spi: rspi: Get rid of unused struct rspi_plat_data

No in-kernel users of struct rspi_plat_data. If required,
the software nodes should be used for such users. For now
just get rid of it.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://msgid.link/r/20240325142118.3210915-1-andriy.shevchenko@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-rspi.c

@@ -24,7 +24,6 @@
 #include <linux/reset.h>
 #include <linux/sh_dma.h>
 #include <linux/spi/spi.h>
-#include <linux/spi/rspi.h>
 #include <linux/spinlock.h>
 
 #define RSPI_SPCR		0x00	/* Control Register */
@@ -1131,16 +1130,12 @@ static struct dma_chan *rspi_request_dma_chan(struct device *dev,
 static int rspi_request_dma(struct device *dev, struct spi_controller *ctlr,
 			    const struct resource *res)
 {
-	const struct rspi_plat_data *rspi_pd = dev_get_platdata(dev);
 	unsigned int dma_tx_id, dma_rx_id;
 
 	if (dev->of_node) {
 		/* In the OF case we will get the slave IDs from the DT */
 		dma_tx_id = 0;
 		dma_rx_id = 0;
-	} else if (rspi_pd && rspi_pd->dma_tx_id && rspi_pd->dma_rx_id) {
-		dma_tx_id = rspi_pd->dma_tx_id;
-		dma_rx_id = rspi_pd->dma_rx_id;
 	} else {
 		/* The driver assumes no error. */
 		return 0;
@@ -1290,7 +1285,6 @@ static int rspi_probe(struct platform_device *pdev)
 	struct spi_controller *ctlr;
 	struct rspi_data *rspi;
 	int ret;
-	const struct rspi_plat_data *rspi_pd;
 	const struct spi_ops *ops;
 	unsigned long clksrc;
 
@@ -1305,11 +1299,7 @@ static int rspi_probe(struct platform_device *pdev)
 			goto error1;
 	} else {
 		ops = (struct spi_ops *)pdev->id_entry->driver_data;
-		rspi_pd = dev_get_platdata(&pdev->dev);
-		if (rspi_pd && rspi_pd->num_chipselect)
-			ctlr->num_chipselect = rspi_pd->num_chipselect;
-		else
-			ctlr->num_chipselect = 2; /* default */
+		ctlr->num_chipselect = 2; /* default */
 	}
 
 	rspi = spi_controller_get_devdata(ctlr);

include/linux/spi/rspi.h

-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Renesas SPI driver
- *
- * Copyright (C) 2012  Renesas Solutions Corp.
- */
-
-#ifndef __LINUX_SPI_RENESAS_SPI_H__
-#define __LINUX_SPI_RENESAS_SPI_H__
-
-struct rspi_plat_data {
-	unsigned int dma_tx_id;
-	unsigned int dma_rx_id;
-
-	u16 num_chipselect;
-};
-
-#endif