4  * SPDX-License-Identifier: Apache-2.0
31 static int spi_config(const struct device *dev, uint32_t frequency,  in spi_config()  argument
38 		return -ENOTSUP;  in spi_config()
42 		return -ENOTSUP;  in spi_config()
46 		return -ENOTSUP;  in spi_config()
49 	/* Set the SPI frequency */  in spi_config()
50 	div = (SPI_CFG(dev)->f_sys / (frequency * 2U)) - 1;  in spi_config()
55 		/* If CPOL is set, then SCK idles at logical 1 */  in spi_config()
58 		/* SCK idles at logical 0 */  in spi_config()
66 		 * on the trailing SCK edge  in spi_config()
70 		/* Data is sampled on the leading SCK edge */  in spi_config()
77 		return -ENOTSUP;  in spi_config()
87 		return -ENOTSUP;  in spi_config()
129 	struct spi_context *ctx = &SPI_DATA(dev)->ctx;  in spi_sifive_xfer()
142 			txd = *ctx->tx_buf;  in spi_sifive_xfer()
156 				*ctx->rx_buf = rxd;  in spi_sifive_xfer()
158 			queued_frames--;  in spi_sifive_xfer()
165 		spi_context_cs_control(&SPI_DATA(dev)->ctx, false);  in spi_sifive_xfer()
179 	struct spi_sifive_cfg *cfg = (struct spi_sifive_cfg *)dev->config;  in spi_sifive_init()
184 	err = spi_context_cs_configure_all(&SPI_DATA(dev)->ctx);  in spi_sifive_init()
190 	err = pinctrl_apply_state(cfg->pcfg, PINCTRL_STATE_DEFAULT);  in spi_sifive_init()
197 	spi_context_unlock_unconditionally(&SPI_DATA(dev)->ctx);  in spi_sifive_init()
210 	spi_context_lock(&SPI_DATA(dev)->ctx, false, NULL, NULL, config);  in spi_sifive_transceive()
213 	SPI_DATA(dev)->ctx.config = config;  in spi_sifive_transceive()
237 		sys_write32(config->slave, SPI_REG(dev, REG_CSID));  in spi_sifive_transceive()
241 	rc = spi_config(dev, config->frequency, config->operation);  in spi_sifive_transceive()
243 		spi_context_release(&SPI_DATA(dev)->ctx, rc);  in spi_sifive_transceive()
247 	spi_context_buffers_setup(&SPI_DATA(dev)->ctx, tx_bufs, rx_bufs, 1);  in spi_sifive_transceive()
251 		spi_context_cs_control(&SPI_DATA(dev)->ctx, true);  in spi_sifive_transceive()
259 	rc = spi_context_wait_for_completion(&SPI_DATA(dev)->ctx);  in spi_sifive_transceive()
261 	spi_context_release(&SPI_DATA(dev)->ctx, rc);  in spi_sifive_transceive()
269 	spi_context_unlock_unconditionally(&SPI_DATA(dev)->ctx);  in spi_sifive_release()