drivers: mentor: mi2cv: add inverted interrupt clear flag quirk

The I2C controller on Allwinner SoCs after A31 has a inverted interrupt
clear flag, which needs to be written 1 (rather than 0 on Marvell SoCs
and old Allwinner SoCs) to clear.

Add such a quirk to mi2cv driver common code.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>

drivers/mentor/i2c/mi2cv.c

@@ -68,7 +68,11 @@ static void mentor_i2c_interrupt_clear(void)
 	uint32_t reg;
 
 	reg = mmio_read_32((uintptr_t)&base->control);
+#ifndef I2C_INTERRUPT_CLEAR_INVERTED
 	reg &= ~(I2C_CONTROL_IFLG);
+#else
+	reg |= I2C_CONTROL_IFLG;
+#endif
 	mmio_write_32((uintptr_t)&base->control, reg);
 	/* Wait for 1 us for the clear to take effect */
 	udelay(1);