Subject: [PATCH v2 14/16] vexpress: Move setting master site to vexpress-config bus

From: Rob Herring <[email-masked]>
Date: Wed, 29 Apr 2020 15:58:23 -0500

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: Sudeep Holla <[email-masked]>
Cc: Lorenzo Pieralisi <[email-masked]>
Cc: Linus Walleij <[email-masked]>
Cc: Lee Jones <[email-masked]>
Cc: Greg Kroah-Hartman <[email-masked]>
Acked-by: Liviu Dudau <[email-masked]>
Signed-off-by: Rob Herring <[email-masked]>
---
v2:
  - Reword subject
---
 drivers/bus/vexpress-config.c | 37 +++++++++++++++++++++++++++++++----
 drivers/mfd/vexpress-sysreg.c | 25 +----------------------
 include/linux/vexpress.h      |  9 ---------
 3 files changed, 34 insertions(+), 37 deletions(-)

diff --git a/drivers/bus/vexpress-config.c b/drivers/bus/vexpress-config.c
index 43deb4df140b..caa35a4cb34d 100644
--- a/drivers/bus/vexpress-config.c
+++ b/drivers/bus/vexpress-config.c
@@ -14,9 +14,17 @@
 #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)
@@ -25,10 +33,14 @@
 #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;
@@ -59,7 +71,7 @@ static DEFINE_MUTEX(vexpress_config_mutex);
 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;
 }
@@ -340,6 +352,8 @@ static int vexpress_syscfg_probe(struct platform_device *pdev)
 	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)
@@ -361,6 +375,21 @@ static int vexpress_syscfg_probe(struct platform_device *pdev)
 
 	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;
 
diff --git a/drivers/mfd/vexpress-sysreg.c b/drivers/mfd/vexpress-sysreg.c
index eeeeb1d26d5d..aaf24af287dd 100644
--- a/drivers/mfd/vexpress-sysreg.c
+++ b/drivers/mfd/vexpress-sysreg.c
@@ -14,7 +14,6 @@
 #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
@@ -37,11 +36,6 @@
 #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... */
 
 static struct bgpio_pdata vexpress_sysreg_sys_led_pdata = {
@@ -94,7 +88,7 @@ static struct mfd_cell vexpress_sysreg_cells[] = {
 		.name = "vexpress-syscfg",
 		.num_resources = 1,
 		.resources = (struct resource []) {
-			DEFINE_RES_MEM(SYS_CFGDATA, 0xc),
+			DEFINE_RES_MEM(SYS_MISC, 0x4c),
 		},
 	}
 };
@@ -104,8 +98,6 @@ static int vexpress_sysreg_probe(struct platform_device *pdev)
 	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)
@@ -115,21 +107,6 @@ static int vexpress_sysreg_probe(struct platform_device *pdev)
 	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
 	 * older trees using sysreg node for MMC control lines.
diff --git a/include/linux/vexpress.h b/include/linux/vexpress.h
index 65096c792d57..2f9dd072f11f 100644
--- a/include/linux/vexpress.h
+++ b/include/linux/vexpress.h
@@ -10,15 +10,6 @@
 #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);
-- 
2.20.1

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