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firmware: arm_scmi: add option for polling based performance domain operations

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In order to implement fast CPU DVFS switching, we need to perform all
DVFS operations atomically. Since SCMI transfer already provide option
to choose between pooling vs interrupt driven(default), we can opt for
polling based transfers for set,get performance domain operations.

This patch adds option to choose between polling vs interrupt driven
SCMI transfers for set,get performance level operations.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Sudeep Holla
2017-07-21 11:42:24 +01:00
parent d4c3751a8d
commit 5c4ba3cc85
2 changed files with 15 additions and 12 deletions
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8
include/linux/scmi_protocol.h
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@@ -98,18 +98,18 @@ struct scmi_perf_ops {
int (*limits_get)(const struct scmi_handle *handle, u32 domain,
u32 *max_perf, u32 *min_perf);
int (*level_set)(const struct scmi_handle *handle, u32 domain,
u32 level);
u32 level, bool poll);
int (*level_get)(const struct scmi_handle *handle, u32 domain,
u32 *level);
u32 *level, bool poll);
int (*device_domain_id)(struct device *dev);
int (*get_transition_latency)(const struct scmi_handle *handle,
struct device *dev);
int (*add_opps_to_device)(const struct scmi_handle *handle,
struct device *dev);
int (*freq_set)(const struct scmi_handle *handle, u32 domain,
unsigned long rate);
unsigned long rate, bool poll);
int (*freq_get)(const struct scmi_handle *handle, u32 domain,
unsigned long *rate);
unsigned long *rate, bool poll);
};
/**