[PATCH v5 (staging-next) 3/5] staging:iio:hmc5843: register <-> value arrays now can have different lengths

Josef Gajdusek
2014-07-22T15:02:15Z

Changed structure of struct hmc5843_chip_info to include length of translation
arrays. Code previously using #defined constant has been changed accordingly.
This allows to integrate devices which do have different amounts of available
rates/scales.

Signed-off-by: Josef Gajdusek <atx@atx.name>
---
drivers/staging/iio/magnetometer/hmc5843_core.c | 34 +++++++++++++++++--------
1 file changed, 23 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/iio/magnetometer/hmc5843_core.c b/drivers/staging/iio/magnetometer/hmc5843_core.c
index bdeaf43..08fb0be 100644
--- a/drivers/staging/iio/magnetometer/hmc5843_core.c
+++ b/drivers/staging/iio/magnetometer/hmc5843_core.c
@@ -39,7 +39,6 @@
*/
#define HMC5843_RANGE_GAIN_OFFSET 0x05
#define HMC5843_RANGE_GAIN_DEFAULT 0x01
-#define HMC5843_RANGE_GAINS 8
#define HMC5843_RANGE_GAIN_MASK 0xe0

/* Device status */
@@ -59,7 +58,6 @@
*/
#define HMC5843_RATE_OFFSET 0x02
#define HMC5843_RATE_DEFAULT 0x04
-#define HMC5843_RATES 7
#define HMC5843_RATE_MASK 0x1c

/* Device measurement configuration */
@@ -69,15 +67,15 @@
#define HMC5843_MEAS_CONF_MASK 0x03

/* Scaling factors: 10000000/Gain */
-static const int hmc5843_regval_to_nanoscale[HMC5843_RANGE_GAINS] = {
+static const int hmc5843_regval_to_nanoscale[] = {
6173, 7692, 10309, 12821, 18868, 21739, 25641, 35714
};

-static const int hmc5883_regval_to_nanoscale[HMC5843_RANGE_GAINS] = {
+static const int hmc5883_regval_to_nanoscale[] = {
7812, 9766, 13021, 16287, 24096, 27701, 32573, 45662
};

-static const int hmc5883l_regval_to_nanoscale[HMC5843_RANGE_GAINS] = {
+static const int hmc5883l_regval_to_nanoscale[] = {
7299, 9174, 12195, 15152, 22727, 25641, 30303, 43478
};

@@ -94,11 +92,11 @@ static const int hmc5883l_regval_to_nanoscale[HMC5843_RANGE_GAINS] = {
* 6 | 50 | 75
* 7 | Not used | Not used
*/
-static const int hmc5843_regval_to_samp_freq[7][2] = {
+static const int hmc5843_regval_to_samp_freq[][2] = {
{0, 500000}, {1, 0}, {2, 0}, {5, 0}, {10, 0}, {20, 0}, {50, 0}
};

-static const int hmc5883_regval_to_samp_freq[7][2] = {
+static const int hmc5883_regval_to_samp_freq[][2] = {
{0, 750000}, {1, 500000}, {3, 0}, {7, 500000}, {15, 0}, {30, 0},
{75, 0}
};
@@ -107,7 +105,9 @@ static const int hmc5883_regval_to_samp_freq[7][2] = {
struct hmc5843_chip_info {
const struct iio_chan_spec *channels;
const int (*regval_to_samp_freq)[2];
+ const int n_regval_to_samp_freq;
const int *regval_to_nanoscale;
+ const int n_regval_to_nanoscale;
};

/* The lower two bits contain the current conversion mode */
@@ -248,7 +248,7 @@ static ssize_t hmc5843_show_samp_freq_avail(struct device *dev,
size_t len = 0;
int i;

- for (i = 0; i < HMC5843_RATES; i++)
+ for (i = 0; i < data->variant->n_regval_to_samp_freq; i++)
len += scnprintf(buf + len, PAGE_SIZE - len,
"%d.%d ", data->variant->regval_to_samp_freq[i][0],
data->variant->regval_to_samp_freq[i][1]);
@@ -278,7 +278,7 @@ static int hmc5843_get_samp_freq_index(struct hmc5843_data *data,
{
int i;

- for (i = 0; i < HMC5843_RATES; i++)
+ for (i = 0; i < data->variant->n_regval_to_samp_freq; i++)
if (val == data->variant->regval_to_samp_freq[i][0] &&
val2 == data->variant->regval_to_samp_freq[i][1])
return i;
@@ -307,7 +307,7 @@ static ssize_t hmc5843_show_scale_avail(struct device *dev,
size_t len = 0;
int i;

- for (i = 0; i < HMC5843_RANGE_GAINS; i++)
+ for (i = 0; i < data->variant->n_regval_to_nanoscale; i++)
len += scnprintf(buf + len, PAGE_SIZE - len,
"0.%09d ", data->variant->regval_to_nanoscale[i]);

@@ -327,7 +327,7 @@ static int hmc5843_get_scale_index(struct hmc5843_data *data, int val, int val2)
if (val != 0)
return -EINVAL;

- for (i = 0; i < HMC5843_RANGE_GAINS; i++)
+ for (i = 0; i < data->variant->n_regval_to_nanoscale; i++)
if (val2 == data->variant->regval_to_nanoscale[i])
return i;

@@ -480,17 +480,29 @@ static const struct hmc5843_chip_info hmc5843_chip_info_tbl[] = {
[HMC5843_ID] = {
.channels = hmc5843_channels,
.regval_to_samp_freq = hmc5843_regval_to_samp_freq,
+ .n_regval_to_samp_freq =
+ ARRAY_SIZE(hmc5843_regval_to_samp_freq),
.regval_to_nanoscale = hmc5843_regval_to_nanoscale,
+ .n_regval_to_nanoscale =
+ ARRAY_SIZE(hmc5843_regval_to_nanoscale),
},
[HMC5883_ID] = {
.channels = hmc5883_channels,
.regval_to_samp_freq = hmc5883_regval_to_samp_freq,
+ .n_regval_to_samp_freq =
+ ARRAY_SIZE(hmc5883_regval_to_samp_freq),
.regval_to_nanoscale = hmc5883_regval_to_nanoscale,
+ .n_regval_to_nanoscale =
+ ARRAY_SIZE(hmc5883_regval_to_nanoscale),
},
[HMC5883L_ID] = {
.channels = hmc5883_channels,
.regval_to_samp_freq = hmc5883_regval_to_samp_freq,
+ .n_regval_to_samp_freq =
+ ARRAY_SIZE(hmc5883_regval_to_samp_freq),
.regval_to_nanoscale = hmc5883l_regval_to_nanoscale,
+ .n_regval_to_nanoscale =
+ ARRAY_SIZE(hmc5883l_regval_to_nanoscale),
},
};

--
1.8.5.5