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staging:iio:max1363 add support for 8 bit equivalent devices, max1036-9, max11600-5 

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jonathan Cameron 2010-05-04 14:43:10 +01:00 committed by Greg Kroah-Hartman
parent c3fa0fddd6
commit 3bf877c1cc
3 changed files with 161 additions and 17 deletions
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12
drivers/staging/iio/adc/Kconfig
View File

@ -10,11 +10,13 @@ config MAX1363
select MAX1363_RING_BUFFER
help
Say yes here to build support for many MAXIM i2c analog to digital
convertors (ADC). (max1361, max1362, max1363, max1364, max1136,
max1136, max1137, max1138, max1139, max1236, max1237, max11238,
max1239, max11606, max11607, max11608, max11609, max11610,
max11611, max11612, max11613, max11614, max11615, max11616,
max11617) Provides direct access via sysfs.
convertors (ADC). (max1361, max1362, max1363, max1364, max1036,
max1037, max1038, max1039, max1136, max1136, max1137, max1138,
max1139, max1236, max1237, max11238, max1239, max11600, max11601,
max11602, max11603, max11604, max11605, max11606, max11607,
max11608, max11609, max11610, max11611, max11612, max11613,
max11614, max11615, max11616, max11617) Provides direct access
via sysfs.
config MAX1363_RING_BUFFER
bool "MAXIM max1363: use ring buffer"

143
drivers/staging/iio/adc/max1363_core.c
View File

@ -226,13 +226,24 @@ static ssize_t max1363_read_single_channel(struct device *dev,
if (ret)
goto error_ret;
}
/* Get reading */
data = i2c_master_recv(client, rxbuf, 2);
if (data < 0) {
ret = data;
goto error_ret;
if (st->chip_info->bits != 8) {
/* Get reading */
data = i2c_master_recv(client, rxbuf, 2);
if (data < 0) {
ret = data;
goto error_ret;
}
data = (s32)(rxbuf[1]) | ((s32)(rxbuf[0] & 0x0F)) << 8;
} else {
/* Get reading */
data = i2c_master_recv(client, rxbuf, 1);
if (data < 0) {
ret = data;
goto error_ret;
}
data = rxbuf[0];
}
data = (s32)(rxbuf[1]) | ((s32)(rxbuf[0] & 0x0F)) << 8;
}
/* Pretty print the result */
len = sprintf(buf, "%u\n", data);
@ -508,6 +519,10 @@ enum { max1361,
max1362,
max1363,
max1364,
max1036,
max1037,
max1038,
max1039,
max1136,
max1137,
max1138,
@ -516,6 +531,12 @@ enum { max1361,
max1237,
max1238,
max1239,
max11600,
max11601,
max11602,
max11603,
max11604,
max11605,
max11606,
max11607,
max11608,
@ -576,6 +597,46 @@ static const struct max1363_chip_info max1363_chip_info_tbl[] = {
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max1036",
.num_inputs = 4,
.bits = 8,
.int_vref_mv = 4096,
.mode_list = max1236_mode_list,
.num_modes = ARRAY_SIZE(max1236_mode_list),
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max1037",
.num_inputs = 4,
.bits = 8,
.int_vref_mv = 2048,
.mode_list = max1236_mode_list,
.num_modes = ARRAY_SIZE(max1236_mode_list),
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max1038",
.num_inputs = 12,
.bits = 8,
.int_vref_mv = 4096,
.mode_list = max1238_mode_list,
.num_modes = ARRAY_SIZE(max1238_mode_list),
.default_mode = s0to11,
.dev_attrs = &max1238_dev_attr_group,
.scan_attrs = &max1238_scan_el_group,
}, {
.name = "max1039",
.num_inputs = 12,
.bits = 8,
.int_vref_mv = 2048,
.mode_list = max1238_mode_list,
.num_modes = ARRAY_SIZE(max1238_mode_list),
.default_mode = s0to11,
.dev_attrs = &max1238_dev_attr_group,
.scan_attrs = &max1238_scan_el_group,
}, {
.name = "max1136",
.num_inputs = 4,
@ -656,6 +717,66 @@ static const struct max1363_chip_info max1363_chip_info_tbl[] = {
.default_mode = s0to11,
.dev_attrs = &max1238_dev_attr_group,
.scan_attrs = &max1238_scan_el_group,
}, {
.name = "max11600",
.num_inputs = 4,
.bits = 8,
.int_vref_mv = 4096,
.mode_list = max11607_mode_list,
.num_modes = ARRAY_SIZE(max11607_mode_list),
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max11601",
.num_inputs = 4,
.bits = 8,
.int_vref_mv = 2048,
.mode_list = max11607_mode_list,
.num_modes = ARRAY_SIZE(max11607_mode_list),
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max11602",
.num_inputs = 8,
.bits = 8,
.int_vref_mv = 4096,
.mode_list = max11608_mode_list,
.num_modes = ARRAY_SIZE(max11608_mode_list),
.default_mode = s0to7,
.dev_attrs = &max11608_dev_attr_group,
.scan_attrs = &max11608_scan_el_group,
}, {
.name = "max11603",
.num_inputs = 8,
.bits = 8,
.int_vref_mv = 2048,
.mode_list = max11608_mode_list,
.num_modes = ARRAY_SIZE(max11608_mode_list),
.default_mode = s0to7,
.dev_attrs = &max11608_dev_attr_group,
.scan_attrs = &max11608_scan_el_group,
}, {
.name = "max11604",
.num_inputs = 12,
.bits = 8,
.int_vref_mv = 4098,
.mode_list = max1238_mode_list,
.num_modes = ARRAY_SIZE(max1238_mode_list),
.default_mode = s0to11,
.dev_attrs = &max1238_dev_attr_group,
.scan_attrs = &max1238_scan_el_group,
}, {
.name = "max11605",
.num_inputs = 12,
.bits = 8,
.int_vref_mv = 2048,
.mode_list = max1238_mode_list,
.num_modes = ARRAY_SIZE(max1238_mode_list),
.default_mode = s0to11,
.dev_attrs = &max1238_dev_attr_group,
.scan_attrs = &max1238_scan_el_group,
}, {
.name = "max11606",
.num_inputs = 4,
@ -920,6 +1041,10 @@ static const struct i2c_device_id max1363_id[] = {
{ "max1362", max1362 },
{ "max1363", max1363 },
{ "max1364", max1364 },
{ "max1036", max1036 },
{ "max1037", max1037 },
{ "max1038", max1038 },
{ "max1039", max1039 },
{ "max1136", max1136 },
{ "max1137", max1137 },
{ "max1138", max1138 },
@ -928,6 +1053,12 @@ static const struct i2c_device_id max1363_id[] = {
{ "max1237", max1237 },
{ "max1238", max1238 },
{ "max1239", max1239 },
{ "max11600", max11600 },
{ "max11601", max11601 },
{ "max11602", max11602 },
{ "max11603", max11603 },
{ "max11604", max11604 },
{ "max11605", max11605 },
{ "max11606", max11606 },
{ "max11607", max11607 },
{ "max11608", max11608 },

