From 927d382c7efbcc2206c31fa2f672fa264c0f1d5b Mon Sep 17 00:00:00 2001 From: Marcelo Schmitt Date: Fri, 12 Jul 2024 16:21:23 -0300 Subject: [PATCH] spi: spi-gpio: Add support for MOSI idle state configuration Implement MOSI idle low and MOSI idle high to better support peripherals that request specific MOSI behavior. Acked-by: Nuno Sa Reviewed-by: David Lechner Reviewed-by: Jonathan Cameron Signed-off-by: Marcelo Schmitt Link: https://patch.msgid.link/629c55a10005ba26825c3a6a19184372ef81b3e1.1720810545.git.marcelo.schmitt@analog.com Signed-off-by: Mark Brown --- drivers/spi/spi-gpio.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-gpio.c b/drivers/spi/spi-gpio.c index 36c587be9e28..4f192e013cd6 100644 --- a/drivers/spi/spi-gpio.c +++ b/drivers/spi/spi-gpio.c @@ -236,6 +236,14 @@ static void spi_gpio_chipselect(struct spi_device *spi, int is_active) } } +static void spi_gpio_set_mosi_idle(struct spi_device *spi) +{ + struct spi_gpio *spi_gpio = spi_to_spi_gpio(spi); + + gpiod_set_value_cansleep(spi_gpio->mosi, + !!(spi->mode & SPI_MOSI_IDLE_HIGH)); +} + static int spi_gpio_setup(struct spi_device *spi) { struct gpio_desc *cs; @@ -389,7 +397,8 @@ static int spi_gpio_probe(struct platform_device *pdev) host->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32); host->mode_bits = SPI_3WIRE | SPI_3WIRE_HIZ | SPI_CPHA | SPI_CPOL | - SPI_CS_HIGH | SPI_LSB_FIRST; + SPI_CS_HIGH | SPI_LSB_FIRST | SPI_MOSI_IDLE_LOW | + SPI_MOSI_IDLE_HIGH; if (!spi_gpio->mosi) { /* HW configuration without MOSI pin * @@ -414,6 +423,7 @@ static int spi_gpio_probe(struct platform_device *pdev) host->flags |= SPI_CONTROLLER_GPIO_SS; bb->chipselect = spi_gpio_chipselect; bb->set_line_direction = spi_gpio_set_direction; + bb->set_mosi_idle = spi_gpio_set_mosi_idle; if (host->flags & SPI_CONTROLLER_NO_TX) { bb->txrx_word[SPI_MODE_0] = spi_gpio_spec_txrx_word_mode0;