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path: root/drivers/pinctrl/pinmux.c
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Diffstat (limited to 'drivers/pinctrl/pinmux.c')
-rw-r--r--drivers/pinctrl/pinmux.c59
1 files changed, 50 insertions, 9 deletions
diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c
index b874458dc..e7ae890dc 100644
--- a/drivers/pinctrl/pinmux.c
+++ b/drivers/pinctrl/pinmux.c
@@ -107,6 +107,13 @@ static int pin_request(struct pinctrl_dev *pctldev,
desc->name, desc->gpio_owner, owner);
goto out;
}
+ if (ops->strict && desc->mux_usecount &&
+ strcmp(desc->mux_owner, owner)) {
+ dev_err(pctldev->dev,
+ "pin %s already requested by %s; cannot claim for %s\n",
+ desc->name, desc->mux_owner, owner);
+ goto out;
+ }
desc->gpio_owner = owner;
} else {
@@ -116,6 +123,12 @@ static int pin_request(struct pinctrl_dev *pctldev,
desc->name, desc->mux_owner, owner);
goto out;
}
+ if (ops->strict && desc->gpio_owner) {
+ dev_err(pctldev->dev,
+ "pin %s already requested by %s; cannot claim for %s\n",
+ desc->name, desc->gpio_owner, owner);
+ goto out;
+ }
desc->mux_usecount++;
if (desc->mux_usecount > 1)
@@ -544,9 +557,12 @@ static int pinmux_functions_show(struct seq_file *s, void *what)
ret = pmxops->get_function_groups(pctldev, func_selector,
&groups, &num_groups);
- if (ret)
+ if (ret) {
seq_printf(s, "function %s: COULD NOT GET GROUPS\n",
func);
+ func_selector++;
+ continue;
+ }
seq_printf(s, "function: %s, groups = [ ", func);
for (i = 0; i < num_groups; i++)
@@ -572,7 +588,12 @@ static int pinmux_pins_show(struct seq_file *s, void *what)
return 0;
seq_puts(s, "Pinmux settings per pin\n");
- seq_puts(s, "Format: pin (name): mux_owner gpio_owner hog?\n");
+ if (pmxops->strict)
+ seq_puts(s,
+ "Format: pin (name): mux_owner|gpio_owner (strict) hog?\n");
+ else
+ seq_puts(s,
+ "Format: pin (name): mux_owner gpio_owner hog?\n");
mutex_lock(&pctldev->mutex);
@@ -591,14 +612,34 @@ static int pinmux_pins_show(struct seq_file *s, void *what)
!strcmp(desc->mux_owner, pinctrl_dev_get_name(pctldev)))
is_hog = true;
- seq_printf(s, "pin %d (%s): %s %s%s", pin,
- desc->name ? desc->name : "unnamed",
- desc->mux_owner ? desc->mux_owner
- : "(MUX UNCLAIMED)",
- desc->gpio_owner ? desc->gpio_owner
- : "(GPIO UNCLAIMED)",
- is_hog ? " (HOG)" : "");
+ if (pmxops->strict) {
+ if (desc->mux_owner)
+ seq_printf(s, "pin %d (%s): device %s%s",
+ pin,
+ desc->name ? desc->name : "unnamed",
+ desc->mux_owner,
+ is_hog ? " (HOG)" : "");
+ else if (desc->gpio_owner)
+ seq_printf(s, "pin %d (%s): GPIO %s",
+ pin,
+ desc->name ? desc->name : "unnamed",
+ desc->gpio_owner);
+ else
+ seq_printf(s, "pin %d (%s): UNCLAIMED",
+ pin,
+ desc->name ? desc->name : "unnamed");
+ } else {
+ /* For non-strict controllers */
+ seq_printf(s, "pin %d (%s): %s %s%s", pin,
+ desc->name ? desc->name : "unnamed",
+ desc->mux_owner ? desc->mux_owner
+ : "(MUX UNCLAIMED)",
+ desc->gpio_owner ? desc->gpio_owner
+ : "(GPIO UNCLAIMED)",
+ is_hog ? " (HOG)" : "");
+ }
+ /* If mux: print function+group claiming the pin */
if (desc->mux_setting)
seq_printf(s, " function %s group %s\n",
pmxops->get_function_name(pctldev,