Re: [PATCH v3 1/7] mfd: add pruss mfd driver.

[Subhasish Ghosh]

> On Wednesday 30 March 2011, Subhasish Ghosh wrote:
> > >> +s32 pruss_disable(struct device *dev, u8 pruss_num)
> > >> +{
> > >> + struct da8xx_pruss *pruss = dev_get_drvdata(dev->parent);
> > >> + struct da8xx_prusscore_regs *h_pruss;
> > >> + struct pruss_map *pruss_mmap = (struct pruss_map *)pruss->ioaddr;
> > >> + u32 temp_reg;
> > >> + u32 delay_cnt;
> > >
> > > Can you explain the significance of pruss_num? As far as I
> > > can tell, you always pass constants in here, so it should
> > > be possible to determine the number from the device.
> >
> > SG - The number is not programmed in the device, I need something to 
> > decide
> > which PRU to disable or enable.
>
> I still don't understand. Please explain how the devices
> relate to the multiple PRUs in hardware.

There are two devices, CAN and UART, in our case we use the PRU as follows:
1. CAN-TX on PRU0, CAN-RX on PRU1
2. SUART-TX on PRU0, SUART-RX on PRU1
3. SUART-TXRX on PRU0, SUART-TXRX on PRU1




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