AM335x SoCs > >> + */ > >> +enum pruss_gp_mux_sel { > >> + PRUSS_GP_MUX_SEL_GP = 0, > >> + PRUSS_GP_MUX_SEL_ENDAT, > >> + PRUSS_GP_MUX_SEL_RESERVED, > >> + PRUSS_GP_MUX_SEL_SD, > >> + PRUSS_GP_MUX_SEL_MII2, > >> + PRUSS_GP_MUX_SEL_MAX, > >> +}; > >> + > >> /* > >> * enum pruss_gpi_mode - PRUSS GPI configuration modes, used > >> * to program the PRUSS_GPCFG0/1 registers > >> @@ -110,6 +128,8 @@ int pruss_cfg_gpimode(struct pruss *pruss, enum pruss_pru_id pru_id, > >> int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable); > >> int pruss_cfg_xfr_enable(struct pruss *pruss, enum pru_type pru_type, > >> bool enable); > >> +int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux); > >> +int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux); > >> > >> #else > >> > >> @@ -152,6 +172,16 @@ static inline int pruss_cfg_xfr_enable(struct pruss *pruss, > >> return ERR_PTR(-EOPNOTSUPP); > >> } > >> > >> +static inline int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux) > >> +{ > >> + return ERR_PTR(-EOPNOTSUPP); > >> +} > >> + > >> +static inline int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux) > >> +{ > >> + return ERR_PTR(-EOPNOTSUPP); > >> +} > >> + > >> #endif /* CONFIG_TI_PRUSS */ > >> > >> #if IS_ENABLED(CONFIG_PRU_REMOTEPROC) > >> -- > >> 2.25.1 > >> > > -- > Thanks and Regards, > Danish.
On 29/03/23 23:34, Mathieu Poirier wrote: > On Tue, 28 Mar 2023 at 05:28, Md Danish Anwar <a0501179@ti.com> wrote: >> >> On 28/03/23 02:34, Mathieu Poirier wrote: >>> On Thu, Mar 23, 2023 at 11:54:51AM +0530, MD Danish Anwar wrote: >>>> From: Tero Kristo <t-kristo@ti.com> >>>> >>>> Add two new helper functions pruss_cfg_get_gpmux() & pruss_cfg_set_gpmux() >>>> to get and set the GP MUX mode for programming the PRUSS internal wrapper >>>> mux functionality as needed by usecases. >>>> >>>> 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> >>>> Signed-off-by: MD Danish Anwar <danishanwar@ti.com> >>>> Reviewed-by: Roger Quadros <rogerq@kernel.org> >>>> --- >>>> drivers/soc/ti/pruss.c | 44 ++++++++++++++++++++++++++++++++ >>>> include/linux/remoteproc/pruss.h | 30 ++++++++++++++++++++++ >>>> 2 files changed, 74 insertions(+) >>>> >>>> diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c >>>> index ac415442e85b..3aa3c38c6c79 100644 >>>> --- a/drivers/soc/ti/pruss.c >>>> +++ b/drivers/soc/ti/pruss.c >>>> @@ -239,6 +239,50 @@ int pruss_cfg_xfr_enable(struct pruss *pruss, enum pru_type pru_type, >>>> } >>>> EXPORT_SYMBOL_GPL(pruss_cfg_xfr_enable); >>>> >>>> +/** >>>> + * pruss_cfg_get_gpmux() - get the current GPMUX value for a PRU device >>>> + * @pruss: pruss instance >>>> + * @pru_id: PRU identifier (0-1) >>>> + * @mux: pointer to store the current mux value into >>>> + * >>>> + * Return: 0 on success, or an error code otherwise >>>> + */ >>>> +int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux) >>>> +{ >>>> + int ret = 0; >>>> + u32 val; >>>> + >>>> + if (pru_id < 0 || pru_id >= PRUSS_NUM_PRUS) >>>> + return -EINVAL; >>>> + >>>> + ret = pruss_cfg_read(pruss, PRUSS_CFG_GPCFG(pru_id), &val); >>>> + if (!ret) >>>> + *mux = (u8)((val & PRUSS_GPCFG_PRU_MUX_SEL_MASK) >> >>>> + PRUSS_GPCFG_PRU_MUX_SEL_SHIFT); >>> >>> What happens if @mux is NULL? >> >> @mux being null may result in some error here. I will add NULL check for mux >> before storing the value in mux. >> > > It will result in a kernel panic. > >> I will modify the above if condition to have NULL check for mux as well. >> The if condition will look like below. >> >> if (pru_id < 0 || pru_id >= PRUSS_NUM_PRUS || !mux) >> return -EINVAL; >> > > That will be fine.