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iio/adc: ingenic: add JZ4760 support to the sadc driver

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The jz4760 sadc is very similar to the jz4770 one, but has a VREF of 2.5V
and 3 aux channels.

modify ingenic_adc_read_chan_info_raw() needs a change to account for it.

Signed-off-by: Christophe Branchereau <cbranchereau@gmail.com>

Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20210726082033.351533-4-cbranchereau@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Christophe Branchereau 2021-07-26 10:20:31 +02:00 committed by Jonathan Cameron
parent d827cbcdb3
commit b9e9bdd425
1 changed files with 78 additions and 4 deletions
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82
drivers/iio/adc/ingenic-adc.c
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@ -71,6 +71,7 @@
#define JZ4725B_ADC_BATTERY_HIGH_VREF_BITS 10
#define JZ4740_ADC_BATTERY_HIGH_VREF (7500 * 0.986)
#define JZ4740_ADC_BATTERY_HIGH_VREF_BITS 12
#define JZ4760_ADC_BATTERY_VREF 2500
#define JZ4770_ADC_BATTERY_VREF 1200
#define JZ4770_ADC_BATTERY_VREF_BITS 12
@ -295,6 +296,10 @@ static const int jz4740_adc_battery_scale_avail[] = {
JZ_ADC_BATTERY_LOW_VREF, JZ_ADC_BATTERY_LOW_VREF_BITS,
};
static const int jz4760_adc_battery_scale_avail[] = {
JZ4760_ADC_BATTERY_VREF, JZ4770_ADC_BATTERY_VREF_BITS,
};
static const int jz4770_adc_battery_raw_avail[] = {
0, 1, (1 << JZ4770_ADC_BATTERY_VREF_BITS) - 1,
};
@ -400,6 +405,47 @@ static const struct iio_chan_spec jz4740_channels[] = {
},
};
static const struct iio_chan_spec jz4760_channels[] = {
{
.extend_name = "aux",
.type = IIO_VOLTAGE,
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_SCALE),
.indexed = 1,
.channel = INGENIC_ADC_AUX0,
.scan_index = -1,
},
{
.extend_name = "aux1",
.type = IIO_VOLTAGE,
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_SCALE),
.indexed = 1,
.channel = INGENIC_ADC_AUX,
.scan_index = -1,
},
{
.extend_name = "aux2",
.type = IIO_VOLTAGE,
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_SCALE),
.indexed = 1,
.channel = INGENIC_ADC_AUX2,
.scan_index = -1,
},
{
.extend_name = "battery",
.type = IIO_VOLTAGE,
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_SCALE),
.info_mask_separate_available = BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_SCALE),
.indexed = 1,
.channel = INGENIC_ADC_BATTERY,
.scan_index = -1,
},
};
static const struct iio_chan_spec jz4770_channels[] = {
{
.type = IIO_VOLTAGE,
@ -526,6 +572,20 @@ static const struct ingenic_adc_soc_data jz4740_adc_soc_data = {
.init_clk_div = NULL, /* no ADCLK register on JZ4740 */
};
static const struct ingenic_adc_soc_data jz4760_adc_soc_data = {
.battery_high_vref = JZ4760_ADC_BATTERY_VREF,
.battery_high_vref_bits = JZ4770_ADC_BATTERY_VREF_BITS,
.battery_raw_avail = jz4770_adc_battery_raw_avail,
.battery_raw_avail_size = ARRAY_SIZE(jz4770_adc_battery_raw_avail),
.battery_scale_avail = jz4760_adc_battery_scale_avail,
.battery_scale_avail_size = ARRAY_SIZE(jz4760_adc_battery_scale_avail),
.battery_vref_mode = false,
.has_aux_md = true,
.channels = jz4760_channels,
.num_channels = ARRAY_SIZE(jz4760_channels),
.init_clk_div = jz4770_adc_init_clk_div,
};
static const struct ingenic_adc_soc_data jz4770_adc_soc_data = {
.battery_high_vref = JZ4770_ADC_BATTERY_VREF,
.battery_high_vref_bits = JZ4770_ADC_BATTERY_VREF_BITS,
@ -569,7 +629,7 @@ static int ingenic_adc_read_chan_info_raw(struct iio_dev *iio_dev,
struct iio_chan_spec const *chan,
int *val)
{
int bit, ret, engine = (chan->channel == INGENIC_ADC_BATTERY);
int cmd, ret, engine = (chan->channel == INGENIC_ADC_BATTERY);
struct ingenic_adc *adc = iio_priv(iio_dev);
ret = clk_enable(adc->clk);
@ -579,11 +639,22 @@ static int ingenic_adc_read_chan_info_raw(struct iio_dev *iio_dev,
return ret;
}
/* We cannot sample AUX/AUX2 in parallel. */
/* We cannot sample the aux channels in parallel. */
mutex_lock(&adc->aux_lock);
if (adc->soc_data->has_aux_md && engine == 0) {
bit = BIT(chan->channel == INGENIC_ADC_AUX2);
ingenic_adc_set_config(adc, JZ_ADC_REG_CFG_AUX_MD, bit);
switch (chan->channel) {
case INGENIC_ADC_AUX0:
cmd = 0;
break;
case INGENIC_ADC_AUX:
cmd = 1;
break;
case INGENIC_ADC_AUX2:
cmd = 2;
break;
}
ingenic_adc_set_config(adc, JZ_ADC_REG_CFG_AUX_MD, cmd);
}
ret = ingenic_adc_capture(adc, engine);
@ -591,6 +662,7 @@ static int ingenic_adc_read_chan_info_raw(struct iio_dev *iio_dev,
goto out;
switch (chan->channel) {
case INGENIC_ADC_AUX0:
case INGENIC_ADC_AUX:
case INGENIC_ADC_AUX2:
*val = readw(adc->base + JZ_ADC_REG_ADSDAT);
@ -621,6 +693,7 @@ static int ingenic_adc_read_raw(struct iio_dev *iio_dev,
return ingenic_adc_read_chan_info_raw(iio_dev, chan, val);
case IIO_CHAN_INFO_SCALE:
switch (chan->channel) {
case INGENIC_ADC_AUX0:
case INGENIC_ADC_AUX:
case INGENIC_ADC_AUX2:
*val = JZ_ADC_AUX_VREF;
@ -832,6 +905,7 @@ static int ingenic_adc_probe(struct platform_device *pdev)
static const struct of_device_id ingenic_adc_of_match[] = {
{ .compatible = "ingenic,jz4725b-adc", .data = &jz4725b_adc_soc_data, },
{ .compatible = "ingenic,jz4740-adc", .data = &jz4740_adc_soc_data, },
{ .compatible = "ingenic,jz4760-adc", .data = &jz4760_adc_soc_data, },
{ .compatible = "ingenic,jz4770-adc", .data = &jz4770_adc_soc_data, },
{ },
};