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adc: stm32mp15: split channel init into several routines

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Split stm32_adc_chan_of_init channel initialization function into
several routines to increase readability and prepare channel
generic binding handling.

Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
This commit is contained in:
Olivier Moysan
2022-11-23 16:20:15 +01:00
committed by Patrice Chotard
parent 2c8d548f4e
commit 1727d46bf9
1 changed files with 34 additions and 10 deletions
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44
drivers/adc/stm32-adc.c
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@@ -162,12 +162,8 @@ static int stm32_adc_channel_data(struct udevice *dev, int channel,
return 0;
}
static int stm32_adc_chan_of_init(struct udevice *dev)
static int stm32_adc_get_legacy_chan_count(struct udevice *dev)
{
struct adc_uclass_plat *uc_pdata = dev_get_uclass_plat(dev);
struct stm32_adc *adc = dev_get_priv(dev);
u32 chans[STM32_ADC_CH_MAX];
unsigned int i, num_channels;
int ret;
/* Retrieve single ended channels listed in device tree */
@@ -176,12 +172,16 @@ static int stm32_adc_chan_of_init(struct udevice *dev)
dev_err(dev, "can't get st,adc-channels: %d\n", ret);
return ret;
}
num_channels = ret / sizeof(u32);
if (num_channels > adc->cfg->max_channels) {
dev_err(dev, "too many st,adc-channels: %d\n", num_channels);
return -EINVAL;
}
return (ret / sizeof(u32));
}
static int stm32_adc_legacy_chan_init(struct udevice *dev, unsigned int num_channels)
{
struct adc_uclass_plat *uc_pdata = dev_get_uclass_plat(dev);
struct stm32_adc *adc = dev_get_priv(dev);
u32 chans[STM32_ADC_CH_MAX];
int i, ret;
ret = dev_read_u32_array(dev, "st,adc-channels", chans, num_channels);
if (ret < 0) {
@@ -197,6 +197,30 @@ static int stm32_adc_chan_of_init(struct udevice *dev)
uc_pdata->channel_mask |= 1 << chans[i];
}
return ret;
}
static int stm32_adc_chan_of_init(struct udevice *dev)
{
struct adc_uclass_plat *uc_pdata = dev_get_uclass_plat(dev);
struct stm32_adc *adc = dev_get_priv(dev);
unsigned int num_channels;
int ret;
ret = stm32_adc_get_legacy_chan_count(dev);
if (ret < 0)
return ret;
num_channels = ret;
if (num_channels > adc->cfg->max_channels) {
dev_err(dev, "too many st,adc-channels: %d\n", num_channels);
return -EINVAL;
}
ret = stm32_adc_legacy_chan_init(dev, num_channels);
if (ret < 0)
return ret;
uc_pdata->data_mask = (1 << adc->cfg->num_bits) - 1;
uc_pdata->data_format = ADC_DATA_FORMAT_BIN;
uc_pdata->data_timeout_us = 100000;