diff --git a/arch/h8300/include/asm/io.h b/arch/h8300/include/asm/io.h
index bb837cd..f0e14f3 100644
--- a/arch/h8300/include/asm/io.h
+++ b/arch/h8300/include/asm/io.h
@@ -3,40 +3,45 @@
 
 #ifdef __KERNEL__
 
-#include <asm-generic/io.h>
-
 /* H8/300 internal I/O functions */
-static inline unsigned char ctrl_inb(unsigned long addr)
+
+#define __raw_readb __raw_readb
+static inline u8 __raw_readb(const volatile void __iomem *addr)
 {
-	return *(volatile unsigned char *)addr;
+	return *(volatile u8 *)addr;
 }
 
-static inline unsigned short ctrl_inw(unsigned long addr)
+#define __raw_readw __raw_readw
+static inline u16 __raw_readw(const volatile void __iomem *addr)
 {
-	return *(volatile unsigned short *)addr;
+	return *(volatile u16 *)addr;
 }
 
-static inline unsigned long ctrl_inl(unsigned long addr)
+#define __raw_readl __raw_readl
+static inline u32  __raw_readl(const volatile void __iomem *addr)
 {
-	return *(volatile unsigned long *)addr;
+	return *(volatile u32 *)addr;
 }
 
-static inline void ctrl_outb(unsigned char b, unsigned long addr)
+#define __raw_writeb __raw_writeb
+static inline void __raw_writeb(u8 b, const volatile void __iomem *addr)
 {
-	*(volatile unsigned char *)addr = b;
+	*(volatile u8 *)addr = b;
 }
 
-static inline void ctrl_outw(unsigned short b, unsigned long addr)
+#define __raw_writew __raw_writew
+static inline void __raw_writew(u16 b, const volatile void __iomem *addr)
 {
-	*(volatile unsigned short *)addr = b;
+	*(volatile u16 *)addr = b;
 }
 
-static inline void ctrl_outl(unsigned long b, unsigned long addr)
+#define __raw_writel __raw_writel
+static inline void __raw_writel(u32 b, const volatile void __iomem *addr)
 {
-	*(volatile unsigned long *)addr = b;
+	*(volatile u32 *)addr = b;
 }
 
-static inline void ctrl_bclr(int b, unsigned char *addr)
+static inline void ctrl_bclr(int b, void __iomem *addr)
 {
 	if (__builtin_constant_p(b))
 		__asm__("bclr %1,%0" : "+WU"(*addr): "i"(b));
@@ -44,7 +49,7 @@ static inline void ctrl_bclr(int b, unsigned char *addr)
 		__asm__("bclr %w1,%0" : "+WU"(*addr): "r"(b));
 }
 
-static inline void ctrl_bset(int b, unsigned char *addr)
+static inline void ctrl_bset(int b, void __iomem *addr)
 {
 	if (__builtin_constant_p(b))
 		__asm__("bset %1,%0" : "+WU"(*addr): "i"(b));
@@ -52,6 +57,8 @@ static inline void ctrl_bset(int b, unsigned char *addr)
 		__asm__("bset %w1,%0" : "+WU"(*addr): "r"(b));
 }
 
+#include <asm-generic/io.h>
+
 #endif /* __KERNEL__ */
 
 #endif /* _H8300_IO_H */
diff --git a/arch/h8300/kernel/setup.c b/arch/h8300/kernel/setup.c
index c772abe..e4985df 100644
--- a/arch/h8300/kernel/setup.c
+++ b/arch/h8300/kernel/setup.c
@@ -207,14 +207,14 @@ device_initcall(device_probe);
 #define get_wait(base, addr) ({		\
 	int baddr;			\
 	baddr = ((addr) / 0x200000 * 2);			     \
-	w *= (ctrl_inw((unsigned long)(base) + 2) & (3 << baddr)) + 1;	\
+	w *= (readw((base) + 2) & (3 << baddr)) + 1;		     \
 	})
 #endif
 #if defined(CONFIG_CPU_H8S)
 #define get_wait(base, addr) ({		\
 	int baddr;			\
 	baddr = ((addr) / 0x200000 * 16);			     \
-	w *= (ctrl_inl((unsigned long)(base) + 2) & (7 << baddr)) + 1;	\
+	w *= (readl((base) + 2) & (7 << baddr)) + 1;	\
 	})
 #endif
 
