ARM: s3c: remove adc.c

This driver could not be enabled on s3c64xx for a long time
because of the ARCH_MULTIPLATFORM dependency, so remove it.

Acked-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

6 files changed, 0 insertions, 595 deletions

diff --git a/arch/arm/mach-s3c/Kconfig b/arch/arm/mach-s3c/Kconfig
index 809f84fca0b8..0dde4010aa64 100644
--- a/arch/arm/mach-s3c/Kconfig
+++ b/arch/arm/mach-s3c/Kconfig
@@ -63,16 +63,6 @@ config S3C_GPIO_TRACK
 	  Internal configuration option to enable the s3c specific gpio
 	  chip tracking if the platform requires it.
 
-# ADC driver
-
-config S3C_ADC
-	bool "ADC common driver support"
-	depends on !ARCH_MULTIPLATFORM
-	help
-	  Core support for the ADC block found in the Samsung SoC systems
-	  for drivers such as the touchscreen and hwmon to use to share
-	  this resource.
-
 # device definitions to compile in
 
 config S3C_DEV_HSMMC
@@ -165,11 +155,6 @@ config S3C_DEV_RTC
 	help
 	  Compile in platform device definition for RTC
 
-config SAMSUNG_DEV_ADC
-	bool
-	help
-	  Compile in platform device definition for ADC controller
-
 config S3C64XX_DEV_SPI0
 	bool
 	help
diff --git a/arch/arm/mach-s3c/Kconfig.s3c64xx b/arch/arm/mach-s3c/Kconfig.s3c64xx
index 0da214c43fba..c403d7642f0a 100644
--- a/arch/arm/mach-s3c/Kconfig.s3c64xx
+++ b/arch/arm/mach-s3c/Kconfig.s3c64xx
@@ -125,7 +125,6 @@ config MACH_WLF_CRAGG_6410
 	select S3C_DEV_USB_HOST
 	select S3C_DEV_USB_HSOTG
 	select S3C_DEV_WDT
-	select SAMSUNG_DEV_ADC
 	select SAMSUNG_DEV_KEYPAD
 	select SAMSUNG_DEV_PWM
 	help
diff --git a/arch/arm/mach-s3c/Makefile b/arch/arm/mach-s3c/Makefile
index a5135137e648..bae7316be5c7 100644
--- a/arch/arm/mach-s3c/Makefile
+++ b/arch/arm/mach-s3c/Makefile
@@ -8,10 +8,6 @@ include $(src)/Makefile.s3c64xx
 
