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b=aem801oTDhFCeVWz5uyqMXJM6NdAHkhRIxAmxgw/oUB2F7lIef1482nZ9PYiQuMub/8m5x 6AQpuhArQPYzzy8DEHNKC33PlocU8sHdfZsHyLenOYjySkHqYN8Jb5vkcL3IIKXqSycu4Y srKcd/SkEyW83wJUyCZgbmcpiIpXp1Q+I8rPEDcxsHmuya/ET4ar1WMio09k96LnPnRqj2 7S3YFDsmtKDyJVahpP3A0RFHuaVg9EJ0pTN9PkRrvGYjNv6ZBl7lxrtn1ihoQWbHVa7oH5 zbx1AEhpL+SEPthBFHYTr46KaifekmbBefYTAeu8jBrd/FxJ6XHz42CUF1mvQw== From: Jean-Michel Hautbois Date: Mon, 24 Nov 2025 14:04:08 +0100 Subject: [PATCH v3 3/3] m68k: coldfire: Add RNG support for MCF54418 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251124-b4-m5441x-add-rng-support-v3-3-f447251dad27@yoseli.org> References: <20251124-b4-m5441x-add-rng-support-v3-0-f447251dad27@yoseli.org> In-Reply-To: <20251124-b4-m5441x-add-rng-support-v3-0-f447251dad27@yoseli.org> To: Greg Ungerer , Geert Uytterhoeven , Olivia Mackall , Herbert Xu , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam Cc: linux-m68k@lists.linux-m68k.org, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Jean-Michel Hautbois X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1763989450; l=5131; i=jeanmichel.hautbois@yoseli.org; s=20240925; h=from:subject:message-id; bh=NLpSZfKUzPqHfyWjnO/4UQZgjeAox4imDnC6/Fqs5B0=; b=yV70yxGHw489i/dIhhda+Hq2AzNqJvKdwW/sAdszA3aTPmQGM0YbaIna2AC8Gcy5vikEku/cg fYwEFrd9kvjDA1g5ohnFjPigEu0+j+5nYA7cnZc0WPrwlQgH/1Evi2Z X-Developer-Key: i=jeanmichel.hautbois@yoseli.org; a=ed25519; pk=MsMTVmoV69wLIlSkHlFoACIMVNQFyvJzvsJSQsn/kq4= X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtdeggddvfeekieejucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomheplfgvrghnqdfoihgthhgvlhcujfgruhhtsghoihhsuceojhgvrghnmhhitghhvghlrdhhrghuthgsohhisheshihoshgvlhhirdhorhhgqeenucggtffrrghtthgvrhhnpeffjefhtdelhffhheevheeutefghfefteeluedvudfhgeegteeitddtuefhhfelteenucfkphepvdgrtddumegvtdgrmeduieelmeejudegtdemkeeksgefmeehudehfeemtgdvieegmeegfhgsnecuvehluhhsthgvrhfuihiivgepvdenucfrrghrrghmpehinhgvthepvdgrtddumegvtdgrmeduieelmeejudegtdemkeeksgefmeehudehfeemtgdvieegmeegfhgspdhhvghlohephihoshgvlhhiqdihohgtthhordihohhsvghlihdrohhrghdpmhgrihhlfhhrohhmpehjvggrnhhmihgthhgvlhdrhhgruhhtsghoihhsseihohhsvghlihdrohhrghdpnhgspghrtghpthhtohepudegpdhrtghpthhtohepjhgvrghnmhhitghhvghlrdhhrghuthgsohhisheshihoshgvlhhirdhorhhgpdhrtghpthhtoheplhhinhhugidqrghrmhdqkhgvrhhnvghlsehlihhsthhsrdhinhhfr hgruggvrggurdhorhhgpdhrtghpthhtohepghgvvghrtheslhhinhhugidqmheikehkrdhorhhgpdhrtghpthhtohephhgvrhgsvghrthesghhonhguohhrrdgrphgrnhgrrdhorhhgrdgruhdprhgtphhtthhopehfvghsthgvvhgrmhesghhmrghilhdrtghomhdprhgtphhtthhopehshhgrfihnghhuoheskhgvrhhnvghlrdhorhhgpdhrtghpthhtohepshdrhhgruhgvrhesphgvnhhguhhtrhhonhhigidruggvpdhrtghpthhtohepihhmgieslhhishhtshdrlhhinhhugidruggvvh X-GND-Sasl: jeanmichel.hautbois@yoseli.org Add support for the hardware Random Number Generator (RNGB) found on MCF54418 ColdFire processors with clock enabled at platform initialization. The RNGB block is compatible with the imx-rngc driver. Signed-off-by: Jean-Michel Hautbois Reviewed-by: Frank Li --- arch/m68k/coldfire/device.c | 28 ++++++++++++++++++++++++++++ arch/m68k/coldfire/m5441x.c | 2 +- arch/m68k/include/asm/m5441xsim.h | 9 +++++++++ drivers/char/hw_random/Kconfig | 3 ++- drivers/char/hw_random/imx-rngc.c | 7 +++++++ 5 files changed, 47 insertions(+), 2 deletions(-) diff --git a/arch/m68k/coldfire/device.c b/arch/m68k/coldfire/device.c index 20adba27a687029ef53249bad71b342d563d612b..4183929b0b501459da25d1b4cde= 7d77f19c3dc16 100644 --- a/arch/m68k/coldfire/device.c +++ b/arch/m68k/coldfire/device.c @@ -622,6 +622,31 @@ static struct platform_device mcf_flexcan0 =3D { }; #endif /* MCFFLEXCAN_SIZE */ =20 +#ifdef MCF_RNG_BASE +/* + * Random Number Generator (RNG) - only on MCF54418 + */ +static const struct resource mcf_rng_resource[] =3D { + { + .start =3D MCF_RNG_BASE, + .end =3D MCF_RNG_BASE + MCF_RNG_SIZE - 1, + .flags =3D IORESOURCE_MEM, + }, + { + .start =3D MCF_IRQ_RNG, + .end =3D MCF_IRQ_RNG, + .flags =3D IORESOURCE_IRQ, + }, +}; + +static struct platform_device mcf_rng =3D { + .name =3D "imx-rngc", + .id =3D -1, + .num_resources =3D ARRAY_SIZE(mcf_rng_resource), + .resource =3D mcf_rng_resource, +}; +#endif /* MCF_RNG_BASE */ + static struct platform_device *mcf_devices[] __initdata =3D { &mcf_uart, #ifdef MCFFEC_BASE0 @@ -660,6 +685,9 @@ static struct platform_device *mcf_devices[] __initdata= =3D { #ifdef MCFFLEXCAN_SIZE &mcf_flexcan0, #endif +#ifdef MCF_RNG_BASE + &mcf_rng, +#endif }; =20 /* diff --git a/arch/m68k/coldfire/m5441x.c b/arch/m68k/coldfire/m5441x.c index 7a25cfc7ac07570ff15da3c55d080a717cf93a06..ab5b006372379294db3b522820d= e88137bfb7e78 100644 --- a/arch/m68k/coldfire/m5441x.c +++ b/arch/m68k/coldfire/m5441x.c @@ -158,6 +158,7 @@ static struct clk * const enable_clks[] __initconst =3D= { &__clk_0_33, /* pit.1 */ &__clk_0_37, /* eport */ &__clk_0_48, /* pll */ + &__clk_0_49, /* rng */ &__clk_0_51, /* esdhc */ =20 &__clk_1_36, /* CCM/reset module/Power management */ @@ -179,7 +180,6 @@ static struct clk * const disable_clks[] __initconst = =3D { &__clk_0_44, /* usb otg */ &__clk_0_45, /* usb host */ &__clk_0_47, /* ssi.0 */ - &__clk_0_49, /* rng */ &__clk_0_50, /* ssi.1 */ &__clk_0_53, /* enet-fec */ &__clk_0_54, /* enet-fec */ diff --git a/arch/m68k/include/asm/m5441xsim.h b/arch/m68k/include/asm/m544= 1xsim.h index f48cf63bd7822fd53c33788128f984585c0c421a..dd64cdfcad3e810254c6854b9de= 5b6bbeb67b950 100644 --- a/arch/m68k/include/asm/m5441xsim.h +++ b/arch/m68k/include/asm/m5441xsim.h @@ -198,6 +198,15 @@ #define MCFRTC_SIZE (0xfc0a8840 - 0xfc0a8000) #define MCF_IRQ_RTC (MCFINT2_VECBASE + MCFINT2_RTC) =20 +/* + * Random Number Generator (RNG) Module. + * Note: Only present in MCF54418, not in MCF54410/54415/54417 + */ +#define MCF_RNG_BASE 0xfc0c4000 +#define MCF_RNG_SIZE 0x1c +#define MCFINT2_RNG 28 +#define MCF_IRQ_RNG (MCFINT2_VECBASE + MCFINT2_RNG) + /* * GPIO Module. */ diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig index 492a2a61a65be8bd9e46b0a70f3e43703973512e..2f301e43db846c687a38377a164= 429818137ece2 100644 --- a/drivers/char/hw_random/Kconfig +++ b/drivers/char/hw_random/Kconfig @@ -270,12 +270,13 @@ config HW_RANDOM_MXC_RNGA config HW_RANDOM_IMX_RNGC tristate "Freescale i.MX RNGC Random Number Generator" depends on HAS_IOMEM - depends on SOC_IMX25 || SOC_IMX6SL || SOC_IMX6SLL || SOC_IMX6UL || COMPIL= E_TEST + depends on SOC_IMX25 || SOC_IMX6SL || SOC_IMX6SLL || SOC_IMX6UL || COLDFI= RE || COMPILE_TEST default HW_RANDOM help This driver provides kernel-side support for the Random Number Generator Version C hardware found on some Freescale i.MX processors. Version B is also supported by this driver. + Also supports RNGB on Freescale MCF54418 (Coldfire V4e). =20 To compile this driver as a module, choose M here: the module will be called imx-rngc. diff --git a/drivers/char/hw_random/imx-rngc.c b/drivers/char/hw_random/imx= -rngc.c index d6a847e48339b2758c73c95d57a7aa48eb4875e0..44f20a05de0a425cb6ff7b2a347= b111750ac3702 100644 --- a/drivers/char/hw_random/imx-rngc.c +++ b/drivers/char/hw_random/imx-rngc.c @@ -353,12 +353,19 @@ static const struct of_device_id imx_rngc_dt_ids[] = =3D { }; MODULE_DEVICE_TABLE(of, imx_rngc_dt_ids); =20 +static const struct platform_device_id imx_rngc_devtype[] =3D { + { .name =3D "imx-rngc" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, imx_rngc_devtype); + static struct platform_driver imx_rngc_driver =3D { .driver =3D { .name =3D KBUILD_MODNAME, .pm =3D pm_ptr(&imx_rngc_pm_ops), .of_match_table =3D imx_rngc_dt_ids, }, + .id_table =3D imx_rngc_devtype, }; =20 module_platform_driver_probe(imx_rngc_driver, imx_rngc_probe); --=20 2.39.5