Add support for the %pV format-specifier which allows printing a
struct va_format. This is used by the Linux kernel for recursive
printf() formatting and is needed by the ext4l filesystem driver.
Add the struct to include/linux/printk.h to match the kernel location.
Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
Add documentation for the tiny printf implementation used in SPL, TPL,
and VPL when CONFIG_SPL_USE_TINY_PRINTF (or equivalent) is enabled.
Document the supported format specifiers, limitations, and the warning
about snprintf() not performing bounds checking in this implementation.
Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
Expand the printf format documentation to include information on all
printf-style functions. Mention CONFIG depencies as well.
Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
