[nrf fromtree] drivers: spi: nrf: add support for SPIS120 instance

SPIS120 is a SPI slave device with >8 MHz SCK compatibility.

Signed-off-by: Nikodem Kastelik <[email protected]>
(cherry picked from commit f13c8a5)

Author: nika-nordic

drivers/spi/spi_nrfx_spis.c

@@ -8,6 +8,7 @@
 #include <zephyr/drivers/spi/rtio.h>
 #include <zephyr/drivers/pinctrl.h>
 #include <zephyr/drivers/gpio.h>
+#include <dmm.h>
 #include <soc.h>
 #include <nrfx_spis.h>
 #include <zephyr/pm/device.h>
@@ -40,6 +41,7 @@ struct spi_nrfx_config {
 #endif
 	const struct pinctrl_dev_config *pcfg;
 	struct gpio_dt_spec wake_gpio;
+	void *mem_reg;
 };
 
 static inline nrf_spis_mode_t get_nrf_spis_mode(uint16_t operation)
@@ -125,7 +127,11 @@ static int prepare_for_transfer(const struct device *dev,
 				uint8_t *rx_buf, size_t rx_buf_len)
 {
 	const struct spi_nrfx_config *dev_config = dev->config;
+	struct spi_nrfx_data *dev_data = dev->data;
 	nrfx_err_t result;
+	uint8_t *dmm_tx_buf;
+	uint8_t *dmm_rx_buf;
+	int err;
 
 	if (tx_buf_len > dev_config->max_buf_len ||
 	    rx_buf_len > dev_config->max_buf_len) {
@@ -134,14 +140,36 @@ static int prepare_for_transfer(const struct device *dev,
 		return -EINVAL;
 	}
 
+	err = dmm_buffer_out_prepare(dev_config->mem_reg, tx_buf, tx_buf_len, (void **)&dmm_tx_buf);
+	if (err != 0) {
+		LOG_ERR("DMM TX allocation failed err=%d", err);
+		goto out_alloc_failed;
+	}
+
+	/* Keep user RX buffer address to copy data from DMM RX buffer on transfer completion. */
+	dev_data->ctx.rx_buf = rx_buf;
+	err = dmm_buffer_in_prepare(dev_config->mem_reg, rx_buf, rx_buf_len, (void **)&dmm_rx_buf);
+	if (err != 0) {
+		LOG_ERR("DMM RX allocation failed err=%d", err);
+		goto in_alloc_failed;
+	}
+
 	result = nrfx_spis_buffers_set(&dev_config->spis,
-				       tx_buf, tx_buf_len,
-				       rx_buf, rx_buf_len);
+				       dmm_tx_buf, tx_buf_len,
+				       dmm_rx_buf, rx_buf_len);
 	if (result != NRFX_SUCCESS) {
-		return -EIO;
+		err = -EIO;
+		goto buffers_set_failed;
 	}
 
 	return 0;
+
+buffers_set_failed:
+	dmm_buffer_in_release(dev_config->mem_reg, rx_buf, rx_buf_len, rx_buf);
+in_alloc_failed:
+	dmm_buffer_out_release(dev_config->mem_reg, (void *)tx_buf);
+out_alloc_failed:
+	return err;
 }
 
 static void wake_callback(const struct device *dev, struct gpio_callback *cb,
@@ -288,9 +316,22 @@ static DEVICE_API(spi, spi_nrfx_driver_api) = {
 
 static void event_handler(const nrfx_spis_evt_t *p_event, void *p_context)
 {
-	struct spi_nrfx_data *dev_data = p_context;
+	const struct device *dev = p_context;
+	struct spi_nrfx_data *dev_data = dev->data;
+	const struct spi_nrfx_config *dev_config = dev->config;
 
 	if (p_event->evt_type == NRFX_SPIS_XFER_DONE) {
+		int err;
+
+
+		err = dmm_buffer_out_release(dev_config->mem_reg, p_event->p_tx_buf);
+		(void)err;
+		__ASSERT_NO_MSG(err == 0);
+
+		err = dmm_buffer_in_release(dev_config->mem_reg, dev_data->ctx.rx_buf,
+				      p_event->rx_amount, p_event->p_rx_buf);
+		__ASSERT_NO_MSG(err == 0);
+
 		spi_context_complete(&dev_data->ctx, dev_data->dev,
 				     p_event->rx_amount);
 
@@ -361,7 +402,7 @@ static int spi_nrfx_init(const struct device *dev)
 	 * actually used are set in configure() when a transfer is prepared.
 	 */
 	result = nrfx_spis_init(&dev_config->spis, &dev_config->config,
-				event_handler, dev_data);
+				event_handler, (void *)dev);
 
 	if (result != NRFX_SUCCESS) {
 		LOG_ERR("Failed to initialize device: %s", dev->name);
@@ -416,7 +457,10 @@ static int spi_nrfx_init(const struct device *dev)
  * - Name-based HAL IRQ handlers, e.g. nrfx_spis_0_irq_handler
  */
 
-#define SPIS(idx) DT_NODELABEL(spi##idx)
+#define SPIS_NODE(idx) COND_CODE_1(IS_EQ(idx, 120), (spis##idx), (spi##idx))
+
+#define SPIS(idx) DT_NODELABEL(SPIS_NODE(idx))
+
 #define SPIS_PROP(idx, prop) DT_PROP(SPIS(idx), prop)
 
 #define SPI_NRFX_SPIS_DEFINE(idx)					       \
@@ -453,6 +497,7 @@ static int spi_nrfx_init(const struct device *dev)
 			(.gpd_ctrl = NRF_PERIPH_GET_FREQUENCY(SPIS(idx)) >     \
 				NRFX_MHZ_TO_HZ(16UL),))			       \
 		.wake_gpio = GPIO_DT_SPEC_GET_OR(SPIS(idx), wake_gpios, {0}),  \
+		.mem_reg = DMM_DEV_TO_REG(SPIS(idx)),			       \
 	};								       \
 	BUILD_ASSERT(!DT_NODE_HAS_PROP(SPIS(idx), wake_gpios) ||	       \
 		     !(DT_GPIO_FLAGS(SPIS(idx), wake_gpios) & GPIO_ACTIVE_LOW),\