linux-kernel - [PATCH v2 3/4] spi: aspeed: Use phys_addr_t for bus addresses to support 64-bit platforms

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Message-ID: <20251114101042.1520997-4-chin-ting_kuo@aspeedtech.com>
Date: Fri, 14 Nov 2025 18:10:41 +0800
From: Chin-Ting Kuo <chin-ting_kuo@...eedtech.com>
To: <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
	<joel@....id.au>, <andrew@...econstruct.com.au>, <clg@...d.org>,
	<clg@...hat.com>, <broonie@...nel.org>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-aspeed@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>, <openbmc@...ts.ozlabs.org>,
	<linux-spi@...r.kernel.org>, <BMC-SW@...eedtech.com>
Subject: [PATCH v2 3/4] spi: aspeed: Use phys_addr_t for bus addresses to support 64-bit platforms

Update bus address types from u32 to phys_addr_t to support systems with
64-bit memory address space. This change ensures compatibility with
upcoming SoCs that extend the system bus beyond 32-bit, while maintaining
support for existing platforms.

Signed-off-by: Chin-Ting Kuo <chin-ting_kuo@...eedtech.com>
---
 drivers/spi/spi-aspeed-smc.c | 32 +++++++++++++++++---------------
 1 file changed, 17 insertions(+), 15 deletions(-)

diff --git a/drivers/spi/spi-aspeed-smc.c b/drivers/spi/spi-aspeed-smc.c
index 4163632fed8b..d1a8bdf6d540 100644
--- a/drivers/spi/spi-aspeed-smc.c
+++ b/drivers/spi/spi-aspeed-smc.c
@@ -82,9 +82,10 @@ struct aspeed_spi_data {
 	u32	hdiv_max;
 	u32	min_window_size;
 
-	u32 (*segment_start)(struct aspeed_spi *aspi, u32 reg);
-	u32 (*segment_end)(struct aspeed_spi *aspi, u32 reg);
-	u32 (*segment_reg)(struct aspeed_spi *aspi, u32 start, u32 end);
+	phys_addr_t (*segment_start)(struct aspeed_spi *aspi, u32 reg);
+	phys_addr_t (*segment_end)(struct aspeed_spi *aspi, u32 reg);
+	u32 (*segment_reg)(struct aspeed_spi *aspi, phys_addr_t start,
+			   phys_addr_t end);
 	int (*adjust_window)(struct aspeed_spi *aspi);
 	u32 (*get_clk_div)(struct aspeed_spi_chip *chip, u32 hz);
 	int (*calibrate)(struct aspeed_spi_chip *chip, u32 hdiv,
@@ -97,7 +98,7 @@ struct aspeed_spi {
 	const struct aspeed_spi_data	*data;
 
 	void __iomem		*regs;
-	u32			 ahb_base_phy;
+	phys_addr_t		 ahb_base_phy;
 	u32			 ahb_window_size;
 	u32			 num_cs;
 	struct device		*dev;
@@ -484,9 +485,9 @@ static int aspeed_spi_chip_set_default_window(struct aspeed_spi *aspi)
 	/* Assign the minimum window size to each CS */
 	for (cs = 0; cs < aspi->num_cs; cs++) {
 		aspi->chips[cs].ahb_window_size = aspi->data->min_window_size;
-		dev_dbg(aspi->dev, "CE%d default window [ 0x%.8x - 0x%.8x ]",
-			cs, aspi->ahb_base_phy + aspi->data->min_window_size * cs,
-			aspi->ahb_base_phy + aspi->data->min_window_size * cs - 1);
+		dev_dbg(aspi->dev, "CE%d default window [ 0x%.9llx - 0x%.9llx ]",
+			cs, (u64)(aspi->ahb_base_phy + aspi->data->min_window_size * cs),
+			(u64)(aspi->ahb_base_phy + aspi->data->min_window_size * cs - 1));
 	}
 
 	/* Close unused CS */
@@ -930,17 +931,18 @@ static void aspeed_spi_remove(struct platform_device *pdev)
  * The address range is encoded with absolute addresses in the overall
  * mapping window.
  */
-static u32 aspeed_spi_segment_start(struct aspeed_spi *aspi, u32 reg)
+static phys_addr_t aspeed_spi_segment_start(struct aspeed_spi *aspi, u32 reg)
 {
 	return ((reg >> 16) & 0xFF) << 23;
 }
 
-static u32 aspeed_spi_segment_end(struct aspeed_spi *aspi, u32 reg)
+static phys_addr_t aspeed_spi_segment_end(struct aspeed_spi *aspi, u32 reg)
 {
 	return ((reg >> 24) & 0xFF) << 23;
 }
 
-static u32 aspeed_spi_segment_reg(struct aspeed_spi *aspi, u32 start, u32 end)
+static u32 aspeed_spi_segment_reg(struct aspeed_spi *aspi,
+				  phys_addr_t start, phys_addr_t end)
 {
 	return (((start >> 23) & 0xFF) << 16) | (((end >> 23) & 0xFF) << 24);
 }
@@ -952,16 +954,16 @@ static u32 aspeed_spi_segment_reg(struct aspeed_spi *aspi, u32 start, u32 end)
 
 #define AST2600_SEG_ADDR_MASK 0x0ff00000
 
-static u32 aspeed_spi_segment_ast2600_start(struct aspeed_spi *aspi,
-					    u32 reg)
+static phys_addr_t aspeed_spi_segment_ast2600_start(struct aspeed_spi *aspi,
+						    u32 reg)
 {
 	u32 start_offset = (reg << 16) & AST2600_SEG_ADDR_MASK;
 
 	return aspi->ahb_base_phy + start_offset;
 }
 
-static u32 aspeed_spi_segment_ast2600_end(struct aspeed_spi *aspi,
-					  u32 reg)
+static phys_addr_t aspeed_spi_segment_ast2600_end(struct aspeed_spi *aspi,
+						  u32 reg)
 {
 	u32 end_offset = reg & AST2600_SEG_ADDR_MASK;
 
@@ -973,7 +975,7 @@ static u32 aspeed_spi_segment_ast2600_end(struct aspeed_spi *aspi,
 }
 
 static u32 aspeed_spi_segment_ast2600_reg(struct aspeed_spi *aspi,
-					  u32 start, u32 end)
+					  phys_addr_t start, phys_addr_t end)
 {
 	/* disable zero size segments */
 	if (start == end)
-- 
2.34.1