diff options
| author | Marcelo Schmitt <marcelo.schmitt@analog.com> | 2024-07-12 16:21:23 -0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-07-29 01:19:53 +0100 |
| commit | 927d382c7efbcc2206c31fa2f672fa264c0f1d5b (patch) | |
| tree | 2dcd51aba27bce490fc1bc03f4f27e70a7c85b71 /drivers/spi/spi-gpio.c | |
| parent | 320f6693097bf89d67f9cabad24a2b911e23073f (diff) | |
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 <nuno.sa@analog.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
Link: https://patch.msgid.link/629c55a10005ba26825c3a6a19184372ef81b3e1.1720810545.git.marcelo.schmitt@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-gpio.c')
| -rw-r--r-- | drivers/spi/spi-gpio.c | 12 |
1 files changed, 11 insertions, 1 deletions
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; |