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path: root/drivers/interconnect
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2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner2-0/+2
Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-06interconnect: convert to DEFINE_SHOW_ATTRIBUTEYangtao Li1-12/+1
Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2019-01-22interconnect: Revert to previous config if any request failsGeorgi Djakov1-2/+15
When consumers report their bandwidth needs with icc_set_bw(), it's possible that the requested amount of bandwidth is not available or just the new configuration fails to apply on some path. In this case revert to the previous configuration and propagate the error back to the consumers to let them know that bandwidth is not available, hardware is busy or whatever error is returned by the interconnect platform driver. Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-22interconnect: qcom: Add sdm845 interconnect provider driverDavid Dai5-0/+862
Introduce Qualcomm SDM845 specific provider driver using the interconnect framework. Signed-off-by: David Dai <daidavid1@codeaurora.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-22interconnect: Add debugfs supportGeorgi Djakov1-0/+70
Add a functionality to provide information about the current constraints per each node and provider. Reviewed-by: Evan Green <evgreen@chromium.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-22interconnect: Allow endpoints translation via DTGeorgi Djakov1-0/+149
Currently we support only platform data for specifying the interconnect endpoints. As now the endpoints are hard-coded into the consumer driver this may lead to complications when a single driver is used by multiple SoCs, which may have different interconnect topology. To avoid cluttering the consumer drivers, introduce a translation function to help us get the board specific interconnect data from device-tree. Reviewed-by: Evan Green <evgreen@chromium.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-22interconnect: Add generic on-chip interconnect APIGeorgi Djakov3-0/+582
This patch introduces a new API to get requirements and configure the interconnect buses across the entire chipset to fit with the current demand. The API is using a consumer/provider-based model, where the providers are the interconnect buses and the consumers could be various drivers. The consumers request interconnect resources (path) between endpoints and set the desired constraints on this data flow path. The providers receive requests from consumers and aggregate these requests for all master-slave pairs on that path. Then the providers configure each node along the path to support a bandwidth that satisfies all bandwidth requests that cross through that node. The topology could be complicated and multi-tiered and is SoC specific. Reviewed-by: Evan Green <evgreen@chromium.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>