Merge tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC driver updates from Arnd Bergmann:
 "These are changes for drivers that are intimately tied to some SoC and
  for some reason could not get merged through the respective subsystem
  maintainer tree.

  Most of the new code is for the Keystone Navigator driver, which is
  new base support that is going to be needed for their hardware
  accelerated network driver and other units.

  Most of the commits are for moving old code around from at91 and omap
  for things that are done in device drivers nowadays.

   - at91: move reset, poweroff, memory and clocksource code into
     drivers directories
   - socfpga: add edac driver (through arm-soc, as requested by Boris)
   - omap: move omap-intc code to drivers/irqchip
   - sunxi: added an RTC driver for sun6i
   - omap: mailbox driver related changes
   - keystone: support for the "Navigator" component
   - versatile: new reboot, led and soc drivers"

* tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (92 commits)
  bus: arm-ccn: Fix spurious warning message
  leds: add device tree bindings for register bit LEDs
  soc: add driver for the ARM RealView
  power: reset: driver for the Versatile syscon reboot
  leds: add a driver for syscon-based LEDs
  drivers/soc: ti: fix build break with modules
  MAINTAINERS: Add Keystone Multicore Navigator drivers entry
  soc: ti: add Keystone Navigator DMA support
  Documentation: dt: soc: add Keystone Navigator DMA bindings
  soc: ti: add Keystone Navigator QMSS driver
  Documentation: dt: soc: add Keystone Navigator QMSS bindings
  rtc: sunxi: Depend on platforms sun4i/sun7i that actually have the rtc
  rtc: sun6i: Add sun6i RTC driver
  irqchip: omap-intc: remove unnecessary comments
  irqchip: omap-intc: correct maximum number or MIR registers
  irqchip: omap-intc: enable TURBO idle mode
  irqchip: omap-intc: enable IP protection
  irqchip: omap-intc: remove unnecesary of_address_to_resource() call
  irqchip: omap-intc: comment style cleanup
  irqchip: omap-intc: minor improvement to omap_irq_pending()
  ...

