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authorSam Protsenko <semen.protsenko@linaro.org>2024-07-23 13:14:39 -0500
committerMinkyu Kang <mk7.kang@samsung.com>2024-07-24 16:37:09 +0900
commit2269217bbddb3d729f6129dceda8da5b1c73ba05 (patch)
tree294470ece86ea0e11f0a65de68ef70e6537faf1b /arch/arm
parent9344efc9bb7a28a1aca395d2762ca2d5dc128405 (diff)
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arm: exynos: Enable TRNG on E850-96 board
Enable True Random Number Generator (TRNG) on E850-96 board. To do so: 1. Enable DM_RNG and RNG_EXYNOS for TARGET_E850_96 2. Add TRNG node to E850-96 device tree 3. Enable 'rng' command support for easy TRNG testing TRNG node is already applied in Linux kernel device tree, but it hasn't appeared in upstream dts yet. Add it in U-Boot override dtsi file temporarily; it can be removed once it appears in upstream dts. Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/dts/exynos850-e850-96-u-boot.dtsi11
-rw-r--r--arch/arm/mach-exynos/Kconfig2
2 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm/dts/exynos850-e850-96-u-boot.dtsi b/arch/arm/dts/exynos850-e850-96-u-boot.dtsi
index 6d7148f726..3aa5d8bb10 100644
--- a/arch/arm/dts/exynos850-e850-96-u-boot.dtsi
+++ b/arch/arm/dts/exynos850-e850-96-u-boot.dtsi
@@ -3,6 +3,17 @@
* Copyright (c) 2023 Linaro Ltd.
*/
+&soc {
+ /* TODO: Remove this node once it appears in upstream dts */
+ trng: rng@12081400 {
+ compatible = "samsung,exynos850-trng";
+ reg = <0x12081400 0x100>;
+ clocks = <&cmu_core CLK_GOUT_SSS_ACLK>,
+ <&cmu_core CLK_GOUT_SSS_PCLK>;
+ clock-names = "secss", "pclk";
+ };
+};
+
&pmu_system_controller {
bootph-all;
samsung,uart-debug-1;
diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index cad8bb044c..3fee5a4299 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -250,6 +250,8 @@ config TARGET_E850_96
select PINCTRL
select PINCTRL_EXYNOS850
imply OF_UPSTREAM
+ imply DM_RNG
+ imply RNG_EXYNOS
endchoice
endif