From 64df92ea7893d1cfd714c2f6acfd2eb15fbe3279 Mon Sep 17 00:00:00 2001 From: MyungJoo Ham Date: Wed, 20 Jul 2011 21:08:18 +0900 Subject: ARM: SAMSUNG: ADC Channel selection In S5PV210/S5PC110/EXYNOS4, ADCMUX channel selection uses ADCMUX register, not ADCCON register. This patch corrects the behavior of SAMSUNG-ADC for such CPUs. Signed-off-by: MyungJoo Ham Signed-off-by: Kyungmin Park Signed-off-by: Kukjin Kim --- arch/arm/plat-samsung/adc.c | 29 +++++++++++++++++++---------- 1 file changed, 19 insertions(+), 10 deletions(-) (limited to 'arch/arm/plat-samsung/adc.c') diff --git a/arch/arm/plat-samsung/adc.c b/arch/arm/plat-samsung/adc.c index 2224128cc603..45cc7e6982c1 100644 --- a/arch/arm/plat-samsung/adc.c +++ b/arch/arm/plat-samsung/adc.c @@ -40,8 +40,9 @@ */ enum s3c_cpu_type { - TYPE_S3C24XX, - TYPE_S3C64XX + TYPE_ADCV1, /* S3C24XX */ + TYPE_ADCV2, /* S3C64XX, S5P64X0, S5PC100 */ + TYPE_ADCV3, /* S5PV210, S5PC110, EXYNOS4210 */ }; struct s3c_adc_client { @@ -93,6 +94,7 @@ 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); @@ -100,8 +102,12 @@ static inline void s3c_adc_select(struct adc_device *adc, 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 + con |= S3C2410_ADCCON_SELMUX(client->channel); + } writel(con, adc->regs + S3C2410_ADCCON); } @@ -287,8 +293,8 @@ static irqreturn_t s3c_adc_irq(int irq, void *pw) client->nr_samples--; - if (cpu == TYPE_S3C64XX) { - /* S3C64XX ADC resolution is 12-bit */ + if (cpu != TYPE_ADCV1) { + /* S3C64XX/S5P ADC resolution is 12-bit */ data0 &= 0xfff; data1 &= 0xfff; } else { @@ -314,7 +320,7 @@ static irqreturn_t s3c_adc_irq(int irq, void *pw) } exit: - if (cpu == TYPE_S3C64XX) { + if (cpu != TYPE_ADCV1) { /* Clear ADC interrupt */ writel(0, adc->regs + S3C64XX_ADCCLRINT); } @@ -388,7 +394,7 @@ 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_S3C64XX) { + if (platform_get_device_id(pdev)->driver_data != TYPE_ADCV1) { /* Enable 12-bit ADC resolution */ tmp |= S3C64XX_ADCCON_RESSEL; } @@ -476,10 +482,13 @@ 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 = "s3c64xx-adc", - .driver_data = TYPE_S3C64XX, + .driver_data = TYPE_ADCV2, + }, { + .name = "samsung-adc-v3", + .driver_data = TYPE_ADCV3, }, { } }; -- cgit v1.2.3