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Commit cc146410 authored by Arnd Bergmann's avatar Arnd Bergmann
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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: default avatarMark Brown <broonie@kernel.org>
Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parent 743c8fbb
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arch/arm/mach-s3c/Kconfig
View file @ cc146410
...@@ -63,16 +63,6 @@ config S3C_GPIO_TRACK ...@@ -63,16 +63,6 @@ config S3C_GPIO_TRACK
Internal configuration option to enable the s3c specific gpio Internal configuration option to enable the s3c specific gpio
chip tracking if the platform requires it. 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 # device definitions to compile in
config S3C_DEV_HSMMC config S3C_DEV_HSMMC
...@@ -165,11 +155,6 @@ config S3C_DEV_RTC ...@@ -165,11 +155,6 @@ config S3C_DEV_RTC
help help
Compile in platform device definition for RTC 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 config S3C64XX_DEV_SPI0
bool bool
help help
......
arch/arm/mach-s3c/Kconfig.s3c64xx
View file @ cc146410
...@@ -125,7 +125,6 @@ config MACH_WLF_CRAGG_6410 ...@@ -125,7 +125,6 @@ config MACH_WLF_CRAGG_6410
select S3C_DEV_USB_HOST select S3C_DEV_USB_HOST
select S3C_DEV_USB_HSOTG select S3C_DEV_USB_HSOTG
select S3C_DEV_WDT select S3C_DEV_WDT
select SAMSUNG_DEV_ADC
select SAMSUNG_DEV_KEYPAD select SAMSUNG_DEV_KEYPAD
select SAMSUNG_DEV_PWM select SAMSUNG_DEV_PWM
help help
......
arch/arm/mach-s3c/Makefile
View file @ cc146410
...@@ -8,10 +8,6 @@ include $(src)/Makefile.s3c64xx ...@@ -8,10 +8,6 @@ include $(src)/Makefile.s3c64xx
obj-y += init.o cpu.o obj-y += init.o cpu.o
# ADC
obj-$(CONFIG_S3C_ADC) += adc.o
# devices # devices
obj-$(CONFIG_SAMSUNG_ATAGS) += platformdata.o obj-$(CONFIG_SAMSUNG_ATAGS) += platformdata.o
......
arch/arm/mach-s3c/adc.c deleted 100644 → 0
View file @ 743c8fbb
// 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);
arch/arm/mach-s3c/mach-crag6410.c
View file @ cc146410
...@@ -58,7 +58,6 @@ ...@@ -58,7 +58,6 @@
#include "keypad.h" #include "keypad.h"
#include "devs.h" #include "devs.h"
#include "cpu.h" #include "cpu.h"
#include <linux/soc/samsung/s3c-adc.h>
#include <linux/platform_data/i2c-s3c2410.h> #include <linux/platform_data/i2c-s3c2410.h>
#include "pm.h" #include "pm.h"
......
arch/arm/mach-s3c/regs-adc.h deleted 100644 → 0
View file @ 743c8fbb
/* 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 */
include/linux/soc/samsung/s3c-adc.h deleted 100644 → 0
View file @ 743c8fbb
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2008 Simtec Electronics
* http://armlinux.simtec.co.uk/
* Ben Dooks <ben@simtec.co.uk>
*
* S3C ADC driver information
*/
#ifndef __LINUX_SOC_SAMSUNG_S3C_ADC_H
#define __LINUX_SOC_SAMSUNG_S3C_ADC_H __FILE__
struct s3c_adc_client;
struct platform_device;
extern int s3c_adc_start(struct s3c_adc_client *client,
unsigned int channel, unsigned int nr_samples);
extern int s3c_adc_read(struct s3c_adc_client *client, unsigned int ch);
extern struct s3c_adc_client *
s3c_adc_register(struct platform_device *pdev,
void (*select)(struct s3c_adc_client *client,
unsigned selected),
void (*conv)(struct s3c_adc_client *client,
unsigned d0, unsigned d1,
unsigned *samples_left),
unsigned int is_ts);
extern void s3c_adc_release(struct s3c_adc_client *client);
#endif /* __LINUX_SOC_SAMSUNG_S3C_ADC_H */
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