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pinctrl: extract pinctrl_generic_to_map() from pinctrl_generic_pins_function_dt_node_to_map()

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Refactor pinctrl_generic_pins_function_dt_subnode_to_map() by separating DT
parsing logic from map creation. Introduce a new helper
pinctrl_generic_to_map() to handle mapping to kernel data structures, while
keeping DT property parsing in the subnode function.

Improve code structure and enables easier reuse for platforms using
different DT properties (e.g. pinmux) without modifying the
dt_node_to_map-style callback API. Avoid unnecessary coupling to
pinctrl_generic_pins_function_dt_node_to_map(), which provides
functionality not needed when the phandle target is unambiguous.

Maximize code reuse and provide a cleaner extension point for future
pinctrl drivers.

Suggested-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>
This commit is contained in:
Frank Li
2026-05-04 19:54:37 -04:00
committed by Linus Walleij
parent 9e5e1de61d
commit aaaf31be04
2 changed files with 74 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/pinctrl/pinconf.h
View File

@@ -172,6 +172,13 @@ int pinctrl_generic_pins_function_dt_node_to_map(struct pinctrl_dev *pctldev,
struct device_node *np,
struct pinctrl_map **maps,
unsigned int *num_maps);
int pinctrl_generic_to_map(struct pinctrl_dev *pctldev, struct device_node *parent,
struct device_node *np, struct pinctrl_map **maps,
unsigned int *num_maps, unsigned int *num_reserved_maps,
const char **group_name, unsigned int ngroups,
const char **functions, unsigned int *pins,
unsigned int npins);
#else
static inline int
pinctrl_generic_pins_function_dt_node_to_map(struct pinctrl_dev *pctldev,
@@ -181,4 +188,15 @@ pinctrl_generic_pins_function_dt_node_to_map(struct pinctrl_dev *pctldev,
{
return -ENOTSUPP;
}
static inline int
pinctrl_generic_to_map(struct pinctrl_dev *pctldev, struct device_node *parent,
struct device_node *np, struct pinctrl_map **maps,
unsigned int *num_maps, unsigned int *num_reserved_maps,
const char **group_name, unsigned int ngroups,
const char **functions, unsigned int *pins,
void *function_data)
{
return -ENOTSUPP;
}
#endif

95
drivers/pinctrl/pinctrl-generic.c
View File

@@ -17,29 +17,18 @@
#include "pinctrl-utils.h"
#include "pinmux.h"
static int pinctrl_generic_pins_function_dt_subnode_to_map(struct pinctrl_dev *pctldev,
struct device_node *parent,
struct device_node *np,
struct pinctrl_map **maps,
unsigned int *num_maps,
unsigned int *num_reserved_maps,
const char **group_names,
unsigned int ngroups)
int pinctrl_generic_to_map(struct pinctrl_dev *pctldev, struct device_node *parent,
struct device_node *np, struct pinctrl_map **maps,
unsigned int *num_maps, unsigned int *num_reserved_maps,
const char **group_names, unsigned int ngroups,
const char **functions, unsigned int *pins,
unsigned int npins)
{
struct device *dev = pctldev->dev;
const char **functions;
unsigned int num_configs;
const char *group_name;
unsigned long *configs;
unsigned int num_configs, pin, *pins;
int npins, ret, reserve = 1;
npins = of_property_count_u32_elems(np, "pins");
if (npins < 1) {
dev_err(dev, "invalid pinctrl group %pOFn.%pOFn %d\n",
parent, np, npins);
return npins;
}
int ret, reserve = 1;
group_name = devm_kasprintf(dev, GFP_KERNEL, "%pOFn.%pOFn", parent, np);
if (!group_name)
@@ -47,26 +36,6 @@ static int pinctrl_generic_pins_function_dt_subnode_to_map(struct pinctrl_dev *p
group_names[ngroups] = group_name;
pins = devm_kcalloc(dev, npins, sizeof(*pins), GFP_KERNEL);
if (!pins)
return -ENOMEM;
functions = devm_kcalloc(dev, npins, sizeof(*functions), GFP_KERNEL);
if (!functions)
return -ENOMEM;
for (int i = 0; i < npins; i++) {
ret = of_property_read_u32_index(np, "pins", i, &pin);
if (ret)
return ret;
pins[i] = pin;
ret = of_property_read_string(np, "function", &functions[i]);
if (ret)
return ret;
}
ret = pinctrl_utils_reserve_map(pctldev, maps, num_reserved_maps, num_maps, reserve);
if (ret)
return ret;
@@ -102,6 +71,54 @@ static int pinctrl_generic_pins_function_dt_subnode_to_map(struct pinctrl_dev *p
return 0;
};
EXPORT_SYMBOL_GPL(pinctrl_generic_to_map);
static int pinctrl_generic_pins_function_dt_subnode_to_map(struct pinctrl_dev *pctldev,
struct device_node *parent,
struct device_node *np,
struct pinctrl_map **maps,
unsigned int *num_maps,
unsigned int *num_reserved_maps,
const char **group_names,
unsigned int ngroups)
{
struct device *dev = pctldev->dev;
unsigned int pin, *pins;
const char **functions;
int npins, ret;
npins = of_property_count_u32_elems(np, "pins");
if (npins < 1) {
dev_err(dev, "invalid pinctrl group %pOFn.%pOFn %d\n",
parent, np, npins);
return npins;
}
pins = devm_kcalloc(dev, npins, sizeof(*pins), GFP_KERNEL);
if (!pins)
return -ENOMEM;
functions = devm_kcalloc(dev, npins, sizeof(*functions), GFP_KERNEL);
if (!functions)
return -ENOMEM;
for (int i = 0; i < npins; i++) {
ret = of_property_read_u32_index(np, "pins", i, &pin);
if (ret)
return ret;
pins[i] = pin;
ret = of_property_read_string(np, "function", &functions[i]);
if (ret)
return ret;
}
return pinctrl_generic_to_map(pctldev, parent, np, maps, num_maps,
num_reserved_maps, group_names, ngroups,
functions, pins, npins);
}
/*
* For platforms that do not define groups or functions in the driver, but