Merge https://source.denx.de/u-boot/custodians/u-boot-riscv

- Assorted warning fixes, io read/write bugfix

arch/riscv/include/asm/io.h

@@ -44,15 +44,15 @@ static inline phys_addr_t map_to_sysmem(const void *ptr)
  * read/writes.  We define __arch_*[bl] here, and leave __arch_*w
  * to the architecture specific code.
  */
-#define __arch_getb(a)			(*(unsigned char *)(a))
-#define __arch_getw(a)			(*(unsigned short *)(a))
-#define __arch_getl(a)			(*(unsigned int *)(a))
-#define __arch_getq(a)			(*(unsigned long long *)(a))
+#define __arch_getb(a)			(*(volatile unsigned char *)(a))
+#define __arch_getw(a)			(*(volatile unsigned short *)(a))
+#define __arch_getl(a)			(*(volatile unsigned int *)(a))
+#define __arch_getq(a)			(*(volatile unsigned long long *)(a))
 
-#define __arch_putb(v, a)		(*(unsigned char *)(a) = (v))
-#define __arch_putw(v, a)		(*(unsigned short *)(a) = (v))
-#define __arch_putl(v, a)		(*(unsigned int *)(a) = (v))
-#define __arch_putq(v, a)		(*(unsigned long long *)(a) = (v))
+#define __arch_putb(v, a)		(*(volatile unsigned char *)(a) = (v))
+#define __arch_putw(v, a)		(*(volatile unsigned short *)(a) = (v))
+#define __arch_putl(v, a)		(*(volatile unsigned int *)(a) = (v))
+#define __arch_putq(v, a)		(*(volatile unsigned long long *)(a) = (v))
 
 #define __raw_writeb(v, a)		__arch_putb(v, a)
 #define __raw_writew(v, a)		__arch_putw(v, a)

board/sifive/unleashed/unleashed.c

@@ -118,10 +118,10 @@ void *board_fdt_blob_setup(void)
 {
 	if (IS_ENABLED(CONFIG_OF_SEPARATE)) {
 		if (gd->arch.firmware_fdt_addr)
-			return (ulong *)gd->arch.firmware_fdt_addr;
-		else
-			return (ulong *)&_end;
+			return (ulong *)(uintptr_t)gd->arch.firmware_fdt_addr;
 	}
+
+	return (ulong *)&_end;
 }
 
 int board_init(void)

board/sifive/unmatched/unmatched.c

@@ -15,10 +15,10 @@ void *board_fdt_blob_setup(void)
 {
 	if (IS_ENABLED(CONFIG_OF_SEPARATE)) {
 		if (gd->arch.firmware_fdt_addr)
-			return (ulong *)gd->arch.firmware_fdt_addr;
-		else
-			return (ulong *)&_end;
+			return (ulong *)(uintptr_t)gd->arch.firmware_fdt_addr;
 	}
+
+	return (ulong *)&_end;
 }
 
 int board_init(void)

drivers/cache/cache-sifive-ccache.c

@@ -38,7 +38,7 @@ static int sifive_ccache_get_info(struct udevice *dev, struct cache_info *info)
 {
 	struct sifive_ccache *priv = dev_get_priv(dev);
 
-	info->base = (phys_addr_t)priv->base;
+	info->base = (uintptr_t)priv->base;
 
 	return 0;
 }

drivers/clk/sifive/sifive-prci.c

@@ -653,9 +653,9 @@ static int sifive_prci_probe(struct udevice *dev)
 	struct prci_clk_desc *data =
 		(struct prci_clk_desc *)dev_get_driver_data(dev);
 
-	pd->va = (void *)dev_read_addr(dev);
-	if (IS_ERR(pd->va))
-		return PTR_ERR(pd->va);
+	pd->va = dev_read_addr_ptr(dev);
+	if (!pd->va)
+		return -EINVAL;
 
 	err = clk_get_by_index(dev, 0, &pd->parent_hfclk);
 	if (err)

drivers/core/fdtaddr.c

@@ -93,6 +93,13 @@ fdt_addr_t devfdt_get_addr_index(const struct udevice *dev, int index)
 #endif
 }
 
+void *devfdt_get_addr_index_ptr(const struct udevice *dev, int index)
+{
+	fdt_addr_t addr = devfdt_get_addr_index(dev, index);
+
+	return (addr == FDT_ADDR_T_NONE) ? NULL : (void *)(uintptr_t)addr;
+}
+
 fdt_addr_t devfdt_get_addr_size_index(const struct udevice *dev, int index,
 				      fdt_size_t *size)
 {
@@ -155,9 +162,7 @@ fdt_addr_t devfdt_get_addr(const struct udevice *dev)
 
 void *devfdt_get_addr_ptr(const struct udevice *dev)
 {
-	fdt_addr_t addr = devfdt_get_addr_index(dev, 0);
-
-	return (addr == FDT_ADDR_T_NONE) ? NULL : (void *)(uintptr_t)addr;
+	return devfdt_get_addr_index_ptr(dev, 0);
 }
 
 void *devfdt_remap_addr_index(const struct udevice *dev, int index)

drivers/gpio/sifive-gpio.c

@@ -157,13 +157,11 @@ static const struct dm_gpio_ops sifive_gpio_ops = {
 static int sifive_gpio_of_to_plat(struct udevice *dev)
 {
 	struct sifive_gpio_plat *plat = dev_get_plat(dev);
-	fdt_addr_t addr;
 
-	addr = dev_read_addr(dev);
-	if (addr == FDT_ADDR_T_NONE)
+	plat->base = dev_read_addr_ptr(dev);
+	if (!plat->base)
 		return -EINVAL;
 
