[PATCH v2 1/2] imx: Add SPI NOR A/B switching support

[fedor.ross at ifm.com]

From: Marek Vasut <marex at nabladev.com>

Query the SM via SCMI, obtain rom_passover_t->img_set_sel and based on
that, add 0 or 0x400000 offset (A or B copy offset) to boot container
read address.

Signed-off-by: Marek Vasut <marex at nabladev.com>
Signed-off-by: Fedor Ross <fedor.ross at ifm.com>
---
 arch/arm/include/asm/arch-imx9/sys_proto.h |  2 ++
 arch/arm/mach-imx/image-container.c        |  8 +++++++-
 arch/arm/mach-imx/imx9/scmi/soc.c          | 13 +++++++++++++
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/arch/arm/include/asm/arch-imx9/sys_proto.h b/arch/arm/include/asm/arch-imx9/sys_proto.h
index dead7a99a66..73df8715f22 100644
--- a/arch/arm/include/asm/arch-imx9/sys_proto.h
+++ b/arch/arm/include/asm/arch-imx9/sys_proto.h
@@ -23,6 +23,8 @@ int low_drive_freq_update(void *blob);
 enum imx9_soc_voltage_mode soc_target_voltage_mode(void);
 int get_reset_reason(bool sys, bool lm);
 
+u8 imx95_detect_secondary_image_boot(void);
+
 #define is_voltage_mode(mode) (soc_target_voltage_mode() == (mode))
 
 #endif
diff --git a/arch/arm/mach-imx/image-container.c b/arch/arm/mach-imx/image-container.c
index 7bfcc9d7e9d..63cf8596316 100644
--- a/arch/arm/mach-imx/image-container.c
+++ b/arch/arm/mach-imx/image-container.c
@@ -225,9 +225,15 @@ static bool check_secondary_cnt_set(unsigned long *set_off)
 			}
 		}
 	}
-#endif
+#elif IS_ENABLED(CONFIG_IMX95)
+	u8 img_set_sel = imx95_detect_secondary_image_boot();
+
+	*set_off = img_set_sel ? 0x400000 : 0;
 
+	return !!img_set_sel;
+#else
 	return false;
+#endif
 }
 
 static unsigned long get_boot_device_offset(void *dev, int dev_type)
diff --git a/arch/arm/mach-imx/imx9/scmi/soc.c b/arch/arm/mach-imx/imx9/scmi/soc.c
index fbee435786c..330b276b23a 100644
--- a/arch/arm/mach-imx/imx9/scmi/soc.c
+++ b/arch/arm/mach-imx/imx9/scmi/soc.c
@@ -745,6 +745,19 @@ void build_info(void)
 	puts("\n");
 }
 
+#if IS_ENABLED(CONFIG_IMX95)
+u8 imx95_detect_secondary_image_boot(void)
+{
+	rom_passover_t rdata = { 0 };
+	int ret = scmi_get_rom_data(&rdata);
+
+	if (!ret)
+		return rdata.img_set_sel;
+
+	return 0;
+}
+#endif
+
 int arch_misc_init(void)
 {
 	build_info();

-- 
2.47.3