[PATCH v2] meson saradc: fix clock divider mask length

[George Stark]

According to datasheets of supported meson SOCs
length of ADC_CLK_DIV field is 6 bits long.
Although all supported SOCs have the register with the
field ADC_CLK_DIV documented later SOCs use external clock
rather than ADC internal clock so
this patch affects only meson8 family (S8* SOCs)

Fixes: 3adbf3427330 ("iio: adc: add a driver for the SAR ADC found in Amlogic Meson SoCs")
Signed-off-by: George Stark <GNStark at sberdevices.ru>
---
Changelog:

v1 -> v2:
    * Update commit message
---
 drivers/iio/adc/meson_saradc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 85b6826cc10c..b93ff42b8c19 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -72,7 +72,7 @@
 	#define MESON_SAR_ADC_REG3_PANEL_DETECT_COUNT_MASK	GENMASK(20, 18)
 	#define MESON_SAR_ADC_REG3_PANEL_DETECT_FILTER_TB_MASK	GENMASK(17, 16)
 	#define MESON_SAR_ADC_REG3_ADC_CLK_DIV_SHIFT		10
-	#define MESON_SAR_ADC_REG3_ADC_CLK_DIV_WIDTH		5
+	#define MESON_SAR_ADC_REG3_ADC_CLK_DIV_WIDTH		6
 	#define MESON_SAR_ADC_REG3_BLOCK_DLY_SEL_MASK		GENMASK(9, 8)
 	#define MESON_SAR_ADC_REG3_BLOCK_DLY_MASK		GENMASK(7, 0)
 
-- 
2.38.4