diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/plat-samsung/adc.c | 24 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/include/plat/regs-adc.h | 1 |
2 files changed, 20 insertions, 5 deletions
diff --git a/arch/arm/plat-samsung/adc.c b/arch/arm/plat-samsung/adc.c index c7659b7378b..81caf213572 100644 --- a/arch/arm/plat-samsung/adc.c +++ b/arch/arm/plat-samsung/adc.c @@ -262,6 +262,7 @@ 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 long flags; unsigned data0, data1; @@ -276,9 +277,17 @@ 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 { + data0 &= 0x3ff; + data1 &= 0x3ff; + } + if (client->convert_cb) - (client->convert_cb)(client, data0 & 0x3ff, data1 & 0x3ff, - &client->nr_samples); + (client->convert_cb)(client, data0, data1, &client->nr_samples); if (client->nr_samples > 0) { /* fire another conversion for this */ @@ -295,7 +304,7 @@ static irqreturn_t s3c_adc_irq(int irq, void *pw) } exit: - if (platform_get_device_id(adc->pdev)->driver_data == TYPE_S3C64XX) { + if (cpu == TYPE_S3C64XX) { /* Clear ADC interrupt */ writel(0, adc->regs + S3C64XX_ADCCLRINT); } @@ -308,6 +317,7 @@ static int s3c_adc_probe(struct platform_device *pdev) struct adc_device *adc; struct resource *regs; int ret; + unsigned tmp; adc = kzalloc(sizeof(struct adc_device), GFP_KERNEL); if (adc == NULL) { @@ -354,8 +364,12 @@ static int s3c_adc_probe(struct platform_device *pdev) clk_enable(adc->clk); - writel(adc->prescale | S3C2410_ADCCON_PRSCEN, - adc->regs + S3C2410_ADCCON); + tmp = adc->prescale | S3C2410_ADCCON_PRSCEN; + if (platform_get_device_id(pdev)->driver_data == TYPE_S3C64XX) { + /* Enable 12-bit ADC resolution */ + tmp |= S3C64XX_ADCCON_RESSEL; + } + writel(tmp, adc->regs + S3C2410_ADCCON); dev_info(dev, "attached adc driver\n"); diff --git a/arch/arm/plat-samsung/include/plat/regs-adc.h b/arch/arm/plat-samsung/include/plat/regs-adc.h index f43c8dab39e..7554c4fcddb 100644 --- a/arch/arm/plat-samsung/include/plat/regs-adc.h +++ b/arch/arm/plat-samsung/include/plat/regs-adc.h @@ -25,6 +25,7 @@ /* 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) |