sh: intc - convert voyagergx code

This patch converts the sh-specific voyagergx interrupt code to make use
of intc. A lot of "interesting" old cruft gets replaced with intc tables
and some simple demux code.

- All interrupt sources in the sm501 data sheet are now in the header.
- The number and order of IRQ values are disconnected from register bits.
- Interrupt sources now start from IRQ 200.
- set_irq_chained_handler() is now used to hook up the demux function.

In the future it would probably make sense to move the interrupt demuxer
into into the mfd driver, but this is probably a nice step in the right
direction until that happens.

Tested on a R2D-1 board using the serial port hooked up to the sm501.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

2 files changed, 4 insertions, 7 deletions

diff --git a/arch/sh/boards/renesas/rts7751r2d/irq.c b/arch/sh/boards/renesas/rts7751r2d/irq.c
index 0bae9041aceb..b97c25de3a41 100644
--- a/arch/sh/boards/renesas/rts7751r2d/irq.c
+++ b/arch/sh/boards/renesas/rts7751r2d/irq.c
@@ -13,6 +13,7 @@
 #include <linux/irq.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
+#include <asm/voyagergx.h>
 #include <asm/rts7751r2d.h>
 
 #if defined(CONFIG_RTS7751R2D_REV11)
@@ -21,9 +22,6 @@ static int mask_pos[] = {11, 9, 8, 12, 10, 6, 5, 4, 7, 14, 13, 0, 0, 0, 0};
 static int mask_pos[] = {6, 11, 9, 8, 12, 10, 5, 4, 7, 14, 13, 0, 0, 0, 0};
 #endif
 
-extern int voyagergx_irq_demux(int irq);
-extern void setup_voyagergx_irq(void);
-
 static void enable_rts7751r2d_irq(unsigned int irq)
 {
         /* Set priority in IPR back to original value */
@@ -39,7 +37,7 @@ static void disable_rts7751r2d_irq(unsigned int irq)
 
 int rts7751r2d_irq_demux(int irq)
 {
-        return voyagergx_irq_demux(irq);
+        return irq;
 }
 
 static struct irq_chip rts7751r2d_irq_chip __read_mostly = {
diff --git a/arch/sh/boards/renesas/rts7751r2d/setup.c b/arch/sh/boards/renesas/rts7751r2d/setup.c
index 6f7029d33241..4d1bbd30e52b 100644
--- a/arch/sh/boards/renesas/rts7751r2d/setup.c
+++ b/arch/sh/boards/renesas/rts7751r2d/setup.c
@@ -82,7 +82,7 @@ static struct plat_serial8250_port uart_platform_data[] = {
                 .membase        = (void __iomem *)VOYAGER_UART_BASE,
                 .mapbase        = VOYAGER_UART_BASE,
                 .iotype         = UPIO_MEM,
-                .irq            = VOYAGER_UART0_IRQ,
+                .irq            = IRQ_SM501_U0,
                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
                 .regshift       = 2,
                 .uartclk        = (9600 * 16),
@@ -125,7 +125,7 @@ static struct resource sm501_resources[] = {
                 .flags  = IORESOURCE_MEM,
         },
         [2]     = {
-                .start  = 32,
+                .start  = IRQ_SM501_CV,
                 .flags  = IORESOURCE_IRQ,
         },
 };
@@ -187,7 +187,6 @@ static void __init rts7751r2d_setup(char **cmdline_p)
 static struct sh_machine_vector mv_rts7751r2d __initmv = {
         .mv_name                = "RTS7751R2D",
         .mv_setup               = rts7751r2d_setup,
-        .mv_nr_irqs             = 72,
 
         .mv_init_irq            = init_rts7751r2d_IRQ,
         .mv_irq_demux           = rts7751r2d_irq_demux,