[ARM] 3451/1: ep93xx: use the m48t86 rtc driver on the ts72xx platform

Patch from Lennert Buytenhek

Instantiate the recently merged m48t86 rtc driver in the ts72xx code.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-ep93xx/ts72xx.c

@@ -17,6 +17,8 @@
 #include <linux/sched.h>
 #include <linux/interrupt.h>
 #include <linux/mtd/physmap.h>
+#include <linux/platform_device.h>
+#include <linux/m48t86.h>
 #include <asm/io.h>
 #include <asm/hardware.h>
 #include <asm/mach-types.h>
@@ -39,6 +41,16 @@ static struct map_desc ts72xx_io_desc[] __initdata = {
 		.pfn		= __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
 		.length		= TS72XX_OPTIONS2_SIZE,
 		.type		= MT_DEVICE,
+	}, {
+		.virtual	= TS72XX_RTC_INDEX_VIRT_BASE,
+		.pfn		= __phys_to_pfn(TS72XX_RTC_INDEX_PHYS_BASE),
+		.length		= TS72XX_RTC_INDEX_SIZE,
+		.type		= MT_DEVICE,
+	}, {
+		.virtual	= TS72XX_RTC_DATA_VIRT_BASE,
+		.pfn		= __phys_to_pfn(TS72XX_RTC_DATA_PHYS_BASE),
+		.length		= TS72XX_RTC_DATA_SIZE,
+		.type		= MT_DEVICE,
 	}
 };
 
@@ -99,11 +111,38 @@ static void __init ts72xx_map_io(void)
 	}
 }
 
+static unsigned char ts72xx_rtc_readb(unsigned long addr)
+{
+	__raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
+	return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE);
+}
+
+static void ts72xx_rtc_writeb(unsigned char value, unsigned long addr)
+{
+	__raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
+	__raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE);
+}
+
+static struct m48t86_ops ts72xx_rtc_ops = {
+	.readb			= ts72xx_rtc_readb,
+	.writeb			= ts72xx_rtc_writeb,
+};
+
+static struct platform_device ts72xx_rtc_device = {
+	.name			= "rtc-m48t86",
+	.id			= -1,
+	.dev			= {
+		.platform_data		= &ts72xx_rtc_ops,
+	},
+	.num_resources		= 0,
+};
+
 static void __init ts72xx_init_machine(void)
 {
 	ep93xx_init_devices();
 	if (board_is_ts7200())
 		physmap_configure(TS72XX_NOR_PHYS_BASE, 0x01000000, 1, NULL);
+	platform_device_register(&ts72xx_rtc_device);
 }
 
 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")

include/asm-arm/arch-ep93xx/ts72xx.h

@@ -12,6 +12,8 @@
  * febfc000	[67]0000000	4K	NAND data register
  * febfb000	[67]0400000	4K	NAND control register
  * febfa000	[67]0800000	4K	NAND busy register
+ * febf9000	10800000	4K	TS-5620 RTC index register
+ * febf8000	11700000	4K	TS-5620 RTC data register
  */
 
 #define TS72XX_MODEL_PHYS_BASE		0x22000000
@@ -58,6 +60,15 @@
 #define TS72XX_NAND_BUSY_SIZE		0x00001000
 
 
+#define TS72XX_RTC_INDEX_VIRT_BASE	0xfebf9000
+#define TS72XX_RTC_INDEX_PHYS_BASE	0x10800000
+#define TS72XX_RTC_INDEX_SIZE		0x00001000
+
+#define TS72XX_RTC_DATA_VIRT_BASE	0xfebf8000
+#define TS72XX_RTC_DATA_PHYS_BASE	0x11700000
+#define TS72XX_RTC_DATA_SIZE		0x00001000
+
+
 #ifndef __ASSEMBLY__
 #include <asm/io.h>