linux-kernel - Re: [PATCH 6/7] hwrng: exynos: Enable Exynos850 support

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Date: Tue, 18 Jun 2024 08:39:10 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Sam Protsenko <semen.protsenko@...aro.org>,
 Łukasz Stelmach <l.stelmach@...sung.com>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Rob Herring <robh@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>
Cc: Olivia Mackall <olivia@...enic.com>,
 Herbert Xu <herbert@...dor.apana.org.au>,
 Alim Akhtar <alim.akhtar@...sung.com>, linux-samsung-soc@...r.kernel.org,
 linux-crypto@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/7] hwrng: exynos: Enable Exynos850 support

On 18/06/2024 02:37, Sam Protsenko wrote:
> Add Exynos850 compatible and its driver data. It's only possible to
> access TRNG block via SMC calls in Exynos850, so specify that fact using
> QUIRK_SMC in the driver data.
> 
> Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
> ---
>  drivers/char/hw_random/exynos-trng.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/char/hw_random/exynos-trng.c b/drivers/char/hw_random/exynos-trng.c
> index 98b7a8ebb909..3368a08df9ce 100644
> --- a/drivers/char/hw_random/exynos-trng.c
> +++ b/drivers/char/hw_random/exynos-trng.c
> @@ -333,6 +333,9 @@ static DEFINE_SIMPLE_DEV_PM_OPS(exynos_trng_pm_ops, exynos_trng_suspend,
>  static const struct of_device_id exynos_trng_dt_match[] = {
>  	{
>  		.compatible = "samsung,exynos5250-trng",
> +	}, {
> +		.compatible = "samsung,exynos850-trng",
> +		.data = (void *)QUIRK_SMC,

Probably this (and in previous patch) should be called flags, not
quirks. Quirks are for work-arounds.

Best regards,
Krzysztof