[U-Boot] [PATCH 2/3] arm: Tegra2: GPIO: Add basic GPIO functionality

[Tom Warren <twarren.nvidia@gmail.com>]

Signed-off-by: Tom Warren <twarren@nvidia.com>
---
 arch/arm/include/asm/arch-tegra2/gpio.h   |   59 +++++++++++++++++++++++++++++
 arch/arm/include/asm/arch-tegra2/tegra2.h |    1 +
 2 files changed, 60 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/include/asm/arch-tegra2/gpio.h

diff --git a/arch/arm/include/asm/arch-tegra2/gpio.h b/arch/arm/include/asm/arch-tegra2/gpio.h
new file mode 100644
index 0000000..0fb8f0d
--- /dev/null
+++ b/arch/arm/include/asm/arch-tegra2/gpio.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2011, Google Inc. All rights reserved.
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _TEGRA2_GPIO_H_
+#define _TEGRA2_GPIO_H_
+
+/*
+ * The Tegra 2x GPIO controller has 222 GPIOs arranged in 8 banks of 4 ports,
+ * each with 8 GPIOs.
+ */
+#define TEGRA_GPIO_PORTS 4   /* The number of ports per bank */
+#define TEGRA_GPIO_BANKS 8   /* The number of banks */
+
+/* GPIO Controller registers for a single bank */
+struct gpio_ctlr_bank {
+	uint gpio_config[TEGRA_GPIO_PORTS];
+	uint gpio_dir_out[TEGRA_GPIO_PORTS];
+	uint gpio_out[TEGRA_GPIO_PORTS];
+	uint gpio_in[TEGRA_GPIO_PORTS];
+	uint gpio_int_status[TEGRA_GPIO_PORTS];
+	uint gpio_int_enable[TEGRA_GPIO_PORTS];
+	uint gpio_int_level[TEGRA_GPIO_PORTS];
+	uint gpio_int_clear[TEGRA_GPIO_PORTS];
+};
+
+struct gpio_ctlr {
+	struct gpio_ctlr_bank gpio_bank[TEGRA_GPIO_BANKS];
+};
+
+#define GPIO_BANK(x)	((x) >> 5)
+#define GPIO_PORT(x)	(((x) >> 3) & 0x3)
+#define GPIO_BIT(x)	((x) & 0x7)
+
+/*
+ * GPIO_PI3 = Port I = 8, bit = 3.
+ * Seaboard: used for UART/SPI selection
+ * Harmony: not used
+ */
+#define GPIO_PI3	((8 << 3) | 3)
+
+#endif	/* TEGRA2_GPIO_H_ */
diff --git a/arch/arm/include/asm/arch-tegra2/tegra2.h b/arch/arm/include/asm/arch-tegra2/tegra2.h
index 7b0f5cc..742a75a 100644
--- a/arch/arm/include/asm/arch-tegra2/tegra2.h
+++ b/arch/arm/include/asm/arch-tegra2/tegra2.h
@@ -30,6 +30,7 @@
 #define NV_PA_TMRUS_BASE	0x60005010
 #define NV_PA_CLK_RST_BASE	0x60006000
 #define NV_PA_FLOW_BASE		0x60007000
+#define NV_PA_GPIO_BASE		0x6000D000
 #define NV_PA_EVP_BASE		0x6000F000
 #define NV_PA_APB_MISC_BASE	0x70000000
 #define NV_PA_APB_UARTA_BASE	(NV_PA_APB_MISC_BASE + 0x6000)
-- 
1.7.4.3