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+/* arch/arm/plat-samsung/adc.c
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+ *
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+ * Copyright (c) 2008 Simtec Electronics
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+ * http://armlinux.simtec.co.uk/
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+ * Ben Dooks <ben@simtec.co.uk>, <ben-linux@fluff.org>
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+ *
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+ * Samsung ADC device core
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License.
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+*/
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+
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+#include <linux/module.h>
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+#include <linux/kernel.h>
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+#include <linux/platform_device.h>
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+#include <linux/sched.h>
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+#include <linux/list.h>
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+#include <linux/slab.h>
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+#include <linux/err.h>
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+#include <linux/clk.h>
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+#include <linux/interrupt.h>
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+#include <linux/io.h>
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+#include <linux/regulator/consumer.h>
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+
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+#include <plat/regs-adc.h>
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+#include <plat/adc.h>
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+
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+/* This driver is designed to control the usage of the ADC block between
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+ * the touchscreen and any other drivers that may need to use it, such as
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+ * the hwmon driver.
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+ *
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+ * Priority will be given to the touchscreen driver, but as this itself is
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+ * rate limited it should not starve other requests which are processed in
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+ * order that they are received.
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+ *
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+ * Each user registers to get a client block which uniquely identifies it
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+ * and stores information such as the necessary functions to callback when
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+ * action is required.
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+ */
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+
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+enum s3c_cpu_type {
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+ TYPE_ADCV1, /* S3C24XX */
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+ TYPE_ADCV11, /* S3C2443 */
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+ TYPE_ADCV12, /* S3C2416, S3C2450 */
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+ TYPE_ADCV2, /* S3C64XX, S5P64X0, S5PC100 */
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+ TYPE_ADCV3, /* S5PV210, S5PC110, EXYNOS4210 */
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+};
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+
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+struct s3c_adc_client {
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+ struct platform_device *pdev;
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+ struct list_head pend;
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+ wait_queue_head_t *wait;
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+
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+ unsigned int nr_samples;
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+ int result;
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+ unsigned char is_ts;
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+ unsigned char channel;
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+
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+ void (*select_cb)(struct s3c_adc_client *c, unsigned selected);
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+ void (*convert_cb)(struct s3c_adc_client *c,
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+ unsigned val1, unsigned val2,
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+ unsigned *samples_left);
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+};
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+
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+struct adc_device {
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+ struct platform_device *pdev;
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+ struct platform_device *owner;
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+ struct clk *clk;
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+ struct s3c_adc_client *cur;
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+ struct s3c_adc_client *ts_pend;
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+ void __iomem *regs;
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+ spinlock_t lock;
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+
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+ unsigned int prescale;
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+
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+ int irq;
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+ struct regulator *vdd;
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+};
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+
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+static struct adc_device *adc_dev;
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+
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+static LIST_HEAD(adc_pending); /* protected by adc_device.lock */
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+
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+#define adc_dbg(_adc, msg...) dev_dbg(&(_adc)->pdev->dev, msg)
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+
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李欣儒