From 074a1fdd27953aacb59346c83baaf443335ea04e Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Wed, 25 May 2016 14:38:51 -0600 Subject: gpio: add Tegra186 GPIO driver Tegra186's GPIO controller register layout is significantly different from previous chips, so add a new driver for it. In fact, there are two different GPIO controllers in Tegra186 that share a similar register layout, but very different port mapping. This driver covers both. The DT binding is already present in the Linux kernel (in linux-next via the Tegra tree so far). Signed-off-by: Stephen Warren Reviewed-by: Simon Glass # v1 Signed-off-by: Tom Warren --- drivers/gpio/tegra186_gpio_priv.h | 61 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 drivers/gpio/tegra186_gpio_priv.h (limited to 'drivers/gpio/tegra186_gpio_priv.h') diff --git a/drivers/gpio/tegra186_gpio_priv.h b/drivers/gpio/tegra186_gpio_priv.h new file mode 100644 index 0000000000..9e85a4343b --- /dev/null +++ b/drivers/gpio/tegra186_gpio_priv.h @@ -0,0 +1,61 @@ +/* + * Copyright (c) 2016, NVIDIA CORPORATION. + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#ifndef _TEGRA186_GPIO_PRIV_H_ +#define _TEGRA186_GPIO_PRIV_H_ + +/* + * For each GPIO, there are a set of registers than affect it, all packed + * back-to-back. + */ +#define TEGRA186_GPIO_ENABLE_CONFIG 0x00 +#define TEGRA186_GPIO_ENABLE_CONFIG_ENABLE BIT(0) +#define TEGRA186_GPIO_ENABLE_CONFIG_OUT BIT(1) +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SHIFT 2 +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_MASK 3 +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_NONE 0 +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_LEVEL 1 +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE 2 +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_DOUBLE_EDGE 3 +#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL_HIGH_RISING BIT(4) +#define TEGRA186_GPIO_ENABLE_CONFIG_DEBOUNCE_ENABLE BIT(5) +#define TEGRA186_GPIO_ENABLE_CONFIG_INTERRUPT_ENABLE BIT(6) +#define TEGRA186_GPIO_ENABLE_CONFIG_TIMESTAMPING_ENABLE BIT(7) + +#define TEGRA186_GPIO_DEBOUNCE_THRESHOLD 0x04 + +#define TEGRA186_GPIO_INPUT 0x08 + +#define TEGRA186_GPIO_OUTPUT_CONTROL 0x0c +#define TEGRA186_GPIO_OUTPUT_CONTROL_FLOATED BIT(0) + +#define TEGRA186_GPIO_OUTPUT_VALUE 0x10 +#define TEGRA186_GPIO_OUTPUT_VALUE_HIGH 1 + +#define TEGRA186_GPIO_INTERRUPT_CLEAR 0x14 + +/* + * 8 GPIOs are packed into a port. Their registers appear back-to-back in the + * port's address space. + */ +#define TEGRA186_GPIO_PER_GPIO_STRIDE 0x20 +#define TEGRA186_GPIO_PER_GPIO_COUNT 8 + +/* + * Per-port registers are packed immediately following all of a port's + * per-GPIO registers. + */ +#define TEGRA186_GPIO_INTERRUPT_STATUS_G 0x100 +#define TEGRA186_GPIO_INTERRUPT_STATUS_G_STRIDE 4 +#define TEGRA186_GPIO_INTERRUPT_STATUS_G_COUNT 8 + +/* + * The registers for multiple ports are packed together back-to-back to form + * the overall controller. + */ +#define TEGRA186_GPIO_PER_PORT_STRIDE 0x200 + +#endif -- cgit v1.2.1