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| author | Claudiu Beznea <claudiu.beznea@microchip.com> | 2019-02-07 10:24:49 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2019-02-08 13:05:23 +0100 |
| commit | 42ef75576bdd2ca8019c553d25847e124153a7ee (patch) | |
| tree | bc5a393d08a4eb5b55865363eaf14692b901f2cb /drivers/pinctrl/pinctrl-at91.c | |
| parent | pinctrl: at91: add option to use drive strength bits (diff) | |
| download | linux-42ef75576bdd2ca8019c553d25847e124153a7ee.tar.xz linux-42ef75576bdd2ca8019c553d25847e124153a7ee.zip | |
pinctrl: at91: add drive strength support for SAM9X60
Add drive strength support for SAM9X60 pin controller.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-at91.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-at91.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c index e907093b5b13..6f443c3728cb 100644 --- a/drivers/pinctrl/pinctrl-at91.c +++ b/drivers/pinctrl/pinctrl-at91.c @@ -574,6 +574,17 @@ static unsigned at91_mux_sam9x5_get_drivestrength(void __iomem *pio, return tmp; } +static unsigned at91_mux_sam9x60_get_drivestrength(void __iomem *pio, + unsigned pin) +{ + unsigned tmp = readl_relaxed(pio + SAM9X60_PIO_DRIVER1); + + if (tmp & BIT(pin)) + return DRIVE_STRENGTH_BIT_HI; + + return DRIVE_STRENGTH_BIT_LOW; +} + static void set_drive_strength(void __iomem *reg, unsigned pin, u32 strength) { unsigned tmp = readl_relaxed(reg); @@ -611,6 +622,27 @@ static void at91_mux_sam9x5_set_drivestrength(void __iomem *pio, unsigned pin, setting); } +static void at91_mux_sam9x60_set_drivestrength(void __iomem *pio, unsigned pin, + u32 setting) +{ + unsigned int tmp; + + if (setting <= DRIVE_STRENGTH_BIT_DEF || + setting == DRIVE_STRENGTH_BIT_MED || + setting > DRIVE_STRENGTH_BIT_HI) + return; + + tmp = readl_relaxed(pio + SAM9X60_PIO_DRIVER1); + + /* Strength is 0: low, 1: hi */ + if (setting == DRIVE_STRENGTH_BIT_LOW) + tmp &= ~BIT(pin); + else + tmp |= BIT(pin); + + writel_relaxed(tmp, pio + SAM9X60_PIO_DRIVER1); +} + static struct at91_pinctrl_mux_ops at91rm9200_ops = { .get_periph = at91_mux_get_periph, .mux_A_periph = at91_mux_set_A_periph, @@ -639,6 +671,26 @@ static struct at91_pinctrl_mux_ops at91sam9x5_ops = { .irq_type = alt_gpio_irq_type, }; +static const struct at91_pinctrl_mux_ops sam9x60_ops = { + .get_periph = at91_mux_pio3_get_periph, + .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, + .get_deglitch = at91_mux_pio3_get_deglitch, + .set_deglitch = at91_mux_pio3_set_deglitch, + .get_debounce = at91_mux_pio3_get_debounce, + .set_debounce = at91_mux_pio3_set_debounce, + .get_pulldown = at91_mux_pio3_get_pulldown, + .set_pulldown = at91_mux_pio3_set_pulldown, + .get_schmitt_trig = at91_mux_pio3_get_schmitt_trig, + .disable_schmitt_trig = at91_mux_pio3_disable_schmitt_trig, + .get_drivestrength = at91_mux_sam9x60_get_drivestrength, + .set_drivestrength = at91_mux_sam9x60_set_drivestrength, + .irq_type = alt_gpio_irq_type, + +}; + static struct at91_pinctrl_mux_ops sama5d3_ops = { .get_periph = at91_mux_pio3_get_periph, .mux_A_periph = at91_mux_pio3_set_A_periph, |