[PATCH 1/3] soc: xilinx: decouple chip ID retrieval from direct firmware calls

Akshay Belsare <[email protected]> Thu, 20 Aug 2026 20:24:17 +0530
Newsgroups	org.u-boot-project.lists.u-boot
Message-ID	<[email protected]>
All four Xilinx SoC drivers contain identical
IS_ENABLED(CONFIG_ZYNQMP_FIRMWARE) conditionals to retrieve the
chip ID. Move this logic behind xilinx_pm_get_chipid(), using a
weak default implementation for each platform and a common override
in firmware-zynqmp.c.

As part of this refactoring, move the ZynqMP weak default
implementation to mach-zynqmp/cpu.c to align with the other supported
platforms. Also declare xilinx_pm_get_chipid() in sys_proto.h instead
of zynqmp_firmware.h, as the SoC drivers no longer require direct
dependencies on firmware-specific definitions.

Signed-off-by: Akshay Belsare <[email protected]>
---
 arch/arm/mach-versal-net/cpu.c                | 13 +++++++++++
 .../mach-versal-net/include/mach/sys_proto.h  |  2 ++
 arch/arm/mach-versal/cpu.c                    | 13 +++++++++++
 arch/arm/mach-versal/include/mach/sys_proto.h |  2 ++
 arch/arm/mach-versal2/cpu.c                   | 13 +++++++++++
 .../arm/mach-versal2/include/mach/sys_proto.h |  2 ++
 arch/arm/mach-zynqmp/cpu.c                    |  8 +++++++
 arch/arm/mach-zynqmp/include/mach/sys_proto.h |  2 ++
 drivers/firmware/firmware-zynqmp.c            | 17 ++++++++++++++
 drivers/soc/soc_amd_versal2.c                 | 23 ++++++-------------
 drivers/soc/soc_xilinx_versal.c               | 23 ++++++-------------
 drivers/soc/soc_xilinx_versal_net.c           | 23 ++++++-------------
 drivers/soc/soc_xilinx_zynqmp.c               | 21 ++++++-----------
 13 files changed, 100 insertions(+), 62 deletions(-)

diff --git a/arch/arm/mach-versal-net/cpu.c b/arch/arm/mach-versal-net/cpu.c
index 7df7c49ac71..54d8496a5e8 100644
--- a/arch/arm/mach-versal-net/cpu.c
+++ b/arch/arm/mach-versal-net/cpu.c
@@ -11,6 +11,7 @@
 #include <malloc.h>
 #include <time.h>
 #include <vsprintf.h>
+#include <linux/errno.h>
 #include <asm/armv8/mmu.h>
 #include <asm/cache.h>
 #include <asm/global_data.h>
@@ -237,6 +238,18 @@ bool soc_detection(void)
 	return true;
 }
 
+__weak int xilinx_pm_get_chipid(u32 *idcode, u32 *version)
+{
+	if (idcode)
+		*idcode = 0;
+
+	*version = readl(PMC_TAP_VERSION);
+	if (!*version)
+		return -EINVAL;
+
+	return 0;
+}
+
 U_BOOT_DRVINFO(soc_xilinx_versal_net) = {
 	.name = "soc_xilinx_versal_net",
 };
diff --git a/arch/arm/mach-versal-net/include/mach/sys_proto.h b/arch/arm/mach-versal-net/include/mach/sys_proto.h
index 4907dae1108..bfe9df76b0b 100644
--- a/arch/arm/mach-versal-net/include/mach/sys_proto.h
+++ b/arch/arm/mach-versal-net/include/mach/sys_proto.h
@@ -13,3 +13,5 @@ void versal_net_timer_setup(void);
 u8 versal_net_get_bootmode(void);
 /* Direct MMIO read of the bootmode register (EL3 / no-firmware path) */
 u32 versal_net_bootmode_reg(void);
+/* Overridable chip ID accessor: weak MMIO default, firmware override */
+int xilinx_pm_get_chipid(u32 *idcode, u32 *version);
diff --git a/arch/arm/mach-versal/cpu.c b/arch/arm/mach-versal/cpu.c
index 7521d45bc1a..15b3303bd1c 100644
--- a/arch/arm/mach-versal/cpu.c
+++ b/arch/arm/mach-versal/cpu.c
@@ -9,6 +9,7 @@
 #include <init.h>
 #include <log.h>
 #include <time.h>
+#include <linux/errno.h>
 #include <asm/armv8/mmu.h>
 #include <asm/cache.h>
 #include <asm/global_data.h>
@@ -178,6 +179,18 @@ u8 __weak versal_get_bootmode(void)
 	return reg & BOOT_MODES_MASK;
 }
 
