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From: Tony Lindgren <tony@atomide.com>
To: Philipp Zabel <p.zabel@pengutronix.de>
Cc: linux-omap@vger.kernel.org, "Andrew F . Davis" <afd@ti.com>,
	Dave Gerlach <d-gerlach@ti.com>, Faiz Abbas <faiz_abbas@ti.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Grygorii Strashko <grygorii.strashko@ti.com>,
	Keerthy <j-keerthy@ti.com>, Nishanth Menon <nm@ti.com>,
	Peter Ujfalusi <peter.ujfalusi@ti.com>,
	Roger Quadros <rogerq@ti.com>, Suman Anna <s-anna@ti.com>,
	Tero Kristo <t-kristo@ti.com>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-remoteproc@vger.kernel.org,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Michael Turquette <mturquette@baylibre.com>,
	Santosh Shilimkar <ssantosh@kernel.org>,
	Stephen Boyd <sboyd@kernel.org>,
	linux-clk@vger.kernel.org
Subject: Re: [PATCH 9/9] remoteproc/wkup_m3: Use reset control driver if available
Date: Mon, 26 Oct 2020 15:02:38 +0200	[thread overview]
Message-ID: <20201026130238.GA5639@atomide.com> (raw)
In-Reply-To: <c8ea80c2eb79f80539911f3563398957beedaa41.camel@pengutronix.de>

Hi,

* Philipp Zabel <p.zabel@pengutronix.de> [201026 11:35]:
> On Mon, 2020-10-26 at 13:10 +0200, Tony Lindgren wrote:
> > @@ -57,6 +60,9 @@ static int wkup_m3_rproc_start(struct rproc *rproc)
> >  	struct device *dev = &pdev->dev;
> >  	struct wkup_m3_platform_data *pdata = dev_get_platdata(dev);
> >  
> > +	if (wkupm3->rsts)
> 
> No need for this check, reset_control_deassert() just returns 0 if the
> rstc parameter is NULL.
> 
> > +		return reset_control_deassert(wkupm3->rsts);
> > +
> >  	if (pdata->deassert_reset(pdev, pdata->reset_name)) {
> >  		dev_err(dev, "Unable to reset wkup_m3!\n");
> >  		return -ENODEV;
> > @@ -72,6 +78,9 @@ static int wkup_m3_rproc_stop(struct rproc *rproc)
> >  	struct device *dev = &pdev->dev;
> >  	struct wkup_m3_platform_data *pdata = dev_get_platdata(dev);
> >  
> > +	if (wkupm3->rsts)
> 
> Same as above.

OK great.

> > +		return reset_control_assert(wkupm3->rsts);
> > +
> >  	if (pdata->assert_reset(pdev, pdata->reset_name)) {
> >  		dev_err(dev, "Unable to assert reset of wkup_m3!\n");
> >  		return -ENODEV;
> > @@ -132,12 +141,6 @@ static int wkup_m3_rproc_probe(struct platform_device *pdev)
> >  	int ret;
> >  	int i;
> >  
> > -	if (!(pdata && pdata->deassert_reset && pdata->assert_reset &&
> > -	      pdata->reset_name)) {
> > -		dev_err(dev, "Platform data missing!\n");
> > -		return -ENODEV;
> > -	}
> > -
> >  	ret = of_property_read_string(dev->of_node, "ti,pm-firmware",
> >  				      &fw_name);
> >  	if (ret) {
> > @@ -165,6 +168,17 @@ static int wkup_m3_rproc_probe(struct platform_device *pdev)
> >  	wkupm3->rproc = rproc;
> >  	wkupm3->pdev = pdev;
> >  
> > +	wkupm3->rsts = devm_reset_control_get_optional_shared(dev, "rstctrl");
> > +	if (PTR_ERR_OR_ZERO(wkupm3->rsts)) {
> 
> Please properly return errors. rsts will be NULL if the optional rstctrl
> reset is not specified:
> 
> 	if (IS_ERR(wkump3->rsts))
> 		return PTR_ERR(wkump3->rsts);

OK thanks will do.

> 	if (!wkump3->rsts) {
> > +		if (!(pdata && pdata->deassert_reset && pdata->assert_reset &&
> > +		      pdata->reset_name)) {
> > +			dev_err(dev, "Platform data missing!\n");
> > +			ret = -ENODEV;
> > +			goto err_put_rproc;
> > +		}
> > +		wkupm3->rsts = NULL;
> 
> I assume this will later be dropped with the platform data support?

Yes once also am437x has been updated to probe with dts data only we
can drop the custom callbacks.

Regards,

Tony

  reply	other threads:[~2020-10-26 13:02 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-26 11:10 [PATCH 0/9] Genpd related code changes to drop am335x pdata Tony Lindgren
2020-10-26 11:10 ` [PATCH 1/9] ARM: OMAP2+: Check for inited flag Tony Lindgren
2020-10-26 11:10 ` [PATCH 2/9] ARM: OMAP2+: Probe PRCM first to probe l4_wkup with simple-pm-bus Tony Lindgren
2020-10-26 11:10 ` [PATCH 3/9] clk: ti: am33xx: Keep am3 l3 main clock always on for genpd Tony Lindgren
2020-10-26 11:10 ` [PATCH 4/9] bus: ti-sysc: Support modules without control registers Tony Lindgren
2020-10-26 11:10 ` [PATCH 5/9] bus: ti-sysc: Implement GPMC debug quirk to drop platform data Tony Lindgren
2020-10-26 11:10 ` [PATCH 6/9] soc: ti: omap-prm: Add pm_clk for genpd Tony Lindgren
2020-10-26 11:10 ` [PATCH 7/9] soc: ti: omap-prm: am3: add genpd support for remaining PRM instances Tony Lindgren
2020-10-26 11:10 ` [PATCH 8/9] soc: ti: pm33xx: Enable basic PM runtime support for genpd Tony Lindgren
2020-10-26 11:10 ` [PATCH 9/9] remoteproc/wkup_m3: Use reset control driver if available Tony Lindgren
2020-10-26 11:35   ` Philipp Zabel
2020-10-26 13:02     ` Tony Lindgren [this message]
2020-10-26 13:13 ` [PATCH 0/9] Genpd related code changes to drop am335x pdata Tony Lindgren
2020-11-10 11:20 [PATCHv2 " Tony Lindgren
2020-11-10 11:20 ` [PATCH 9/9] remoteproc/wkup_m3: Use reset control driver if available Tony Lindgren

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