aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/plat-samsung/adc.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/plat-samsung/adc.c')
-rw-r--r--arch/arm/plat-samsung/adc.c160
1 files changed, 99 insertions, 61 deletions
diff --git a/arch/arm/plat-samsung/adc.c b/arch/arm/plat-samsung/adc.c
index e8f2be2d67f..79690f2f6d3 100644
--- a/arch/arm/plat-samsung/adc.c
+++ b/arch/arm/plat-samsung/adc.c
@@ -21,6 +21,7 @@
#include <linux/clk.h>
#include <linux/interrupt.h>
#include <linux/io.h>
+#include <linux/regulator/consumer.h>
#include <plat/regs-adc.h>
#include <plat/adc.h>
@@ -39,8 +40,11 @@
*/
enum s3c_cpu_type {
- TYPE_S3C24XX,
- TYPE_S3C64XX
+ TYPE_ADCV1, /* S3C24XX */
+ TYPE_ADCV11, /* S3C2443 */
+ TYPE_ADCV12, /* S3C2416, S3C2450 */
+ TYPE_ADCV2, /* S3C64XX, S5P64X0, S5PC100 */
+ TYPE_ADCV3, /* S5PV210, S5PC110, EXYNOS4210 */
};
struct s3c_adc_client {
@@ -71,6 +75,7 @@ struct adc_device {
unsigned int prescale;
int irq;
+ struct regulator *vdd;
};
static struct adc_device *adc_dev;
@@ -91,15 +96,24 @@ 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);
- con &= ~S3C2410_ADCCON_MUXMASK;
+ if (cpu == TYPE_ADCV1 || cpu == TYPE_ADCV2)
+ con &= ~S3C2410_ADCCON_MUXMASK;
con &= ~S3C2410_ADCCON_STDBM;
con &= ~S3C2410_ADCCON_STARTMASK;
- if (!client->is_ts)
- con |= S3C2410_ADCCON_SELMUX(client->channel);
+ 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);
}
@@ -143,11 +157,13 @@ int s3c_adc_start(struct s3c_adc_client *client,
return -EINVAL;
}
- if (client->is_ts && adc->ts_pend)
- return -EAGAIN;
-
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;
@@ -285,13 +301,13 @@ static irqreturn_t s3c_adc_irq(int irq, void *pw)
client->nr_samples--;
- if (cpu == TYPE_S3C64XX) {
- /* S3C64XX ADC resolution is 12-bit */
- data0 &= 0xfff;
- data1 &= 0xfff;
- } else {
+ 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)
@@ -312,7 +328,7 @@ static irqreturn_t s3c_adc_irq(int irq, void *pw)
}
exit:
- if (cpu == TYPE_S3C64XX) {
+ if (cpu == TYPE_ADCV2 || cpu == TYPE_ADCV3) {
/* Clear ADC interrupt */
writel(0, adc->regs + S3C64XX_ADCCLRINT);
}
@@ -324,10 +340,11 @@ static int s3c_adc_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct adc_device *adc;
struct resource *regs;
+ enum s3c_cpu_type cpu = platform_get_device_id(pdev)->driver_data;
int ret;
unsigned tmp;
- adc = kzalloc(sizeof(struct adc_device), GFP_KERNEL);
+ adc = devm_kzalloc(dev, sizeof(struct adc_device), GFP_KERNEL);
if (adc == NULL) {
dev_err(dev, "failed to allocate adc_device\n");
return -ENOMEM;
@@ -338,47 +355,50 @@ static int s3c_adc_probe(struct platform_device *pdev)
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) {
dev_err(dev, "failed to get adc irq\n");
- ret = -ENOENT;
- goto err_alloc;
+ return -ENOENT;
}
- ret = request_irq(adc->irq, s3c_adc_irq, 0, dev_name(dev), adc);
+ 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");
- goto err_alloc;
+ return ret;
}
- adc->clk = clk_get(dev, "adc");
+ adc->clk = devm_clk_get(dev, "adc");
if (IS_ERR(adc->clk)) {