3 files changed, 155 insertions, 0 deletions

diff --git a/drivers/soc/versatile/Kconfig b/drivers/soc/versatile/Kconfig
new file mode 100644
index 000000000000..bf5ee9c85330
--- /dev/null
+++ b/drivers/soc/versatile/Kconfig
@@ -0,0 +1,10 @@
+#
+# ARM Versatile SoC drivers
+#
+config SOC_REALVIEW
+	bool "SoC bus device for the ARM RealView platforms"
+	depends on ARCH_REALVIEW
+	select SOC_BUS
+	help
+	  Include support for the SoC bus on the ARM RealView platforms
+	  providing some sysfs information about the ASIC variant.
diff --git a/drivers/soc/versatile/Makefile b/drivers/soc/versatile/Makefile
new file mode 100644
index 000000000000..ad547435648e
--- /dev/null
+++ b/drivers/soc/versatile/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_SOC_REALVIEW)	+= soc-realview.o
diff --git a/drivers/soc/versatile/soc-realview.c b/drivers/soc/versatile/soc-realview.c
new file mode 100644
index 000000000000..cea8ea3491d2
--- /dev/null
+++ b/drivers/soc/versatile/soc-realview.c
@@ -0,0 +1,144 @@
+/*
+ * Copyright (C) 2014 Linaro Ltd.
+ *
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+#include <linux/of.h>
+
+/* System ID in syscon */
+#define REALVIEW_SYS_ID_OFFSET 0x00
+
+static const struct of_device_id realview_soc_of_match[] = {
+	{ .compatible = "arm,realview-eb-soc",	},
+	{ .compatible = "arm,realview-pb1176-soc", },
+	{ .compatible = "arm,realview-pb11mp-soc", },
+	{ .compatible = "arm,realview-pba8-soc", },
+	{ .compatible = "arm,realview-pbx-soc", },
+};
+
+static u32 realview_coreid;
+
+static const char *realview_board_str(u32 id)
+{
+	switch ((id >> 16) & 0xfff) {
+	case 0x0147:
+		return "HBI-0147";
+	default:
+		return "Unknown";
+	}
+}
+
+static const char *realview_arch_str(u32 id)
+{
+	switch ((id >> 8) & 0xf) {
+	case 0x05:
+		return "Multi-layer AXI";
+	default:
+		return "Unknown";
+	}
+}
+
+static ssize_t realview_get_manf(struct device *dev,
+			      struct device_attribute *attr,
+			      char *buf)
+{
+	return sprintf(buf, "%02x\n", realview_coreid >> 24);
+}
+
+static struct device_attribute realview_manf_attr =
+	__ATTR(manufacturer,  S_IRUGO, realview_get_manf,  NULL);
+
+static ssize_t realview_get_board(struct device *dev,
+			      struct device_attribute *attr,
+			      char *buf)
+{
+	return sprintf(buf, "%s\n", realview_board_str(realview_coreid));
+}
+
+static struct device_attribute realview_board_attr =
+	__ATTR(board,  S_IRUGO, realview_get_board,  NULL);
+
+static ssize_t realview_get_arch(struct device *dev,
+			      struct device_attribute *attr,
+			      char *buf)
+{
+	return sprintf(buf, "%s\n", realview_arch_str(realview_coreid));
+}
+
+static struct device_attribute realview_arch_attr =
+	__ATTR(fpga,  S_IRUGO, realview_get_arch,  NULL);
+
+static ssize_t realview_get_build(struct device *dev,
+			       struct device_attribute *attr,
+			       char *buf)
+{
+	return sprintf(buf, "%02x\n", (realview_coreid & 0xFF));
+}
+
+static struct device_attribute realview_build_attr =
+	__ATTR(build,  S_IRUGO, realview_get_build,  NULL);
+
+static int realview_soc_probe(struct platform_device *pdev)
+{
+	static struct regmap *syscon_regmap;
+	struct soc_device *soc_dev;
+	struct soc_device_attribute *soc_dev_attr;
+	struct device_node *np = pdev->dev.of_node;
+	int ret;
+
+	syscon_regmap = syscon_regmap_lookup_by_phandle(np, "regmap");
+	if (IS_ERR(syscon_regmap))
+		return PTR_ERR(syscon_regmap);
+
+	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+	if (!soc_dev_attr)
+		return -ENOMEM;
+
+	ret = of_property_read_string(np, "compatible",
+				      &soc_dev_attr->soc_id);
+	if (ret)
+		return -EINVAL;
+
+	soc_dev_attr->machine = "RealView";
+	soc_dev_attr->family = "Versatile";
+	soc_dev = soc_device_register(soc_dev_attr);
+	if (IS_ERR(soc_dev)) {
+		kfree(soc_dev_attr);
+		return -ENODEV;
+	}
+	ret = regmap_read(syscon_regmap, REALVIEW_SYS_ID_OFFSET,
+			  &realview_coreid);
+	if (ret)
+		return -ENODEV;
+
+	device_create_file(soc_device_to_device(soc_dev), &realview_manf_attr);
+	device_create_file(soc_device_to_device(soc_dev), &realview_board_attr);
+	device_create_file(soc_device_to_device(soc_dev), &realview_arch_attr);
+	device_create_file(soc_device_to_device(soc_dev), &realview_build_attr);
+
+	dev_info(&pdev->dev, "RealView Syscon Core ID: 0x%08x\n",
+		 realview_coreid);
+	/* FIXME: add attributes for SoC to sysfs */
+	return 0;
+}
+
+static struct platform_driver realview_soc_driver = {
+	.probe = realview_soc_probe,
+	.driver = {
+		.name = "realview-soc",
+		.of_match_table = realview_soc_of_match,
+	},
+};
+module_platform_driver(realview_soc_driver);