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| author | MyungJoo Ham <myungjoo.ham@samsung.com> | 2011-07-20 21:08:18 +0900 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2011-07-20 23:39:12 +0900 |
| commit | 67dcaec8d62ab751dbd1d5f9b3f3c1ce4205edf5 (patch) | |
| tree | d291d8696c1b435bce3b20683aa01d3cdae1f440 /arch/arm/plat-samsung/adc.c | |
| parent | 64df92ea7893d1cfd714c2f6acfd2eb15fbe3279 (diff) | |
| download | lwn-67dcaec8d62ab751dbd1d5f9b3f3c1ce4205edf5.tar.gz lwn-67dcaec8d62ab751dbd1d5f9b3f3c1ce4205edf5.zip | |
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 <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
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 | 24 |
1 files 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) |