From 88dacbcd946d2e0cd06337ab3f393064ab6aba82 Mon Sep 17 00:00:00 2001
From: Stefan Wahren <wahrenst@gmx.net>
Date: Fri, 27 Dec 2019 11:40:56 +0100
Subject: [PATCH] ARM: bcm: Backport BCM2711 support from upstream

Make the BCM2711 a different machine, but keep it in board_bcm2835.

Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
---
 arch/arm/mach-bcm/Kconfig         |  4 ++--
 arch/arm/mach-bcm/board_bcm2835.c | 17 +++++++++++++++--
 arch/arm64/Kconfig.platforms      |  5 +++--
 3 files changed, 20 insertions(+), 6 deletions(-)

--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -161,7 +161,7 @@ config ARCH_BCM2835
 	select GPIOLIB
 	select ARM_AMBA
 	select ARM_ERRATA_411920 if ARCH_MULTI_V6
-	select ARM_GIC
+	select ARM_GIC if ARCH_MULTI_V7
 	select ARM_TIMER_SP804
 	select HAVE_ARM_ARCH_TIMER if ARCH_MULTI_V7
 	select TIMER_OF
@@ -175,7 +175,7 @@ config ARCH_BCM2835
 	select ZONE_DMA if ARM_LPAE
 	select MFD_CORE
 	help
-	  This enables support for the Broadcom BCM2835 and BCM2836 SoCs.
+	  This enables support for the Broadcom BCM2711 and BCM283x SoCs.
 	  This SoC is used in the Raspberry Pi and Roku 2 devices.
 
 config ARCH_BCM_53573
--- a/arch/arm/mach-bcm/board_bcm2835.c
+++ b/arch/arm/mach-bcm/board_bcm2835.c
@@ -109,17 +109,30 @@ static const char * const bcm2835_compat
 #ifdef CONFIG_ARCH_MULTI_V7
 	"brcm,bcm2836",
 	"brcm,bcm2837",
-	"brcm,bcm2711",
 #endif
 	NULL
 };
 
 DT_MACHINE_START(BCM2835, "BCM2835")
+	.map_io = bcm2835_map_io,
+	.init_machine = bcm2835_init,
+	.dt_compat = bcm2835_compat,
+	.smp = smp_ops(bcm2836_smp_ops),
+MACHINE_END
+
+static const char * const bcm2711_compat[] = {
+#ifdef CONFIG_ARCH_MULTI_V7
+	"brcm,bcm2711",
+#endif
+	NULL
+};
+
+DT_MACHINE_START(BCM2711, "BCM2711")
 #if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
 	.dma_zone_size	= SZ_1G,
 #endif
 	.map_io = bcm2835_map_io,
 	.init_machine = bcm2835_init,
-	.dt_compat = bcm2835_compat,
+	.dt_compat = bcm2711_compat,
 	.smp = smp_ops(bcm2836_smp_ops),
 MACHINE_END
--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms
@@ -37,11 +37,12 @@ config ARCH_BCM2835
 	select PINCTRL
 	select PINCTRL_BCM2835
 	select ARM_AMBA
+	select ARM_GIC
 	select ARM_TIMER_SP804
 	select HAVE_ARM_ARCH_TIMER
 	help
-	  This enables support for the Broadcom BCM2837 SoC.
-	  This SoC is used in the Raspberry Pi 3 device.
+	  This enables support for the Broadcom BCM2837 and BCM2711 SoC.
+	  These SoCs are used in the Raspberry Pi 3 and 4 devices.
 
 config ARCH_BCM_IPROC
 	bool "Broadcom iProc SoC Family"