diff options
| -rw-r--r-- | arch/arm/plat-samsung/adc.c | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/arch/arm/plat-samsung/adc.c b/arch/arm/plat-samsung/adc.c index e8f2be2d67f2..2224128cc603 100644 --- a/arch/arm/plat-samsung/adc.c +++ b/arch/arm/plat-samsung/adc.c @@ -21,6 +21,7 @@ #include <linux/clk.h> #include <linux/interrupt.h> #include <linux/io.h> +#include <linux/regulator/consumer.h> #include <plat/regs-adc.h> #include <plat/adc.h> @@ -71,6 +72,7 @@ struct adc_device { unsigned int prescale; int irq; + struct regulator *vdd; }; static struct adc_device *adc_dev; @@ -338,17 +340,24 @@ static int s3c_adc_probe(struct platform_device *pdev) adc->pdev = pdev; adc->prescale = S3C2410_ADCCON_PRSCVL(49); + adc->vdd = regulator_get(dev, "vdd"); + if (IS_ERR(adc->vdd)) { + dev_err(dev, "operating without regulator \"vdd\" .\n"); + ret = PTR_ERR(adc->vdd); + goto err_alloc; + } + adc->irq = platform_get_irq(pdev, 1); if (adc->irq <= 0) { dev_err(dev, "failed to get adc irq\n"); ret = -ENOENT; - goto err_alloc; + goto err_reg; } ret = request_irq(adc->irq, s3c_adc_irq, 0, dev_name(dev), adc); if (ret < 0) { dev_err(dev, "failed to attach adc irq\n"); - goto err_alloc; + goto err_reg; } adc->clk = clk_get(dev, "adc"); @@ -372,6 +381,10 @@ static int s3c_adc_probe(struct platform_device *pdev) goto err_clk; } + ret = regulator_enable(adc->vdd); + if (ret) + goto err_ioremap; + clk_enable(adc->clk); tmp = adc->prescale | S3C2410_ADCCON_PRSCEN; @@ -388,12 +401,15 @@ static int s3c_adc_probe(struct platform_device *pdev) return 0; + err_ioremap: + iounmap(adc->regs); err_clk: clk_put(adc->clk); err_irq: free_irq(adc->irq, adc); - + err_reg: + regulator_put(adc->vdd); err_alloc: kfree(adc); return ret; @@ -406,6 +422,8 @@ static int __devexit s3c_adc_remove(struct platform_device *pdev) iounmap(adc->regs); free_irq(adc->irq, adc); clk_disable(adc->clk); + regulator_disable(adc->vdd); + regulator_put(adc->vdd); clk_put(adc->clk); kfree(adc); @@ -428,6 +446,7 @@ static int s3c_adc_suspend(struct platform_device *pdev, pm_message_t state) disable_irq(adc->irq); spin_unlock_irqrestore(&adc->lock, flags); clk_disable(adc->clk); + regulator_disable(adc->vdd); return 0; } @@ -435,7 +454,11 @@ static int s3c_adc_suspend(struct platform_device *pdev, pm_message_t state) static int s3c_adc_resume(struct platform_device *pdev) { struct adc_device *adc = platform_get_drvdata(pdev); + int ret; + ret = regulator_enable(adc->vdd); + if (ret) + return ret; clk_enable(adc->clk); enable_irq(adc->irq); @@ -485,4 +508,4 @@ static int __init adc_init(void) return ret; } -arch_initcall(adc_init); +module_init(adc_init); |