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arm64: zynqmp: Also support JTAG as alternative boot mode

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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.

Reviewed-by: Sean Anderson <sean.anderson@linux.dev>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/ed51a9d51948ab939a53e0b9dc6c2d2546f97a4f.1710933505.git.michal.simek@amd.com
This commit is contained in:
Michal Simek
2024-03-20 12:18:35 +01:00
parent 3d3cb2857e
commit d8821736d5
1 changed files with 3 additions and 2 deletions
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5
arch/arm/mach-zynqmp/spl.c
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@@ -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;