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drivers: spi: spi_ll_stm32: Add config to manage slave select

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Allow the user to use software slave select instead of the
hardware pin, in order to free the related GPIO and avoid
unwanted SS triggering on the hardware pin. The default SS
is still the hardware pin.

Signed-off-by: Yaël Boutreux <yael.boutreux@st.com>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
This commit is contained in:
Yaël Boutreux 2019-07-24 08:23:52 +02:00 • committed by Kumar Gala
commit 13ceab4c3b
27 changed files with 85 additions and 1 deletions
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4
boards/arm/96b_carbon/pinmux.c
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@ -35,13 +35,17 @@ static const struct pin_config pinconf[] = {
{STM32_PIN_PB3, STM32F4_PINMUX_FUNC_PB3_I2C2_SDA},
#endif /* CONFIG_I2C_2 */
#ifdef CONFIG_SPI_1
#ifdef CONFIG_SPI_STM32_USE_HW_SS
{STM32_PIN_PA4, STM32F4_PINMUX_FUNC_PA4_SPI1_NSS},
#endif /* CONFIG_SPI_STM32_USE_HW_SS */
{STM32_PIN_PA5, STM32F4_PINMUX_FUNC_PA5_SPI1_SCK},
{STM32_PIN_PA6, STM32F4_PINMUX_FUNC_PA6_SPI1_MISO},
{STM32_PIN_PA7, STM32F4_PINMUX_FUNC_PA7_SPI1_MOSI},
#endif /* CONFIG_SPI_1 */
#ifdef CONFIG_SPI_2
#ifdef CONFIG_SPI_STM32_USE_HW_SS
{STM32_PIN_PB12, STM32F4_PINMUX_FUNC_PB12_SPI2_NSS},
#endif /* CONFIG_SPI_STM32_USE_HW_SS */
{STM32_PIN_PB13, STM32F4_PINMUX_FUNC_PB13_SPI2_SCK},
{STM32_PIN_PB14, STM32F4_PINMUX_FUNC_PB14_SPI2_MISO},
{STM32_PIN_PB15, STM32F4_PINMUX_FUNC_PB15_SPI2_MOSI},