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authorGeorgi Djakov <georgi.djakov@linaro.org>2020-05-10 18:30:37 +0300
committerGeorgi Djakov <georgi.djakov@linaro.org>2020-05-10 18:30:37 +0300
commit7d374b20908338c9fbb03ea8022a11f3b3e0e55f (patch)
tree158aedc76c869348cdf39f429ebb0f308bd0d1f1 /include/linux/interconnect.h
parent360a10285e7e2722f6869f5dc8e81214a72b57f6 (diff)
downloadlinux-7d374b20908338c9fbb03ea8022a11f3b3e0e55f.tar.xz
interconnect: Add helpers for enabling/disabling a path
There is a repeated pattern in multiple drivers where they want to switch the bandwidth between zero and some other value. This is happening often in the suspend/resume callbacks. Let's add helper functions to enable and disable the path, so that callers don't have to take care of remembering the bandwidth values and handle this in the framework instead. With this patch the users can call icc_disable() and icc_enable() to lower their bandwidth request to zero and then restore it back to it's previous value. Suggested-by: Evan Green <evgreen@chromium.org> Suggested-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Link: https://lore.kernel.org/r/20200507120846.8354-1-georgi.djakov@linaro.org Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Diffstat (limited to 'include/linux/interconnect.h')
-rw-r--r--include/linux/interconnect.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/interconnect.h b/include/linux/interconnect.h
index 770692421f4c..e56a95e3cf25 100644
--- a/include/linux/interconnect.h
+++ b/include/linux/interconnect.h
@@ -30,6 +30,8 @@ struct icc_path *icc_get(struct device *dev, const int src_id,
struct icc_path *of_icc_get(struct device *dev, const char *name);
struct icc_path *devm_of_icc_get(struct device *dev, const char *name);
void icc_put(struct icc_path *path);
+int icc_enable(struct icc_path *path);
+int icc_disable(struct icc_path *path);
int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw);
void icc_set_tag(struct icc_path *path, u32 tag);
@@ -57,6 +59,16 @@ static inline void icc_put(struct icc_path *path)
{
}
+static inline int icc_enable(struct icc_path *path)
+{
+ return 0;
+}
+
+static inline int icc_disable(struct icc_path *path)
+{
+ return 0;
+}
+
static inline int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw)
{
return 0;