ARM: S3C64XX: Add S3C64XX support to the generic Samsung ADC driver

Add S3C64XX support to the generic Samsung ADC driver

Signed-off-by: Maurus Cuelenaere <mcuelenaere@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

arch/arm/mach-s3c6400/include/mach/map.h

@@ -42,6 +42,7 @@
 #define S3C64XX_PA_FB		(0x77100000)
 #define S3C64XX_PA_USB_HSOTG	(0x7C000000)
 #define S3C64XX_PA_WATCHDOG	(0x7E004000)
+#define S3C64XX_PA_ADC		(0x7E00B000)
 #define S3C64XX_PA_SYSCON	(0x7E00F000)
 #define S3C64XX_PA_AC97		(0x7F001000)
 #define S3C64XX_PA_IIS0		(0x7F002000)

arch/arm/plat-s3c/include/plat/regs-adc.h

@@ -19,6 +19,9 @@
 #define S3C2410_ADCDLY	   S3C2410_ADCREG(0x08)
 #define S3C2410_ADCDAT0	   S3C2410_ADCREG(0x0C)
 #define S3C2410_ADCDAT1	   S3C2410_ADCREG(0x10)
+#define S3C64XX_ADCUPDN		S3C2410_ADCREG(0x14)
+#define S3C64XX_ADCCLRINT	S3C2410_ADCREG(0x18)
+#define S3C64XX_ADCCLRINTPNDNUP	S3C2410_ADCREG(0x20)
 
 
 /* ADCCON Register Bits */

arch/arm/plat-s3c64xx/Makefile

@@ -35,6 +35,10 @@ obj-$(CONFIG_PM)		+= irq-pm.o
 
 obj-$(CONFIG_S3C64XX_DMA)	+= dma.o
 
+# ADC support
+
+obj-$(CONFIG_S3C_ADC)		+= dev-adc.o
+
 # Device setup
 
 obj-$(CONFIG_S3C64XX_SETUP_I2C0) += setup-i2c0.o

arch/arm/plat-s3c64xx/dev-adc.c

@@ -0,0 +1,46 @@
+/* linux/arch/arm/plat-s3c64xx/dev-adc.c
+ *
+ * Copyright 2010 Maurus Cuelenaere
+ *
+ * S3C64xx series device definition for ADC device
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/platform_device.h>
+
+#include <mach/irqs.h>
+#include <mach/map.h>
+
+#include <plat/adc.h>
+#include <plat/devs.h>
+#include <plat/cpu.h>
+
+static struct resource s3c_adc_resource[] = {
+	[0] = {
+		.start = S3C64XX_PA_ADC,
+		.end   = S3C64XX_PA_ADC + SZ_256 - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = IRQ_TC,
+		.end   = IRQ_TC,
+		.flags = IORESOURCE_IRQ,
+	},
+	[2] = {
+		.start = IRQ_ADC,
+		.end   = IRQ_ADC,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+struct platform_device s3c_device_adc = {
+	.name		= "s3c64xx-adc",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(s3c_adc_resource),
+	.resource	= s3c_adc_resource,
+};

arch/arm/plat-samsung/adc.c

@@ -37,6 +37,11 @@
  * action is required.
  */
 
+enum s3c_cpu_type {
+	TYPE_S3C24XX,
+	TYPE_S3C64XX
+};
+
 struct s3c_adc_client {
 	struct platform_device	*pdev;
 	struct list_head	 pend;
@@ -262,7 +267,7 @@ static irqreturn_t s3c_adc_irq(int irq, void *pw)
 
 	if (!client) {
 		dev_warn(&adc->pdev->dev, "%s: no adc pending\n", __func__);
-		return IRQ_HANDLED;
+		goto exit;
 	}
 
 	data0 = readl(adc->regs + S3C2410_ADCDAT0);
@@ -289,6 +294,11 @@ static irqreturn_t s3c_adc_irq(int irq, void *pw)
 		local_irq_restore(flags);
 	}
 
+exit:
+	if (platform_get_device_id(client->pdev)->driver_data == TYPE_S3C64XX) {
+		/* Clear ADC interrupt */
+		writel(0, adc->regs + S3C64XX_ADCCLRINT);
+	}
 	return IRQ_HANDLED;
 }
 
@@ -410,9 +420,22 @@ static int s3c_adc_resume(struct platform_device *pdev)
 #define s3c_adc_resume NULL
 #endif
 
+static struct platform_device_id s3c_adc_driver_ids[] = {
+	{
+		.name           = "s3c24xx-adc",
+		.driver_data    = TYPE_S3C24XX,
+	}, {
+		.name           = "s3c64xx-adc",
+		.driver_data    = TYPE_S3C64XX,
+	},
+	{ }
+};
+MODULE_DEVICE_TABLE(platform, s3c_adc_driver_ids);
+
 static struct platform_driver s3c_adc_driver = {
+	.id_table	= s3c_adc_driver_ids,
 	.driver		= {
-		.name	= "s3c24xx-adc",
+		.name	= "s3c-adc",
 		.owner	= THIS_MODULE,
 	},
 	.probe		= s3c_adc_probe,