linux-kernel - Re: [PATCH 4/4] hwrng: imx-rngc: enable driver for i.MX6

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Date:   Fri, 19 Jun 2020 18:46:04 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Horia Geantă <horia.geanta@....com>
Cc:     Rob Herring <robh+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Matt Mackall <mpm@...enic.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Martin Kaiser <martin@...ser.cx>,
        Franck Lenormand <franck.lenormand@....com>,
        Iuliana Prodan <iuliana.prodan@....com>,
        Silvano Di Ninno <silvano.dininno@....com>,
        "open list:HARDWARE RANDOM NUMBER GENERATOR CORE" 
        <linux-crypto@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/4] hwrng: imx-rngc: enable driver for i.MX6

On Fri, Jun 19, 2020 at 6:34 PM Horia Geantă <horia.geanta@....com> wrote:
>
> i.MX6 SL, SLL, ULL, ULZ SoCs have an RNGB block.
>
> Since imx-rngc driver supports also rngb,
> let's enable it for these SoCs too.
>
> Signed-off-by: Horia Geantă <horia.geanta@....com>
> ---
>  drivers/char/hw_random/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
> index 0ad17efc96df..53f6a7e4392f 100644
> --- a/drivers/char/hw_random/Kconfig
> +++ b/drivers/char/hw_random/Kconfig
> @@ -245,7 +245,7 @@ config HW_RANDOM_MXC_RNGA
>  config HW_RANDOM_IMX_RNGC
>         tristate "Freescale i.MX RNGC Random Number Generator"
>         depends on HAS_IOMEM && HAVE_CLK
> -       depends on SOC_IMX25 || COMPILE_TEST
> +       depends on SOC_IMX25 || SOC_IMX6SL || SOC_IMX6SLL || SOC_IMX6UL || COMPILE_TEST

If in the future more SoCs will use this IP, then we will need to keep
extending this list over and over again.

Maybe you could use:

depends on MACH_IMX || COMPILE_TEST



>         default HW_RANDOM
>         help
>           This driver provides kernel-side support for the Random Number
> --
> 2.17.1
>