From ba110d90c08d9676370db9a62792f57ade5b3bbf Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Fri, 2 Mar 2012 13:05:49 -0700 Subject: pinctrl: Show selected function and group in pinmux-pins debugfs Until recently, the pinctrl pinmux-pins debugfs file displayed the selected function for each owned pin. This feature was removed during restructing in support of recent API rework. This change restoreds this feature, and also displays the group that the function was selected on, in case a pin is a member of multiple groups. Based on work by: Linus Walleij Signed-off-by: Stephen Warren Signed-off-by: Linus Walleij --- drivers/pinctrl/pinmux.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 67 insertions(+), 1 deletion(-) (limited to 'drivers/pinctrl/pinmux.c') diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c index 4852ebe5712e..86e401754116 100644 --- a/drivers/pinctrl/pinmux.c +++ b/drivers/pinctrl/pinmux.c @@ -187,6 +187,7 @@ static const char *pin_free(struct pinctrl_dev *pctldev, int pin, owner = desc->owner; desc->owner = NULL; + desc->mux_setting = NULL; module_put(pctldev->owner); return owner; @@ -378,7 +379,34 @@ void pinmux_free_setting(struct pinctrl_setting const *setting) 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 i; + struct pin_desc *desc; + + ret = pctlops->get_group_pins(pctldev, setting->data.mux.group, + &pins, &num_pins); + if (ret) { + /* errors only affect debug data, so just warn */ + dev_warn(pctldev->dev, + "could not get pins for group selector %d\n", + setting->data.mux.group); + num_pins = 0; + } + + for (i = 0; i < num_pins; i++) { + desc = pin_desc_get(pctldev, pins[i]); + if (desc == NULL) { + dev_warn(pctldev->dev, + "could not get pin desc for pin %d\n", + pins[i]); + continue; + } + desc->mux_setting = &(setting->data.mux); + } return ops->enable(pctldev, setting->data.mux.func, setting->data.mux.group); @@ -387,7 +415,34 @@ int pinmux_enable_setting(struct pinctrl_setting const *setting) 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 i; + struct pin_desc *desc; + + ret = pctlops->get_group_pins(pctldev, setting->data.mux.group, + &pins, &num_pins); + if (ret) { + /* errors only affect debug data, so just warn */ + dev_warn(pctldev->dev, + "could not get pins for group selector %d\n", + setting->data.mux.group); + num_pins = 0; + } + + for (i = 0; i < num_pins; i++) { + desc = pin_desc_get(pctldev, pins[i]); + if (desc == NULL) { + dev_warn(pctldev->dev, + "could not get pin desc for pin %d\n", + pins[i]); + continue; + } + desc->mux_setting = NULL; + } ops->disable(pctldev, setting->data.mux.func, setting->data.mux.group); } @@ -433,6 +488,8 @@ static int pinmux_functions_show(struct seq_file *s, void *what) static int pinmux_pins_show(struct seq_file *s, void *what) { struct pinctrl_dev *pctldev = s->private; + const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; + const struct pinmux_ops *pmxops = pctldev->desc->pmxops; unsigned i, pin; seq_puts(s, "Pinmux settings per pin\n"); @@ -455,10 +512,19 @@ static int pinmux_pins_show(struct seq_file *s, void *what) !strcmp(desc->owner, pinctrl_dev_get_name(pctldev))) is_hog = true; - seq_printf(s, "pin %d (%s): %s%s\n", pin, + seq_printf(s, "pin %d (%s): %s%s", pin, desc->name ? desc->name : "unnamed", desc->owner ? desc->owner : "UNCLAIMED", is_hog ? " (HOG)" : ""); + + if (desc->mux_setting) + seq_printf(s, " function %s group %s\n", + pmxops->get_function_name(pctldev, + desc->mux_setting->func), + pctlops->get_group_name(pctldev, + desc->mux_setting->group)); + else + seq_printf(s, "\n"); } mutex_unlock(&pinctrl_mutex); -- cgit v1.2.1