[PATCH] ARM: 2832/1: BAST - limit clock-rate for IIC bus

[deliverable/linux.git] / arch / arm / mach-s3c2410 / mach-bast.c

diff --git a/arch/arm/mach-s3c2410/mach-bast.c b/arch/arm/mach-s3c2410/mach-bast.c
index ccb6bcefa46c5e265815d24f7f2afa00dfcff7c1..e9182242da95be91ebe9dfc5f389c0a3318d8a5e 100644 (file)
--- a/arch/arm/mach-s3c2410/mach-bast.c
+++ b/arch/arm/mach-s3c2410/mach-bast.c
@@ -25,9 +25,12 @@
  *     14-Jan-2005 BJD  Add support for muitlple NAND devices
  *     03-Mar-2005 BJD  Ensured that bast-cpld.h is included
  *     10-Mar-2005 LCVR Changed S3C2410_VA to S3C24XX_VA
- *     14-Mar-2006 BJD  Updated for __iomem changes
- *     22-Jun-2006 BJD  Added DM9000 platform information
- *     28-Jun-2006 BJD  Moved pm functionality out to common code
+ *     14-Mar-2005 BJD  Updated for __iomem changes
+ *     22-Jun-2005 BJD  Added DM9000 platform information
+ *     28-Jun-2005 BJD  Moved pm functionality out to common code
+ *     17-Jul-2005 BJD  Changed to platform device for SuperIO 16550s
+ *     25-Jul-2005 BJD  Removed ASIX static mappings
+ *     27-Jul-2005 BJD  Ensure maximum frequency of i2c bus
 */
 
 #include <linux/kernel.h>
@@ -58,12 +61,15 @@
 #include <asm/arch/regs-mem.h>
 #include <asm/arch/regs-lcd.h>
 #include <asm/arch/nand.h>
+#include <asm/arch/iic.h>
 
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/nand.h>
 #include <linux/mtd/nand_ecc.h>
 #include <linux/mtd/partitions.h>
 
+#include <linux/serial_8250.h>
+
 #include "clock.h"
 #include "devs.h"
 #include "cpu.h"
@@ -113,7 +119,6 @@ static struct map_desc bast_iodesc[] __initdata = {
   /* slow, byte */
   { VA_C2(BAST_VA_ISAIO),   PA_CS2(BAST_PA_ISAIO),    SZ_16M, MT_DEVICE },
   { VA_C2(BAST_VA_ISAMEM),  PA_CS2(BAST_PA_ISAMEM),   SZ_16M, MT_DEVICE },
-  { VA_C2(BAST_VA_ASIXNET), PA_CS3(BAST_PA_ASIXNET),  SZ_1M,  MT_DEVICE },
   { VA_C2(BAST_VA_SUPERIO), PA_CS2(BAST_PA_SUPERIO),  SZ_1M,  MT_DEVICE },
   { VA_C2(BAST_VA_IDEPRI),  PA_CS3(BAST_PA_IDEPRI),   SZ_1M,  MT_DEVICE },
   { VA_C2(BAST_VA_IDESEC),  PA_CS3(BAST_PA_IDESEC),   SZ_1M,  MT_DEVICE },
@@ -123,7 +128,6 @@ static struct map_desc bast_iodesc[] __initdata = {
   /* slow, word */
   { VA_C3(BAST_VA_ISAIO),   PA_CS3(BAST_PA_ISAIO),    SZ_16M, MT_DEVICE },
   { VA_C3(BAST_VA_ISAMEM),  PA_CS3(BAST_PA_ISAMEM),   SZ_16M, MT_DEVICE },
-  { VA_C3(BAST_VA_ASIXNET), PA_CS3(BAST_PA_ASIXNET),  SZ_1M,  MT_DEVICE },
   { VA_C3(BAST_VA_SUPERIO), PA_CS3(BAST_PA_SUPERIO),  SZ_1M,  MT_DEVICE },
   { VA_C3(BAST_VA_IDEPRI),  PA_CS3(BAST_PA_IDEPRI),   SZ_1M,  MT_DEVICE },
   { VA_C3(BAST_VA_IDESEC),  PA_CS3(BAST_PA_IDESEC),   SZ_1M,  MT_DEVICE },
@@ -133,7 +137,6 @@ static struct map_desc bast_iodesc[] __initdata = {
   /* fast, byte */
   { VA_C4(BAST_VA_ISAIO),   PA_CS4(BAST_PA_ISAIO),    SZ_16M, MT_DEVICE },
   { VA_C4(BAST_VA_ISAMEM),  PA_CS4(BAST_PA_ISAMEM),   SZ_16M, MT_DEVICE },
-  { VA_C4(BAST_VA_ASIXNET), PA_CS5(BAST_PA_ASIXNET),  SZ_1M,  MT_DEVICE },
   { VA_C4(BAST_VA_SUPERIO), PA_CS4(BAST_PA_SUPERIO),  SZ_1M,  MT_DEVICE },
   { VA_C4(BAST_VA_IDEPRI),  PA_CS5(BAST_PA_IDEPRI),   SZ_1M,  MT_DEVICE },
   { VA_C4(BAST_VA_IDESEC),  PA_CS5(BAST_PA_IDESEC),   SZ_1M,  MT_DEVICE },
@@ -143,7 +146,6 @@ static struct map_desc bast_iodesc[] __initdata = {
   /* fast, word */
   { VA_C5(BAST_VA_ISAIO),   PA_CS5(BAST_PA_ISAIO),    SZ_16M, MT_DEVICE },
   { VA_C5(BAST_VA_ISAMEM),  PA_CS5(BAST_PA_ISAMEM),   SZ_16M, MT_DEVICE },
-  { VA_C5(BAST_VA_ASIXNET), PA_CS5(BAST_PA_ASIXNET),  SZ_1M,  MT_DEVICE },
   { VA_C5(BAST_VA_SUPERIO), PA_CS5(BAST_PA_SUPERIO),  SZ_1M,  MT_DEVICE },
   { VA_C5(BAST_VA_IDEPRI),  PA_CS5(BAST_PA_IDEPRI),   SZ_1M,  MT_DEVICE },
   { VA_C5(BAST_VA_IDESEC),  PA_CS5(BAST_PA_IDESEC),   SZ_1M,  MT_DEVICE },
@@ -304,7 +306,7 @@ static void bast_nand_select(struct s3c2410_nand_set *set, int slot)
 }
 
