Subject: [PATCH v2 01/16] ARM: vexpress: Move vexpress_flags_set() into arch code

From: Rob Herring <[email-masked]>
Date: Wed, 29 Apr 2020 15:58:10 -0500

vexpress_flags_set() is only used by the platform SMP related code and
has nothing to do with the vexpress-sysreg MFD driver other than both
access the same h/w block. It's also only needed for 32-bit systems and
must be built-in for them. Let's move vexpress_flags_set() closer to
where it is being used. This will allow for vexpress-sysreg to be built
as a module.

Cc: Lorenzo Pieralisi <[email-masked]>
Cc: Linus Walleij <[email-masked]>
Cc: Lee Jones <[email-masked]>
Acked-by: Arnd Bergmann <[email-masked]>
Acked-by: Liviu Dudau <[email-masked]>
Reviewed-by: Sudeep Holla <[email-masked]>
Signed-off-by: Rob Herring <[email-masked]>
---
 arch/arm/mach-vexpress/Kconfig |  1 -
 arch/arm/mach-vexpress/core.h  |  1 +
 arch/arm/mach-vexpress/dcscb.c |  1 +
 arch/arm/mach-vexpress/v2m.c   | 23 +++++++++++++++++++++++
 drivers/mfd/vexpress-sysreg.c  | 19 -------------------
 include/linux/vexpress.h       |  4 ----
 6 files changed, 25 insertions(+), 24 deletions(-)

diff --git a/arch/arm/mach-vexpress/Kconfig b/arch/arm/mach-vexpress/Kconfig
index 726a68085c3b..18951cd20d9d 100644
--- a/arch/arm/mach-vexpress/Kconfig
+++ b/arch/arm/mach-vexpress/Kconfig
@@ -22,7 +22,6 @@ menuconfig ARCH_VEXPRESS
 	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,
diff --git a/drivers/mfd/vexpress-sysreg.c b/drivers/mfd/vexpress-sysreg.c
index c68ff56dbdb1..0b9cc67706c7 100644
--- a/drivers/mfd/vexpress-sysreg.c
+++ b/drivers/mfd/vexpress-sysreg.c
@@ -8,7 +8,6 @@
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/mfd/core.h>
-#include <linux/of_address.h>
 #include <linux/of_platform.h>
 #include <linux/platform_data/syscon.h>
 #include <linux/platform_device.h>
@@ -42,24 +41,6 @@
 
 #define SYS_MISC_MASTERSITE	(1 << 14)
 
-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);
-}
-
 /* The sysreg block is just a random collection of various functions... */
 
 static struct syscon_platform_data vexpress_sysreg_sys_id_pdata = {
diff --git a/include/linux/vexpress.h b/include/linux/vexpress.h
index 0e130b5077a5..2ec7992b054c 100644
--- a/include/linux/vexpress.h
+++ b/include/linux/vexpress.h
@@ -40,8 +40,4 @@ struct device *vexpress_config_bridge_register(struct device *parent,
 
 struct regmap *devm_regmap_init_vexpress_config(struct device *dev);
 
-/* Platform control */
-
-void vexpress_flags_set(u32 data);
-
 #endif
-- 
2.20.1

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