s3c-adc: Add support for S3C2416/S3C2450
From: Heiko Stuebner <heiko@...> Date: Thu, 8 Sep 2011 21:19:00 +0200
Commit-Message
The ADC of the S3C2416/2450 SoC is 10 or 12 bit wide, has its source selection in the register base+0x18 and its width selection in bit 03 of the ADCCON register. Signed-off-by: Heiko Stuebner <heiko@...>
Patch-Comment
changes since v1: move setname call arch/arm/mach-s3c2416/s3c2416.c | 3 +++ arch/arm/plat-samsung/adc.c | 24 +++++++++++++++++++----- 2 files changed, 22 insertions(+), 5 deletions(-)
Statistics
- 22 lines added
- 5 lines removed
Changes
----------------------- arch/arm/mach-s3c2416/s3c2416.c ------------------------
index 494ce91..4261bdc 100644
@@ -60,6 +60,7 @@
#include <plat/iic-core.h>
#include <plat/fb-core.h>
#include <plat/nand-core.h>
+#include <plat/adc-core.h>
static struct map_desc s3c2416_iodesc[] __initdata = {
IODESC_ENT(WATCHDOG),
@@ -97,6 +98,8 @@ int __init s3c2416_init(void)
s3c_fb_setname("s3c2443-fb");
+ s3c_adc_setname("s3c2416-adc");
+
register_syscore_ops(&s3c2416_pm_syscore_ops);
register_syscore_ops(&s3c24xx_irq_syscore_ops);
------------------------- arch/arm/plat-samsung/adc.c --------------------------
index af16957..c53c509 100644
@@ -358,6 +358,7 @@ static int s3c_adc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct adc_device *adc;
+ int cpu = platform_get_device_id(pdev)->driver_data;
struct resource *regs;
int ret;
unsigned tmp;
@@ -421,9 +422,12 @@ static int s3c_adc_probe(struct platform_device *pdev)
clk_enable(adc->clk);
tmp = adc->prescale | S3C2410_ADCCON_PRSCEN;
+ /* Enable 12-bit ADC resolution */
+ if (cpu & S3C_ADC_QUIRK_12BIT) {
+ if (cpu & S3C_ADC_QUIRK_RESSEL03)
+ tmp |= S3C2416_ADCCON_RESSEL;
+ else
+ tmp |= S3C64XX_ADCCON_RESSEL;
}
writel(tmp, adc->regs + S3C2410_ADCCON);
@@ -491,6 +495,7 @@ 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);
+ int cpu = platform_get_device_id(pdev)->driver_data;
int ret;
unsigned long tmp;
@@ -502,8 +507,12 @@ static int s3c_adc_resume(struct device *dev)
tmp = adc->prescale | S3C2410_ADCCON_PRSCEN;
/* Enable 12-bit ADC resolution */
+ if (cpu & S3C_ADC_QUIRK_12BIT) {
+ if (cpu & S3C_ADC_QUIRK_RESSEL03)
+ tmp |= S3C2416_ADCCON_RESSEL;
+ else
+ tmp |= S3C64XX_ADCCON_RESSEL;
+ }
writel(tmp, adc->regs + S3C2410_ADCCON);
return 0;
@@ -524,6 +533,11 @@ static struct platform_device_id s3c_adc_driver_ids[] = {
.driver_data = S3C_ADC_QUIRK_10BIT |
S3C_ADC_QUIRK_MUX18,
}, {
+ .name = "s3c2416-adc",
+ .driver_data = S3C_ADC_QUIRK_12BIT |
+ S3C_ADC_QUIRK_MUX18 |
+ S3C_ADC_QUIRK_RESSEL03,
+ }, {
.name = "s3c64xx-adc",
.driver_data = S3C_ADC_QUIRK_12BIT |
S3C_ADC_QUIRK_MUXADCCON |