serial: 8250_uniphier: Use dev_err_probe() in probe error paths

devm_clk_get_enabled() returns -EPROBE_DEFER while the clock provider is
not registered yet, and uniphier_uart_probe() reports that with
dev_err(). Every retry of an intermittently deferred probe therefore
prints "failed to get and enable clock" at error level, which is only
dmesg noise.

Use dev_err_probe() instead: it demotes -EPROBE_DEFER to dev_dbg() and
records the reason for /sys/kernel/debug/devices_deferred. Convert the
other two error messages in probe as well, so the whole function follows
the "return dev_err_probe()" pattern already used by other 8250 drivers
such as 8250_em.c. Those two codes are never -EPROBE_DEFER, so there the
conversion is a readability change only.

Errors other than a deferral are still logged at error level, now with
the error code added by the helper. No functional change otherwise.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Malathi A <malathi.a2000@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20260918074546.245342-1-malathi.a2000@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions