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gpio: aggregator: Replace custom get_arg() with a generic next_arg()

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cmdline library provides next_arg() helper to traverse over parameters
and their values given in command line. Replace custom approach in the driver
by it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
This commit is contained in:
Andy Shevchenko 2021-03-01 18:59:32 +02:00 committed by Bartosz Golaszewski
parent 65dd36a39d
commit ac505b6f5f
1 changed files with 5 additions and 34 deletions
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39
drivers/gpio/gpio-aggregator.c
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@ -37,31 +37,6 @@ struct gpio_aggregator {
static DEFINE_MUTEX(gpio_aggregator_lock); /* protects idr */
static DEFINE_IDR(gpio_aggregator_idr);
static char *get_arg(char **args)
{
char *start, *end;
start = skip_spaces(*args);
if (!*start)
return NULL;
if (*start == '"') {
/* Quoted arg */
end = strchr(++start, '"');
if (!end)
return ERR_PTR(-EINVAL);
} else {
/* Unquoted arg */
for (end = start; *end && !isspace(*end); end++) ;
}
if (*end)
*end++ = '\0';
*args = end;
return start;
}
static int aggr_add_gpio(struct gpio_aggregator *aggr, const char *key,
int hwnum, unsigned int *n)
{
@ -83,8 +58,8 @@ static int aggr_add_gpio(struct gpio_aggregator *aggr, const char *key,
static int aggr_parse(struct gpio_aggregator *aggr)
{
char *args = skip_spaces(aggr->args);
char *name, *offsets, *p;
char *args = aggr->args;
unsigned long *bitmap;
unsigned int i, n = 0;
int error = 0;
@ -93,13 +68,9 @@ static int aggr_parse(struct gpio_aggregator *aggr)
if (!bitmap)
return -ENOMEM;
for (name = get_arg(&args), offsets = get_arg(&args); name;
offsets = get_arg(&args)) {
if (IS_ERR(name)) {
pr_err("Cannot get GPIO specifier: %pe\n", name);
error = PTR_ERR(name);
goto free_bitmap;
}
args = next_arg(args, &name, &p);
while (*args) {
args = next_arg(args, &offsets, &p);
p = get_options(offsets, 0, &error);
if (error == 0 || *p) {
@ -125,7 +96,7 @@ static int aggr_parse(struct gpio_aggregator *aggr)
goto free_bitmap;
}
name = get_arg(&args);
args = next_arg(args, &name, &p);
}
if (!n) {