 obj-y				+= init.o cpu.o
 
-# ADC
-
-obj-$(CONFIG_S3C_ADC)	+= adc.o
-
 # devices
 
 obj-$(CONFIG_SAMSUNG_ATAGS)	+= platformdata.o
diff --git a/arch/arm/mach-s3c/adc.c b/arch/arm/mach-s3c/adc.c
deleted file mode 100644
index 0232520d3c13..000000000000
--- a/arch/arm/mach-s3c/adc.c
+++ /dev/null
@@ -1,510 +0,0 @@
-// SPDX-License-Identifier: GPL-1.0+
-//
-// Copyright (c) 2008 Simtec Electronics
-//	http://armlinux.simtec.co.uk/
-//	Ben Dooks <ben@simtec.co.uk>, <ben-linux@fluff.org>
-//
-// Samsung ADC device core
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/mod_devicetable.h>
-#include <linux/platform_device.h>
-#include <linux/sched.h>
-#include <linux/list.h>
-#include <linux/slab.h>
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/regulator/consumer.h>
-
-#include "regs-adc.h"
-#include <linux/soc/samsung/s3c-adc.h>
-
-/* This driver is designed to control the usage of the ADC block between
- * the touchscreen and any other drivers that may need to use it, such as
- * the hwmon driver.
- *
- * Priority will be given to the touchscreen driver, but as this itself is
- * rate limited it should not starve other requests which are processed in
- * order that they are received.
- *
- * Each user registers to get a client block which uniquely identifies it
- * and stores information such as the necessary functions to callback when
- * action is required.
- */
-
-enum s3c_cpu_type {
-	TYPE_ADCV1, /* S3C24XX */
-	TYPE_ADCV11, /* S3C2443 */
-	TYPE_ADCV12, /* S3C2416, S3C2450 */
-	TYPE_ADCV2, /* S3C64XX */
-	TYPE_ADCV3, /* S5PV210, S5PC110, Exynos4210 */
-};
-
-struct s3c_adc_client {
-	struct platform_device	*pdev;
-	struct list_head	 pend;
-	wait_queue_head_t	*wait;
-
-	unsigned int		 nr_samples;
-	int			 result;
-	unsigned char		 is_ts;
-	unsigned char		 channel;
-
-	void	(*select_cb)(struct s3c_adc_client *c, unsigned selected);
-	void	(*convert_cb)(struct s3c_adc_client *c,
-			      unsigned val1, unsigned val2,
-			      unsigned *samples_left);
-};
-
-struct adc_device {
-	struct platform_device	*pdev;
-	struct platform_device	*owner;
-	struct clk		*clk;
-	struct s3c_adc_client	*cur;
-	struct s3c_adc_client	*ts_pend;
-	void __iomem		*regs;
-	spinlock_t		 lock;
-
-	unsigned int		 prescale;
-
-	int			 irq;
-	struct regulator	*vdd;
-};
-
-static struct adc_device *adc_dev;
-
-static LIST_HEAD(adc_pending);	/* protected by adc_device.lock */
-
-#define adc_dbg(_adc, msg...) dev_dbg(&(_adc)->pdev->dev, msg)
-
-static inline void s3c_adc_convert(struct adc_device *adc)
-{
-	unsigned con = readl(adc->regs + S3C2410_ADCCON);
-
-	con |= S3C2410_ADCCON_ENABLE_START;
-	writel(con, adc->regs + S3C2410_ADCCON);
-}
-
-static inline void s3c_adc_select(struct adc_device *adc,
-				  struct s3c_adc_client *client)
-{
-	unsigned con = readl(adc->regs + S3C2410_ADCCON);
-	enum s3c_cpu_type cpu = platform_get_device_id(adc->pdev)->driver_data;
-
-	client->select_cb(client, 1);
-
-	if (cpu == TYPE_ADCV1 || cpu == TYPE_ADCV2)
-		con &= ~S3C2410_ADCCON_MUXMASK;
-	con &= ~S3C2410_ADCCON_STDBM;
-	con &= ~S3C2410_ADCCON_STARTMASK;
-
-	if (!client->is_ts) {
-		if (cpu == TYPE_ADCV3)
-			writel(client->channel & 0xf, adc->regs + S5P_ADCMUX);