> Sure, I'll go ahead and make this change. >> Please let me know if this looks OK. >> >>> >>> Thanks, >>> Mathieu >>> >>> >>>> + return ret; >>>> +} >>>> +EXPORT_SYMBOL_GPL(pruss_cfg_get_gpmux); >>>> + >>>> +/** >>>> + * pruss_cfg_set_gpmux() - set the GPMUX value for a PRU device >>>> + * @pruss: pruss instance >>>> + * @pru_id: PRU identifier (0-1) >>>> + * @mux: new mux value for PRU >>>> + * >>>> + * Return: 0 on success, or an error code otherwise >>>> + */ >>>> +int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux) >>>> +{ >>>> + if (mux >= PRUSS_GP_MUX_SEL_MAX || >>>> + pru_id < 0 || pru_id >= PRUSS_NUM_PRUS) >>>> + return -EINVAL; >>>> + >>>> + return pruss_cfg_update(pruss, PRUSS_CFG_GPCFG(pru_id), >>>> + PRUSS_GPCFG_PRU_MUX_SEL_MASK, >>>> + (u32)mux << PRUSS_GPCFG_PRU_MUX_SEL_SHIFT); >>>> +} >>>> +EXPORT_SYMBOL_GPL(pruss_cfg_set_gpmux); >>>> + >>>> static void pruss_of_free_clk_provider(void *data) >>>> { >>>> struct device_node *clk_mux_np = data; >>>> diff --git a/include/linux/remoteproc/pruss.h b/include/linux/remoteproc/pruss.h >>>> index bb001f712980..42f1586c62ac 100644 >>>> --- a/include/linux/remoteproc/pruss.h >>>> +++ b/include/linux/remoteproc/pruss.h >>>> @@ -16,6 +16,24 @@ >>>> >>>> #define PRU_RPROC_DRVNAME "pru-rproc" >>>> >>>> +/* >>>> + * enum pruss_gp_mux_sel - PRUSS GPI/O Mux modes for the >>>> + * PRUSS_GPCFG0/1 registers >>>> + * >>>> + * NOTE: The below defines are the most common values, but there >>>> + * are some exceptions like on 66AK2G, where the RESERVED and MII2 >>>> + * values are interchanged. Also, this bit-field does not exist on >>>> + * AM335x SoCs >>>> + */ >>>> +enum pruss_gp_mux_sel { >>>> + PRUSS_GP_MUX_SEL_GP = 0, >>>> + PRUSS_GP_MUX_SEL_ENDAT, >>>> + PRUSS_GP_MUX_SEL_RESERVED, >>>> + PRUSS_GP_MUX_SEL_SD, >>>> + PRUSS_GP_MUX_SEL_MII2, >>>> + PRUSS_GP_MUX_SEL_MAX, >>>> +}; >>>> + >>>> /* >>>> * enum pruss_gpi_mode - PRUSS GPI configuration modes, used >>>> * to program the PRUSS_GPCFG0/1 registers >>>> @@ -110,6 +128,8 @@ int pruss_cfg_gpimode(struct pruss *pruss, enum pruss_pru_id pru_id, >>>> int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable); >>>> int pruss_cfg_xfr_enable(struct pruss *pruss, enum pru_type pru_type, >>>> bool enable); >>>> +int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux); >>>> +int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux); >>>> >>>> #else >>>> >>>> @@ -152,6 +172,16 @@ static inline int pruss_cfg_xfr_enable(struct pruss *pruss, >>>> return ERR_PTR(-EOPNOTSUPP); >>>> } >>>> >>>> +static inline int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux) >>>> +{ >>>> + return ERR_PTR(-EOPNOTSUPP); >>>> +} >>>> + >>>> +static inline int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux) >>>> +{ >>>> + return ERR_PTR(-EOPNOTSUPP); >>>> +} >>>> + >>>> #endif /* CONFIG_TI_PRUSS */ >>>> >>>> #if IS_ENABLED(CONFIG_PRU_REMOTEPROC) >>>> -- >>>> 2.25.1 >>>> >> >> -- >> Thanks and Regards, >> Danish.
diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c index ac415442e85b..3aa3c38c6c79 100644 --- a/drivers/soc/ti/pruss.c +++ b/drivers/soc/ti/pruss.c @@ -239,6 +239,50 @@ int pruss_cfg_xfr_enable(struct pruss *pruss, enum pru_type pru_type, } EXPORT_SYMBOL_GPL(pruss_cfg_xfr_enable); +/** + * pruss_cfg_get_gpmux() - get the current GPMUX value for a PRU device + * @pruss: pruss instance + * @pru_id: PRU identifier (0-1) + * @mux: pointer to store the current mux value into + * + * Return: 0 on success, or an error code otherwise + */ +int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux) +{ + int ret = 0; + u32 val; + + if (pru_id < 0 || pru_id >= PRUSS_NUM_PRUS) + return -EINVAL; + + ret = pruss_cfg_read(pruss, PRUSS_CFG_GPCFG(pru_id), &val); + if (!ret) + *mux = (u8)((val & PRUSS_GPCFG_PRU_MUX_SEL_MASK) >> + PRUSS_GPCFG_PRU_MUX_SEL_SHIFT); + return ret; +} +EXPORT_SYMBOL_GPL(pruss_cfg_get_gpmux); + +/** + * pruss_cfg_set_gpmux() - set the GPMUX value for a PRU device + * @pruss: pruss instance + * @pru_id: PRU identifier (0-1) + * @mux: new mux value for PRU + * + * Return: 0 on success, or an error code otherwise + */ +int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux) +{ + if (mux >= PRUSS_GP_MUX_SEL_MAX || + pru_id < 0 || pru_id >= PRUSS_NUM_PRUS) + return -EINVAL; + + return pruss_cfg_update(pruss, PRUSS_CFG_GPCFG(pru_id), + PRUSS_GPCFG_PRU_MUX_SEL_MASK, + (u32)mux << PRUSS_GPCFG_PRU_MUX_SEL_SHIFT); +} +EXPORT_SYMBOL_GPL(pruss_cfg_set_gpmux); + static void pruss_of_free_clk_provider(void *data) { struct device_node *clk_mux_np = data; diff --git a/include/linux/remoteproc/pruss.h b/include/linux/remoteproc/pruss.h index bb001f712980..42f1586c62ac 100644 --- a/include/linux/remoteproc/pruss.h +++ b/include/linux/remoteproc/pruss.h @@ -16,6 +16,24 @@ #define PRU_RPROC_DRVNAME "pru-rproc" +/* + * enum pruss_gp_mux_sel - PRUSS GPI/O Mux modes for the + * PRUSS_GPCFG0/1 registers + * + * NOTE: The below defines are the most common values, but there + * are some exceptions like on 66AK2G, where the RESERVED and MII2 + * values are interchanged. Also, this bit-field does not exist on + * AM335x SoCs + */ +enum pruss_gp_mux_sel { + PRUSS_GP_MUX_SEL_GP = 0, + PRUSS_GP_MUX_SEL_ENDAT, + PRUSS_GP_MUX_SEL_RESERVED, + PRUSS_GP_MUX_SEL_SD, + PRUSS_GP_MUX_SEL_MII2, + PRUSS_GP_MUX_SEL_MAX, +}; + /* * enum pruss_gpi_mode - PRUSS GPI configuration modes, used * to program the PRUSS_GPCFG0/1 registers @@ -110,6 +128,8 @@ int pruss_cfg_gpimode(struct pruss *pruss, enum pruss_pru_id pru_id, int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable); int pruss_cfg_xfr_enable(struct pruss *pruss, enum pru_type pru_type, bool enable); +int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux); +int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux); #else @@ -152,6 +172,16 @@ static inline int pruss_cfg_xfr_enable(struct pruss *pruss, return ERR_PTR(-EOPNOTSUPP); } +static inline int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux) +{ + return ERR_PTR(-EOPNOTSUPP); +} + +static inline int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux) +{ + return ERR_PTR(-EOPNOTSUPP); +} + #endif /* CONFIG_TI_PRUSS */ #if IS_ENABLED(CONFIG_PRU_REMOTEPROC)