x86/platform/intel-mid: Add pinctrl for Intel Merrifield

Intel Merrifield uses a special address space reserved for Family-Level
Interface Shim (FLIS) that allows consumers to mux and configure pins.

Create a platform device for it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1467226894-107109-1-git-send-email-andriy.shevchenko@linux.intel.com
[ Fixed typo. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2 files changed, 45 insertions, 0 deletions

diff --git a/arch/x86/platform/intel-mid/device_libs/Makefile b/arch/x86/platform/intel-mid/device_libs/Makefile
index abe8ba87c970..79e97ed5be5b 100644
--- a/arch/x86/platform/intel-mid/device_libs/Makefile
+++ b/arch/x86/platform/intel-mid/device_libs/Makefile
@@ -1,3 +1,5 @@
+# Family-Level Interface Shim (FLIS)
+obj-$(subst m,y,$(CONFIG_PINCTRL_MERRIFIELD)) += platform_mrfld_pinctrl.o
 # IPC Devices
 obj-y += platform_ipc.o
 obj-$(subst m,y,$(CONFIG_MFD_INTEL_MSIC)) += platform_msic.o
diff --git a/arch/x86/platform/intel-mid/device_libs/platform_mrfld_pinctrl.c b/arch/x86/platform/intel-mid/device_libs/platform_mrfld_pinctrl.c
new file mode 100644
index 000000000000..4de8a664e6a1
--- /dev/null
+++ b/arch/x86/platform/intel-mid/device_libs/platform_mrfld_pinctrl.c
@@ -0,0 +1,43 @@
+/*
+ * Intel Merrifield FLIS platform device initialization file
+ *
+ * Copyright (C) 2016, Intel Corporation
+ *
+ * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+
+#include <asm/intel-mid.h>
+
+#define FLIS_BASE_ADDR                  0xff0c0000
+#define FLIS_LENGTH                     0x8000
+
+static struct resource mrfld_pinctrl_mmio_resource = {
+        .start          = FLIS_BASE_ADDR,
+        .end            = FLIS_BASE_ADDR + FLIS_LENGTH - 1,
+        .flags          = IORESOURCE_MEM,
+};
+
+static struct platform_device mrfld_pinctrl_device = {
+        .name           = "pinctrl-merrifield",
+        .id             = PLATFORM_DEVID_NONE,
+        .resource       = &mrfld_pinctrl_mmio_resource,
+        .num_resources  = 1,
+};
+
+static int __init mrfld_pinctrl_init(void)
+{
+        if (intel_mid_identify_cpu() == INTEL_MID_CPU_CHIP_TANGIER)
+                return platform_device_register(&mrfld_pinctrl_device);
+
+        return -ENODEV;
+}
+arch_initcall(mrfld_pinctrl_init);