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authorGeert Uytterhoeven <geert+renesas@glider.be>2018-11-13 13:47:44 +0100
committerPhilipp Zabel <p.zabel@pengutronix.de>2019-01-07 16:38:26 +0100
commiteaf91db0ab22dc2c664a9782f2f31dcbc410f3b5 (patch)
tree73558bd411854718af939759af7fb5a561abaf57 /include
parentreset: Improve reset controller kernel docs (diff)
downloadlinux-eaf91db0ab22dc2c664a9782f2f31dcbc410f3b5.tar.xz
linux-eaf91db0ab22dc2c664a9782f2f31dcbc410f3b5.zip
reset: Add reset_control_get_count()
Currently the reset core has internal support for counting the number of resets for a device described in DT. Generalize this to devices using lookup resets, and export it for public use. This will be used by generic drivers that need to be sure a device is controlled by a single, dedicated reset line (e.g. vfio-platform). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> [p.zabel@pengutronix.de: fixed a typo in reset_control_get_count comment] Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Diffstat (limited to 'include')
-rw-r--r--include/linux/reset.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/reset.h b/include/linux/reset.h
index 76690cf2e3e0..c1901b61ca30 100644
--- a/include/linux/reset.h
+++ b/include/linux/reset.h
@@ -32,6 +32,8 @@ struct reset_control *devm_reset_control_array_get(struct device *dev,
struct reset_control *of_reset_control_array_get(struct device_node *np,
bool shared, bool optional);
+int reset_control_get_count(struct device *dev);
+
#else
static inline int reset_control_reset(struct reset_control *rstc)
@@ -97,6 +99,11 @@ of_reset_control_array_get(struct device_node *np, bool shared, bool optional)
return optional ? NULL : ERR_PTR(-ENOTSUPP);
}
+static inline int reset_control_get_count(struct device *dev)
+{
+ return -ENOENT;
+}
+
#endif /* CONFIG_RESET_CONTROLLER */
static inline int __must_check device_reset(struct device *dev)