gpio: mpc8xxx: Remove *read_reg and *write_reg from struct mpc8xxx_gpio_chip

*read_reg and *write_reg can be removed because at all the places to call
them, we can just use gc->read_reg/gc->write_reg instead.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-mpc8xxx.c

@@ -37,9 +37,6 @@ struct mpc8xxx_gpio_chip {
 	void __iomem *regs;
 	raw_spinlock_t lock;
 
-	unsigned long (*read_reg)(void __iomem *reg);
-	void (*write_reg)(void __iomem *reg, unsigned long data);
-
 	int (*direction_output)(struct gpio_chip *chip,
 				unsigned offset, int value);
 
@@ -58,8 +55,8 @@ static int mpc8572_gpio_get(struct gpio_chip *gc, unsigned int gpio)
 	struct mpc8xxx_gpio_chip *mpc8xxx_gc = gpiochip_get_data(gc);
 	u32 out_mask, out_shadow;
 
-	out_mask = mpc8xxx_gc->read_reg(mpc8xxx_gc->regs + GPIO_DIR);
-	val = mpc8xxx_gc->read_reg(mpc8xxx_gc->regs + GPIO_DAT) & ~out_mask;
+	out_mask = gc->read_reg(mpc8xxx_gc->regs + GPIO_DIR);
+	val = gc->read_reg(mpc8xxx_gc->regs + GPIO_DAT) & ~out_mask;
 	out_shadow = gc->bgpio_data & out_mask;
 
 	return !!((val | out_shadow) & gc->pin2mask(gc, gpio));
@@ -101,10 +98,11 @@ static void mpc8xxx_gpio_irq_cascade(struct irq_desc *desc)
 {
 	struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_desc_get_handler_data(desc);
 	struct irq_chip *chip = irq_desc_get_chip(desc);
+	struct gpio_chip *gc = &mpc8xxx_gc->gc;
 	unsigned int mask;
 
-	mask = mpc8xxx_gc->read_reg(mpc8xxx_gc->regs + GPIO_IER)
-		& mpc8xxx_gc->read_reg(mpc8xxx_gc->regs + GPIO_IMR);
+	mask = gc->read_reg(mpc8xxx_gc->regs + GPIO_IER)
+		& gc->read_reg(mpc8xxx_gc->regs + GPIO_IMR);
 	if (mask)
 		generic_handle_irq(irq_linear_revmap(mpc8xxx_gc->irq,
 						     32 - ffs(mask)));
@@ -120,8 +118,8 @@ static void mpc8xxx_irq_unmask(struct irq_data *d)
 
 	raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
 
-	mpc8xxx_gc->write_reg(mpc8xxx_gc->regs + GPIO_IMR,
-		mpc8xxx_gc->read_reg(mpc8xxx_gc->regs + GPIO_IMR)
+	gc->write_reg(mpc8xxx_gc->regs + GPIO_IMR,
+		gc->read_reg(mpc8xxx_gc->regs + GPIO_IMR)
 		| gc->pin2mask(gc, irqd_to_hwirq(d)));
 
 	raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
@@ -135,8 +133,8 @@ static void mpc8xxx_irq_mask(struct irq_data *d)
 
 	raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
 
-	mpc8xxx_gc->write_reg(mpc8xxx_gc->regs + GPIO_IMR,
-		mpc8xxx_gc->read_reg(mpc8xxx_gc->regs + GPIO_IMR)
+	gc->write_reg(mpc8xxx_gc->regs + GPIO_IMR,
+		gc->read_reg(mpc8xxx_gc->regs + GPIO_IMR)
 		& ~(gc->pin2mask(gc, irqd_to_hwirq(d))));
 
 	raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
@@ -147,7 +145,7 @@ static void mpc8xxx_irq_ack(struct irq_data *d)
 	struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
 	struct gpio_chip *gc = &mpc8xxx_gc->gc;
 
-	mpc8xxx_gc->write_reg(mpc8xxx_gc->regs + GPIO_IER,
+	gc->write_reg(mpc8xxx_gc->regs + GPIO_IER,
 		      gc->pin2mask(gc, irqd_to_hwirq(d)));
 }
 
