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729de41baf
There are cases where a system will want to read a reset status bit before doing any other toggling. Add a reset_control_status helper function to the reset controller API. Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
98 lines
2.1 KiB
C
98 lines
2.1 KiB
C
#ifndef _LINUX_RESET_H_
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#define _LINUX_RESET_H_
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struct device;
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struct device_node;
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struct reset_control;
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#ifdef CONFIG_RESET_CONTROLLER
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int reset_control_reset(struct reset_control *rstc);
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int reset_control_assert(struct reset_control *rstc);
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int reset_control_deassert(struct reset_control *rstc);
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int reset_control_status(struct reset_control *rstc);
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struct reset_control *reset_control_get(struct device *dev, const char *id);
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void reset_control_put(struct reset_control *rstc);
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struct reset_control *devm_reset_control_get(struct device *dev, const char *id);
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int __must_check device_reset(struct device *dev);
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static inline int device_reset_optional(struct device *dev)
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{
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return device_reset(dev);
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}
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static inline struct reset_control *reset_control_get_optional(
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struct device *dev, const char *id)
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{
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return reset_control_get(dev, id);
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}
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static inline struct reset_control *devm_reset_control_get_optional(
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struct device *dev, const char *id)
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{
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return devm_reset_control_get(dev, id);
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}
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struct reset_control *of_reset_control_get(struct device_node *node,
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const char *id);
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#else
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static inline int reset_control_reset(struct reset_control *rstc)
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{
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WARN_ON(1);
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return 0;
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}
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static inline int reset_control_assert(struct reset_control *rstc)
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{
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WARN_ON(1);
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return 0;
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}
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static inline int reset_control_deassert(struct reset_control *rstc)
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{
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WARN_ON(1);
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return 0;
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}
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static inline int reset_control_status(struct reset_control *rstc)
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{
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WARN_ON(1);
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return 0;
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}
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static inline void reset_control_put(struct reset_control *rstc)
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{
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WARN_ON(1);
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}
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static inline int device_reset_optional(struct device *dev)
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{
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return -ENOSYS;
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}
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static inline struct reset_control *reset_control_get_optional(
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struct device *dev, const char *id)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline struct reset_control *devm_reset_control_get_optional(
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struct device *dev, const char *id)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline struct reset_control *of_reset_control_get(
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struct device_node *node, const char *id)
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{
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return ERR_PTR(-ENOSYS);
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}
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#endif /* CONFIG_RESET_CONTROLLER */
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#endif
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