 static struct s3c2410_platform_nand bast_nand_info = {
-       .tacls          = 80,
+       .tacls          = 40,
        .twrph0         = 80,
        .twrph1         = 80,
        .nr_sets        = ARRAY_SIZE(bast_nand_sets),
@@ -351,6 +353,50 @@ static struct platform_device bast_device_dm9k = {
        }
 };
 
+/* serial devices */
+
+#define SERIAL_BASE  (S3C2410_CS2 + BAST_PA_SUPERIO)
+#define SERIAL_FLAGS (UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SHARE_IRQ)
+#define SERIAL_CLK   (1843200)
+
+static struct plat_serial8250_port bast_sio_data[] = {
+       [0] = {
+               .mapbase        = SERIAL_BASE + 0x2f8,
+               .irq            = IRQ_PCSERIAL1,
+               .flags          = SERIAL_FLAGS,
+               .iotype         = UPIO_MEM,
+               .regshift       = 0,
+               .uartclk        = SERIAL_CLK,
+       },
+       [1] = {
+               .mapbase        = SERIAL_BASE + 0x3f8,
+               .irq            = IRQ_PCSERIAL2,
+               .flags          = SERIAL_FLAGS,
+               .iotype         = UPIO_MEM,
+               .regshift       = 0,
+               .uartclk        = SERIAL_CLK,
+       },
+       { }
+};
+
+static struct platform_device bast_sio = {
+       .name                   = "serial8250",
+       .id                     = 0,
+       .dev                    = {
+               .platform_data  = &bast_sio_data,
+       },
+};
+
+/* we have devices on the bus which cannot work much over the
+ * standard 100KHz i2c bus frequency
+*/
+
+static struct s3c2410_platform_i2c bast_i2c_info = {
+       .flags          = 0,
+       .slave_addr     = 0x10,
+       .bus_freq       = 100*1000,
+       .max_freq       = 130*1000,
+};
 
 /* Standard BAST devices */
 
@@ -364,6 +410,7 @@ static struct platform_device *bast_devices[] __initdata = {
        &s3c_device_nand,
        &bast_device_nor,
        &bast_device_dm9k,
+       &bast_sio,
 };
 
 static struct clk *bast_clocks[] = {
@@ -397,6 +444,7 @@ void __init bast_map_io(void)
        s3c24xx_uclk.parent  = &s3c24xx_clkout1;
 
        s3c_device_nand.dev.platform_data = &bast_nand_info;
+       s3c_device_i2c.dev.platform_data = &bast_i2c_info;
 
        s3c24xx_init_io(bast_iodesc, ARRAY_SIZE(bast_iodesc));
        s3c24xx_init_clocks(0);