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authorKrzysztof Kozlowski <krzk@kernel.org>2019-02-12 18:45:49 +0100
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2019-02-12 20:56:00 +0000
commit103cda6a3b8d2c10d5f8cd7abad118e9db8f4776 (patch)
tree76da1598dd96eed812103df2f79735c80457e0fd /drivers/iio
parent66d388ff4a73d2f930fa3c9d5ade259522769ea5 (diff)
downloadlinux-103cda6a3b8d2c10d5f8cd7abad118e9db8f4776.tar.bz2
iio: adc: exynos-adc: Use proper number of channels for Exynos4x12
Exynos4212 and Exynos4412 have only four ADC channels so using "samsung,exynos-adc-v1" compatible (for eight channels ADCv1) on them is wrong. Add a new compatible for Exynos4x12. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/adc/exynos_adc.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
index 41da522fc673..1ca2c4d39f87 100644
--- a/drivers/iio/adc/exynos_adc.c
+++ b/drivers/iio/adc/exynos_adc.c
@@ -115,6 +115,7 @@
#define MAX_ADC_V2_CHANNELS 10
#define MAX_ADC_V1_CHANNELS 8
#define MAX_EXYNOS3250_ADC_CHANNELS 2
+#define MAX_EXYNOS4212_ADC_CHANNELS 4
#define MAX_S5PV210_ADC_CHANNELS 10
/* Bit definitions common for ADC_V1 and ADC_V2 */
@@ -271,6 +272,19 @@ static void exynos_adc_v1_start_conv(struct exynos_adc *info,
writel(con1 | ADC_CON_EN_START, ADC_V1_CON(info->regs));
}
+/* Exynos4212 and 4412 is like ADCv1 but with four channels only */
+static const struct exynos_adc_data exynos4212_adc_data = {
+ .num_channels = MAX_EXYNOS4212_ADC_CHANNELS,
+ .mask = ADC_DATX_MASK, /* 12 bit ADC resolution */
+ .needs_adc_phy = true,
+ .phy_offset = EXYNOS_ADCV1_PHY_OFFSET,
+
+ .init_hw = exynos_adc_v1_init_hw,
+ .exit_hw = exynos_adc_v1_exit_hw,
+ .clear_irq = exynos_adc_v1_clear_irq,
+ .start_conv = exynos_adc_v1_start_conv,
+};
+
static const struct exynos_adc_data exynos_adc_v1_data = {
.num_channels = MAX_ADC_V1_CHANNELS,
.mask = ADC_DATX_MASK, /* 12 bit ADC resolution */
@@ -493,6 +507,9 @@ static const struct of_device_id exynos_adc_match[] = {
.compatible = "samsung,s5pv210-adc",
.data = &exynos_adc_s5pv210_data,
}, {
+ .compatible = "samsung,exynos4212-adc",
+ .data = &exynos4212_adc_data,
+ }, {
.compatible = "samsung,exynos-adc-v1",
.data = &exynos_adc_v1_data,
}, {