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staging: mt7621-pinctrl: refactor rt2880_pinctrl_dt_node_to_map function

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Using 'function' and 'group' bindings in the device tree give the
posibility of refactor 'rt2880_pinctrl_dt_node_to_map' and simplify
it a lot. Make use of 'for_each_node_with_property' function to count
number of groups for the node and iterate over the groups using
'of_property_for_each_string' calling 'pinctrl_utils_add_map_mux'
function which is the same of the custom function in this driver code
'rt2880_pinctrl_dt_subnode_to_map' which is not needed anymore.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sergio Paracuellos 2018-06-28 21:03:06 +02:00 committed by Greg Kroah-Hartman
parent d7461eab5a
commit e12a1a6e08
1 changed files with 15 additions and 43 deletions
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58
drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c
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@ -83,65 +83,37 @@ static void rt2880_pinctrl_pin_dbg_show(struct pinctrl_dev *pctrldev,
seq_puts(s, "ralink pio");
}
static void rt2880_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctrldev,
struct device_node *np,
struct pinctrl_map **map)
{
const char *function;
int func = of_property_read_string(np, "ralink,function", &function);
int grps = of_property_count_strings(np, "ralink,group");
int i;
if (func || !grps)
return;
for (i = 0; i < grps; i++) {
const char *group;
of_property_read_string_index(np, "ralink,group", i, &group);
(*map)->type = PIN_MAP_TYPE_MUX_GROUP;
(*map)->name = function;
(*map)->data.mux.group = group;
(*map)->data.mux.function = function;
(*map)++;
}
}
static int rt2880_pinctrl_dt_node_to_map(struct pinctrl_dev *pctrldev,
struct device_node *np_config,
struct pinctrl_map **map,
unsigned int *num_maps)
{
struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
struct property *prop;
const char *function_name, *group_name;
int ret;
int max_maps = 0;
int ngroups;
unsigned int reserved_maps = 0;
struct pinctrl_map *tmp;
struct device_node *np;
for_each_child_of_node(np_config, np) {
int ret = of_property_count_strings(np, "ralink,group");
if (ret >= 0)
max_maps += ret;
}
if (!max_maps)
return max_maps;
for_each_node_with_property(np_config, "group")
ngroups++;
ret = pinctrl_utils_reserve_map(pctrldev, map, &reserved_maps,
num_maps, max_maps);
num_maps, ngroups);
if (ret) {
dev_err(p->dev, "can't reserve map: %d\n", ret);
return ret;
}
tmp = *map;
for_each_child_of_node(np_config, np)
rt2880_pinctrl_dt_subnode_to_map(pctrldev, np, &tmp);
*num_maps = max_maps;
of_property_for_each_string(np_config, "group", prop, group_name) {
ret = pinctrl_utils_add_map_mux(pctrldev, map, &reserved_maps,
num_maps, group_name,
function_name);
if (ret) {
dev_err(p->dev, "can't add map: %d\n", ret);
return ret;
}
}
return 0;
}