of_gpio: add support of of_gpio_named_count to be able to count named gpio
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Cc: devicetree-discuss@lists.ozlabs.org Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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@ -78,8 +78,9 @@ err0:
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EXPORT_SYMBOL(of_get_named_gpio_flags);
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/**
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* of_gpio_count - Count GPIOs for a device
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* of_gpio_named_count - Count GPIOs for a device
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* @np: device node to count GPIOs for
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* @propname: property name containing gpio specifier(s)
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*
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* The function returns the count of GPIOs specified for a node.
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*
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@ -93,14 +94,14 @@ EXPORT_SYMBOL(of_get_named_gpio_flags);
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* defines four GPIOs (so this function will return 4), two of which
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* are not specified.
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*/
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unsigned int of_gpio_count(struct device_node *np)
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unsigned int of_gpio_named_count(struct device_node *np, const char* propname)
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{
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unsigned int cnt = 0;
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do {
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int ret;
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ret = of_parse_phandle_with_args(np, "gpios", "#gpio-cells",
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ret = of_parse_phandle_with_args(np, propname, "#gpio-cells",
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cnt, NULL);
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/* A hole in the gpios = <> counts anyway. */
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if (ret < 0 && ret != -EEXIST)
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@ -109,7 +110,7 @@ unsigned int of_gpio_count(struct device_node *np)
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return cnt;
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}
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EXPORT_SYMBOL(of_gpio_count);
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EXPORT_SYMBOL(of_gpio_named_count);
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/**
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* of_gpio_simple_xlate - translate gpio_spec to the GPIO number and flags
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@ -50,7 +50,8 @@ static inline struct of_mm_gpio_chip *to_of_mm_gpio_chip(struct gpio_chip *gc)
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extern int of_get_named_gpio_flags(struct device_node *np,
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const char *list_name, int index, enum of_gpio_flags *flags);
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extern unsigned int of_gpio_count(struct device_node *np);
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extern unsigned int of_gpio_named_count(struct device_node *np,
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const char* propname);
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extern int of_mm_gpiochip_add(struct device_node *np,
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struct of_mm_gpio_chip *mm_gc);
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@ -71,7 +72,8 @@ static inline int of_get_named_gpio_flags(struct device_node *np,
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return -ENOSYS;
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}
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static inline unsigned int of_gpio_count(struct device_node *np)
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static inline unsigned int of_gpio_named_count(struct device_node *np,
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const char* propname)
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{
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return 0;
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}
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@ -88,6 +90,27 @@ static inline void of_gpiochip_remove(struct gpio_chip *gc) { }
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#endif /* CONFIG_OF_GPIO */
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/**
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* of_gpio_count - Count GPIOs for a device
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* @np: device node to count GPIOs for
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*
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* The function returns the count of GPIOs specified for a node.
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*
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* Note that the empty GPIO specifiers counts too. For example,
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*
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* gpios = <0
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* &pio1 1 2
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* 0
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* &pio2 3 4>;
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*
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* defines four GPIOs (so this function will return 4), two of which
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* are not specified.
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*/
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static inline unsigned int of_gpio_count(struct device_node *np)
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{
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return of_gpio_named_count(np, "gpios");
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}
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/**
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* of_get_gpio_flags() - Get a GPIO number and flags to use with GPIO API
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* @np: device node to get GPIO from
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