#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>
struct s3c_adc_client *cur;
struct s3c_adc_client *ts_pend;
void __iomem *regs;
+ spinlock_t lock;
unsigned int prescale;
static struct adc_device *adc_dev;
-static LIST_HEAD(adc_pending);
+static LIST_HEAD(adc_pending); /* protected by adc_device.lock */
#define adc_dbg(_adc, msg...) dev_dbg(&(_adc)->pdev->dev, msg)
if (client->is_ts && adc->ts_pend)
return -EAGAIN;
- local_irq_save(flags);
+ spin_lock_irqsave(&adc->lock, flags);
client->channel = channel;
client->nr_samples = nr_samples;
if (!adc->cur)
s3c_adc_try(adc);
- local_irq_restore(flags);
+
+ spin_unlock_irqrestore(&adc->lock, flags);
return 0;
}
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->cur == NULL)
s3c_adc_try(adc_dev);
+
+ spin_unlock_irqrestore(&adc_dev->lock, flags);
kfree(client);
}
EXPORT_SYMBOL_GPL(s3c_adc_release);
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 long flags;
unsigned data0, data1;
if (!client) {
client->select_cb(client, 1);
s3c_adc_convert(adc);
} else {
- local_irq_save(flags);
+ spin_lock(&adc->lock);
(client->select_cb)(client, 0);
adc->cur = NULL;
s3c_adc_try(adc);
- local_irq_restore(flags);
+ spin_unlock(&adc->lock);
}
exit:
return -ENOMEM;
}
+ spin_lock_init(&adc->lock);
+
adc->pdev = pdev;
adc->prescale = S3C2410_ADCCON_PRSCVL(49);
static int s3c_adc_suspend(struct platform_device *pdev, pm_message_t state)
{
struct adc_device *adc = platform_get_drvdata(pdev);
+ 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);
return 0;
static int s3c_adc_resume(struct platform_device *pdev)
{
struct adc_device *adc = platform_get_drvdata(pdev);
+ unsigned long flags;
clk_enable(adc->clk);
enable_irq(adc->irq);