vexpress: Move setting master site to vexpress-config bus

There's only a single caller of vexpress_config_set_master() from
vexpress-sysreg.c. Let's just make the registers needed available to
vexpress-config and move all the code there. The registers needed aren't
used anywhere else either. With this, we can get rid of the private API
between these 2 drivers.

Cc: Lorenzo Pieralisi <[e-mail]>
Cc: Linus Walleij <[e-mail]>
Cc: Greg Kroah-Hartman <[e-mail]>
Acked-by: Liviu Dudau <[e-mail]>
Acked-by: Sudeep Holla <[e-mail]>
Acked-by: Lee Jones <[e-mail]>
Signed-off-by: Rob Herring <[e-mail]>

drivers/bus/vexpress-config.c

···
 #include <linux/slab.h>
 #include <linux/vexpress.h>
 
-#define SYS_CFGDATA		0x0
+#define SYS_MISC		0x0
+#define SYS_MISC_MASTERSITE	(1 << 14)
 
-#define SYS_CFGCTRL		0x4
+#define SYS_PROCID0		0x24
+#define SYS_PROCID1		0x28
+#define SYS_HBI_MASK		0xfff
+#define SYS_PROCIDx_HBI_SHIFT	0
+
+#define SYS_CFGDATA		0x40
+
+#define SYS_CFGCTRL		0x44
 #define SYS_CFGCTRL_START	(1 << 31)
 #define SYS_CFGCTRL_WRITE	(1 << 30)
 #define SYS_CFGCTRL_DCC(n)	(((n) & 0xf) << 26)
···
 #define SYS_CFGCTRL_POSITION(n)	(((n) & 0xf) << 12)
 #define SYS_CFGCTRL_DEVICE(n)	(((n) & 0xfff) << 0)
 
-#define SYS_CFGSTAT		0x8
+#define SYS_CFGSTAT		0x48
 #define SYS_CFGSTAT_ERR		(1 << 1)
 #define SYS_CFGSTAT_COMPLETE	(1 << 0)
 
+#define VEXPRESS_SITE_MB		0
+#define VEXPRESS_SITE_DB1		1
+#define VEXPRESS_SITE_DB2		2
+#define VEXPRESS_SITE_MASTER		0xf
 
 struct vexpress_syscfg {
 	struct device *dev;
···
 static u32 vexpress_config_site_master = VEXPRESS_SITE_MASTER;
 
 
-void vexpress_config_set_master(u32 site)
+static void vexpress_config_set_master(u32 site)
 {
 	vexpress_config_site_master = site;
 }
···
 	struct resource *res;
 	struct vexpress_config_bridge *bridge;
 	struct device_node *node;
+	int master;
+	u32 dt_hbi;
 
 	syscfg = devm_kzalloc(&pdev->dev, sizeof(*syscfg), GFP_KERNEL);
 	if (!syscfg)
···
 	bridge->context = syscfg;
 
 	dev_set_drvdata(&pdev->dev, bridge);
+
+	master = readl(syscfg->base + SYS_MISC) & SYS_MISC_MASTERSITE ?
+			VEXPRESS_SITE_DB2 : VEXPRESS_SITE_DB1;
+	vexpress_config_set_master(master);
+
+	/* Confirm board type against DT property, if available */
+	if (of_property_read_u32(of_root, "arm,hbi", &dt_hbi) == 0) {
+		u32 id = readl(syscfg->base + (master == VEXPRESS_SITE_DB1 ?
+				 SYS_PROCID0 : SYS_PROCID1));
+		u32 hbi = (id >> SYS_PROCIDx_HBI_SHIFT) & SYS_HBI_MASK;
+
+		if (WARN_ON(dt_hbi != hbi))
+			dev_warn(&pdev->dev, "DT HBI (%x) is not matching hardware (%x)!\n",
+					dt_hbi, hbi);
+	}
 
 	for_each_compatible_node(node, NULL, "arm,vexpress,config-bus") {
 		struct device_node *bridge_np;

drivers/mfd/vexpress-sysreg.c

···
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/stat.h>
-#include <linux/vexpress.h>
 
 #define SYS_ID			0x000
 #define SYS_SW			0x004
···
 #define SYS_CFGDATA		0x0a0
 #define SYS_CFGCTRL		0x0a4
 #define SYS_CFGSTAT		0x0a8
-
-#define SYS_HBI_MASK		0xfff
-#define SYS_PROCIDx_HBI_SHIFT	0
-
-#define SYS_MISC_MASTERSITE	(1 << 14)
 
 /* The sysreg block is just a random collection of various functions... */
 
···
 		.name = "vexpress-syscfg",
 		.num_resources = 1,
 		.resources = (struct resource []) {
-			DEFINE_RES_MEM(SYS_CFGDATA, 0xc),
+			DEFINE_RES_MEM(SYS_MISC, 0x4c),
 		},
 	}
 };
···
 	struct resource *mem;
 	void __iomem *base;
 	struct gpio_chip *mmc_gpio_chip;
-	int master;
-	u32 dt_hbi;
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!mem)
···
 	base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
 	if (!base)
 		return -ENOMEM;
-
-	master = readl(base + SYS_MISC) & SYS_MISC_MASTERSITE ?
-			VEXPRESS_SITE_DB2 : VEXPRESS_SITE_DB1;
-	vexpress_config_set_master(master);
-
-	/* Confirm board type against DT property, if available */
-	if (of_property_read_u32(of_root, "arm,hbi", &dt_hbi) == 0) {
-		u32 id = readl(base + (master == VEXPRESS_SITE_DB1 ?
-				 SYS_PROCID0 : SYS_PROCID1));
-		u32 hbi = (id >> SYS_PROCIDx_HBI_SHIFT) & SYS_HBI_MASK;
-
-		if (WARN_ON(dt_hbi != hbi))
-			dev_warn(&pdev->dev, "DT HBI (%x) is not matching hardware (%x)!\n",
-					dt_hbi, hbi);
-	}
 
 	/*
 	 * Duplicated SYS_MCI pseudo-GPIO controller for compatibility with

include/linux/vexpress.h

···
 #include <linux/device.h>
 #include <linux/regmap.h>
 
-#define VEXPRESS_SITE_MB		0
-#define VEXPRESS_SITE_DB1		1
-#define VEXPRESS_SITE_DB2		2
-#define VEXPRESS_SITE_MASTER		0xf
-
-/* Config infrastructure */
-
-void vexpress_config_set_master(u32 site);
-
 /* Config regmap API */
 
 struct regmap *devm_regmap_init_vexpress_config(struct device *dev);