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SubjectRe: [PATCH 3/3] pwm: jz4740: Add support for the JZ4725B
Hello Paul,

On Sun, May 24, 2020 at 07:51:23PM +0200, Paul Cercueil wrote:
> Le dim. 24 mai 2020 à 19:37, Uwe Kleine-König
> <u.kleine-koenig@pengutronix.de> a écrit :
> > On Mon, Apr 13, 2020 at 02:14:45PM +0200, Paul Cercueil wrote:
> > > @@ -214,6 +218,7 @@ static int jz4740_pwm_probe(struct
> > > platform_device *pdev)
> > > {
> > > struct device *dev = &pdev->dev;
> > > struct jz4740_pwm_chip *jz4740;
> > > + const struct soc_info *info = device_get_match_data(dev);
> > >
> > > jz4740 = devm_kzalloc(dev, sizeof(*jz4740), GFP_KERNEL);
> > > if (!jz4740)
> > > @@ -227,8 +232,8 @@ static int jz4740_pwm_probe(struct
> > > platform_device *pdev)
> > >
> > > jz4740->chip.dev = dev;
> > > jz4740->chip.ops = &jz4740_pwm_ops;
> > > - jz4740->chip.npwm = NUM_PWM;
> > > jz4740->chip.base = -1;
> > > + jz4740->chip.npwm = info ? info->num_pwms : NUM_PWM;
> >
> > Can info be actually NULL? I don't think so, so you can just use
> > info->num_pwms here and drop the definition of NUM_PWM.
>
> In *theory* it can be NULL if the kernel is configured without CONFIG_OF,
> which will never happen on any board supported by this driver. I can add a
> dependency on CONFIG_OF in V2, then use info->num_pwms there.

I'd prefer just something like:

if (!info)
return -EINVAL;

instead of a dependency on CONFIG_OF.

Best regards
Uwe

--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | https://www.pengutronix.de/ |

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