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drivers: spi: stm32 can support TI mode for the SPI frame format

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Depending of the soc and SPI peripheral, the Frame-Format of the
SPI can be configured to support TI or Motorola protocol.
This is configured through a new DTS property.

Signed-off-by: Francois Ramu <francois.ramu@st.com>
This commit is contained in:
Francois Ramu 2021-09-28 11:30:34 +02:00 committed by Christopher Friedt
parent 394996313a
commit d563313ab1
2 changed files with 24 additions and 1 deletions
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15
drivers/spi/spi_ll_stm32.c
View file

@ -559,7 +559,11 @@ static int spi_stm32_configure(const struct device *dev,
#if !defined(CONFIG_SOC_SERIES_STM32F1X) \
&& (!defined(CONFIG_SOC_SERIES_STM32L1X) || defined(SPI_CR2_FRF))
LL_SPI_SetStandard(spi, LL_SPI_PROTOCOL_MOTOROLA);
if (cfg->ti_mode) {
LL_SPI_SetStandard(spi, LL_SPI_PROTOCOL_TI);
} else {
LL_SPI_SetStandard(spi, LL_SPI_PROTOCOL_MOTOROLA);
}
#endif
/* At this point, it's mandatory to set this on the context! */
@ -924,6 +928,14 @@ static void spi_stm32_irq_config_func_##id(const struct device *dev) \
#define SPI_DMA_STATUS_SEM(id)
#endif
#if !defined(CONFIG_SOC_SERIES_STM32F1X) \
&& (!defined(CONFIG_SOC_SERIES_STM32L1X) || defined(SPI_CR2_FRF))
#define STM32_SPI_TI_MODE_CONFIG(id) \
.ti_mode = DT_INST_PROP(id, frame_format),
#else
#define STM32_SPI_TI_MODE_CONFIG(id)
#endif
#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32_spi_subghz)
#define STM32_SPI_USE_SUBGHZSPI_NSS_CONFIG(id) \
.use_subghzspi_nss = DT_INST_PROP_OR( \
@ -948,6 +960,7 @@ static const struct spi_stm32_config spi_stm32_cfg_##id = { \
.pinctrl_list_size = ARRAY_SIZE(spi_pins_##id), \
STM32_SPI_IRQ_HANDLER_FUNC(id) \
STM32_SPI_USE_SUBGHZSPI_NSS_CONFIG(id) \
STM32_SPI_TI_MODE_CONFIG(id) \
}; \
\
static struct spi_stm32_data spi_stm32_dev_data_##id = { \

10
drivers/spi/spi_ll_stm32.h
View file

@ -19,6 +19,16 @@ struct spi_stm32_config {
#ifdef CONFIG_SPI_STM32_INTERRUPT
irq_config_func_t irq_config;
#endif
#if !defined(CONFIG_SOC_SERIES_STM32F1X) \
&& (!defined(CONFIG_SOC_SERIES_STM32L1X) || defined(SPI_CR2_FRF))
/*
* if supported by the instance, this bit will configure the frame-format
* of the SPI to be compliant with the TI protocol.
*/
bool ti_mode;
#endif
#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32_spi_subghz)
bool use_subghzspi_nss;
#endif