Merge tag 'arm-soc/for-4.7/drivers' of http://github.com/Broadcom/stblinux into next/drivers

Merge "Broadcom ARM-based SoCs drivers changes" from Florian Fainelli:

- Justin adds a soc_dev driver to properly report to user-space the Broadcom
  STB SoC family, product and revision

- Florian reworks how the brcmstb_gisb driver dependency is done to enable it
  on Broadcom STB MIPS-based SoCs and remove a select in
  arch/arm/mach-bcm/Kconfig

* tag 'arm-soc/for-4.7/drivers' of http://github.com/Broadcom/stblinux:
  bus: brcmstb_gisb: Rework dependencies
  soc: brcmstb: add SoC driver to brcmstb

3 files changed, 60 insertions, 1 deletions

diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index 7ef121472cdd..68ab6412392a 100644
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -173,12 +173,12 @@ config ARCH_BRCMSTB
 	select ARM_GIC
 	select ARM_ERRATA_798181 if SMP
 	select HAVE_ARM_ARCH_TIMER
-	select BRCMSTB_GISB_ARB
 	select BRCMSTB_L2_IRQ
 	select BCM7120_L2_IRQ
 	select ARCH_DMA_ADDR_T_64BIT if ARM_LPAE
 	select ARCH_WANT_OPTIONAL_GPIOLIB
 	select SOC_BRCMSTB
+	select SOC_BUS
 	help
 	  Say Y if you intend to run the kernel on a Broadcom ARM-based STB
 	  chipset.
diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig
index 67cebd3d7f2d..f5ea153f53e9 100644
--- a/drivers/bus/Kconfig
+++ b/drivers/bus/Kconfig
@@ -58,6 +58,7 @@ config ARM_CCN
 config BRCMSTB_GISB_ARB
 	bool "Broadcom STB GISB bus arbiter"
 	depends on ARM || MIPS
+	default ARCH_BRCMSTB || BMIPS_GENERIC
 	help
 	  Driver for the Broadcom Set Top Box System-on-a-chip internal bus
 	  arbiter. This driver provides timeout and target abort error handling
diff --git a/drivers/soc/brcmstb/common.c b/drivers/soc/brcmstb/common.c
index c262c029b1b8..daf86acf9d01 100644
--- a/drivers/soc/brcmstb/common.c
+++ b/drivers/soc/brcmstb/common.c
@@ -12,10 +12,18 @@
  * GNU General Public License for more details.
  */
 
+#include <linux/io.h>
 #include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include <linux/soc/brcmstb/brcmstb.h>
+#include <linux/sys_soc.h>
 
 #include <soc/brcmstb/common.h>
 
+static u32 family_id;
+static u32 product_id;
+
 static const struct of_device_id brcmstb_machine_match[] = {
 	{ .compatible = "brcm,brcmstb", },
 	{ }
@@ -31,3 +39,53 @@ bool soc_is_brcmstb(void)
 
 	return of_match_node(brcmstb_machine_match, root) != NULL;
 }
+
+static const struct of_device_id sun_top_ctrl_match[] = {
+	{ .compatible = "brcm,brcmstb-sun-top-ctrl", },
+	{ }
+};
+
+static int __init brcmstb_soc_device_init(void)
+{
+	struct soc_device_attribute *soc_dev_attr;
+	struct soc_device *soc_dev;
+	struct device_node *sun_top_ctrl;
+	void __iomem *sun_top_ctrl_base;
+
+	sun_top_ctrl = of_find_matching_node(NULL, sun_top_ctrl_match);
+	if (!sun_top_ctrl)
+		return -ENODEV;
+
+	sun_top_ctrl_base = of_iomap(sun_top_ctrl, 0);
+	if (!sun_top_ctrl_base)
+		return -ENODEV;
+
+	family_id = readl(sun_top_ctrl_base);
+	product_id = readl(sun_top_ctrl_base + 0x4);
+
+	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+	if (!soc_dev_attr)
+		return -ENOMEM;
+
+	soc_dev_attr->family = kasprintf(GFP_KERNEL, "%x",
+					 family_id >> 28 ?
+					 family_id >> 16 : family_id >> 8);
+	soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%x",
+					 product_id >> 28 ?
+					 product_id >> 16 : product_id >> 8);
+	soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c%d",
+					 ((product_id & 0xf0) >> 4) + 'A',
+					   product_id & 0xf);
+
+	soc_dev = soc_device_register(soc_dev_attr);
+	if (IS_ERR(soc_dev)) {
+		kfree(soc_dev_attr->family);
+		kfree(soc_dev_attr->soc_id);
+		kfree(soc_dev_attr->revision);
+		kfree(soc_dev_attr);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+arch_initcall(brcmstb_soc_device_init);