Commit 726c0ea5 authored by Francois Ramu's avatar Francois Ramu Committed by Carles Cufi
Browse files

drivers: adc: stm32 internal channel for VBat measurement 



It allows the path for VBATEN on stm32 series
to monitor the Vbat voltage, in case of CONFIG_STM32_VBAT
Add the common Vref value as a property of the ADC.

Signed-off-by: default avatarFrancois Ramu <francois.ramu@st.com>
parent 32222e07

drivers/adc/adc_stm32.c

+18 −4
Original line number Diff line number Diff line
@@ -259,8 +259,10 @@ struct adc_stm32_cfg { 
	void (*irq_cfg_func)(void);

	struct stm32_pclken pclken;

	const struct pinctrl_dev_config *pcfg;

	uint16_t vref_mv;

	bool has_temp_channel;

	bool has_vref_channel;

	bool has_vbat_channel;

};



#ifdef CONFIG_ADC_STM32_SHARED_IRQS
@@ -871,6 +873,14 @@ static void adc_stm32_setup_channels(const struct device *dev, uint8_t channel_i 
		__LL_ADC_CHANNEL_TO_DECIMAL_NB(LL_ADC_CHANNEL_VREFINT) == channel_id) {

		adc_stm32_set_common_path(dev, LL_ADC_PATH_INTERNAL_VREFINT);

	}

#if defined(CONFIG_STM32_VBAT)

	/* Enable the bridge divider only when needed for ADC conversion. */

	if (config->has_vbat_channel &&

		__LL_ADC_CHANNEL_TO_DECIMAL_NB(LL_ADC_CHANNEL_VBAT) == channel_id) {

		adc_stm32_set_common_path(dev, LL_ADC_PATH_INTERNAL_VBAT);

	}



#endif /* CONFIG_STM32_VBAT */

}



static int adc_stm32_channel_setup(const struct device *dev,
@@ -1186,8 +1196,10 @@ static const struct adc_stm32_cfg adc_stm32_cfg_##index = { \ 
		.bus = DT_INST_CLOCKS_CELL(index, bus),			\

	},								\

	.pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(index),			\

	.vref_mv = DT_INST_PROP(index, vref_mv),			\

	.has_temp_channel = DT_INST_PROP(index, has_temp_channel),	\

	.has_vref_channel = DT_INST_PROP(index, has_vref_channel),	\

	.has_vbat_channel = DT_INST_PROP(index, has_vbat_channel),	\

};

#else

#define ADC_STM32_CONFIG(index)						\
@@ -1207,8 +1219,10 @@ static const struct adc_stm32_cfg adc_stm32_cfg_##index = { \ 
		.bus = DT_INST_CLOCKS_CELL(index, bus),			\

	},								\

	.pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(index),			\

	.vref_mv = DT_INST_PROP(index, vref_mv),			\

	.has_temp_channel = DT_INST_PROP(index, has_temp_channel),	\

	.has_vref_channel = DT_INST_PROP(index, has_vref_channel),	\

	.has_vbat_channel = DT_INST_PROP(index, has_vbat_channel),	\

};

#endif /* CONFIG_ADC_STM32_SHARED_IRQS */

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