Merge tag 'vexpress-modules-for-soc-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux into arm/soc

VExpress modularization

This series enables building various Versatile Express platform drivers
as modules. The primary target is the Fast Model FVP which is supported
in Android. As Android is moving towards their GKI, or generic kernel,
the hardware support has to be in modules. Currently ARCH_VEXPRESS
enables several built-in only drivers. Some of these are needed, but
some are only needed for older 32-bit VExpress platforms and can just
be disabled.

* tag 'vexpress-modules-for-soc-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  ARM: vexpress: Don't select VEXPRESS_CONFIG
  bus: vexpress-config: Support building as module
  vexpress: Move setting master site to vexpress-config bus
  bus: vexpress-config: simplify config bus probing
  bus: vexpress-config: Merge vexpress-syscfg into vexpress-config
  mfd: vexpress-sysreg: Support building as a module
  mfd: vexpress-sysreg: Use devres API variants
  mfd: vexpress-sysreg: Drop unused syscon child devices
  mfd: vexpress-sysreg: Drop selecting CONFIG_CLKSRC_MMIO
  clk: vexpress-osc: Support building as a module
  clk: vexpress-osc: Use the devres clock API variants
  clk: versatile: Only enable SP810 on 32-bit by default
  clk: versatile: Rework kconfig structure
  amba: Retry adding deferred devices at late_initcall
  arm64: vexpress: Don't select CONFIG_POWER_RESET_VEXPRESS
  ARM: vexpress: Move vexpress_flags_set() into arch code

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

7 files changed, 25 insertions, 7 deletions

diff --git a/arch/arm/mach-integrator/Kconfig b/arch/arm/mach-integrator/Kconfig
index 106670c37c94..7a9808b01763 100644
--- a/arch/arm/mach-integrator/Kconfig
+++ b/arch/arm/mach-integrator/Kconfig
@@ -3,7 +3,6 @@ menuconfig ARCH_INTEGRATOR
 	bool "ARM Ltd. Integrator family"
 	depends on ARCH_MULTI_V4T || ARCH_MULTI_V5 || ARCH_MULTI_V6
 	select ARM_AMBA
-	select COMMON_CLK_VERSATILE
 	select CMA
 	select DMA_CMA
 	select HAVE_TCM
diff --git a/arch/arm/mach-realview/Kconfig b/arch/arm/mach-realview/Kconfig
index 0bed0d3ab364..5c6031b144c8 100644
--- a/arch/arm/mach-realview/Kconfig
+++ b/arch/arm/mach-realview/Kconfig
@@ -6,7 +6,6 @@ menuconfig ARCH_REALVIEW
 	select ARM_GIC
 	select ARM_TIMER_SP804
 	select CLK_SP810
-	select COMMON_CLK_VERSATILE
 	select GPIO_PL061 if GPIOLIB
 	select HAVE_ARM_SCU if SMP
 	select HAVE_ARM_TWD if SMP
diff --git a/arch/arm/mach-versatile/Kconfig b/arch/arm/mach-versatile/Kconfig
index f5c275434d6c..d88e7725bf99 100644
--- a/arch/arm/mach-versatile/Kconfig
+++ b/arch/arm/mach-versatile/Kconfig
@@ -6,7 +6,6 @@ config ARCH_VERSATILE
 	select ARM_TIMER_SP804
 	select ARM_VIC
 	select CLKSRC_VERSATILE
-	select COMMON_CLK_VERSATILE
 	select CPU_ARM926T
 	select ICST
 	select MFD_SYSCON
diff --git a/arch/arm/mach-vexpress/Kconfig b/arch/arm/mach-vexpress/Kconfig
index 726a68085c3b..8391a5b3cd78 100644
--- a/arch/arm/mach-vexpress/Kconfig
+++ b/arch/arm/mach-vexpress/Kconfig
@@ -7,7 +7,6 @@ menuconfig ARCH_VEXPRESS
 	select ARM_GIC
 	select ARM_GLOBAL_TIMER
 	select ARM_TIMER_SP804
-	select COMMON_CLK_VERSATILE
 	select GPIOLIB
 	select HAVE_ARM_SCU if SMP
 	select HAVE_ARM_TWD if SMP
@@ -20,9 +19,6 @@ menuconfig ARCH_VEXPRESS
 	select POWER_SUPPLY
 	select REGULATOR if MMC_ARMMMCI
 	select REGULATOR_FIXED_VOLTAGE if REGULATOR
-	select VEXPRESS_CONFIG
-	select VEXPRESS_SYSCFG
-	select MFD_VEXPRESS_SYSREG
 	help
 	  This option enables support for systems using Cortex processor based
 	  ARM core and logic (FPGA) tiles on the Versatile Express motherboard,
diff --git a/arch/arm/mach-vexpress/core.h b/arch/arm/mach-vexpress/core.h
index f4a7519084f1..bda78675c55d 100644
--- a/arch/arm/mach-vexpress/core.h
+++ b/arch/arm/mach-vexpress/core.h
@@ -1,3 +1,4 @@
 bool vexpress_smp_init_ops(void);
+void vexpress_flags_set(u32 data);
 
 extern const struct smp_operations vexpress_smp_dt_ops;
diff --git a/arch/arm/mach-vexpress/dcscb.c b/arch/arm/mach-vexpress/dcscb.c
index 46a903c88c6a..a0554d7d04f7 100644
--- a/arch/arm/mach-vexpress/dcscb.c
+++ b/arch/arm/mach-vexpress/dcscb.c
@@ -20,6 +20,7 @@
 #include <asm/cputype.h>
 #include <asm/cp15.h>
 
+#include "core.h"
 
 #define RST_HOLD0	0x0
 #define RST_HOLD1	0x4
diff --git a/arch/arm/mach-vexpress/v2m.c b/arch/arm/mach-vexpress/v2m.c
index 95886b3bb9dd..ffe7c7a85ae9 100644
--- a/arch/arm/mach-vexpress/v2m.c
+++ b/arch/arm/mach-vexpress/v2m.c
@@ -1,8 +1,31 @@
 // SPDX-License-Identifier: GPL-2.0
+#include <linux/of.h>
+#include <linux/of_address.h>
 #include <asm/mach/arch.h>
 
 #include "core.h"
 
+#define SYS_FLAGSSET		0x030
+#define SYS_FLAGSCLR		0x034
+
+void vexpress_flags_set(u32 data)
+{
+	static void __iomem *base;
+
+	if (!base) {
+		struct device_node *node = of_find_compatible_node(NULL, NULL,
+				"arm,vexpress-sysreg");
+
+		base = of_iomap(node, 0);
+	}
+
+	if (WARN_ON(!base))
+		return;
+
+	writel(~0, base + SYS_FLAGSCLR);
+	writel(data, base + SYS_FLAGSSET);
+}
+
 static const char * const v2m_dt_match[] __initconst = {
 	"arm,vexpress",
 	NULL,