add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/gpio/gpio-mxs.c
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@@ -84,7 +84,7 @@
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 	port->both_edges &= ~pin_mask;
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 	switch (type) {
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 	case IRQ_TYPE_EDGE_BOTH:
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-		val = port->gc.get(&port->gc, d->hwirq);
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+		val = readl(port->base + PINCTRL_DIN(port)) & pin_mask;
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 		if (val)
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 			edge = GPIO_INT_FALL_EDGE;
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 		else
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@@ -248,7 +248,10 @@
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 	u32 dir;
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 	dir = readl(port->base + PINCTRL_DOE(port));
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-	return !(dir & mask);
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+	if (dir & mask)
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+		return GPIO_LINE_DIRECTION_OUT;
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+
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+	return GPIO_LINE_DIRECTION_IN;
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 }
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 static const struct platform_device_id mxs_gpio_ids[] = {