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authorRob Herring <robh@kernel.org>2020-04-29 23:58:23 +0300
committerRob Herring <robh@kernel.org>2020-05-13 20:42:46 +0300
commit310f80d61717425fbf799ef0ff0926e64cd57d9c (patch)
tree965616393ac7ab8bb40e721ffcdb0df4ce0b04ae /drivers/bus/vexpress-config.c
parenta5a38765ac79b27d53e45a283418e75c0b57c1bb (diff)
downloadlinux-310f80d61717425fbf799ef0ff0926e64cd57d9c.tar.xz
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 <lorenzo.pieralisi@arm.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Liviu Dudau <liviu.dudau@arm.com> Acked-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/bus/vexpress-config.c')
-rw-r--r--drivers/bus/vexpress-config.c37
1 files changed, 33 insertions, 4 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;