RE: [PATCH V4 2/4] mailbox: imx: restructure code to make easy for new MU

[Peng Fan <peng.fan@nxp.com>]

Hi Oleksij,

> Subject: Re: [PATCH V4 2/4] mailbox: imx: restructure code to make easy for
> new MU
> 
> 
> 
> On 03.03.20 02:52, peng.fan@nxp.com wrote:
> > From: Peng Fan <peng.fan@nxp.com>
> >
> > Add imx_mu_generic_tx for data send and imx_mu_generic_rx for
> > interrupt data receive.
> >
> > Pack original mu chans related code into imx_mu_init_generic
> >
> > With these, it will be a bit easy to introduce i.MX8/8X SCU type MU
> > dedicated to communicate with SCU.
> >
> > Signed-off-by: Peng Fan <peng.fan@nxp.com>
> > ---
> > V4:
> >   Pack MU chans init to imx_mu_init_generic
> > V3:
> >   New patch, restructure code.
> >
> >   drivers/mailbox/imx-mailbox.c | 127
> ++++++++++++++++++++++++++----------------
> >   1 file changed, 78 insertions(+), 49 deletions(-)
> >
> > diff --git a/drivers/mailbox/imx-mailbox.c
> > b/drivers/mailbox/imx-mailbox.c index 2cdcdc5f1119..e98f3550f995
> > 100644
> > --- a/drivers/mailbox/imx-mailbox.c
> > +++ b/drivers/mailbox/imx-mailbox.c
> > @@ -36,7 +36,12 @@ enum imx_mu_chan_type {
> >   	IMX_MU_TYPE_RXDB,	/* Rx doorbell */
> >   };
> >
> > +struct imx_mu_priv;
> > +struct imx_mu_con_priv;
> 
> Please move imx_mu_dcfg below struct imx_mu_priv. It was my mistaked, i
> missed this point.

That's fine.

> 
> >   struct imx_mu_dcfg {
> > +	int (*tx)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp, void
> *data);
> > +	int (*rx)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp);
> 
> please add init function here as well.

ok. I'll add as below:

int (*init)(struct imx_mu_priv *priv);

> 
> >   	u32	xTR[4];		/* Transmit Registers */
> >   	u32	xRR[4];		/* Receive Registers */
> >   	u32	xSR;		/* Status Register */
[....]

> > -
> >   	priv->side_b = of_property_read_bool(np, "fsl,mu-side-b");
> >
> > +	imx_mu_init_generic(priv);
> 
> please use priv->dcfg->init(priv);

I assume you agree the code I packed in imx_mu_init_generic.
I just need to assign init = imx_mu_init_generic; And use priv->dcfg->init(priv),
right?

Thanks,
Peng.

> 
> > +
> >   	spin_lock_init(&priv->xcr_lock);
> >
> >   	priv->mbox.dev = dev;
> >   	priv->mbox.ops = &imx_mu_ops;
> >   	priv->mbox.chans = priv->mbox_chans;
> > -	priv->mbox.num_chans = IMX_MU_CHANS;
> > -	priv->mbox.of_xlate = imx_mu_xlate;
> >   	priv->mbox.txdone_irq = true;
> >
> >   	platform_set_drvdata(pdev, priv);
> >
> > -	imx_mu_init_generic(priv);
> > -
> >   	return devm_mbox_controller_register(dev, &priv->mbox);
> >   }
> >
> > @@ -367,6 +378,24 @@ static int imx_mu_remove(struct platform_device
> *pdev)
> >   	return 0;
> >   }
> >
> > +static const struct imx_mu_dcfg imx_mu_cfg_imx6sx = {
> > +	.tx	= imx_mu_generic_tx,
> > +	.rx	= imx_mu_generic_rx,
> > +	.xTR	= {0x0, 0x4, 0x8, 0xc},
> > +	.xRR	= {0x10, 0x14, 0x18, 0x1c},
> > +	.xSR	= 0x20,
> > +	.xCR	= 0x24,
> > +};
> > +
> > +static const struct imx_mu_dcfg imx_mu_cfg_imx7ulp = {
> > +	.tx	= imx_mu_generic_tx,
> > +	.rx	= imx_mu_generic_rx,
> > +	.xTR	= {0x20, 0x24, 0x28, 0x2c},
> > +	.xRR	= {0x40, 0x44, 0x48, 0x4c},
> > +	.xSR	= 0x60,
> > +	.xCR	= 0x64,
> > +};
> > +
> >   static const struct of_device_id imx_mu_dt_ids[] = {
> >   	{ .compatible = "fsl,imx7ulp-mu", .data = &imx_mu_cfg_imx7ulp },
> >   	{ .compatible = "fsl,imx6sx-mu", .data = &imx_mu_cfg_imx6sx },
> >
> 
> Kind regards,
> Oleksij Rempel
> 
> --
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