mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-13 16:36:53 +07:00
5f3fcf9649
The <mach/gpio.h> file is included from upper directories and deal with generic GPIO and gpiolib stuff. Break out the platform and driver specific defines and functions into its own header file. Cc: Sekhar Nori <nsekhar@ti.com> Cc: Kevin Hilman <khilman@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/*
|
|
* TI DaVinci GPIO Support
|
|
*
|
|
* Copyright (c) 2006 David Brownell
|
|
* Copyright (c) 2007, MontaVista Software, Inc. <source@mvista.com>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef __DAVINCI_DAVINCI_GPIO_H
|
|
#define __DAVINCI_DAVINCI_GPIO_H
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#include <asm-generic/gpio.h>
|
|
|
|
#include <mach/irqs.h>
|
|
#include <mach/common.h>
|
|
|
|
#define DAVINCI_GPIO_BASE 0x01C67000
|
|
|
|
enum davinci_gpio_type {
|
|
GPIO_TYPE_DAVINCI = 0,
|
|
GPIO_TYPE_TNETV107X,
|
|
};
|
|
|
|
/*
|
|
* basic gpio routines
|
|
*
|
|
* board-specific init should be done by arch/.../.../board-XXX.c (maybe
|
|
* initializing banks together) rather than boot loaders; kexec() won't
|
|
* go through boot loaders.
|
|
*
|
|
* the gpio clock will be turned on when gpios are used, and you may also
|
|
* need to pay attention to PINMUX registers to be sure those pins are
|
|
* used as gpios, not with other peripherals.
|
|
*
|
|
* On-chip GPIOs are numbered 0..(DAVINCI_N_GPIO-1). For documentation,
|
|
* and maybe for later updates, code may write GPIO(N). These may be
|
|
* all 1.8V signals, all 3.3V ones, or a mix of the two. A given chip
|
|
* may not support all the GPIOs in that range.
|
|
*
|
|
* GPIOs can also be on external chips, numbered after the ones built-in
|
|
* to the DaVinci chip. For now, they won't be usable as IRQ sources.
|
|
*/
|
|
#define GPIO(X) (X) /* 0 <= X <= (DAVINCI_N_GPIO - 1) */
|
|
|
|
/* Convert GPIO signal to GPIO pin number */
|
|
#define GPIO_TO_PIN(bank, gpio) (16 * (bank) + (gpio))
|
|
|
|
struct davinci_gpio_controller {
|
|
struct gpio_chip chip;
|
|
int irq_base;
|
|
spinlock_t lock;
|
|
void __iomem *regs;
|
|
void __iomem *set_data;
|
|
void __iomem *clr_data;
|
|
void __iomem *in_data;
|
|
};
|
|
|
|
/* The __gpio_to_controller() and __gpio_mask() functions inline to constants
|
|
* with constant parameters; or in outlined code they execute at runtime.
|
|
*
|
|
* You'd access the controller directly when reading or writing more than
|
|
* one gpio value at a time, and to support wired logic where the value
|
|
* being driven by the cpu need not match the value read back.
|
|
*
|
|
* These are NOT part of the cross-platform GPIO interface
|
|
*/
|
|
static inline struct davinci_gpio_controller *
|
|
__gpio_to_controller(unsigned gpio)
|
|
{
|
|
struct davinci_gpio_controller *ctlrs = davinci_soc_info.gpio_ctlrs;
|
|
int index = gpio / 32;
|
|
|
|
if (!ctlrs || index >= davinci_soc_info.gpio_ctlrs_num)
|
|
return NULL;
|
|
|
|
return ctlrs + index;
|
|
}
|
|
|
|
static inline u32 __gpio_mask(unsigned gpio)
|
|
{
|
|
return 1 << (gpio % 32);
|
|
}
|
|
|
|
#endif /* __DAVINCI_DAVINCI_GPIO_H */
|