diff options
| author | Heiko Stuebner <heiko@sntech.de> | 2011-10-12 21:34:12 +0900 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2011-10-14 15:15:42 +0900 |
| commit | 35cc3cea2c2adb825dbe987000165005d28acaec (patch) | |
| tree | c20030c4c3c25828083ced2b9c29c78320e8aeb6 /arch/arm/plat-samsung/adc.c | |
| parent | 6247cea2b9c193a845a01381c36e18f11676fdfb (diff) | |
| download | linux-35cc3cea2c2adb825dbe987000165005d28acaec.tar.bz2 | |
ARM: SAMSUNG: Add support s3c2416-adc for S3C2416/S3C2450
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@sntech.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/plat-samsung/adc.c')
| -rw-r--r-- | arch/arm/plat-samsung/adc.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/arch/arm/plat-samsung/adc.c b/arch/arm/plat-samsung/adc.c index 8d8c4cc023db..33ecd0c9f0c3 100644 --- a/arch/arm/plat-samsung/adc.c +++ b/arch/arm/plat-samsung/adc.c @@ -42,6 +42,7 @@ enum s3c_cpu_type { TYPE_ADCV1, /* S3C24XX */ TYPE_ADCV11, /* S3C2443 */ + TYPE_ADCV12, /* S3C2416, S3C2450 */ TYPE_ADCV2, /* S3C64XX, S5P64X0, S5PC100 */ TYPE_ADCV3, /* S5PV210, S5PC110, EXYNOS4210 */ }; @@ -107,7 +108,7 @@ static inline void s3c_adc_select(struct adc_device *adc, if (!client->is_ts) { if (cpu == TYPE_ADCV3) writel(client->channel & 0xf, adc->regs + S5P_ADCMUX); - else if (cpu == TYPE_ADCV11) + else if (cpu == TYPE_ADCV11 || cpu == TYPE_ADCV12) writel(client->channel & 0xf, adc->regs + S3C2443_ADCMUX); else @@ -302,7 +303,7 @@ static irqreturn_t s3c_adc_irq(int irq, void *pw) data0 &= 0x3ff; data1 &= 0x3ff; } else { - /* S3C64XX/S5P ADC resolution is 12-bit */ + /* S3C2416/S3C64XX/S5P ADC resolution is 12-bit */ data0 &= 0xfff; data1 &= 0xfff; } @@ -337,6 +338,7 @@ 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; @@ -399,10 +401,13 @@ static int s3c_adc_probe(struct platform_device *pdev) clk_enable(adc->clk); tmp = adc->prescale | S3C2410_ADCCON_PRSCEN; - if (platform_get_device_id(pdev)->driver_data != TYPE_ADCV1) { - /* 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"); @@ -469,6 +474,7 @@ 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); + enum s3c_cpu_type cpu = platform_get_device_id(pdev)->driver_data; int ret; unsigned long tmp; @@ -479,9 +485,13 @@ static int s3c_adc_resume(struct device *dev) enable_irq(adc->irq); tmp = adc->prescale | S3C2410_ADCCON_PRSCEN; + /* Enable 12-bit ADC resolution */ - if (platform_get_device_id(pdev)->driver_data != TYPE_ADCV1) + 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; @@ -500,6 +510,9 @@ static struct platform_device_id s3c_adc_driver_ids[] = { .name = "s3c2443-adc", .driver_data = TYPE_ADCV11, }, { + .name = "s3c2416-adc", + .driver_data = TYPE_ADCV12, + }, { .name = "s3c64xx-adc", .driver_data = TYPE_ADCV2, }, { |