@@ -228,8 +228,8 @@ static __init int access_timing(void)
 
 	bsc = of_find_compatible_node(NULL, NULL, "renesas,h8300-bsc");
 	base = of_iomap(bsc, 0);
-	w = (ctrl_inb((unsigned long)base + 0) & bit)?2:1;
-	if (ctrl_inb((unsigned long)base + 1) & bit)
+	w = (readb(base + 0) & bit)?2:1;
+	if (readb(base + 1) & bit)
 		w *= get_wait(base, addr);
 	else
 		w *= 2;
diff --git a/drivers/clocksource/h8300_timer16.c b/drivers/clocksource/h8300_timer16.c
index f396605..fc14a3f 100644
--- a/drivers/clocksource/h8300_timer16.c
+++ b/drivers/clocksource/h8300_timer16.c
@@ -23,8 +23,8 @@
 struct timer16_priv {
 	struct clocksource cs;
 	unsigned long total_cycles;
-	unsigned long mapbase;
-	unsigned long mapcommon;
+	void __iomem *mapbase;
+	void __iomem *mapcommon;
 	unsigned short cs_enabled;
 	unsigned char enb;
 	unsigned char imfa;
@@ -38,15 +38,15 @@ static unsigned long timer16_get_counter(struct timer16_priv *p)
 	unsigned long v1, v2, v3;
 	int o1, o2;
 
-	o1 = ctrl_inb(p->mapcommon + TISRC) & p->ovf;
+	o1 = readb(p->mapcommon + TISRC) & p->ovf;
 
 	/* Make sure the timer value is stable. Stolen from acpi_pm.c */
 	do {
 		o2 = o1;
-		v1 = ctrl_inw(p->mapbase + TCNT);
-		v2 = ctrl_inw(p->mapbase + TCNT);
-		v3 = ctrl_inw(p->mapbase + TCNT);
-		o1 = ctrl_inb(p->mapcommon + TISRC) & p->ovf;
+		v1 = readw(p->mapbase + TCNT);
+		v2 = readw(p->mapbase + TCNT);
+		v3 = readw(p->mapbase + TCNT);
+		o1 = readb(p->mapcommon + TISRC) & p->ovf;
 	} while (unlikely((o1 != o2) || (v1 > v2 && v1 < v3)
 			  || (v2 > v3 && v2 < v1) || (v3 > v1 && v3 < v2)));
 
@@ -59,7 +59,7 @@ static irqreturn_t timer16_interrupt(int irq, void *dev_id)
 {
 	struct timer16_priv *p = (struct timer16_priv *)dev_id;
 
-	ctrl_outb(ctrl_inb(p->mapcommon + TISRA) & ~p->imfa,
+	writeb(readb(p->mapcommon + TISRA) & ~p->imfa,
 		  p->mapcommon + TISRA);
 	p->total_cycles += 0x10000;
 
@@ -89,9 +89,9 @@ static int timer16_enable(struct clocksource *cs)
 	WARN_ON(p->cs_enabled);
 
 	p->total_cycles = 0;
-	ctrl_outw(0x0000, p->mapbase + TCNT);
-	ctrl_outb(0x83, p->mapbase + TCR);
-	ctrl_outb(ctrl_inb(p->mapcommon + TSTR) | p->enb,
+	writew(0x0000, p->mapbase + TCNT);
+	writeb(0x83, p->mapbase + TCR);
+	writeb(readb(p->mapcommon + TSTR) | p->enb,
 		  p->mapcommon + TSTR);
 
 	p->cs_enabled = true;
@@ -104,7 +104,7 @@ static void timer16_disable(struct clocksource *cs)
 
 	WARN_ON(!p->cs_enabled);
 
-	ctrl_outb(ctrl_inb(p->mapcommon + TSTR) & ~p->enb,
+	writeb(readb(p->mapcommon + TSTR) & ~p->enb,
 		  p->mapcommon + TSTR);
 
 	p->cs_enabled = false;
@@ -158,8 +158,8 @@ static void __init h8300_16timer_init(struct device_node *node)
 
 	of_property_read_u32(node, "renesas,channel", &ch);
 
-	timer16_priv.mapbase = (unsigned long)base[REG_CH];
-	timer16_priv.mapcommon = (unsigned long)base[REG_COMM];
+	timer16_priv.mapbase = base[REG_CH];
+	timer16_priv.mapcommon = base[REG_COMM];
 	timer16_priv.enb = 1 << ch;
 	timer16_priv.imfa = 1 << ch;
 	timer16_priv.imiea = 1 << (4 + ch);
diff --git a/drivers/clocksource/h8300_timer8.c b/drivers/clocksource/h8300_timer8.c
index 187c416..aa4b2a98 100644
--- a/drivers/clocksource/h8300_timer8.c
+++ b/drivers/clocksource/h8300_timer8.c
@@ -30,7 +30,7 @@
 
 struct timer8_priv {
 	struct clock_event_device ced;
-	unsigned long mapbase;
+	void __iomem *mapbase;
 	unsigned long flags;
 	unsigned int rate;
 	unsigned int tcora;
@@ -41,15 +41,15 @@ static unsigned long timer8_get_counter(struct timer8_priv *p)
 	unsigned long v1, v2, v3;
 	int o1, o2;
 
