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Diffstat (limited to 'drivers/iio/adc/imx7d_adc.c')
-rw-r--r--drivers/iio/adc/imx7d_adc.c24
1 files changed, 7 insertions, 17 deletions
diff --git a/drivers/iio/adc/imx7d_adc.c b/drivers/iio/adc/imx7d_adc.c
index 4fe97c2a0f43..26a7bbe4d534 100644
--- a/drivers/iio/adc/imx7d_adc.c
+++ b/drivers/iio/adc/imx7d_adc.c
@@ -78,6 +78,7 @@
#define IMX7D_REG_ADC_INT_STATUS_CHANNEL_CONV_TIME_OUT 0xf0000
#define IMX7D_ADC_TIMEOUT msecs_to_jiffies(100)
+#define IMX7D_ADC_INPUT_CLK 24000000
enum imx7d_adc_clk_pre_div {
IMX7D_ADC_ANALOG_CLK_PRE_DIV_4,
@@ -100,8 +101,6 @@ struct imx7d_adc_feature {
enum imx7d_adc_average_num avg_num;
u32 core_time_unit; /* impact the sample rate */
-
- bool average_en;
};
struct imx7d_adc {
@@ -179,7 +178,6 @@ static void imx7d_adc_feature_config(struct imx7d_adc *info)
info->adc_feature.clk_pre_div = IMX7D_ADC_ANALOG_CLK_PRE_DIV_4;
info->adc_feature.avg_num = IMX7D_ADC_AVERAGE_NUM_32;
info->adc_feature.core_time_unit = 1;
- info->adc_feature.average_en = true;
}
static void imx7d_adc_sample_rate_set(struct imx7d_adc *info)
@@ -240,9 +238,8 @@ static void imx7d_adc_channel_set(struct imx7d_adc *info)
/* the channel choose single conversion, and enable average mode */
cfg1 |= (IMX7D_REG_ADC_CH_CFG1_CHANNEL_EN |
- IMX7D_REG_ADC_CH_CFG1_CHANNEL_SINGLE);
- if (info->adc_feature.average_en)
- cfg1 |= IMX7D_REG_ADC_CH_CFG1_CHANNEL_AVG_EN;
+ IMX7D_REG_ADC_CH_CFG1_CHANNEL_SINGLE |
+ IMX7D_REG_ADC_CH_CFG1_CHANNEL_AVG_EN);
/*
* physical channel 0 chose logical channel A
@@ -272,13 +269,11 @@ static void imx7d_adc_channel_set(struct imx7d_adc *info)
static u32 imx7d_adc_get_sample_rate(struct imx7d_adc *info)
{
- /* input clock is always 24MHz */
- u32 input_clk = 24000000;
u32 analogue_core_clk;
u32 core_time_unit = info->adc_feature.core_time_unit;
u32 tmp;
- analogue_core_clk = input_clk / info->pre_div_num;
+ analogue_core_clk = IMX7D_ADC_INPUT_CLK / info->pre_div_num;
tmp = (core_time_unit + 1) * 6;
return analogue_core_clk / tmp;
@@ -493,11 +488,8 @@ static int imx7d_adc_probe(struct platform_device *pdev)
info->dev = dev;
info->regs = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(info->regs)) {
- ret = PTR_ERR(info->regs);
- dev_err(dev, "Failed to remap adc memory, err = %d\n", ret);
- return ret;
- }
+ if (IS_ERR(info->regs))
+ return PTR_ERR(info->regs);
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
@@ -531,9 +523,7 @@ static int imx7d_adc_probe(struct platform_device *pdev)
indio_dev->channels = imx7d_adc_iio_channels;
indio_dev->num_channels = ARRAY_SIZE(imx7d_adc_iio_channels);
- ret = devm_request_irq(dev, irq,
- imx7d_adc_isr, 0,
- dev_name(dev), info);
+ ret = devm_request_irq(dev, irq, imx7d_adc_isr, 0, dev_name(dev), info);
if (ret < 0) {
dev_err(dev, "Failed requesting irq, irq = %d\n", irq);
return ret;