iio: adc: at91-sama5d2_adc: fix sama7g5 realbits value

The number of valid bits in SAMA7G5 ADC channel data register are 16.
Hence changing the realbits value to 16

Fixes: 840bf6cb983f ("iio: adc: at91-sama5d2_adc: add support for sama7g5 device")
Signed-off-by: Nayab Sayed <nayabbasha.sayed@microchip.com>
Link: https://patch.msgid.link/20250115-fix-sama7g5-adc-realbits-v2-1-58a6e4087584@microchip.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c
index 8e5aaf15a9215083d90312e037b18c2b09e132e8..c3a1dea2aa82edb23166c6f73f5f16dc41beaed6 100644 (file)
--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c
@@ -329,7 +329,7 @@ static const struct at91_adc_reg_layout sama7g5_layout = {
 #define AT91_HWFIFO_MAX_SIZE_STR       "128"
 #define AT91_HWFIFO_MAX_SIZE           128
 
-#define AT91_SAMA5D2_CHAN_SINGLE(index, num, addr)                     \
+#define AT91_SAMA_CHAN_SINGLE(index, num, addr, rbits)                 \
        {                                                               \
                .type = IIO_VOLTAGE,                                    \
                .channel = num,                                         \
@@ -337,7 +337,7 @@ static const struct at91_adc_reg_layout sama7g5_layout = {
                .scan_index = index,                                    \
                .scan_type = {                                          \
                        .sign = 'u',                                    \
-                       .realbits = 14,                                 \
+                       .realbits = rbits,                              \
                        .storagebits = 16,                              \
                },                                                      \
                .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),           \
@@ -350,7 +350,13 @@ static const struct at91_adc_reg_layout sama7g5_layout = {
                .indexed = 1,                                           \
        }
 
-#define AT91_SAMA5D2_CHAN_DIFF(index, num, num2, addr)                 \
+#define AT91_SAMA5D2_CHAN_SINGLE(index, num, addr)                     \
+       AT91_SAMA_CHAN_SINGLE(index, num, addr, 14)
+
+#define AT91_SAMA7G5_CHAN_SINGLE(index, num, addr)                     \
+       AT91_SAMA_CHAN_SINGLE(index, num, addr, 16)
+
+#define AT91_SAMA_CHAN_DIFF(index, num, num2, addr, rbits)             \
        {                                                               \
                .type = IIO_VOLTAGE,                                    \
                .differential = 1,                                      \
@@ -360,7 +366,7 @@ static const struct at91_adc_reg_layout sama7g5_layout = {
                .scan_index = index,                                    \
                .scan_type = {                                          \
                        .sign = 's',                                    \
-                       .realbits = 14,                                 \
+                       .realbits = rbits,                              \
                        .storagebits = 16,                              \
                },                                                      \
                .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),           \
@@ -373,6 +379,12 @@ static const struct at91_adc_reg_layout sama7g5_layout = {
                .indexed = 1,                                           \
        }
 
+#define AT91_SAMA5D2_CHAN_DIFF(index, num, num2, addr)                 \
+       AT91_SAMA_CHAN_DIFF(index, num, num2, addr, 14)
+
+#define AT91_SAMA7G5_CHAN_DIFF(index, num, num2, addr)                 \
+       AT91_SAMA_CHAN_DIFF(index, num, num2, addr, 16)
+
 #define AT91_SAMA5D2_CHAN_TOUCH(num, name, mod)                                \
        {                                                               \
                .type = IIO_POSITIONRELATIVE,                           \
@@ -666,30 +678,30 @@ static const struct iio_chan_spec at91_sama5d2_adc_channels[] = {
 };
 
