From: Claudiu Beznea claudiu.beznea@microchip.com
Add drive strength support for SAM9X60 pin controller.
Signed-off-by: Claudiu Beznea claudiu.beznea@microchip.com --- drivers/pinctrl/pinctrl-at91.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+)
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c index 8997732376e4..134ee851d978 100644 --- a/drivers/pinctrl/pinctrl-at91.c +++ b/drivers/pinctrl/pinctrl-at91.c @@ -248,6 +248,28 @@ static void at91_mux_sam9x5_set_drivestrength(struct at91_port *pio, set_drive_strength(reg, pin, setting); }
+static void at91_mux_sam9x60_set_drivestrength(struct at91_port *pio, u32 pin, + u32 setting) +{ + void *reg = &pio->driver12; + u32 tmp; + + if (setting <= DRIVE_STRENGTH_BIT_DEF || + setting == DRIVE_STRENGTH_BIT_MED || + setting > DRIVE_STRENGTH_BIT_HI) + return; + + tmp = readl(reg); + + /* Strength is 0: low, 1: hi */ + if (setting == DRIVE_STRENGTH_BIT_LOW) + tmp &= ~BIT(pin); + else + tmp |= BIT(pin); + + writel(tmp, reg); +} + static struct at91_pinctrl_mux_ops at91rm9200_ops = { .mux_A_periph = at91_mux_set_A_periph, .mux_B_periph = at91_mux_set_B_periph, @@ -278,6 +300,18 @@ static struct at91_pinctrl_mux_ops sama5d3_ops = { .set_drivestrength = at91_mux_sama5d3_set_drivestrength, };
+static struct at91_pinctrl_mux_ops sam9x60_ops = { + .mux_A_periph = at91_mux_pio3_set_A_periph, + .mux_B_periph = at91_mux_pio3_set_B_periph, + .mux_C_periph = at91_mux_pio3_set_C_periph, + .mux_D_periph = at91_mux_pio3_set_D_periph, + .set_deglitch = at91_mux_pio3_set_deglitch, + .set_debounce = at91_mux_pio3_set_debounce, + .set_pulldown = at91_mux_pio3_set_pulldown, + .disable_schmitt_trig = at91_mux_pio3_disable_schmitt_trig, + .set_drivestrength = at91_mux_sam9x60_set_drivestrength, +}; + static void at91_mux_gpio_disable(struct at91_port *pio, u32 mask) { writel(mask, &pio->pdr);