linux-kernel - Re: [PATCH v2 2/4] pinctrl: Add NVIDIA Tegra XUSB pad controller support

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Date:	Thu, 12 Jun 2014 09:22:21 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Andrew Bresticker <abrestic@...omium.org>
Cc:	Linus Walleij <linus.walleij@...aro.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/4] pinctrl: Add NVIDIA Tegra XUSB pad controller
 support

On Wed, Jun 11, 2014 at 01:23:59PM -0700, Andrew Bresticker wrote:
> On Tue, Jun 10, 2014 at 4:11 AM, Thierry Reding <thierry.reding@...il.com> wrote:
[...]
> > +static int tegra_xusb_padctl_pinconf_group_set(struct pinctrl_dev *pinctrl,
> > +                                              unsigned int group,
> > +                                              unsigned long *configs,
> > +                                              unsigned int num_configs)
> > +{
> > +       struct tegra_xusb_padctl *padctl = pinctrl_dev_get_drvdata(pinctrl);
> > +       const struct tegra_xusb_padctl_lane *lane;
> > +       enum tegra_xusb_padctl_param param;
> > +       unsigned int i;
> > +       u32 value;
> > +
> > +       lane = &padctl->soc->lanes[group];
> > +
> > +       for (i = 0; i < num_configs; i++) {
> > +               param = TEGRA_XUSB_PADCTL_UNPACK_PARAM(configs[i]);
> > +               value = TEGRA_XUSB_PADCTL_UNPACK_VALUE(configs[i]);
> > +
> > +               switch (param) {
> > +               case TEGRA_XUSB_PADCTL_IDDQ:
> > +                       value = padctl_readl(padctl, lane->offset);
> 
> This overwrites the configuration value - probably want to use a
> separate variable for the register value.

Good catch, thanks.

Thierry

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