+__weak int xilinx_pm_get_chipid(u32 *idcode, u32 *version)
+{
+	if (idcode)
+		*idcode = 0;
+
+	*version = readl(VERSAL_PS_PMC_VERSION);
+	if (!*version)
+		return -EINVAL;
+
+	return 0;
+}
+
 U_BOOT_DRVINFO(soc_xilinx_versal) = {
 	.name = "soc_xilinx_versal",
 };
diff --git a/arch/arm/mach-versal/include/mach/sys_proto.h b/arch/arm/mach-versal/include/mach/sys_proto.h
index cb373e6fad9..bff4659eb8f 100644
--- a/arch/arm/mach-versal/include/mach/sys_proto.h
+++ b/arch/arm/mach-versal/include/mach/sys_proto.h
@@ -27,5 +27,7 @@ u8 versal_get_bootmode(void);
 u32 versal_bootmode_reg(void);
 /* EL3 clock/timer register setup, called from board_early_init_r() */
 void versal_timer_setup(void);
+/* Overridable chip ID accessor: weak MMIO default, firmware override */
+int xilinx_pm_get_chipid(u32 *idcode, u32 *version);
 
 #endif /* _ASM_ARCH_SYS_PROTO_H */
diff --git a/arch/arm/mach-versal2/cpu.c b/arch/arm/mach-versal2/cpu.c
index d72f66f4fba..fc7cdbaaa65 100644
--- a/arch/arm/mach-versal2/cpu.c
+++ b/arch/arm/mach-versal2/cpu.c
@@ -12,6 +12,7 @@
 #include <time.h>
 #include <vsprintf.h>
 #include <wait_bit.h>
+#include <linux/errno.h>
 #include <asm/armv8/mmu.h>
 #include <asm/cache.h>
 #include <asm/global_data.h>
@@ -310,6 +311,18 @@ bool soc_detection(void)
 	return true;
 }
 
+__weak int xilinx_pm_get_chipid(u32 *idcode, u32 *version)
+{
+	if (idcode)
+		*idcode = 0;
+
+	*version = readl(PMC_TAP_VERSION);
+	if (!*version)
+		return -EINVAL;
+
+	return 0;
+}
+
 U_BOOT_DRVINFO(soc_amd_versal2) = {
 	.name = "soc_amd_versal2",
 };
diff --git a/arch/arm/mach-versal2/include/mach/sys_proto.h b/arch/arm/mach-versal2/include/mach/sys_proto.h
index d678adf9c26..1a23f8dd425 100644
--- a/arch/arm/mach-versal2/include/mach/sys_proto.h
+++ b/arch/arm/mach-versal2/include/mach/sys_proto.h
@@ -21,6 +21,8 @@ u32 versal2_multi_boot_reg(void);
 u8 versal2_get_bootmode(void);
 /* EL3 clock/timer register setup, called from board_early_init_r() */
 void versal2_timer_setup(void);
+/* Overridable chip ID accessor: weak MMIO default, firmware override */
+int xilinx_pm_get_chipid(u32 *idcode, u32 *version);
 
 int zynqmp_pm_wait_mphy_tx_rx_config_ready(u32 timeout_us);
 int zynqmp_pm_wait_sram_init_done(u32 timeout_us);
diff --git a/arch/arm/mach-zynqmp/cpu.c b/arch/arm/mach-zynqmp/cpu.c
index 088cc962189..c7328970fe5 100644
--- a/arch/arm/mach-zynqmp/cpu.c
+++ b/arch/arm/mach-zynqmp/cpu.c
@@ -214,6 +214,14 @@ int __weak zynqmp_mmio_read(const u32 address, u32 *value)
 	return -EINVAL;
 }
 
+__weak int xilinx_pm_get_chipid(u32 *idcode, u32 *version)
+{
+	if (idcode)
+		*idcode = 0;
+
+	return zynqmp_mmio_read(ZYNQMP_PS_VERSION, version);
+}
+
 void zynqmp_timer_setup(void)
 {
 	u32 val;
diff --git a/arch/arm/mach-zynqmp/include/mach/sys_proto.h b/arch/arm/mach-zynqmp/include/mach/sys_proto.h
index d2bb10ffcbb..e791c2da74f 100644
--- a/arch/arm/mach-zynqmp/include/mach/sys_proto.h
+++ b/arch/arm/mach-zynqmp/include/mach/sys_proto.h
@@ -59,5 +59,7 @@ void zynqmp_timer_setup(void);
 /* Direct MMIO accessors (EL3/SPL or no-firmware path) */
 int zynqmp_mmio_rawread(const u32 address, u32 *value);
 int zynqmp_mmio_rawwrite(const u32 address, const u32 mask, const u32 value);
+/* Overridable chip ID accessor: weak MMIO default, firmware override */
+int xilinx_pm_get_chipid(u32 *idcode, u32 *version);
 