 static const struct iio_chan_spec at91_sama7g5_adc_channels[] = {
-       AT91_SAMA5D2_CHAN_SINGLE(0, 0, 0x60),
-       AT91_SAMA5D2_CHAN_SINGLE(1, 1, 0x64),
-       AT91_SAMA5D2_CHAN_SINGLE(2, 2, 0x68),
-       AT91_SAMA5D2_CHAN_SINGLE(3, 3, 0x6c),
-       AT91_SAMA5D2_CHAN_SINGLE(4, 4, 0x70),
-       AT91_SAMA5D2_CHAN_SINGLE(5, 5, 0x74),
-       AT91_SAMA5D2_CHAN_SINGLE(6, 6, 0x78),
-       AT91_SAMA5D2_CHAN_SINGLE(7, 7, 0x7c),
-       AT91_SAMA5D2_CHAN_SINGLE(8, 8, 0x80),
-       AT91_SAMA5D2_CHAN_SINGLE(9, 9, 0x84),
-       AT91_SAMA5D2_CHAN_SINGLE(10, 10, 0x88),
-       AT91_SAMA5D2_CHAN_SINGLE(11, 11, 0x8c),
-       AT91_SAMA5D2_CHAN_SINGLE(12, 12, 0x90),
-       AT91_SAMA5D2_CHAN_SINGLE(13, 13, 0x94),
-       AT91_SAMA5D2_CHAN_SINGLE(14, 14, 0x98),
-       AT91_SAMA5D2_CHAN_SINGLE(15, 15, 0x9c),
-       AT91_SAMA5D2_CHAN_DIFF(16, 0, 1, 0x60),
-       AT91_SAMA5D2_CHAN_DIFF(17, 2, 3, 0x68),
-       AT91_SAMA5D2_CHAN_DIFF(18, 4, 5, 0x70),
-       AT91_SAMA5D2_CHAN_DIFF(19, 6, 7, 0x78),
-       AT91_SAMA5D2_CHAN_DIFF(20, 8, 9, 0x80),
-       AT91_SAMA5D2_CHAN_DIFF(21, 10, 11, 0x88),
-       AT91_SAMA5D2_CHAN_DIFF(22, 12, 13, 0x90),
-       AT91_SAMA5D2_CHAN_DIFF(23, 14, 15, 0x98),
+       AT91_SAMA7G5_CHAN_SINGLE(0, 0, 0x60),
+       AT91_SAMA7G5_CHAN_SINGLE(1, 1, 0x64),
+       AT91_SAMA7G5_CHAN_SINGLE(2, 2, 0x68),
+       AT91_SAMA7G5_CHAN_SINGLE(3, 3, 0x6c),
+       AT91_SAMA7G5_CHAN_SINGLE(4, 4, 0x70),
+       AT91_SAMA7G5_CHAN_SINGLE(5, 5, 0x74),
+       AT91_SAMA7G5_CHAN_SINGLE(6, 6, 0x78),
+       AT91_SAMA7G5_CHAN_SINGLE(7, 7, 0x7c),
+       AT91_SAMA7G5_CHAN_SINGLE(8, 8, 0x80),
+       AT91_SAMA7G5_CHAN_SINGLE(9, 9, 0x84),
+       AT91_SAMA7G5_CHAN_SINGLE(10, 10, 0x88),
+       AT91_SAMA7G5_CHAN_SINGLE(11, 11, 0x8c),
+       AT91_SAMA7G5_CHAN_SINGLE(12, 12, 0x90),
+       AT91_SAMA7G5_CHAN_SINGLE(13, 13, 0x94),
+       AT91_SAMA7G5_CHAN_SINGLE(14, 14, 0x98),
+       AT91_SAMA7G5_CHAN_SINGLE(15, 15, 0x9c),
+       AT91_SAMA7G5_CHAN_DIFF(16, 0, 1, 0x60),
+       AT91_SAMA7G5_CHAN_DIFF(17, 2, 3, 0x68),
+       AT91_SAMA7G5_CHAN_DIFF(18, 4, 5, 0x70),
+       AT91_SAMA7G5_CHAN_DIFF(19, 6, 7, 0x78),
+       AT91_SAMA7G5_CHAN_DIFF(20, 8, 9, 0x80),
+       AT91_SAMA7G5_CHAN_DIFF(21, 10, 11, 0x88),
+       AT91_SAMA7G5_CHAN_DIFF(22, 12, 13, 0x90),
+       AT91_SAMA7G5_CHAN_DIFF(23, 14, 15, 0x98),
        IIO_CHAN_SOFT_TIMESTAMP(24),
        AT91_SAMA5D2_CHAN_TEMP(AT91_SAMA7G5_ADC_TEMP_CHANNEL, "temp", 0xdc),
 };