diff options
Diffstat (limited to 'drivers/input/touchscreen/imx6ul_tsc.c')
| -rw-r--r-- | drivers/input/touchscreen/imx6ul_tsc.c | 34 |
1 files changed, 22 insertions, 12 deletions
diff --git a/drivers/input/touchscreen/imx6ul_tsc.c b/drivers/input/touchscreen/imx6ul_tsc.c index ff0b75813daa..8275267eac25 100644 --- a/drivers/input/touchscreen/imx6ul_tsc.c +++ b/drivers/input/touchscreen/imx6ul_tsc.c @@ -94,7 +94,7 @@ struct imx6ul_tsc { * TSC module need ADC to get the measure value. So * before config TSC, we should initialize ADC module. */ -static void imx6ul_adc_init(struct imx6ul_tsc *tsc) +static int imx6ul_adc_init(struct imx6ul_tsc *tsc) { int adc_hc = 0; int adc_gc; @@ -122,17 +122,23 @@ static void imx6ul_adc_init(struct imx6ul_tsc *tsc) timeout = wait_for_completion_timeout (&tsc->completion, ADC_TIMEOUT); - if (timeout == 0) + if (timeout == 0) { dev_err(tsc->dev, "Timeout for adc calibration\n"); + return -ETIMEDOUT; + } adc_gs = readl(tsc->adc_regs + REG_ADC_GS); - if (adc_gs & ADC_CALF) + if (adc_gs & ADC_CALF) { dev_err(tsc->dev, "ADC calibration failed\n"); + return -EINVAL; + } /* TSC need the ADC work in hardware trigger */ adc_cfg = readl(tsc->adc_regs + REG_ADC_CFG); adc_cfg |= ADC_HARDWARE_TRIGGER; writel(adc_cfg, tsc->adc_regs + REG_ADC_CFG); + + return 0; } /* @@ -188,11 +194,17 @@ static void imx6ul_tsc_set(struct imx6ul_tsc *tsc) writel(start, tsc->tsc_regs + REG_TSC_FLOW_CONTROL); } -static void imx6ul_tsc_init(struct imx6ul_tsc *tsc) +static int imx6ul_tsc_init(struct imx6ul_tsc *tsc) { - imx6ul_adc_init(tsc); + int err; + + err = imx6ul_adc_init(tsc); + if (err) + return err; imx6ul_tsc_channel_config(tsc); imx6ul_tsc_set(tsc); + + return 0; } static void imx6ul_tsc_disable(struct imx6ul_tsc *tsc) @@ -311,9 +323,7 @@ static int imx6ul_tsc_open(struct input_dev *input_dev) return err; } - imx6ul_tsc_init(tsc); - - return 0; + return imx6ul_tsc_init(tsc); } static void imx6ul_tsc_close(struct input_dev *input_dev) @@ -337,7 +347,7 @@ static int imx6ul_tsc_probe(struct platform_device *pdev) int tsc_irq; int adc_irq; - tsc = devm_kzalloc(&pdev->dev, sizeof(struct imx6ul_tsc), GFP_KERNEL); + tsc = devm_kzalloc(&pdev->dev, sizeof(*tsc), GFP_KERNEL); if (!tsc) return -ENOMEM; @@ -345,7 +355,7 @@ static int imx6ul_tsc_probe(struct platform_device *pdev) if (!input_dev) return -ENOMEM; - input_dev->name = "iMX6UL TouchScreen Controller"; + input_dev->name = "iMX6UL Touchscreen Controller"; input_dev->id.bustype = BUS_HOST; input_dev->open = imx6ul_tsc_open; @@ -406,7 +416,7 @@ static int imx6ul_tsc_probe(struct platform_device *pdev) } adc_irq = platform_get_irq(pdev, 1); - if (adc_irq <= 0) { + if (adc_irq < 0) { dev_err(&pdev->dev, "no adc irq resource?\n"); return adc_irq; } @@ -491,7 +501,7 @@ static int __maybe_unused imx6ul_tsc_resume(struct device *dev) goto out; } - imx6ul_tsc_init(tsc); + retval = imx6ul_tsc_init(tsc); } out: |