spi: orion: Add multiple chip select support to spi-orion (23244404) · Commits · 戴 / test

drivers/spi/spi-orion.c

+14 −1

Original line number	Diff line number	Diff line
		@@ -28,7 +28,12 @@
		/* Runtime PM autosuspend timeout: PM is fairly light on this driver */
		#define SPI_AUTOSUSPEND_TIMEOUT 200

		#define ORION_NUM_CHIPSELECTS 1 /* only one slave is supported*/
		/* Some SoCs using this driver support up to 8 chip selects.
		* It is up to the implementer to only use the chip selects
		* that are available.
		*/
		#define ORION_NUM_CHIPSELECTS 8

		#define ORION_SPI_WAIT_RDY_MAX_LOOP 2000 /* in usec */

		#define ORION_SPI_IF_CTRL_REG 0x00
		@@ -44,6 +49,10 @@
		#define ARMADA_SPI_CLK_PRESCALE_MASK 0xDF
		#define ORION_SPI_MODE_MASK (ORION_SPI_MODE_CPOL \| \
		ORION_SPI_MODE_CPHA)
		#define ORION_SPI_CS_MASK 0x1C
		#define ORION_SPI_CS_SHIFT 2
		#define ORION_SPI_CS(cs) ((cs << ORION_SPI_CS_SHIFT) & \
		ORION_SPI_CS_MASK)

		enum orion_spi_type {
		ORION_SPI,
		@@ -221,6 +230,10 @@ static void orion_spi_set_cs(struct spi_device *spi, bool enable)

		orion_spi = spi_master_get_devdata(spi->master);

		orion_spi_clrbits(orion_spi, ORION_SPI_IF_CTRL_REG, ORION_SPI_CS_MASK);
		orion_spi_setbits(orion_spi, ORION_SPI_IF_CTRL_REG,
		ORION_SPI_CS(spi->chip_select));

		/* Chip select logic is inverted from spi_set_cs */
		if (!enable)
		orion_spi_setbits(orion_spi, ORION_SPI_IF_CTRL_REG, 0x1);