Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm / mach-imx / iomux-v3.c

diff --git a/kernel/arch/arm/mach-imx/iomux-v3.c b/kernel/arch/arm/mach-imx/iomux-v3.c
new file mode 100644 (file)
index 0000000..a53b2e6
--- /dev/null
+++ b/kernel/arch/arm/mach-imx/iomux-v3.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2004-2006 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
+ * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
+ *                       <armlinux@phytec.de>
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/gpio.h>
+
+#include <asm/mach/map.h>
+
+#include "hardware.h"
+#include "iomux-v3.h"
+
+static void __iomem *base;
+
+/*
+ * configures a single pad in the iomuxer
+ */
+int mxc_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
+{
+       u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT;
+       u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
+       u32 sel_input_ofs = (pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT;
+       u32 sel_input = (pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT;
+       u32 pad_ctrl_ofs = (pad & MUX_PAD_CTRL_OFS_MASK) >> MUX_PAD_CTRL_OFS_SHIFT;
+       u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;
+
+       if (mux_ctrl_ofs)
+               __raw_writel(mux_mode, base + mux_ctrl_ofs);
+
+       if (sel_input_ofs)
+               __raw_writel(sel_input, base + sel_input_ofs);
+
+       if (!(pad_ctrl & NO_PAD_CTRL) && pad_ctrl_ofs)
+               __raw_writel(pad_ctrl, base + pad_ctrl_ofs);
+
+       return 0;
+}
+
+int mxc_iomux_v3_setup_multiple_pads(const iomux_v3_cfg_t *pad_list,
+               unsigned count)
+{
+       const iomux_v3_cfg_t *p = pad_list;
+       int i;
+       int ret;
+
+       for (i = 0; i < count; i++) {
+               ret = mxc_iomux_v3_setup_pad(*p);
+               if (ret)
+                       return ret;
+               p++;
+       }
+       return 0;
+}
+
+void mxc_iomux_v3_init(void __iomem *iomux_v3_base)
+{
+       base = iomux_v3_base;
+}