static int gpio_rcar_get(struct gpio_chip *chip, unsigned offset)
{
u32 bit = BIT(offset);
/* testing on r8a7790 shows that INDT does not show correct pin state
* when configured as output, so use OUTDT in case of output pins */
if (gpio_rcar_read(gpio_to_priv(chip), INOUTSEL) & bit)
return !!(gpio_rcar_read(gpio_to_priv(chip), OUTDT) & bit);
else
return !!(gpio_rcar_read(gpio_to_priv(chip), INDT) & bit);
}
static void __em_gio_set(struct gpio_chip *chip, unsigned int reg,
unsigned shift, int value)
{
/* upper 16 bits contains mask and lower 16 actual value */
em_gio_write(gpio_to_priv(chip), reg,
(BIT(shift + 16)) | (value << shift));
}
static void gpio_rcar_config_general_input_output_mode(struct gpio_chip *chip,
unsigned int gpio,
bool output)
{
struct gpio_rcar_priv *p = gpio_to_priv(chip);
unsigned long flags;
/* follow steps in the GPIO documentation for
* "Setting General Output Mode" and
* "Setting General Input Mode"
*/
spin_lock_irqsave(&p->lock, flags);
/* Configure postive logic in POSNEG */
gpio_rcar_modify_bit(p, POSNEG, gpio, false);
/* Select "General Input/Output Mode" in IOINTSEL */
gpio_rcar_modify_bit(p, IOINTSEL, gpio, false);
/* Select Input Mode or Output Mode in INOUTSEL */
gpio_rcar_modify_bit(p, INOUTSEL, gpio, output);
spin_unlock_irqrestore(&p->lock, flags);
}
static int em_gio_direction_output(struct gpio_chip *chip, unsigned offset,
int value)
{
/* write GPIO value to output before selecting output mode of pin */
em_gio_set(chip, offset, value);
em_gio_write(gpio_to_priv(chip), GIO_E1, BIT(offset));
return 0;
}
static void gpio_rcar_set(struct gpio_chip *chip, unsigned offset, int value)
{
struct gpio_rcar_priv *p = gpio_to_priv(chip);
unsigned long flags;
spin_lock_irqsave(&p->lock, flags);
gpio_rcar_modify_bit(p, OUTDT, offset, value);
spin_unlock_irqrestore(&p->lock, flags);
}
static void gpio_rcar_free(struct gpio_chip *chip, unsigned offset)
{
struct gpio_rcar_priv *p = gpio_to_priv(chip);
pinctrl_free_gpio(chip->base + offset);
/* Set the GPIO as an input to ensure that the next GPIO request won't
* drive the GPIO pin as an output.
*/
gpio_rcar_config_general_input_output_mode(chip, offset, false);
pm_runtime_put(&p->pdev->dev);
}
static int gpio_rcar_request(struct gpio_chip *chip, unsigned offset)
{
struct gpio_rcar_priv *p = gpio_to_priv(chip);
int error;
error = pm_runtime_get_sync(&p->pdev->dev);
if (error < 0)
return error;
error = pinctrl_request_gpio(chip->base + offset);
if (error)
pm_runtime_put(&p->pdev->dev);
return error;
}
static int em_gio_to_irq(struct gpio_chip *chip, unsigned offset)
{
return irq_create_mapping(gpio_to_priv(chip)->irq_domain, offset);
}
static int em_gio_get(struct gpio_chip *chip, unsigned offset)
{
return (int)(em_gio_read(gpio_to_priv(chip), GIO_I) & BIT(offset));
}
static int em_gio_direction_input(struct gpio_chip *chip, unsigned offset)
{
em_gio_write(gpio_to_priv(chip), GIO_E0, BIT(offset));
return 0;
}