 #endif /* _ASM_ARCH_SYS_PROTO_H */
diff --git a/drivers/firmware/firmware-zynqmp.c b/drivers/firmware/firmware-zynqmp.c
index fae66ccb3d8..ad759849fe4 100644
--- a/drivers/firmware/firmware-zynqmp.c
+++ b/drivers/firmware/firmware-zynqmp.c
@@ -175,6 +175,23 @@ unsigned int zynqmp_firmware_version(void)
 	return pm_api_version;
 };
 
+int xilinx_pm_get_chipid(u32 *idcode, u32 *version)
+{
+	u32 ret_payload[PAYLOAD_ARG_CNT];
+	int ret;
+
+	ret = xilinx_pm_request(PM_GET_CHIPID, 0, 0, 0, 0, 0, 0, ret_payload);
+	if (ret)
+		return ret;
+
+	if (idcode)
+		*idcode = ret_payload[1];
+	if (version)
+		*version = ret_payload[2];
+
+	return 0;
+}
+
 #if defined(CONFIG_ARCH_VERSAL2)
 /*
  * Poll the M-PHY TX/RX config-ready status until it settles or @timeout_us
diff --git a/drivers/soc/soc_amd_versal2.c b/drivers/soc/soc_amd_versal2.c
index 7f06c1e70bc..d31c6deec45 100644
--- a/drivers/soc/soc_amd_versal2.c
+++ b/drivers/soc/soc_amd_versal2.c
@@ -7,9 +7,8 @@
 
 #include <dm.h>
 #include <soc.h>
-#include <zynqmp_firmware.h>
-#include <asm/io.h>
 #include <asm/arch/hardware.h>
+#include <asm/arch/sys_proto.h>
 
 #include <linux/bitfield.h>
 
@@ -48,23 +47,15 @@ static const struct soc_ops soc_amd_versal2_ops = {
 static int soc_amd_versal2_probe(struct udevice *dev)
 {
 	struct soc_amd_versal2_priv *priv = dev_get_priv(dev);
-	u32 ret_payload[PAYLOAD_ARG_CNT];
+	u32 version;
 	int ret;
 
-	priv->family = versal2_family;
-
-	if (IS_ENABLED(CONFIG_ZYNQMP_FIRMWARE)) {
-		ret = xilinx_pm_request(PM_GET_CHIPID, 0, 0, 0, 0,
-					0, 0, ret_payload);
-		if (ret)
-			return ret;
-	} else {
-		ret_payload[2] = readl(PMC_TAP_VERSION);
-		if (!ret_payload[2])
-			return -EINVAL;
-	}
+	ret = xilinx_pm_get_chipid(NULL, &version);
+	if (ret)
+		return ret;
 
-	priv->revision = FIELD_GET(PS_VERSION_MASK, ret_payload[2]);
+	priv->family = versal2_family;
+	priv->revision = FIELD_GET(PS_VERSION_MASK, version);
 
 	return 0;
 }
diff --git a/drivers/soc/soc_xilinx_versal.c b/drivers/soc/soc_xilinx_versal.c
index c43a80df1fc..ff6eb873d8a 100644
--- a/drivers/soc/soc_xilinx_versal.c
+++ b/drivers/soc/soc_xilinx_versal.c
@@ -7,9 +7,8 @@
 
 #include <dm.h>
 #include <soc.h>
-#include <zynqmp_firmware.h>
-#include <asm/io.h>
 #include <asm/arch/hardware.h>
+#include <asm/arch/sys_proto.h>
 
 /*
  * v1 -> 0x10 - ES1
@@ -44,23 +43,15 @@ static const struct soc_ops soc_xilinx_versal_ops = {
 static int soc_xilinx_versal_probe(struct udevice *dev)
 {
 	struct soc_xilinx_versal_priv *priv = dev_get_priv(dev);
-	u32 ret_payload[PAYLOAD_ARG_CNT];
+	u32 version;
 	int ret;
 
-	priv->family = versal_family;
-
-	if (IS_ENABLED(CONFIG_ZYNQMP_FIRMWARE)) {
-		ret = xilinx_pm_request(PM_GET_CHIPID, 0, 0, 0, 0,
-					0, 0, ret_payload);
-		if (ret)
-			return ret;
-	} else {
-		ret_payload[2] = readl(VERSAL_PS_PMC_VERSION);
-		if (!ret_payload[2])
-			return -EINVAL;
-	}
+	ret = xilinx_pm_get_chipid(NULL, &version);
+	if (ret)
+		return ret;
 