-		else if (cpu == TYPE_ADCV11 || cpu == TYPE_ADCV12)
-			writel(client->channel & 0xf,
-						adc->regs + S3C2443_ADCMUX);
-		else
-			con |= S3C2410_ADCCON_SELMUX(client->channel);
-	}
-
-	writel(con, adc->regs + S3C2410_ADCCON);
-}
-
-static void s3c_adc_dbgshow(struct adc_device *adc)
-{
-	adc_dbg(adc, "CON=%08x, TSC=%08x, DLY=%08x\n",
-		readl(adc->regs + S3C2410_ADCCON),
-		readl(adc->regs + S3C2410_ADCTSC),
-		readl(adc->regs + S3C2410_ADCDLY));
-}
-
-static void s3c_adc_try(struct adc_device *adc)
-{
-	struct s3c_adc_client *next = adc->ts_pend;
-
-	if (!next && !list_empty(&adc_pending)) {
-		next = list_first_entry(&adc_pending,
-					struct s3c_adc_client, pend);
-		list_del(&next->pend);
-	} else
-		adc->ts_pend = NULL;
-
-	if (next) {
-		adc_dbg(adc, "new client is %p\n", next);
-		adc->cur = next;
-		s3c_adc_select(adc, next);
-		s3c_adc_convert(adc);
-		s3c_adc_dbgshow(adc);
-	}
-}
-
-int s3c_adc_start(struct s3c_adc_client *client,
-		  unsigned int channel, unsigned int nr_samples)
-{
-	struct adc_device *adc = adc_dev;
-	unsigned long flags;
-
-	if (!adc) {
-		printk(KERN_ERR "%s: failed to find adc\n", __func__);
-		return -EINVAL;
-	}
-
-	spin_lock_irqsave(&adc->lock, flags);
-
-	if (client->is_ts && adc->ts_pend) {
-		spin_unlock_irqrestore(&adc->lock, flags);
-		return -EAGAIN;
-	}
-
-	client->channel = channel;
-	client->nr_samples = nr_samples;
-
-	if (client->is_ts)
-		adc->ts_pend = client;
-	else
-		list_add_tail(&client->pend, &adc_pending);
-
-	if (!adc->cur)
-		s3c_adc_try(adc);
-
-	spin_unlock_irqrestore(&adc->lock, flags);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(s3c_adc_start);
-
-static void s3c_convert_done(struct s3c_adc_client *client,
-			     unsigned v, unsigned u, unsigned *left)
-{
-	client->result = v;
-	wake_up(client->wait);
-}
-
-int s3c_adc_read(struct s3c_adc_client *client, unsigned int ch)
-{
-	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wake);
-	int ret;
-
-	client->convert_cb = s3c_convert_done;
-	client->wait = &wake;
-	client->result = -1;
-
-	ret = s3c_adc_start(client, ch, 1);
-	if (ret < 0)
-		goto err;
-
-	ret = wait_event_timeout(wake, client->result >= 0, HZ / 2);
-	if (client->result < 0) {
-		ret = -ETIMEDOUT;
-		goto err;
-	}
-
-	client->convert_cb = NULL;
-	return client->result;
-
-err:
-	return ret;
-}
-EXPORT_SYMBOL_GPL(s3c_adc_read);
-
-static void s3c_adc_default_select(struct s3c_adc_client *client,
-				   unsigned select)
-{
-}
-
-struct s3c_adc_client *s3c_adc_register(struct platform_device *pdev,
-					void (*select)(struct s3c_adc_client *client,
-						       unsigned int selected),
-					void (*conv)(struct s3c_adc_client *client,
-						     unsigned d0, unsigned d1,
-						     unsigned *samples_left),
-					unsigned int is_ts)
-{
-	struct s3c_adc_client *client;
-
-	WARN_ON(!pdev);
-
-	if (!select)
-		select = s3c_adc_default_select;
-
-	if (!pdev)
-		return ERR_PTR(-EINVAL);
-
-	client = kzalloc(sizeof(*client), GFP_KERNEL);
-	if (!client)
-		return ERR_PTR(-ENOMEM);
-
-	client->pdev = pdev;
-	client->is_ts = is_ts;
-	client->select_cb = select;
-	client->convert_cb = conv;
-
-	return client;
-}