-	plat->base = (void *)addr;
 	return 0;
 }
 

drivers/i2c/ocores_i2c.c

@@ -516,7 +516,7 @@ static int ocores_i2c_probe(struct udevice *dev)
 	u32 clock_frequency_khz;
 	int ret;
 
-	bus->base = (void __iomem *)devfdt_get_addr(dev);
+	bus->base = dev_read_addr_ptr(dev);
 
 	if (dev_read_u32(dev, "reg-shift", &bus->reg_shift)) {
 		/* no 'reg-shift', check for deprecated 'regstep' */

drivers/net/macb.c

@@ -574,14 +574,9 @@ static int macb_phy_find(struct macb_device *macb, const char *name)
 #ifdef CONFIG_DM_ETH
 static int macb_sifive_clk_init(struct udevice *dev, ulong rate)
 {
-	fdt_addr_t addr;
 	void *gemgxl_regs;
 
-	addr = dev_read_addr_index(dev, 1);
-	if (addr == FDT_ADDR_T_NONE)
-		return -ENODEV;
-
-	gemgxl_regs = (void __iomem *)addr;
+	gemgxl_regs = dev_read_addr_index_ptr(dev, 1);
 	if (!gemgxl_regs)
 		return -ENODEV;
 
@@ -1383,7 +1378,7 @@ static int macb_eth_probe(struct udevice *dev)
 		macb->phy_addr = ofnode_read_u32_default(phandle_args.node,
 							 "reg", -1);
 
-	macb->regs = (void *)pdata->iobase;
+	macb->regs = (void *)(uintptr_t)pdata->iobase;
 
 	macb->is_big_endian = (cpu_to_be32(0x12345678) == 0x12345678);
 
@@ -1444,7 +1439,7 @@ static int macb_eth_of_to_plat(struct udevice *dev)
 {
 	struct eth_pdata *pdata = dev_get_plat(dev);
 
-	pdata->iobase = (phys_addr_t)dev_remap_addr(dev);
+	pdata->iobase = (uintptr_t)dev_remap_addr(dev);
 	if (!pdata->iobase)
 		return -EINVAL;
 

drivers/ram/sifive/sifive_ddr.c

@@ -313,7 +313,7 @@ static int sifive_ddr_setup(struct udevice *dev)
 	sifive_ddr_phy_fixup(denali_phy);
 
 	/* check size */
-	priv->info.size = get_ram_size((long *)priv->info.base,
+	priv->info.size = get_ram_size((long *)(uintptr_t)priv->info.base,
 				       ddr_size);
 
 	debug("%s : %lx\n", __func__, (uintptr_t)priv->info.size);
@@ -369,9 +369,9 @@ static int sifive_ddr_probe(struct udevice *dev)
 		return ret;
 	}
 
-	priv->ctl = (struct sifive_ddrctl *)dev_read_addr_index(dev, 0);
-	priv->phy = (struct sifive_ddrphy *)dev_read_addr_index(dev, 1);
-	priv->physical_filter_ctrl = (u32 *)dev_read_addr_index(dev, 2);
+	priv->ctl = (struct sifive_ddrctl *)dev_read_addr_index_ptr(dev, 0);
+	priv->phy = (struct sifive_ddrphy *)dev_read_addr_index_ptr(dev, 1);
+	priv->physical_filter_ctrl = (u32 *)dev_read_addr_index_ptr(dev, 2);
 
 	return sifive_ddr_setup(dev);
 #endif

include/dm/fdtaddr.h

@@ -92,6 +92,18 @@ void *devfdt_map_physmem(const struct udevice *dev, unsigned long size);
  */
 fdt_addr_t devfdt_get_addr_index(const struct udevice *dev, int index);
 
+/**
+ * devfdt_get_addr_index_ptr() - Return indexed pointer to the address of the
+ *                               reg property of a device
+ *
+ * @dev: Pointer to a device
+ * @index: the 'reg' property can hold a list of <addr, size> pairs
+ *	   and @index is used to select which one is required
+ *
+ * @return Pointer to addr, or NULL if there is no such property
+ */
+void *devfdt_get_addr_index_ptr(const struct udevice *dev, int index);
+
 /**
  * devfdt_get_addr_size_index() - Get the indexed reg property of a device
  *

include/dm/read.h

@@ -180,6 +180,18 @@ int dev_read_size(const struct udevice *dev, const char *propname);
  */
 fdt_addr_t dev_read_addr_index(const struct udevice *dev, int index);
 
+/**
+ * dev_read_addr_index_ptr() - Get the indexed reg property of a device
+ *                             as a pointer
+ *
+ * @dev: Device to read from
+ * @index: the 'reg' property can hold a list of <addr, size> pairs
+ *	   and @index is used to select which one is required
+ *
+ * @return pointer or NULL if not found
+ */
+void *dev_read_addr_index_ptr(const struct udevice *dev, int index);
+
 /**
  * dev_read_addr_size_index() - Get the indexed reg property of a device
  *
@@ -805,6 +817,12 @@ static inline fdt_addr_t dev_read_addr_index(const struct udevice *dev,
 	return devfdt_get_addr_index(dev, index);
 }
 
+static inline void *dev_read_addr_index_ptr(const struct udevice *dev,
+					    int index)
+{
+	return devfdt_get_addr_index_ptr(dev, index);
+}
+
 static inline fdt_addr_t dev_read_addr_size_index(const struct udevice *dev,
 						  int index,
 						  fdt_size_t *size)