linux-kernel - [PATCH v2 1/1] x86/platform/intel-mid: Add pinctrl for Intel Merrifield

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Message-Id: <1467226894-107109-1-git-send-email-andriy.shevchenko@linux.intel.com>
Date:	Wed, 29 Jun 2016 22:01:34 +0300
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H . Peter Anvin" <hpa@...or.com>, x86@...nel.org
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v2 1/1] 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@...ux.intel.com>
---
In v2:
- add missed header (asm/intel-mid.h)
 arch/x86/platform/intel-mid/device_libs/Makefile   |  2 +
 .../intel-mid/device_libs/platform_mrfld_pinctrl.c | 43 ++++++++++++++++++++++
 2 files changed, 45 insertions(+)
 create mode 100644 arch/x86/platform/intel-mid/device_libs/platform_mrfld_pinctrl.c

diff --git a/arch/x86/platform/intel-mid/device_libs/Makefile b/arch/x86/platform/intel-mid/device_libs/Makefile
index 744638f..ff1d911 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 0000000..83f3d97
--- /dev/null
+++ b/arch/x86/platform/intel-mid/device_libs/platform_mrfld_pinctrl.c
@@ -0,0 +1,43 @@
+/*
+ * Intel Merrifield FLIS platform device initilization file
+ *
+ * Copyright (C) 2016, Intel Corporation
+ *
+ * Author: Andy Shevchenko <andriy.shevchenko@...ux.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);
-- 
2.8.1