pinctrl: add a driver for NVIDIA Tegra

This adds a driver for the Tegra pinmux, and required parameterization
data for Tegra20 and Tegra30.

The driver is initially added with driver name and device tree compatible
value that won't cause this driver to be used. A later change will switch
the pinctrl driver to use the correct values, switch the old pinmux
driver to be disabled, and update all code that uses the old pinmux APIs
to use the new pinctrl APIs.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Olof Johansson <olof@lixom.net>
[squashed "fix case of Tegra30's foo_groups[] arrays"]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/mach-tegra/include/mach/pinconf-tegra.h

@@ -0,0 +1,63 @@
+/*
+ * pinctrl configuration definitions for the NVIDIA Tegra pinmux
+ *
+ * Copyright (c) 2011, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ */
+
+#ifndef __PINCONF_TEGRA_H__
+#define __PINCONF_TEGRA_H__
+
+enum tegra_pinconf_param {
+	/* argument: tegra_pinconf_pull */
+	TEGRA_PINCONF_PARAM_PULL,
+	/* argument: tegra_pinconf_tristate */
+	TEGRA_PINCONF_PARAM_TRISTATE,
+	/* argument: Boolean */
+	TEGRA_PINCONF_PARAM_ENABLE_INPUT,
+	/* argument: Boolean */
+	TEGRA_PINCONF_PARAM_OPEN_DRAIN,
+	/* argument: Boolean */
+	TEGRA_PINCONF_PARAM_LOCK,
+	/* argument: Boolean */
+	TEGRA_PINCONF_PARAM_IORESET,
+	/* argument: Boolean */
+	TEGRA_PINCONF_PARAM_HIGH_SPEED_MODE,
+	/* argument: Boolean */
+	TEGRA_PINCONF_PARAM_SCHMITT,
+	/* argument: Boolean */
+	TEGRA_PINCONF_PARAM_LOW_POWER_MODE,
+	/* argument: Integer, range is HW-dependant */
+	TEGRA_PINCONF_PARAM_DRIVE_DOWN_STRENGTH,
+	/* argument: Integer, range is HW-dependant */
+	TEGRA_PINCONF_PARAM_DRIVE_UP_STRENGTH,
+	/* argument: Integer, range is HW-dependant */
+	TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING,
+	/* argument: Integer, range is HW-dependant */
+	TEGRA_PINCONF_PARAM_SLEW_RATE_RISING,
+};
+
+enum tegra_pinconf_pull {
+	TEGRA_PINCONFIG_PULL_NONE,
+	TEGRA_PINCONFIG_PULL_DOWN,
+	TEGRA_PINCONFIG_PULL_UP,
+};
+
+enum tegra_pinconf_tristate {
+	TEGRA_PINCONFIG_DRIVEN,
+	TEGRA_PINCONFIG_TRISTATE,
+};
+
+#define TEGRA_PINCONF_PACK(_param_, _arg_) ((_param_) << 16 | (_arg_))
+#define TEGRA_PINCONF_UNPACK_PARAM(_conf_) ((_conf_) >> 16)
+#define TEGRA_PINCONF_UNPACK_ARG(_conf_) ((_conf_) & 0xffff)
+
+#endif

drivers/pinctrl/Kconfig

@@ -28,6 +28,21 @@ config PINCTRL_SIRF
 	depends on ARCH_PRIMA2
 	select PINMUX
 
+config PINCTRL_TEGRA
+	bool
+
+config PINCTRL_TEGRA20
+	bool
+	select PINMUX
+	select PINCONF
+	select PINCTRL_TEGRA
+
+config PINCTRL_TEGRA30
+	bool
+	select PINMUX
+	select PINCONF
+	select PINCTRL_TEGRA
+
 config PINCTRL_U300
 	bool "U300 pin controller driver"
 	depends on ARCH_U300

drivers/pinctrl/Makefile

@@ -6,5 +6,8 @@ obj-$(CONFIG_PINCTRL)		+= core.o
 obj-$(CONFIG_PINMUX)		+= pinmux.o
 obj-$(CONFIG_PINCONF)		+= pinconf.o
 obj-$(CONFIG_PINCTRL_SIRF)	+= pinctrl-sirf.o
+obj-$(CONFIG_PINCTRL_TEGRA)	+= pinctrl-tegra.o
+obj-$(CONFIG_PINCTRL_TEGRA20)	+= pinctrl-tegra20.o
+obj-$(CONFIG_PINCTRL_TEGRA30)	+= pinctrl-tegra30.o
 obj-$(CONFIG_PINCTRL_U300)	+= pinctrl-u300.o
 obj-$(CONFIG_PINCTRL_COH901)	+= pinctrl-coh901.o