-	priv->revision = ret_payload[2] >> VERSAL_PS_VER_SHIFT;
+	priv->family = versal_family;
+	priv->revision = version >> VERSAL_PS_VER_SHIFT;
 
 	return 0;
 }
diff --git a/drivers/soc/soc_xilinx_versal_net.c b/drivers/soc/soc_xilinx_versal_net.c
index 210f9f8f8fd..3218cc416f7 100644
--- a/drivers/soc/soc_xilinx_versal_net.c
+++ b/drivers/soc/soc_xilinx_versal_net.c
@@ -7,9 +7,8 @@
 
 #include <dm.h>
 #include <soc.h>
-#include <zynqmp_firmware.h>
-#include <asm/io.h>
 #include <asm/arch/hardware.h>
+#include <asm/arch/sys_proto.h>
 
 #include <linux/bitfield.h>
 
@@ -46,23 +45,15 @@ static const struct soc_ops soc_xilinx_versal_net_ops = {
 static int soc_xilinx_versal_net_probe(struct udevice *dev)
 {
 	struct soc_xilinx_versal_net_priv *priv = dev_get_priv(dev);
-	u32 ret_payload[PAYLOAD_ARG_CNT];
+	u32 version;
 	int ret;
 
-	priv->family = versal_family;
-
-	if (IS_ENABLED(CONFIG_ZYNQMP_FIRMWARE)) {
-		ret = xilinx_pm_request(PM_GET_CHIPID, 0, 0, 0, 0,
-					0, 0, ret_payload);
-		if (ret)
-			return ret;
-	} else {
-		ret_payload[2] = readl(PMC_TAP_VERSION);
-		if (!ret_payload[2])
-			return -EINVAL;
-	}
+	ret = xilinx_pm_get_chipid(NULL, &version);
+	if (ret)
+		return ret;
 
-	priv->revision = FIELD_GET(PS_VERSION_MASK, ret_payload[2]);
+	priv->family = versal_family;
+	priv->revision = FIELD_GET(PS_VERSION_MASK, version);
 
 	return 0;
 }
diff --git a/drivers/soc/soc_xilinx_zynqmp.c b/drivers/soc/soc_xilinx_zynqmp.c
index 0e13e230914..1dc0b05a1a3 100644
--- a/drivers/soc/soc_xilinx_zynqmp.c
+++ b/drivers/soc/soc_xilinx_zynqmp.c
@@ -13,7 +13,6 @@
 #include <dm/device_compat.h>
 #include <asm/cache.h>
 #include <soc.h>
-#include <zynqmp_firmware.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/arch/hardware.h>
 
@@ -400,22 +399,17 @@ static const struct soc_ops soc_xilinx_zynqmp_ops = {
 static int soc_xilinx_zynqmp_probe(struct udevice *dev)
 {
 	struct soc_xilinx_zynqmp_priv *priv = dev_get_priv(dev);
-	u32 ret_payload[PAYLOAD_ARG_CNT];
+	u32 idcode = 0, version;
 	int ret;
 
-	priv->family = zynqmp_family;
-
-	if (!IS_ENABLED(CONFIG_ZYNQMP_FIRMWARE))
-		ret = zynqmp_mmio_read(ZYNQMP_PS_VERSION, &ret_payload[2]);
-	else
-		ret = xilinx_pm_request(PM_GET_CHIPID, 0, 0, 0, 0,
-					0, 0, ret_payload);
+	ret = xilinx_pm_get_chipid(&idcode, &version);
 	if (ret < 0)
 		return ret;
 
-	priv->revision = ret_payload[2] & ZYNQMP_PS_VER_MASK;
+	priv->family = zynqmp_family;
+	priv->revision = version & ZYNQMP_PS_VER_MASK;
 
-	if (IS_ENABLED(CONFIG_ZYNQMP_FIRMWARE)) {
+	if (idcode) {
 		/*
 		 * Firmware returns:
 		 * payload[0][31:0] = status of the operation
@@ -424,9 +418,8 @@ static int soc_xilinx_zynqmp_probe(struct udevice *dev)
 		 * payload[2][28:20] = EXTENDED_IDCODE
 		 * payload[2][29] = PL_INIT
 		 */
-		u32 idcode = ret_payload[1];
-		u32 idcode2 = ret_payload[2] >>
-				   ZYNQMP_CSU_VERSION_EMPTY_SHIFT;
+		u32 idcode2 = version >> ZYNQMP_CSU_VERSION_EMPTY_SHIFT;
+
 		dev_dbg(dev, "IDCODE: 0x%0x, IDCODE2: 0x%0x\n", idcode,
 			idcode2);
 
-- 
2.34.1