[PATCH] rng: Tighten some rng driver dependencies

[Tom Rini]

In this case, the NPCM RNG driver also provides some of the functions
that are implemented in the generic LIB_RAND file, so only allow this to
be built when that is disabled. The exynos RNG driver depends on ARM
SMCCC calls and so cannot be built outside of that. Express these
requirements in Kconfig as well.

Signed-off-by: Tom Rini <trini at konsulko.com>
---
 drivers/rng/Kconfig | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/rng/Kconfig b/drivers/rng/Kconfig
index b35d8c66b9c6..19b2b7076774 100644
--- a/drivers/rng/Kconfig
+++ b/drivers/rng/Kconfig
@@ -40,7 +40,7 @@ config RNG_MSM
 
 config RNG_NPCM
 	bool "Nuvoton NPCM SoCs Random Number Generator support"
-	depends on DM_RNG
+	depends on DM_RNG && !LIB_RAND
 	help
 	  Enable random number generator on NPCM SoCs.
 	  This unit can provide 750 to 1000 random bits per second
@@ -122,7 +122,7 @@ config RNG_TURRIS_RWTM
 
 config RNG_EXYNOS
 	bool "Samsung Exynos True Random Number Generator support"
-	depends on DM_RNG
+	depends on DM_RNG && ARM
 	help
 	  Enable support for True Random Number Generator (TRNG) available on
 	  Exynos SoCs.
-- 
2.43.0