Hi Roger,
On 08/03/23 14:04, Roger Quadros wrote:
> Hi Danish,
>
> On 06/03/2023 13:09, MD Danish Anwar wrote:
>> From: Suman Anna <s-anna@xxxxxx>
>>
>> The PRUSS CFG module is represented as a syscon node and is currently
>> managed by the PRUSS platform driver. Add easy accessor functions to set
>> GPI mode, MII_RT event enable/disable and XFR (XIN XOUT) enable/disable
>> to enable the PRUSS Ethernet usecase. These functions reuse the generic
>> pruss_cfg_update() API function.
>>
>> Signed-off-by: Suman Anna <s-anna@xxxxxx>
>> Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@xxxxxxxxxx>
>> Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@xxxxxxxxxx>
>> Signed-off-by: Puranjay Mohan <p-mohan@xxxxxx>
>> ---
>> include/linux/remoteproc/pruss.h | 55 ++++++++++++++++++++++++++++++++
>> 1 file changed, 55 insertions(+)
>>
>> diff --git a/include/linux/remoteproc/pruss.h b/include/linux/remoteproc/pruss.h
>> index d41bec448f06..7952f250301a 100644
>> --- a/include/linux/remoteproc/pruss.h
>> +++ b/include/linux/remoteproc/pruss.h
>> @@ -240,4 +240,59 @@ static inline bool is_pru_rproc(struct device *dev)
>> return true;
>> }
>>
>> +/**
>> + * pruss_cfg_gpimode() - set the GPI mode of the PRU
>> + * @pruss: the pruss instance handle
>> + * @pru_id: id of the PRU core within the PRUSS
>> + * @mode: GPI mode to set
>> + *
>> + * Sets the GPI mode for a given PRU by programming the
>> + * corresponding PRUSS_CFG_GPCFGx register
>> + *
>> + * Return: 0 on success, or an error code otherwise
>> + */
>> +static inline int pruss_cfg_gpimode(struct pruss *pruss,
>> + enum pruss_pru_id pru_id,
>> + enum pruss_gpi_mode mode)
>> +{
>> + if (pru_id < 0 || pru_id >= PRUSS_NUM_PRUS)
>> + return -EINVAL;
>> +
>
> Should we check for invalid gpi mode and error out if so?
>
Sure we can check for invalid gpi mode.
Does the below code snippet looks good to you?
if(mode < PRUSS_GPI_MODE_DIRECT || mode > PRUSS_GPI_MODE_MII)
return -EINVAL;
>> + return pruss_cfg_update(pruss, PRUSS_CFG_GPCFG(pru_id),
>> + PRUSS_GPCFG_PRU_GPI_MODE_MASK,
>> + mode << PRUSS_GPCFG_PRU_GPI_MODE_SHIFT);
>> +}
>> +
>> +/**
>> + * pruss_cfg_miirt_enable() - Enable/disable MII RT Events
>> + * @pruss: the pruss instance
>> + * @enable: enable/disable
>> + *
>> + * Enable/disable the MII RT Events for the PRUSS.
>> + *
>> + * Return: 0 on success, or an error code otherwise
>> + */
>> +static inline int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable)
>> +{
>> + u32 set = enable ? PRUSS_MII_RT_EVENT_EN : 0;
>> +
>> + return pruss_cfg_update(pruss, PRUSS_CFG_MII_RT,
>> + PRUSS_MII_RT_EVENT_EN, set);
>> +}
>> +
>> +/**
>> + * pruss_cfg_xfr_enable() - Enable/disable XIN XOUT shift functionality
>> + * @pruss: the pruss instance
>> + * @enable: enable/disable
>> + *
>> + * Return: 0 on success, or an error code otherwise
>> + */
>> +static inline int pruss_cfg_xfr_enable(struct pruss *pruss, bool enable)
>> +{
>> + u32 set = enable ? PRUSS_SPP_XFER_SHIFT_EN : 0;
>> +
>> + return pruss_cfg_update(pruss, PRUSS_CFG_SPP,
>> + PRUSS_SPP_XFER_SHIFT_EN, set);
>> +}
>> +
>> #endif /* __LINUX_PRUSS_H */
>
> cheers,
> -roger
--
Thanks and Regards,
Danish.
