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Subject[PATCH 2/7] pinctrl: at91: add drive strength support for SAM9X60
Date
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 | 52 ++++++++++++++++++++++++++++++++++++++++++
drivers/pinctrl/pinctrl-at91.h | 2 ++
2 files changed, 54 insertions(+)

diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
index 31f06dafca2e..46443b97d811 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,
diff --git a/drivers/pinctrl/pinctrl-at91.h b/drivers/pinctrl/pinctrl-at91.h
index 79b957f1dfa2..19fc27e66bfd 100644
--- a/drivers/pinctrl/pinctrl-at91.h
+++ b/drivers/pinctrl/pinctrl-at91.h
@@ -69,4 +69,6 @@
#define AT91SAM9X5_PIO_DRIVER1 0x114 /*PIO Driver 1 register offset*/
#define AT91SAM9X5_PIO_DRIVER2 0x118 /*PIO Driver 2 register offset*/

+#define SAM9X60_PIO_DRIVER1 0x118 /* PIO Driver 1 register offset */
+
#endif
--
2.7.4
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