diff options
Diffstat (limited to 'drivers/gpio/vybrid_gpio.c')
| -rw-r--r-- | drivers/gpio/vybrid_gpio.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/drivers/gpio/vybrid_gpio.c b/drivers/gpio/vybrid_gpio.c new file mode 100644 index 0000000000..a508397e17 --- /dev/null +++ b/drivers/gpio/vybrid_gpio.c @@ -0,0 +1,84 @@ +/* + * Copyright (C) 2015 + * Bhuvanchandra DV, Toradex, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/gpio.h> +#include <asm/io.h> +#include <asm/arch/imx-regs.h> +#include <asm/imx-common/iomux-v3.h> + +static unsigned long gpio_ports[] = { + [0] = GPIO0_BASE_ADDR, + [1] = GPIO1_BASE_ADDR, + [2] = GPIO2_BASE_ADDR, + [3] = GPIO3_BASE_ADDR, + [4] = GPIO4_BASE_ADDR, +}; + +int gpio_set_value(unsigned gpio, int value) +{ + unsigned int port = GPIO_TO_PORT(gpio); + struct gpio_regs *regs; + u32 mask = (1 << (gpio & GPIO_PIN_MASK)); + + if (port >= ARRAY_SIZE(gpio_ports)) + return -1; + + regs = (struct gpio_regs *)gpio_ports[port]; + + if (value) + writel(mask, ®s->gpio_psor); + else + writel(mask, ®s->gpio_pcor); + + return 0; +} + +int gpio_get_value(unsigned gpio) +{ + unsigned int port = GPIO_TO_PORT(gpio); + struct gpio_regs *regs; + u32 mask = (1 << (gpio & GPIO_PIN_MASK)); + + if (port >= ARRAY_SIZE(gpio_ports)) + return -1; + + regs = (struct gpio_regs *)gpio_ports[port]; + + return ((readl(®s->gpio_pdir) & mask)) ? 1 : 0; +} + +int gpio_request(unsigned gpio, const char *label) +{ + unsigned int port = GPIO_TO_PORT(gpio); + + if (port >= ARRAY_SIZE(gpio_ports)) + return -1; + + return 0; +} + +int gpio_free(unsigned gpio) +{ + return 0; +} + +int gpio_direction_input(unsigned gpio) +{ + imx_iomux_gpio_set_direction(gpio, VF610_GPIO_DIRECTION_IN); + + return 0; +} + +int gpio_direction_output(unsigned gpio, int value) +{ + gpio_set_value(gpio, value); + + imx_iomux_gpio_set_direction(gpio, VF610_GPIO_DIRECTION_OUT); + + return 0; +} |