-EXPORT_SYMBOL_GPL(s3c_adc_register);
-
-void s3c_adc_release(struct s3c_adc_client *client)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&adc_dev->lock, flags);
-
-	/* We should really check that nothing is in progress. */
-	if (adc_dev->cur == client)
-		adc_dev->cur = NULL;
-	if (adc_dev->ts_pend == client)
-		adc_dev->ts_pend = NULL;
-	else {
-		struct list_head *p, *n;
-		struct s3c_adc_client *tmp;
-
-		list_for_each_safe(p, n, &adc_pending) {
-			tmp = list_entry(p, struct s3c_adc_client, pend);
-			if (tmp == client)
-				list_del(&tmp->pend);
-		}
-	}
-
-	if (adc_dev->cur == NULL)
-		s3c_adc_try(adc_dev);
-
-	spin_unlock_irqrestore(&adc_dev->lock, flags);
-	kfree(client);
-}
-EXPORT_SYMBOL_GPL(s3c_adc_release);
-
-static irqreturn_t s3c_adc_irq(int irq, void *pw)
-{
-	struct adc_device *adc = pw;
-	struct s3c_adc_client *client = adc->cur;
-	enum s3c_cpu_type cpu = platform_get_device_id(adc->pdev)->driver_data;
-	unsigned data0, data1;
-
-	if (!client) {
-		dev_warn(&adc->pdev->dev, "%s: no adc pending\n", __func__);
-		goto exit;
-	}
-
-	data0 = readl(adc->regs + S3C2410_ADCDAT0);
-	data1 = readl(adc->regs + S3C2410_ADCDAT1);
-	adc_dbg(adc, "read %d: 0x%04x, 0x%04x\n", client->nr_samples, data0, data1);
-
-	client->nr_samples--;
-
-	if (cpu == TYPE_ADCV1 || cpu == TYPE_ADCV11) {
-		data0 &= 0x3ff;
-		data1 &= 0x3ff;
-	} else {
-		/* S3C2416/S3C64XX/S5P ADC resolution is 12-bit */
-		data0 &= 0xfff;
-		data1 &= 0xfff;
-	}
-
-	if (client->convert_cb)
-		(client->convert_cb)(client, data0, data1, &client->nr_samples);
-
-	if (client->nr_samples > 0) {
-		/* fire another conversion for this */
-
-		client->select_cb(client, 1);
-		s3c_adc_convert(adc);
-	} else {
-		spin_lock(&adc->lock);
-		(client->select_cb)(client, 0);
-		adc->cur = NULL;
-
-		s3c_adc_try(adc);
-		spin_unlock(&adc->lock);
-	}
-
-exit:
-	if (cpu == TYPE_ADCV2 || cpu == TYPE_ADCV3) {
-		/* Clear ADC interrupt */
-		writel(0, adc->regs + S3C64XX_ADCCLRINT);
-	}
-	return IRQ_HANDLED;
-}
-
-static int s3c_adc_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct adc_device *adc;
-	enum s3c_cpu_type cpu = platform_get_device_id(pdev)->driver_data;
-	int ret;
-	unsigned tmp;
-
-	adc = devm_kzalloc(dev, sizeof(*adc), GFP_KERNEL);
-	if (!adc)
-		return -ENOMEM;
-
-	spin_lock_init(&adc->lock);
-
-	adc->pdev = pdev;
-	adc->prescale = S3C2410_ADCCON_PRSCVL(49);
-
-	adc->vdd = devm_regulator_get(dev, "vdd");
-	if (IS_ERR(adc->vdd)) {
-		dev_err(dev, "operating without regulator \"vdd\" .\n");
-		return PTR_ERR(adc->vdd);
-	}
-
-	adc->irq = platform_get_irq(pdev, 1);
-	if (adc->irq <= 0)
-		return -ENOENT;
-
-	ret = devm_request_irq(dev, adc->irq, s3c_adc_irq, 0, dev_name(dev),
-				adc);
-	if (ret < 0) {
-		dev_err(dev, "failed to attach adc irq\n");
-		return ret;
-	}
-
-	adc->clk = devm_clk_get(dev, "adc");
-	if (IS_ERR(adc->clk)) {
-		dev_err(dev, "failed to get adc clock\n");
-		return PTR_ERR(adc->clk);
-	}
-
-	adc->regs = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(adc->regs))
-		return PTR_ERR(adc->regs);
-
-	ret = regulator_enable(adc->vdd);
-	if (ret)
-		return ret;
-
-	clk_prepare_enable(adc->clk);
-
-	tmp = adc->prescale | S3C2410_ADCCON_PRSCEN;
