diff options
| author | Sergio Paracuellos <sergio.paracuellos@gmail.com> | 2019-01-04 12:34:08 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-07 11:28:13 +0100 |
| commit | 0ca1f90861b6d64386261096b42bfc81ce11948a (patch) | |
| tree | d6ac8ba8ab1af52bc8e9dff88087377e218998f4 /drivers/staging/mt7621-pinctrl | |
| parent | 9a47dc5f7eb3ad9a7145f43e19a2bc19b1073bfc (diff) | |
staging: mt7621-pinctrl: use pinconf-generic for 'dt_node_to_map' and 'dt_free_map'
Instead of reimplement afunction to do 'dt_node_to_map' task like
'rt2880_pinctrl_dt_node_to_map' make use of 'pinconf_generic_dt_node_to_map_all'
generic function for this task. Also use its equivalent function for free which
is 'pinconf_generic_dt_free_map'. Remove 'rt2880_pinctrl_dt_node_to_map' function
which is not needed anymore. This decrease a bit driver LOC and make it more
generic. To properly compile this changes 'GENERIC_PINCONF' option is selected
with the driver in its Kconfig file.
This also fix a problem with function 'rt2880_pinctrl_dt_node_to_map' which was
calling internally 'pinctrl_utils_reserve_map' which expects 'num_maps' to be initialized.
It does a memory allocation based on the value, and triggers the following
warning if is not properly set:
if (unlikely(order >= MAX_ORDER)) {
WARN_ON_ONCE(!(gfp_mask & __GFP_NOWARN));
return NULL;
}
Generic function 'pinconf_generic_dt_node_to_map_all' initializes properly
'num_maps' to zero fixing the problem.
Fixes: e12a1a6e087b ("staging: mt7621-pinctrl: refactor rt2880_pinctrl_dt_node_to_map function")
Reported-by: NeilBrown <neil@brown.name>
Tested-by: NeilBrown <neil@brown.name>
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/mt7621-pinctrl')
| -rw-r--r-- | drivers/staging/mt7621-pinctrl/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c | 41 |
2 files changed, 4 insertions, 38 deletions
diff --git a/drivers/staging/mt7621-pinctrl/Kconfig b/drivers/staging/mt7621-pinctrl/Kconfig index 37cf9c3273be..fc3612711307 100644 --- a/drivers/staging/mt7621-pinctrl/Kconfig +++ b/drivers/staging/mt7621-pinctrl/Kconfig @@ -2,3 +2,4 @@ config PINCTRL_RT2880 bool "RT2800 pinctrl driver for RALINK/Mediatek SOCs" depends on RALINK select PINMUX + select GENERIC_PINCONF diff --git a/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c b/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c index aa98fbb17013..80e7067cfb79 100644 --- a/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c +++ b/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c @@ -11,6 +11,7 @@ #include <linux/of.h> #include <linux/pinctrl/pinctrl.h> #include <linux/pinctrl/pinconf.h> +#include <linux/pinctrl/pinconf-generic.h> #include <linux/pinctrl/pinmux.h> #include <linux/pinctrl/consumer.h> #include <linux/pinctrl/machine.h> @@ -73,48 +74,12 @@ static int rt2880_get_group_pins(struct pinctrl_dev *pctrldev, return 0; } -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 ngroups = 0; - unsigned int reserved_maps = 0; - - for_each_node_with_property(np_config, "group") - ngroups++; - - *map = NULL; - ret = pinctrl_utils_reserve_map(pctrldev, map, &reserved_maps, - num_maps, ngroups); - if (ret) { - dev_err(p->dev, "can't reserve map: %d\n", ret); - return ret; - } - - 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; -} - static const struct pinctrl_ops rt2880_pctrl_ops = { .get_groups_count = rt2880_get_group_count, .get_group_name = rt2880_get_group_name, .get_group_pins = rt2880_get_group_pins, - .dt_node_to_map = rt2880_pinctrl_dt_node_to_map, - .dt_free_map = pinctrl_utils_free_map, + .dt_node_to_map = pinconf_generic_dt_node_to_map_all, + .dt_free_map = pinconf_generic_dt_free_map, }; static int rt2880_pmx_func_count(struct pinctrl_dev *pctrldev) |