23
drivers/staging/iio/adc/max1363_ring.c
View File

@ -55,8 +55,11 @@ int max1363_single_channel_from_ring(long mask, struct max1363_state *st)
count++;
mask >>= 1;
}
return ((int)(ring_data[count*2 + 0] & 0x0F) << 8)
+ (int)(ring_data[count*2 + 1]);
if (st->chip_info->bits != 8)
return ((int)(ring_data[count*2 + 0] & 0x0F) << 8)
+ (int)(ring_data[count*2 + 1]);
else
return ring_data[count];
error_free_ring_data:
kfree(ring_data);
@ -90,7 +93,10 @@ static int max1363_ring_preenable(struct iio_dev *indio_dev)
numvals = hweight_long(st->current_mode->modemask);
if (indio_dev->ring->access.set_bpd) {
d_size = numvals*2 + sizeof(s64);
if (st->chip_info->bits != 8)
d_size = numvals*2 + sizeof(s64);
else
d_size = numvals + sizeof(s64);
if (d_size % 8)
d_size += 8 - (d_size % 8);
indio_dev->ring->access.set_bpd(indio_dev->ring, d_size);
@ -166,7 +172,10 @@ static void max1363_poll_bh_to_ring(struct work_struct *work_s)
unsigned long numvals = hweight_long(st->current_mode->modemask);
/* Ensure the timestamp is 8 byte aligned */
d_size = numvals*2 + sizeof(s64);
if (st->chip_info->bits != 8)
d_size = numvals*2 + sizeof(s64);
else
d_size = numvals + sizeof(s64);
if (d_size % sizeof(s64))
d_size += sizeof(s64) - (d_size % sizeof(s64));
@ -184,8 +193,10 @@ static void max1363_poll_bh_to_ring(struct work_struct *work_s)
rxbuf = kmalloc(d_size, GFP_KERNEL);
if (rxbuf == NULL)
return;
b_sent = i2c_master_recv(st->client, rxbuf, numvals*2);
if (st->chip_info->bits != 8)
b_sent = i2c_master_recv(st->client, rxbuf, numvals*2);
else
b_sent = i2c_master_recv(st->client, rxbuf, numvals);
if (b_sent < 0)
goto done;