From 67dcaec8d62ab751dbd1d5f9b3f3c1ce4205edf5 Mon Sep 17 00:00:00 2001 From: MyungJoo Ham Date: Wed, 20 Jul 2011 21:08:18 +0900 Subject: [PATCH] ARM: SAMSUNG: Revise PM for 12-bit ADC operations - Fixed: 12bit precision is lost at suspend/resume - Updated: use pm_dev_ops Signed-off-by: MyungJoo Ham Signed-off-by: Kyungmin Park Signed-off-by: Kukjin Kim --- arch/arm/plat-samsung/adc.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/arch/arm/plat-samsung/adc.c b/arch/arm/plat-samsung/adc.c index 45cc7e6982c1..ee8deef19481 100644 --- a/arch/arm/plat-samsung/adc.c +++ b/arch/arm/plat-samsung/adc.c @@ -437,8 +437,10 @@ static int __devexit s3c_adc_remove(struct platform_device *pdev) } #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; @@ -457,10 +459,13 @@ static int s3c_adc_suspend(struct platform_device *pdev, pm_message_t state) 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); int ret; + unsigned long tmp; ret = regulator_enable(adc->vdd); if (ret) @@ -468,8 +473,11 @@ static int s3c_adc_resume(struct platform_device *pdev) 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 (platform_get_device_id(pdev)->driver_data != TYPE_ADCV1) + tmp |= S3C64XX_ADCCON_RESSEL; + writel(tmp, adc->regs + S3C2410_ADCCON); return 0; } @@ -494,16 +502,20 @@ static struct platform_device_id s3c_adc_driver_ids[] = { }; 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, }; static int __init adc_init(void)