[PATCH] arm64: zynqmp: Also support JTAG as alternative boot mode

[Michal Simek]

if (reg >> BOOT_MODE_ALT_SHIFT) condition rules out alternative jtag boot
mode which is 0. When 0 was used origin(HW) boot mode was used instead.
That's why directly fill reg variable with requested boot mode and don't
let code to read value back. "else" part of code remain unchanged.

Signed-off-by: Michal Simek <michal.simek at amd.com>
---

 arch/arm/mach-zynqmp/spl.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-zynqmp/spl.c b/arch/arm/mach-zynqmp/spl.c
index 5af735aa5cef..979ff3aef6c2 100644
--- a/arch/arm/mach-zynqmp/spl.c
+++ b/arch/arm/mach-zynqmp/spl.c
@@ -91,13 +91,14 @@ u32 spl_boot_device(void)
 
 #if defined(CONFIG_SPL_ZYNQMP_ALT_BOOTMODE_ENABLED)
 	/* Change default boot mode at run-time */
+	reg = CONFIG_SPL_ZYNQMP_ALT_BOOTMODE;
 	writel(CONFIG_SPL_ZYNQMP_ALT_BOOTMODE << BOOT_MODE_ALT_SHIFT,
 	       &crlapb_base->boot_mode);
-#endif
-
+#else
 	reg = readl(&crlapb_base->boot_mode);
 	if (reg >> BOOT_MODE_ALT_SHIFT)
 		reg >>= BOOT_MODE_ALT_SHIFT;
+#endif
 
 	bootmode = reg & BOOT_MODES_MASK;
 
-- 
2.36.1