Commit e5b3b2d9 authored by Antoine Ténart's avatar Antoine Ténart Committed by Linus Walleij

pinctrl: allows not to define the get_group_pins operation

When using a group only pinctrl driver, which does not have any
information on the pins it is useless to define a get_group_pins
always returning an empty list of pins.

When not using get_group_pin[1], a driver must implement it so
pins = NULL and num_pins = 0. This patch makes it the default
behaviour if not defined in the pinctrl driver when used in
pinmux enable and disable funtions and in pinctrl_groups_show.

It also adds a check in pinctrl_get_group_pins and return -EINVAL if
not defined. This function is called in the gpiolib when adding when
pingroup range. It cannot be used if no group is defined, so this seams
reasonable.

[1] get_group_pin(struct pinctrl_dev *pctldev,
		  unsigned selector,
		  const unsigned **pins,
		  unsigned *num_pins);

Signed-off-by: Antoine Ténart <antoine.tenart@free-electrons.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent eb171a99
......@@ -468,6 +468,9 @@ int pinctrl_get_group_pins(struct pinctrl_dev *pctldev, const char *pin_group,
const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
int gs;
if (!pctlops->get_group_pins)
return -EINVAL;
gs = pinctrl_get_group_selector(pctldev, pin_group);
if (gs < 0)
return gs;
......@@ -1362,13 +1365,14 @@ static int pinctrl_groups_show(struct seq_file *s, void *what)
seq_puts(s, "registered pin groups:\n");
while (selector < ngroups) {
const unsigned *pins;
unsigned num_pins;
const unsigned *pins = NULL;
unsigned num_pins = 0;
const char *gname = ops->get_group_name(pctldev, selector);
const char *pname;
int ret;
int ret = 0;
int i;
if (ops->get_group_pins)
ret = ops->get_group_pins(pctldev, selector,
&pins, &num_pins);
if (ret)
......@@ -1694,8 +1698,7 @@ static int pinctrl_check_ops(struct pinctrl_dev *pctldev)
if (!ops ||
!ops->get_groups_count ||
!ops->get_group_name ||
!ops->get_group_pins)
!ops->get_group_name)
return -EINVAL;
if (ops->dt_node_to_map && !ops->dt_free_map)
......
......@@ -391,14 +391,16 @@ int pinmux_enable_setting(struct pinctrl_setting const *setting)
struct pinctrl_dev *pctldev = setting->pctldev;
const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
const struct pinmux_ops *ops = pctldev->desc->pmxops;
int ret;
const unsigned *pins;
unsigned num_pins;
int ret = 0;
const unsigned *pins = NULL;
unsigned num_pins = 0;
int i;
struct pin_desc *desc;
if (pctlops->get_group_pins)
ret = pctlops->get_group_pins(pctldev, setting->data.mux.group,
&pins, &num_pins);
if (ret) {
const char *gname;
......@@ -470,12 +472,13 @@ void pinmux_disable_setting(struct pinctrl_setting const *setting)
struct pinctrl_dev *pctldev = setting->pctldev;
const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
const struct pinmux_ops *ops = pctldev->desc->pmxops;
int ret;
const unsigned *pins;
unsigned num_pins;
int ret = 0;
const unsigned *pins = NULL;
unsigned num_pins = 0;
int i;
struct pin_desc *desc;
if (pctlops->get_group_pins)
ret = pctlops->get_group_pins(pctldev, setting->data.mux.group,
&pins, &num_pins);
if (ret) {
......
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