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Date: Wed, 24 Apr 2024 20:51:23 +0200
From: Marek =?UTF-8?B?QmVow7pu?= <kabel@kernel.org>
To: Andy Shevchenko <andy@kernel.org>
List-Id: <soc.lore.kernel.org>
Cc: Gregory CLEMENT <gregory.clement@bootlin.com>, Arnd Bergmann
 <arnd@arndb.de>, soc@kernel.org, arm@kernel.org, Hans de Goede
 <hdegoede@redhat.com>, Ilpo =?UTF-8?B?SsOkcnZpbmVu?=
 <ilpo.jarvinen@linux.intel.com>, Olivia Mackall <olivia@selenic.com>,
 Herbert Xu <herbert@gondor.apana.org.au>, Greg Kroah-Hartman
 <gregkh@linuxfoundation.org>, linux-crypto@vger.kernel.org
Subject: Re: [PATCH v7 6/9] platform: cznic: turris-omnia-mcu: Add support
 for MCU provided TRNG
Message-ID: <20240424205123.5fc82a1a@dellmb>
In-Reply-To: <ZilQiHLLj1eQxP2L@smile.fi.intel.com>
References: <20240424173809.7214-1-kabel@kernel.org>
	<20240424173809.7214-7-kabel@kernel.org>
	<ZilQiHLLj1eQxP2L@smile.fi.intel.com>
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On Wed, 24 Apr 2024 21:33:44 +0300
Andy Shevchenko <andy@kernel.org> wrote:

> On Wed, Apr 24, 2024 at 07:38:05PM +0200, Marek Beh=C3=BAn wrote:
> > Add support for true random number generator provided by the MCU.
> > New Omnia boards come without the Atmel SHA204-A chip. Instead the
> > crypto functionality is provided by new microcontroller, which has
> > a TRNG peripheral. =20
>=20
> ...
>=20
> > +static void omnia_irq_mapping_drop(void *res)
> > +{
> > +	irq_dispose_mapping((unsigned int)(unsigned long)res);
> > +} =20
>=20
> Leftover?

What do you mean? I dropped the devm-helpers.h changes, now I do
devm_add_action_or_reset() manually, with this function as the action.

> > +int omnia_mcu_register_trng(struct omnia_mcu *mcu)
> > +{
> > +	struct device *dev =3D &mcu->client->dev;
> > +	u8 irq_idx, dummy;
> > +	int irq, err;
> > +
> > +	if (!(mcu->features & FEAT_TRNG))
> > +		return 0;
> > +
> > +	irq_idx =3D omnia_int_to_gpio_idx[__bf_shf(INT_TRNG)];
> > +	irq =3D gpiod_to_irq(gpiochip_get_desc(&mcu->gc, irq_idx));
> > +	if (irq < 0)
> > +		return dev_err_probe(dev, irq, "Cannot get TRNG IRQ\n"); =20
>=20
> > +	err =3D devm_add_action_or_reset(dev, omnia_irq_mapping_drop,
> > +				       (void *)(unsigned long)irq);
> > +	if (err)
> > +		return err; =20
>=20
> Are you sure it's correct now?

Yes, why wouldn't it?