clk: meson: vid-pll-div: remove warning and return 0 on invalid config

The vid_pll_div is a programmable fractional divider, but vendor gives a
limited of known configuration value and it's corresponding fraction.

Thus when at reset value (0) or unknown value, we cannot determine the
result rate.

The initial behaviour was to print a warning, but the warning triggers
at each boot and when the clock tree is refreshed.

This patch moves the print to debug and returns 0 instead of the
parent rate.

Fixes: 72dbb8c94d0d ("clk: meson: Add vid_pll divider driver")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lkml.kernel.org/r/20190327151348.27402-1-narmstrong@baylibre.com

diff --git a/drivers/clk/meson/vid-pll-div.c b/drivers/clk/meson/vid-pll-div.c
index 08bcc01c0923863790d32dafbc1274bdf2358a28..daff235bc763348a03bebdcd9695cc8e08856744 100644 (file)
--- a/drivers/clk/meson/vid-pll-div.c
+++ b/drivers/clk/meson/vid-pll-div.c
@@ -82,8 +82,8 @@ static unsigned long meson_vid_pll_div_recalc_rate(struct clk_hw *hw,
        div = _get_table_val(meson_parm_read(clk->map, &pll_div->val),
                             meson_parm_read(clk->map, &pll_div->sel));
        if (!div || !div->divider) {
-               pr_info("%s: Invalid config value for vid_pll_div\n", __func__);
-               return parent_rate;
+               pr_debug("%s: Invalid config value for vid_pll_div\n", __func__);
+               return 0;
        }
 
        return DIV_ROUND_UP_ULL(parent_rate * div->multiplier, div->divider);