linux-kernel - [PATCH] hwrng: nomadik: add ARM

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Message-Id: <20250729152804.2411621-1-arnd@kernel.org>
Date: Tue, 29 Jul 2025 17:28:00 +0200
From: Arnd Bergmann <arnd@...nel.org>
To: Olivia Mackall <olivia@...enic.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Cai Huoqing <cai.huoqing@...ux.dev>
Cc: Arnd Bergmann <arnd@...db.de>,
	Dragan Simic <dsimic@...jaro.org>,
	Francesco Dolcini <francesco.dolcini@...adex.com>,
	Daniel Golle <daniel@...rotopia.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Christian Marangi <ansuelsmth@...il.com>,
	Aurelien Jarno <aurelien@...el32.net>,
	Markus Mayer <mmayer@...adcom.com>,
	Lukas Bulwahn <lukas.bulwahn@...hat.com>,
	Nicolas Frattaroli <nicolas.frattaroli@...labora.com>,
	linux-crypto@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] hwrng: nomadik: add ARM_AMBA dependency

From: Arnd Bergmann <arnd@...db.de>

Compile-testing this driver is only possible when the AMBA bus driver is
available in the kernel:

x86_64-linux-ld: drivers/char/hw_random/nomadik-rng.o: in function `nmk_rng_remove':
nomadik-rng.c:(.text+0x67): undefined reference to `amba_release_regions'
x86_64-linux-ld: drivers/char/hw_random/nomadik-rng.o: in function `nmk_rng_probe':
nomadik-rng.c:(.text+0xee): undefined reference to `amba_request_regions'
x86_64-linux-ld: nomadik-rng.c:(.text+0x18d): undefined reference to `amba_release_regions'

The was previously implied by the 'depends on ARCH_NOMADIK', but needs to be
specified for the COMPILE_TEST case.

Fixes: d5e93b3374e4 ("hwrng: Kconfig - Add helper dependency on COMPILE_TEST")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/char/hw_random/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index 3227dcaa9111..aef4406973f3 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -312,6 +312,7 @@ config HW_RANDOM_INGENIC_TRNG
 config HW_RANDOM_NOMADIK
 	tristate "ST-Ericsson Nomadik Random Number Generator support"
 	depends on ARCH_NOMADIK || COMPILE_TEST
+	depends on ARM_AMBA
 	default HW_RANDOM
 	help
 	  This driver provides kernel-side support for the Random Number
-- 
2.39.5