-
-	/* Enable 12-bit ADC resolution */
-	if (cpu == TYPE_ADCV12)
-		tmp |= S3C2416_ADCCON_RESSEL;
-	if (cpu == TYPE_ADCV2 || cpu == TYPE_ADCV3)
-		tmp |= S3C64XX_ADCCON_RESSEL;
-
-	writel(tmp, adc->regs + S3C2410_ADCCON);
-
-	dev_info(dev, "attached adc driver\n");
-
-	platform_set_drvdata(pdev, adc);
-	adc_dev = adc;
-
-	return 0;
-}
-
-static int s3c_adc_remove(struct platform_device *pdev)
-{
-	struct adc_device *adc = platform_get_drvdata(pdev);
-
-	clk_disable_unprepare(adc->clk);
-	regulator_disable(adc->vdd);
-
-	return 0;
-}
-
-#ifdef CONFIG_PM
-static int s3c_adc_suspend(struct device *dev)
-{
-	struct adc_device *adc = dev_get_drvdata(dev);
-	unsigned long flags;
-	u32 con;
-
-	spin_lock_irqsave(&adc->lock, flags);
-
-	con = readl(adc->regs + S3C2410_ADCCON);
-	con |= S3C2410_ADCCON_STDBM;
-	writel(con, adc->regs + S3C2410_ADCCON);
-
-	disable_irq(adc->irq);
-	spin_unlock_irqrestore(&adc->lock, flags);
-	clk_disable(adc->clk);
-	regulator_disable(adc->vdd);
-
-	return 0;
-}
-
-static int s3c_adc_resume(struct device *dev)
-{
-	struct platform_device *pdev = to_platform_device(dev);
-	struct adc_device *adc = platform_get_drvdata(pdev);
-	enum s3c_cpu_type cpu = platform_get_device_id(pdev)->driver_data;
-	int ret;
-	unsigned long tmp;
-
-	ret = regulator_enable(adc->vdd);
-	if (ret)
-		return ret;
-	clk_enable(adc->clk);
-	enable_irq(adc->irq);
-
-	tmp = adc->prescale | S3C2410_ADCCON_PRSCEN;
-
-	/* Enable 12-bit ADC resolution */
-	if (cpu == TYPE_ADCV12)
-		tmp |= S3C2416_ADCCON_RESSEL;
-	if (cpu == TYPE_ADCV2 || cpu == TYPE_ADCV3)
-		tmp |= S3C64XX_ADCCON_RESSEL;
-
-	writel(tmp, adc->regs + S3C2410_ADCCON);
-
-	return 0;
-}
-
-#else
-#define s3c_adc_suspend NULL
-#define s3c_adc_resume NULL
-#endif
-
-static const struct platform_device_id s3c_adc_driver_ids[] = {
-	{
-		.name           = "s3c24xx-adc",
-		.driver_data    = TYPE_ADCV1,
-	}, {
-		.name		= "s3c2443-adc",
-		.driver_data	= TYPE_ADCV11,
-	}, {
-		.name		= "s3c2416-adc",
-		.driver_data	= TYPE_ADCV12,
-	}, {
-		.name           = "s3c64xx-adc",
-		.driver_data    = TYPE_ADCV2,
-	}, {
-		.name		= "samsung-adc-v3",
-		.driver_data	= TYPE_ADCV3,
-	},
-	{ }
-};
-MODULE_DEVICE_TABLE(platform, s3c_adc_driver_ids);
-
-static const struct dev_pm_ops adc_pm_ops = {
-	.suspend	= s3c_adc_suspend,
-	.resume		= s3c_adc_resume,
-};
-
-static struct platform_driver s3c_adc_driver = {
-	.id_table	= s3c_adc_driver_ids,
-	.driver		= {
-		.name	= "s3c-adc",
-		.pm	= &adc_pm_ops,
-	},
-	.probe		= s3c_adc_probe,
-	.remove		= s3c_adc_remove,
-};
-
-static int __init adc_init(void)
-{
-	int ret;
-
-	ret = platform_driver_register(&s3c_adc_driver);
-	if (ret)
-		printk(KERN_ERR "%s: failed to add adc driver\n", __func__);
-
-	return ret;
-}
-
-module_init(adc_init);
diff --git a/arch/arm/mach-s3c/mach-crag6410.c b/arch/arm/mach-s3c/mach-crag6410.c
index 2ecb85856e24..7c4bed4370a1 100644
--- a/arch/arm/mach-s3c/mach-crag6410.c
+++ b/arch/arm/mach-s3c/mach-crag6410.c
@@ -58,7 +58,6 @@
 #include "keypad.h"
 #include "devs.h"
 #include "cpu.h"
-#include <linux/soc/samsung/s3c-adc.h>
 #include <linux/platform_data/i2c-s3c2410.h>
 #include "pm.h"
 
