[PATCH] arm64: renesas: Initialize GIC600 fully on R-Car S4/V4H/V4M

[Marek Vasut]

ARM GIC-600 IP complies with ARM GICv3 architecture, but among others,
implements a power control register in the Redistributor frame. This
register must be programmed to mark the frame as powered on, before
accessing other registers in the frame.

Before the switch to generic lowlevel_init function, this did not pose
a problem as the previous custom lowlevel_init did not access the GICR
registers. The generic function does and that does lead to a hang early
in SPL. Enable the GIC600 initialization variant to mitigate the hang.

Fixes: 37997a214ed1 ("arm: renesas: Use stock lowlevel_init function and remove s_init")
Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>
---
Cc: Nobuhiro Iwamatsu <iwamatsu at nigauri.org>
Cc: Tom Rini <trini at konsulko.com>
Cc: u-boot at lists.denx.de
---
 arch/arm/mach-renesas/Kconfig.rcar4 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/mach-renesas/Kconfig.rcar4 b/arch/arm/mach-renesas/Kconfig.rcar4
index 2439501d07e..39814950b1a 100644
--- a/arch/arm/mach-renesas/Kconfig.rcar4
+++ b/arch/arm/mach-renesas/Kconfig.rcar4
@@ -11,12 +11,14 @@ config R8A779A0
 config R8A779F0
 	bool "Renesas SoC R8A779F0"
 	select GICV3
+	select GICV3_SUPPORT_GIC600
 	imply CLK_R8A779F0
 	imply PINCTRL_PFC_R8A779F0
 
 config R8A779G0
 	bool "Renesas SoC R8A779G0"
 	select GICV3
+	select GICV3_SUPPORT_GIC600
 	select BINMAN
 	select SUPPORT_SPL
 	imply SPL
@@ -33,6 +35,7 @@ config R8A779G0
 config R8A779H0
 	bool "Renesas SoC R8A779H0"
 	select GICV3
+	select GICV3_SUPPORT_GIC600
 	imply CLK_R8A779H0
 	imply PINCTRL_PFC_R8A779H0
 
-- 
2.53.0