u-boot/arch/arm/mach-sunxi/pinmux.c
Andre Przywara 8695b5111c sunxi: gpio: Fix up pointer arithmetic
The calls for flipping bits in the Allwinner pin controller registers
were using unnecessarily complex pointer arithmetic.

Improve readability by simplifying the expression.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
2022-01-30 01:25:00 +00:00

78 lines
1.8 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2007-2011
* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
* Tom Cubie <tangliang@allwinnertech.com>
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/gpio.h>
void sunxi_gpio_set_cfgbank(struct sunxi_gpio *pio, int bank_offset, u32 val)
{
u32 index = GPIO_CFG_INDEX(bank_offset);
u32 offset = GPIO_CFG_OFFSET(bank_offset);
clrsetbits_le32(&pio->cfg[index], 0xf << offset, val << offset);
}
void sunxi_gpio_set_cfgpin(u32 pin, u32 val)
{
u32 bank = GPIO_BANK(pin);
struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
sunxi_gpio_set_cfgbank(pio, pin, val);
}
int sunxi_gpio_get_cfgbank(struct sunxi_gpio *pio, int bank_offset)
{
u32 index = GPIO_CFG_INDEX(bank_offset);
u32 offset = GPIO_CFG_OFFSET(bank_offset);
u32 cfg;
cfg = readl(&pio->cfg[index]);
cfg >>= offset;
return cfg & 0xf;
}
int sunxi_gpio_get_cfgpin(u32 pin)
{
u32 bank = GPIO_BANK(pin);
struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
return sunxi_gpio_get_cfgbank(pio, pin);
}
void sunxi_gpio_set_drv(u32 pin, u32 val)
{
u32 bank = GPIO_BANK(pin);
struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
sunxi_gpio_set_drv_bank(pio, pin, val);
}
void sunxi_gpio_set_drv_bank(struct sunxi_gpio *pio, u32 bank_offset, u32 val)
{
u32 index = GPIO_DRV_INDEX(bank_offset);
u32 offset = GPIO_DRV_OFFSET(bank_offset);
clrsetbits_le32(&pio->drv[index], 0x3 << offset, val << offset);
}
void sunxi_gpio_set_pull(u32 pin, u32 val)
{
u32 bank = GPIO_BANK(pin);
struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
sunxi_gpio_set_pull_bank(pio, pin, val);
}
void sunxi_gpio_set_pull_bank(struct sunxi_gpio *pio, int bank_offset, u32 val)
{
u32 index = GPIO_PULL_INDEX(bank_offset);
u32 offset = GPIO_PULL_OFFSET(bank_offset);
clrsetbits_le32(&pio->pull[index], 0x3 << offset, val << offset);
}