Some targets support different DDR types. Detect the DDR type
and populate the frequency table accordingly. OPP framework
supports opp-supported-hw bit map which allows the selected
frequencies to be added to the opp table based on the hardware
version check. Implement the same in the bandwidth monitor device
so that the right frequencies would be added to the opp table.
This patch also adds checks for the latency based device to detect
the DDR type at runtime and add the corresponding frequency map.
Change-Id: Ice5a0b14da67b3f2f07e98bc7349220da7d4efdb
Signed-off-by: Santosh Mardi <gsantosh@codeaurora.org>
Signed-off-by: Rama Aparna Mallavarapu <aparnam@codeaurora.org>
For simple-dev and devbw platform driver does not
support the manual bind / unbind feature through sysfs,
when the governor is registered and started.
Suppress the bind / unbind calls using driver attribute.
Change-Id: Ide843476bdc3870c48f6557097ee549e7a794a22
Signed-off-by: Santosh Mardi <gsantosh@codeaurora.org>
Signed-off-by: Rama Aparna Mallavarapu <aparnam@codeaurora.org>
OPP framework exposes a set of functions that could be used to fetch
the list of supported bandwidth values from DT and to query the list
for an appropriate value while honoring requests from
governors/clients.
Use OPP table APIs and get rid of frequency table logic to make the
code more concise and upstream friendly.
Change-Id: I120ae7230bdbfaaa9523263c65a8b84470583071
Signed-off-by: Rohit Gupta <rohgup@codeaurora.org>
Signed-off-by: Rama Aparna Mallavarapu <aparnam@codeaurora.org>
Absence of traffic is guaranteed when the device sitting behind a devbw
device is suspended. In such cases, it is a waste of power to make non-zero
bandwidth votes or to scale the devbw device. So, provide APIs to
suspend/resume the devbw device as needed.
Change-Id: Id58072aec7a9710eb917f248d9b9bd08d3a1ec6a
Signed-off-by: Saravana Kannan <skannan@codeaurora.org>
Signed-off-by: Rama Aparna Mallavarapu <aparnam@codeaurora.org>
This driver registers itself as a devfreq device that allows devfreq
governors to make IB/AB bandwidth votes. This driver allows the governors
to be agnostic of the bandwidth voting APIs, the number of master ports or
slave ports, the actual port numbers, the system topology, the available
frequencies, etc.
Change-Id: If055ddd580afd41f9668b111e6c09a047488b2e0
Signed-off-by: Saravana Kannan <skannan@codeaurora.org>
Signed-off-by: Rama Aparna Mallavarapu <aparnam@codeaurora.org>
