pinctrl: move imx-iomux-v2 to drivers/pinctrl/

For consistency reasons.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 158 insertions, 0 deletions

diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 6ce01bffe8..6b73d7b256 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -9,6 +9,11 @@ config PINCTRL
 	  from the devicetree. Legacy drivers here may not need this core
 	  support but instead provide their own SoC specific APIs
 
+config PINCTRL_IMX_IOMUX_V2
+	bool "i.MX iomux v2"
+	help
+	  This iomux controller is found on i.MX31.
+
 config PINCTRL_IMX_IOMUX_V3
 	select PINCTRL if OFDEVICE
 	bool "i.MX iomux v3"
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 134c889c99..b03a20f663 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -1,2 +1,3 @@
 obj-$(CONFIG_PINCTRL)	+= pinctrl.o
+obj-$(CONFIG_PINCTRL_IMX_IOMUX_V2) += imx-iomux-v2.o
 obj-$(CONFIG_PINCTRL_IMX_IOMUX_V3) += imx-iomux-v3.o
diff --git a/drivers/pinctrl/imx-iomux-v2.c b/drivers/pinctrl/imx-iomux-v2.c
new file mode 100644
index 0000000000..cef0340909
--- /dev/null
+++ b/drivers/pinctrl/imx-iomux-v2.c
@@ -0,0 +1,152 @@
+/*
+ *  (C) 2007, Sascha Hauer <sha@pengutronix.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.
+ *
+ *
+ */
+
+#include <common.h>
+#include <io.h>
+#include <init.h>
+#include <mach/iomux-mx31.h>
+
+/*
+ * IOMUX register (base) addresses
+ */
+#define IOMUXINT_OBS1	0x000
+#define IOMUXINT_OBS2	0x004
+#define IOMUXGPR	0x008
+#define IOMUXSW_MUX_CTL	0x00C
+#define IOMUXSW_PAD_CTL	0x154
+
+#define IOMUX_REG_MASK (IOMUX_PADNUM_MASK & ~0x3)
+
+static void __iomem *base;
+
+/*
+ * set the mode for a IOMUX pin.
+ */
+int imx_iomux_mode(unsigned int pin_mode)
+{
+	u32 field, l, mode, ret = 0;
+	void __iomem *reg;
+
+	if (!base)
+		return -EINVAL;
+
+	reg = base + IOMUXSW_MUX_CTL + (pin_mode & IOMUX_REG_MASK);
+	field = pin_mode & 0x3;
+	mode = (pin_mode & IOMUX_MODE_MASK) >> IOMUX_MODE_SHIFT;
+
+	pr_debug("%s: reg offset = 0x%x field = %d mode = 0x%02x\n",
+			__func__, (pin_mode & IOMUX_REG_MASK), field, mode);
+
+	l = readl(reg);
+	l &= ~(0xff << (field * 8));
+	l |= mode << (field * 8);
+	writel(l, reg);
+
+	return ret;
+}
+EXPORT_SYMBOL(mxc_iomux_mode);
+
+/*
+ * This function configures the pad value for a IOMUX pin.
+ */
+void imx_iomux_set_pad(enum iomux_pins pin, u32 config)
+{
+	u32 field, l;
+	void __iomem *reg;
+
+	if (!base)
+		return;
+
+	pin &= IOMUX_PADNUM_MASK;
+	reg = base + IOMUXSW_PAD_CTL + (pin + 2) / 3 * 4;
+	field = (pin + 2) % 3;
+
+	pr_debug("%s: reg offset = 0x%x, field = %d\n",
+			__func__, (pin + 2) / 3, field);
+
+	l = readl(reg);
+	l &= ~(0x1ff << (field * 10));
+	l |= config << (field * 10);
+	writel(l, reg);
+}
+EXPORT_SYMBOL(mxc_iomux_set_pad);
+
+/*
+ * This function enables/disables the general purpose function for a particular
+ * signal.
+ */
+void imx_iomux_set_gpr(enum iomux_gp_func gp, bool en)
+{
+	u32 l;
+
+	if (!base)
+		return;
+
+	l = readl(base + IOMUXGPR);
+	if (en)
+		l |= gp;
+	else
+		l &= ~gp;
+
+	writel(l, base + IOMUXGPR);
+}
+EXPORT_SYMBOL(mxc_iomux_set_gpr);
+
+int imx_iomux_setup_multiple_pins(const unsigned int *pin_list, unsigned count)
+{
+	int i;
+
+	for (i = 0; i < count; i++)
+		imx_iomux_mode(pin_list[i]);
+
+	return 0;
+}
+
+static int imx_iomux_probe(struct device_d *dev)
+{
+	base = dev_request_mem_region(dev, 0);
+
+	return 0;
+}
+
+static __maybe_unused struct of_device_id imx_iomux_dt_ids[] = {
+	{
+		.compatible = "fsl,imx31-iomux",
+	}, {
+		/* sentinel */
+	}
+};
+
+static struct platform_device_id imx_iomux_ids[] = {
+	{
+		.name = "imx31-iomux",
+	}, {
+		/* sentinel */
+	},
+};
+
+static struct driver_d imx_iomux_driver = {
+	.name = "imx-iomuxv2",
+	.probe = imx_iomux_probe,
+	.of_compatible = DRV_OF_COMPAT(imx_iomux_dt_ids),
+	.id_table = imx_iomux_ids,
+};
+
+static int imx_iomux_init(void)
+{
+	return platform_driver_register(&imx_iomux_driver);
+}
+postcore_initcall(imx_iomux_init);