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pinctrl: sh-pfc: Validate pin tables at runtime

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Extend the run-time debug code with checks to ensure there are no
conflicting pin names, numbers, or enumeration values.

This helps catching bugs early.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Geert Uytterhoeven 2019-03-27 11:41:36 +01:00
parent 3dd5fd79f0
commit 542ffc9e02
1 changed files with 29 additions and 0 deletions
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29
drivers/pinctrl/sh-pfc/core.c
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@ -773,6 +773,35 @@ static void __init sh_pfc_check_info(const struct sh_pfc_soc_info *info)
pr_info("Checking %s\n", drvname);
/* Check pins */
for (i = 0; i < info->nr_pins; i++) {
for (j = 0; j < i; j++) {
if (!strcmp(info->pins[i].name, info->pins[j].name)) {
pr_err("%s: pin %s/%s: name conflict\n",
drvname, info->pins[i].name,
info->pins[j].name);
sh_pfc_errors++;
}
if (info->pins[i].pin != (u16)-1 &&
info->pins[i].pin == info->pins[j].pin) {
pr_err("%s: pin %s/%s: pin %u conflict\n",
drvname, info->pins[i].name,
info->pins[j].name, info->pins[i].pin);
sh_pfc_errors++;
}
if (info->pins[i].enum_id &&
info->pins[i].enum_id == info->pins[j].enum_id) {
pr_err("%s: pin %s/%s: enum_id %u conflict\n",
drvname, info->pins[i].name,
info->pins[j].name,
info->pins[i].enum_id);
sh_pfc_errors++;
}
}
}
/* Check groups and functions */
refcnts = kcalloc(info->nr_groups, sizeof(*refcnts), GFP_KERNEL);
if (!refcnts)