openwrt/target/linux/bcm27xx/patches-6.1/950-0718-mmc-bcm2835-Use-phys-addresses-for-slave-DMA-config.patch

From 69939eb84658f25f2300a34c3f7719ac05c86dec Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Thu, 11 May 2023 16:25:46 +0100
Subject: [PATCH] mmc: bcm2835: Use phys addresses for slave DMA config

Contrary to what struct snd_dmaengine_dai_dma_data suggests, the
configuration of addresses of DMA slave interfaces should be done in
CPU physical addresses.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
 drivers/mmc/host/bcm2835.c | 17 +++--------------
 1 file changed, 3 insertions(+), 14 deletions(-)

--- a/drivers/mmc/host/bcm2835.c
+++ b/drivers/mmc/host/bcm2835.c
@@ -38,7 +38,6 @@
 #include <linux/io.h>
 #include <linux/iopoll.h>
 #include <linux/module.h>
-#include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/platform_device.h>
 #include <linux/scatterlist.h>
@@ -1355,8 +1354,8 @@ static int bcm2835_probe(struct platform
 	struct device *dev = &pdev->dev;
 	struct clk *clk;
 	struct bcm2835_host *host;
+	struct resource *iomem;
 	struct mmc_host *mmc;
-	const __be32 *regaddr_p;
 	int ret;
 
 	dev_dbg(dev, "%s\n", __func__);
@@ -1369,23 +1368,13 @@ static int bcm2835_probe(struct platform
 	host->pdev = pdev;
 	spin_lock_init(&host->lock);
 
-	host->ioaddr = devm_platform_ioremap_resource(pdev, 0);
+	host->ioaddr = devm_platform_get_and_ioremap_resource(pdev, 0, &iomem);
 	if (IS_ERR(host->ioaddr)) {
 		ret = PTR_ERR(host->ioaddr);
 		goto err;
 	}
 
-	/* Parse OF address directly to get the physical address for
-	 * DMA to our registers.
-	 */
-	regaddr_p = of_get_address(pdev->dev.of_node, 0, NULL, NULL);
-	if (!regaddr_p) {
-		dev_err(dev, "Can't get phys address\n");
-		ret = -EINVAL;
-		goto err;
-	}
-
-	host->phys_addr = be32_to_cpup(regaddr_p);
+	host->phys_addr = iomem->start;
 
 	host->dma_chan = NULL;
 	host->dma_desc = NULL;