diff options
Diffstat (limited to 'drivers/pinctrl/pinmux.c')
| -rw-r--r-- | drivers/pinctrl/pinmux.c | 59 |
1 files changed, 50 insertions, 9 deletions
diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c index b874458dcb88..e7ae890dcf1a 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, |