dev_err(dev, "failed to get adc clock\n");
- ret = PTR_ERR(adc->clk);
- goto err_irq;
+ return PTR_ERR(adc->clk);
}
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!regs) {
- dev_err(dev, "failed to find registers\n");
- ret = -ENXIO;
- goto err_clk;
- }
+ adc->regs = devm_ioremap_resource(dev, regs);
+ if (IS_ERR(adc->regs))
+ return PTR_ERR(adc->regs);
- adc->regs = ioremap(regs->start, resource_size(regs));
- if (!adc->regs) {
- dev_err(dev, "failed to map registers\n");
- ret = -ENXIO;
- goto err_clk;
- }
+ ret = regulator_enable(adc->vdd);
+ if (ret)
+ return ret;
clk_enable(adc->clk);
tmp = adc->prescale | S3C2410_ADCCON_PRSCEN;
- if (platform_get_device_id(pdev)->driver_data == TYPE_S3C64XX) {
- /* Enable 12-bit ADC resolution */
+
+ /* 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");
@@ -387,34 +407,23 @@ static int s3c_adc_probe(struct platform_device *pdev)
adc_dev = adc;
return 0;
-
- err_clk:
- clk_put(adc->clk);
-
- err_irq:
- free_irq(adc->irq, adc);
-
- err_alloc:
- kfree(adc);
- return ret;
}
-static int __devexit s3c_adc_remove(struct platform_device *pdev)
+static int s3c_adc_remove(struct platform_device *pdev)
{
struct adc_device *adc = platform_get_drvdata(pdev);
- iounmap(adc->regs);
- free_irq(adc->irq, adc);
clk_disable(adc->clk);
- clk_put(adc->clk);
- kfree(adc);
+ regulator_disable(adc->vdd);
return 0;
}
#ifdef CONFIG_PM
-static int s3c_adc_suspend(struct platform_device *pdev, pm_message_t state)
+static int s3c_adc_suspend(struct device *dev)
{
+ struct platform_device *pdev = container_of(dev,
+ struct platform_device, dev);
struct adc_device *adc = platform_get_drvdata(pdev);
unsigned long flags;
u32 con;
@@ -428,19 +437,35 @@ static int s3c_adc_suspend(struct platform_device *pdev, pm_message_t state)
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 platform_device *pdev)
+static int s3c_adc_resume(struct device *dev)
{
+ struct platform_device *pdev = container_of(dev,
+ struct 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);
- writel(adc->prescale | S3C2410_ADCCON_PRSCEN,
- adc->regs + S3C2410_ADCCON);
+ 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;
}
@@ -453,25 +478,38 @@ static int s3c_adc_resume(struct platform_device *pdev)
static struct platform_device_id s3c_adc_driver_ids[] = {
{
.name = "s3c24xx-adc",
- .driver_data = TYPE_S3C24XX,
+ .driver_data = TYPE_ADCV1,
+ }, {
+ .name = "s3c2443-adc",
+ .driver_data = TYPE_ADCV11,
+ }, {
+ .name = "s3c2416-adc",
+ .driver_data = TYPE_ADCV12,
}, {
.name = "s3c64xx-adc",
- .driver_data = TYPE_S3C64XX,
+ .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",
.owner = THIS_MODULE,
+ .pm = &adc_pm_ops,
},
.probe = s3c_adc_probe,
- .remove = __devexit_p(s3c_adc_remove),
- .suspend = s3c_adc_suspend,
- .resume = s3c_adc_resume,
+ .remove = s3c_adc_remove,
};
static int __init adc_init(void)
@@ -485,4 +523,4 @@ static int __init adc_init(void)
return ret;
}
-arch_initcall(adc_init);
+module_init(adc_init);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 22:23:09 +0000