linux-kernel - [PATCH 3/3] hwrng: imx-rngc

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Message-ID: <20200727105718.26225-4-ceggers@arri.de>
Date:   Mon, 27 Jul 2020 12:57:16 +0200
From:   Christian Eggers <ceggers@...i.de>
To:     Rob Herring <robh+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
        "Sascha Hauer" <s.hauer@...gutronix.de>
CC:     Christian Eggers <ceggers@...i.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Matt Mackall <mpm@...enic.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Arnd Bergmann <arnd@...db.de>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        Martin Kaiser <martin@...ser.cx>,
        PrasannaKumar Muralidharan <prasannatsmkumar@...il.com>,
        Anson Huang <Anson.Huang@....com>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-crypto@...r.kernel.org>
Subject: [PATCH 3/3] hwrng: imx-rngc - setup default RNG quality

When hw_random device's quality is non-zero, it will automatically fill
the kernel's entropy pool at boot.  For this purpose, one conservative
quality value is being picked up as the default value.

Signed-off-by: Christian Eggers <ceggers@...i.de>
---
 drivers/char/hw_random/imx-rngc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/char/hw_random/imx-rngc.c b/drivers/char/hw_random/imx-rngc.c
index f9c5ddd0276b..a62ff78bd7ea 100644
--- a/drivers/char/hw_random/imx-rngc.c
+++ b/drivers/char/hw_random/imx-rngc.c
@@ -285,6 +285,7 @@ static int imx_rngc_probe(struct platform_device *pdev)
 	rngc->rng.init = imx_rngc_init;
 	rngc->rng.read = imx_rngc_read;
 	rngc->rng.cleanup = imx_rngc_cleanup;
+	rngc->rng.quality = 900;
 
 	rngc->dev = &pdev->dev;
 	platform_set_drvdata(pdev, rngc);
-- 
Christian Eggers
Embedded software developer

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