diff --git a/arch/arm/mach-s3c/regs-adc.h b/arch/arm/mach-s3c/regs-adc.h
deleted file mode 100644
index 58953c7381dd..000000000000
--- a/arch/arm/mach-s3c/regs-adc.h
+++ /dev/null
@@ -1,64 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (c) 2004 Shannon Holland <holland@loser.net>
- *
- * S3C2410 ADC registers
- */
-
-#ifndef __ASM_ARCH_REGS_ADC_H
-#define __ASM_ARCH_REGS_ADC_H "regs-adc.h"
-
-#define S3C2410_ADCREG(x) (x)
-
-#define S3C2410_ADCCON	   S3C2410_ADCREG(0x00)
-#define S3C2410_ADCTSC	   S3C2410_ADCREG(0x04)
-#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 S3C2443_ADCMUX		S3C2410_ADCREG(0x18)
-#define S3C64XX_ADCCLRINT	S3C2410_ADCREG(0x18)
-#define S5P_ADCMUX		S3C2410_ADCREG(0x1C)
-#define S3C64XX_ADCCLRINTPNDNUP	S3C2410_ADCREG(0x20)
-
-
-/* ADCCON Register Bits */
-#define S3C64XX_ADCCON_RESSEL		(1<<16)
-#define S3C2410_ADCCON_ECFLG		(1<<15)
-#define S3C2410_ADCCON_PRSCEN		(1<<14)
-#define S3C2410_ADCCON_PRSCVL(x)	(((x)&0xFF)<<6)
-#define S3C2410_ADCCON_PRSCVLMASK	(0xFF<<6)
-#define S3C2410_ADCCON_SELMUX(x)	(((x)&0x7)<<3)
-#define S3C2410_ADCCON_MUXMASK		(0x7<<3)
-#define S3C2416_ADCCON_RESSEL		(1 << 3)
-#define S3C2410_ADCCON_STDBM		(1<<2)
-#define S3C2410_ADCCON_READ_START	(1<<1)
-#define S3C2410_ADCCON_ENABLE_START	(1<<0)
-#define S3C2410_ADCCON_STARTMASK	(0x3<<0)
-
-
-/* ADCTSC Register Bits */
-#define S3C2443_ADCTSC_UD_SEN		(1 << 8)
-#define S3C2410_ADCTSC_YM_SEN		(1<<7)
-#define S3C2410_ADCTSC_YP_SEN		(1<<6)
-#define S3C2410_ADCTSC_XM_SEN		(1<<5)
-#define S3C2410_ADCTSC_XP_SEN		(1<<4)
-#define S3C2410_ADCTSC_PULL_UP_DISABLE	(1<<3)
-#define S3C2410_ADCTSC_AUTO_PST		(1<<2)
-#define S3C2410_ADCTSC_XY_PST(x)	(((x)&0x3)<<0)
-
-/* ADCDAT0 Bits */
-#define S3C2410_ADCDAT0_UPDOWN		(1<<15)
-#define S3C2410_ADCDAT0_AUTO_PST	(1<<14)
-#define S3C2410_ADCDAT0_XY_PST		(0x3<<12)
-#define S3C2410_ADCDAT0_XPDATA_MASK	(0x03FF)
-
-/* ADCDAT1 Bits */
-#define S3C2410_ADCDAT1_UPDOWN		(1<<15)
-#define S3C2410_ADCDAT1_AUTO_PST	(1<<14)
-#define S3C2410_ADCDAT1_XY_PST		(0x3<<12)
-#define S3C2410_ADCDAT1_YPDATA_MASK	(0x03FF)
-
-#endif /* __ASM_ARCH_REGS_ADC_H */
-
-