pinctrl: mvebu: fix num_settings in mpp group assignment

When assigning mpp settings from static mpp modes to mpp groups,
we do not want any groups that have no supported setting for a
specific Kirkwood variant. However, when there is at least a
single supported setting, we need to assign the number of all
settings in this mode to grp->num_settings as we are reusing
the static modes table.

Fixes: 0581b16b1840 ("pinctrl: mvebu: complain about missing group after checking variant")
Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Gregory Clement <gregory.clement@free-electrons.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/mvebu/pinctrl-mvebu.c b/drivers/pinctrl/mvebu/pinctrl-mvebu.c
index e4d4738..3ef798f 100644 (file)
--- a/drivers/pinctrl/mvebu/pinctrl-mvebu.c
+++ b/drivers/pinctrl/mvebu/pinctrl-mvebu.c
@@ -666,16 +666,19 @@ int mvebu_pinctrl_probe(struct platform_device *pdev)
                struct mvebu_mpp_ctrl_setting *set = &mode->settings[0];
                struct mvebu_pinctrl_group *grp;
                unsigned num_settings;
+               unsigned supp_settings;
 
-               for (num_settings = 0; ; set++) {
+               for (num_settings = 0, supp_settings = 0; ; set++) {
                        if (!set->name)
                                break;
 
+                       num_settings++;
+
                        /* skip unsupported settings for this variant */
                        if (pctl->variant && !(pctl->variant & set->variant))
                                continue;
 
-                       num_settings++;
+                       supp_settings++;
 
                        /* find gpio/gpo/gpi settings */
                        if (strcmp(set->name, "gpio") == 0)
@@ -688,7 +691,7 @@ int mvebu_pinctrl_probe(struct platform_device *pdev)
                }
 
                /* skip modes with no settings for this variant */
-               if (!num_settings)
+               if (!supp_settings)
                        continue;
 
                grp = mvebu_pinctrl_find_group_by_pid(pctl, mode->pid);