-	o1 = ctrl_inb(p->mapbase + _8TCSR) & 0x20;
+	o1 = readb(p->mapbase + _8TCSR) & 0x20;
 
 	/* Make sure the timer value is stable. Stolen from acpi_pm.c */
 	do {
 		o2 = o1;
-		v1 = ctrl_inw(p->mapbase + _8TCNT);
-		v2 = ctrl_inw(p->mapbase + _8TCNT);
-		v3 = ctrl_inw(p->mapbase + _8TCNT);
-		o1 = ctrl_inb(p->mapbase + _8TCSR) & 0x20;
+		v1 = readw(p->mapbase + _8TCNT);
+		v2 = readw(p->mapbase + _8TCNT);
+		v3 = readw(p->mapbase + _8TCNT);
+		o1 = readb(p->mapbase + _8TCSR) & 0x20;
 	} while (unlikely((o1 != o2) || (v1 > v2 && v1 < v3)
 			  || (v2 > v3 && v2 < v1) || (v3 > v1 && v3 < v2)));
 
@@ -61,13 +61,13 @@ static irqreturn_t timer8_interrupt(int irq, void *dev_id)
 {
 	struct timer8_priv *p = dev_id;
 
-	ctrl_outb(ctrl_inb(p->mapbase + _8TCSR) & ~0x40,
+	writeb(readb(p->mapbase + _8TCSR) & ~0x40,
 		  p->mapbase + _8TCSR);
 
-	ctrl_outw(p->tcora, p->mapbase + TCORA);
+	writew(p->tcora, p->mapbase + TCORA);
 
 	if (clockevent_state_oneshot(&p->ced))
-		ctrl_outw(0x0000, p->mapbase + _8TCR);
+		writew(0x0000, p->mapbase + _8TCR);
 
 	p->ced.event_handler(&p->ced);
 
@@ -82,18 +82,18 @@ static void timer8_set_next(struct timer8_priv *p, unsigned long delta)
 		pr_warn("delta out of range\n");
 	now = timer8_get_counter(p);
 	p->tcora = delta;
-	ctrl_outb(ctrl_inb(p->mapbase + _8TCR) | 0x40, p->mapbase + _8TCR);
+	writeb(readb(p->mapbase + _8TCR) | 0x40, p->mapbase + _8TCR);
 	if (delta > now)
-		ctrl_outw(delta, p->mapbase + TCORA);
+		writew(delta, p->mapbase + TCORA);
 	else
-		ctrl_outw(now + 1, p->mapbase + TCORA);
+		writew(now + 1, p->mapbase + TCORA);
 }
 
 static int timer8_enable(struct timer8_priv *p)
 {
-	ctrl_outw(0xffff, p->mapbase + TCORA);
-	ctrl_outw(0x0000, p->mapbase + _8TCNT);
-	ctrl_outw(0x0c02, p->mapbase + _8TCR);
+	writew(0xffff, p->mapbase + TCORA);
+	writew(0x0000, p->mapbase + _8TCNT);
+	writew(0x0c02, p->mapbase + _8TCR);
 
 	return 0;
 }
@@ -114,7 +114,7 @@ static int timer8_start(struct timer8_priv *p)
 
 static void timer8_stop(struct timer8_priv *p)
 {
-	ctrl_outw(0x0000, p->mapbase + _8TCR);
+	writew(0x0000, p->mapbase + _8TCR);
 }
 
 static inline struct timer8_priv *ced_to_priv(struct clock_event_device *ced)
@@ -213,7 +213,7 @@ static void __init h8300_8timer_init(struct device_node *node)
 		goto unmap_reg;
 	}
 
-	timer8_priv.mapbase = (unsigned long)base;
+	timer8_priv.mapbase = base;
 
 	rate = clk_get_rate(clk) / SCALE;
 	if (!rate) {
diff --git a/drivers/clocksource/h8300_tpu.c b/drivers/clocksource/h8300_tpu.c
index c1eef42..91bf1992 100644
--- a/drivers/clocksource/h8300_tpu.c
+++ b/drivers/clocksource/h8300_tpu.c
@@ -21,8 +21,8 @@
 
 struct tpu_priv {
 	struct clocksource cs;
-	unsigned long mapbase1;
-	unsigned long mapbase2;
+	void __iomem *mapbase1;
+	void __iomem *mapbase2;
 	raw_spinlock_t lock;
 	unsigned int cs_enabled;
 };
@@ -31,8 +31,8 @@ static inline unsigned long read_tcnt32(struct tpu_priv *p)
 {
 	unsigned long tcnt;
 
-	tcnt = ctrl_inw(p->mapbase1 + TCNT) << 16;
-	tcnt |= ctrl_inw(p->mapbase2 + TCNT);
+	tcnt = readw(p->mapbase1 + TCNT) << 16;
+	tcnt |= readw(p->mapbase2 + TCNT);
 	return tcnt;
 }
 
@@ -41,7 +41,7 @@ static int tpu_get_counter(struct tpu_priv *p, unsigned long long *val)
 	unsigned long v1, v2, v3;
 	int o1, o2;
 
-	o1 = ctrl_inb(p->mapbase1 + TSR) & 0x10;
+	o1 = readb(p->mapbase1 + TSR) & 0x10;
 
 	/* Make sure the timer value is stable. Stolen from acpi_pm.c */
 	do {
@@ -49,7 +49,7 @@ static int tpu_get_counter(struct tpu_priv *p, unsigned long long *val)
 		v1 = read_tcnt32(p);
 		v2 = read_tcnt32(p);
 		v3 = read_tcnt32(p);
-		o1 = ctrl_inb(p->mapbase1 + TSR) & 0x10;
+		o1 = readb(p->mapbase1 + TSR) & 0x10;
 	} while (unlikely((o1 != o2) || (v1 > v2 && v1 < v3)
 			  || (v2 > v3 && v2 < v1) || (v3 > v1 && v3 < v2)));
 
@@ -82,10 +82,10 @@ static int tpu_clocksource_enable(struct clocksource *cs)
 
 	WARN_ON(p->cs_enabled);
 
-	ctrl_outw(0, p->mapbase1 + TCNT);
-	ctrl_outw(0, p->mapbase2 + TCNT);
-	ctrl_outb(0x0f, p->mapbase1 + TCR);
-	ctrl_outb(0x03, p->mapbase2 + TCR);
+	writew(0, p->mapbase1 + TCNT);
+	writew(0, p->mapbase2 + TCNT);
+	writeb(0x0f, p->mapbase1 + TCR);
+	writeb(0x03, p->mapbase2 + TCR);
 
 	p->cs_enabled = true;
 	return 0;
@@ -97,8 +97,8 @@ static void tpu_clocksource_disable(struct clocksource *cs)
 
 	WARN_ON(!p->cs_enabled);
 
-	ctrl_outb(0, p->mapbase1 + TCR);
-	ctrl_outb(0, p->mapbase2 + TCR);
+	writeb(0, p->mapbase1 + TCR);
+	writeb(0, p->mapbase2 + TCR);
 	p->cs_enabled = false;
 }
 
@@ -139,8 +139,8 @@ static void __init h8300_tpu_init(struct device_node *node)
 		goto unmap_L;
 	}
 
-	tpu_priv.mapbase1 = (unsigned long)base[CH_L];
-	tpu_priv.mapbase2 = (unsigned long)base[CH_H];
+	tpu_priv.mapbase1 = base[CH_L];
+	tpu_priv.mapbase2 = base[CH_H];
 
 	clocksource_register_hz(&tpu_priv.cs, clk_get_rate(clk) / 64);
 
diff --git a/drivers/irqchip/irq-renesas-h8300h.c b/drivers/irqchip/irq-renesas-h8300h.c
index 6fd30d5..c378768 100644
--- a/drivers/irqchip/irq-renesas-h8300h.c
+++ b/drivers/irqchip/irq-renesas-h8300h.c
@@ -21,9 +21,9 @@ static const char ipr_bit[] = {
 	10, 10, 10, 10,  9,  9,  9,  9,
 };
 
-static void *intc_baseaddr;
+static void __iomem *intc_baseaddr;
 
-#define IPR ((unsigned long)intc_baseaddr + 6)
+#define IPR (intc_baseaddr + 6)
 
 static void h8300h_disable_irq(struct irq_data *data)
 {
@@ -81,8 +81,8 @@ static int __init h8300h_intc_of_init(struct device_node *intc,
 	BUG_ON(!intc_baseaddr);
 
 	/* All interrupt priority low */
-	ctrl_outb(0x00, IPR + 0);
-	ctrl_outb(0x00, IPR + 1);
+	writeb(0x00, IPR + 0);
+	writeb(0x00, IPR + 1);
 
 	domain = irq_domain_add_linear(intc, NR_IRQS, &irq_ops, NULL);
 	BUG_ON(!domain);
