diff options
Diffstat (limited to 'arch/arm/mach-imx/iomux-imx31.c')
| -rw-r--r-- | arch/arm/mach-imx/iomux-imx31.c | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/arch/arm/mach-imx/iomux-imx31.c b/arch/arm/mach-imx/iomux-imx31.c deleted file mode 100644 index abfc306655c8..000000000000 --- a/arch/arm/mach-imx/iomux-imx31.c +++ /dev/null @@ -1,161 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * Copyright 2004-2006 Freescale Semiconductor, Inc. All Rights Reserved. - * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de> - * Copyright (C) 2009 by Valentin Longchamp <valentin.longchamp@epfl.ch> - */ -#include <linux/gpio.h> -#include <linux/module.h> -#include <linux/spinlock.h> -#include <linux/io.h> -#include <linux/kernel.h> - -#include "hardware.h" -#include "iomux-mx3.h" - -/* - * IOMUX register (base) addresses - */ -#define IOMUX_BASE MX31_IO_ADDRESS(MX31_IOMUXC_BASE_ADDR) -#define IOMUXINT_OBS1 (IOMUX_BASE + 0x000) -#define IOMUXINT_OBS2 (IOMUX_BASE + 0x004) -#define IOMUXGPR (IOMUX_BASE + 0x008) -#define IOMUXSW_MUX_CTL (IOMUX_BASE + 0x00C) -#define IOMUXSW_PAD_CTL (IOMUX_BASE + 0x154) - -static DEFINE_SPINLOCK(gpio_mux_lock); - -#define IOMUX_REG_MASK (IOMUX_PADNUM_MASK & ~0x3) - -static DECLARE_BITMAP(mxc_pin_alloc_map, NB_PORTS * 32); -/* - * set the mode for a IOMUX pin. - */ -void mxc_iomux_mode(unsigned int pin_mode) -{ - u32 field; - u32 l; - u32 mode; - void __iomem *reg; - - reg = IOMUXSW_MUX_CTL + (pin_mode & IOMUX_REG_MASK); - field = pin_mode & 0x3; - mode = (pin_mode & IOMUX_MODE_MASK) >> IOMUX_MODE_SHIFT; - - spin_lock(&gpio_mux_lock); - - l = imx_readl(reg); - l &= ~(0xff << (field * 8)); - l |= mode << (field * 8); - imx_writel(l, reg); - - spin_unlock(&gpio_mux_lock); -} - -/* - * This function configures the pad value for a IOMUX pin. - */ -void mxc_iomux_set_pad(enum iomux_pins pin, u32 config) -{ - u32 field, l; - void __iomem *reg; - - pin &= IOMUX_PADNUM_MASK; - reg = 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); - - spin_lock(&gpio_mux_lock); - - l = imx_readl(reg); - l &= ~(0x1ff << (field * 10)); - l |= config << (field * 10); - imx_writel(l, reg); - - spin_unlock(&gpio_mux_lock); -} - -/* - * allocs a single pin: - * - reserves the pin so that it is not claimed by another driver - * - setups the iomux according to the configuration - */ -int mxc_iomux_alloc_pin(unsigned int pin, const char *label) -{ - unsigned pad = pin & IOMUX_PADNUM_MASK; - - if (pad >= (PIN_MAX + 1)) { - printk(KERN_ERR "mxc_iomux: Attempt to request nonexistent pin %u for \"%s\"\n", - pad, label ? label : "?"); - return -EINVAL; - } - - if (test_and_set_bit(pad, mxc_pin_alloc_map)) { - printk(KERN_ERR "mxc_iomux: pin %u already used. Allocation for \"%s\" failed\n", - pad, label ? label : "?"); - return -EBUSY; - } - mxc_iomux_mode(pin); - - return 0; -} - -int mxc_iomux_setup_multiple_pins(const unsigned int *pin_list, unsigned count, - const char *label) -{ - const unsigned int *p = pin_list; - int i; - int ret = -EINVAL; - - for (i = 0; i < count; i++) { - ret = mxc_iomux_alloc_pin(*p, label); - if (ret) - goto setup_error; - p++; - } - return 0; - -setup_error: - mxc_iomux_release_multiple_pins(pin_list, i); - return ret; -} - -void mxc_iomux_release_pin(unsigned int pin) -{ - unsigned pad = pin & IOMUX_PADNUM_MASK; - - if (pad < (PIN_MAX + 1)) - clear_bit(pad, mxc_pin_alloc_map); -} - -void mxc_iomux_release_multiple_pins(const unsigned int *pin_list, int count) -{ - const unsigned int *p = pin_list; - int i; - - for (i = 0; i < count; i++) { - mxc_iomux_release_pin(*p); - p++; - } -} - -/* - * This function enables/disables the general purpose function for a particular - * signal. - */ -void mxc_iomux_set_gpr(enum iomux_gp_func gp, bool en) -{ - u32 l; - - spin_lock(&gpio_mux_lock); - l = imx_readl(IOMUXGPR); - if (en) - l |= gp; - else - l &= ~gp; - - imx_writel(l, IOMUXGPR); - spin_unlock(&gpio_mux_lock); -} |