@@ -160,16 +158,16 @@ static int mpc8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type)
 	switch (flow_type) {
 	case IRQ_TYPE_EDGE_FALLING:
 		raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
-		mpc8xxx_gc->write_reg(mpc8xxx_gc->regs + GPIO_ICR,
-			mpc8xxx_gc->read_reg(mpc8xxx_gc->regs + GPIO_ICR)
+		gc->write_reg(mpc8xxx_gc->regs + GPIO_ICR,
+			gc->read_reg(mpc8xxx_gc->regs + GPIO_ICR)
 			| gc->pin2mask(gc, irqd_to_hwirq(d)));
 		raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
 		break;
 
 	case IRQ_TYPE_EDGE_BOTH:
 		raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
-		mpc8xxx_gc->write_reg(mpc8xxx_gc->regs + GPIO_ICR,
-			mpc8xxx_gc->read_reg(mpc8xxx_gc->regs + GPIO_ICR)
+		gc->write_reg(mpc8xxx_gc->regs + GPIO_ICR,
+			gc->read_reg(mpc8xxx_gc->regs + GPIO_ICR)
 			& ~(gc->pin2mask(gc, irqd_to_hwirq(d))));
 		raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
 		break;
@@ -184,6 +182,7 @@ static int mpc8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type)
 static int mpc512x_irq_set_type(struct irq_data *d, unsigned int flow_type)
 {
 	struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
+	struct gpio_chip *gc = &mpc8xxx_gc->gc;
 	unsigned long gpio = irqd_to_hwirq(d);
 	void __iomem *reg;
 	unsigned int shift;
@@ -201,8 +200,7 @@ static int mpc512x_irq_set_type(struct irq_data *d, unsigned int flow_type)
 	case IRQ_TYPE_EDGE_FALLING:
 	case IRQ_TYPE_LEVEL_LOW:
 		raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
-		mpc8xxx_gc->write_reg(reg,
-			(mpc8xxx_gc->read_reg(reg) & ~(3 << shift))
+		gc->write_reg(reg, (gc->read_reg(reg) & ~(3 << shift))
 			| (2 << shift));
 		raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
 		break;
@@ -210,16 +208,14 @@ static int mpc512x_irq_set_type(struct irq_data *d, unsigned int flow_type)
 	case IRQ_TYPE_EDGE_RISING:
 	case IRQ_TYPE_LEVEL_HIGH:
 		raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
-		mpc8xxx_gc->write_reg(reg,
-			(mpc8xxx_gc->read_reg(reg) & ~(3 << shift))
+		gc->write_reg(reg, (gc->read_reg(reg) & ~(3 << shift))
 			| (1 << shift));
 		raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
 		break;
 
 	case IRQ_TYPE_EDGE_BOTH:
 		raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
-		mpc8xxx_gc->write_reg(reg,
-			(mpc8xxx_gc->read_reg(reg) & ~(3 << shift)));
+		gc->write_reg(reg, (gc->read_reg(reg) & ~(3 << shift)));
 		raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
 		break;
 
@@ -332,8 +328,6 @@ static int mpc8xxx_probe(struct platform_device *pdev)
 		dev_dbg(&pdev->dev, "GPIO registers are BIG endian\n");
 	}
 
-	mpc8xxx_gc->read_reg = gc->read_reg;
-	mpc8xxx_gc->write_reg = gc->write_reg;
 	mpc8xxx_gc->direction_output = gc->direction_output;
 
 	if (!devtype)
@@ -366,8 +360,8 @@ static int mpc8xxx_probe(struct platform_device *pdev)
 		return 0;
 
 	/* ack and mask all irqs */
-	mpc8xxx_gc->write_reg(mpc8xxx_gc->regs + GPIO_IER, 0xffffffff);
-	mpc8xxx_gc->write_reg(mpc8xxx_gc->regs + GPIO_IMR, 0);
+	gc->write_reg(mpc8xxx_gc->regs + GPIO_IER, 0xffffffff);
+	gc->write_reg(mpc8xxx_gc->regs + GPIO_IMR, 0);
 
 	irq_set_chained_handler_and_data(mpc8xxx_gc->irqn,
 					 mpc8xxx_gpio_irq_cascade, mpc8xxx_gc);