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clk: qcom: Add support for SMD-RPM Clocks

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This adds initial support for clocks controlled by the Resource
Power Manager (RPM) processor on some Qualcomm SoCs, which use
the qcom_smd_rpm driver to communicate with RPM.
Such platforms are msm8916, apq8084 and msm8974.

The RPM is a dedicated hardware engine for managing the shared
SoC resources in order to keep the lowest power profile. It
communicates with other hardware subsystems via shared memory
and accepts clock requests, aggregates the requests and turns
the clocks on/off or scales them on demand.

This driver is based on the codeaurora.org driver:
https://www.codeaurora.org/cgit/quic/la/kernel/msm-3.10/tree/drivers/clk/qcom/clock-rpm.c

Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
[sboyd@codeaurora.org: Remove useless braces for single line if]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This commit is contained in:
Georgi Djakov
2016-11-02 17:56:56 +02:00
committed by Stephen Boyd
parent 54823af9cd
commit 00f64b5887
5 changed files with 668 additions and 0 deletions
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16
drivers/clk/qcom/Kconfig
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@@ -2,6 +2,9 @@ config QCOM_GDSC
bool
select PM_GENERIC_DOMAINS if PM
config QCOM_RPMCC
bool
config COMMON_CLK_QCOM
tristate "Support for Qualcomm's clock controllers"
depends on OF
@@ -9,6 +12,19 @@ config COMMON_CLK_QCOM
select REGMAP_MMIO
select RESET_CONTROLLER
config QCOM_CLK_SMD_RPM
tristate "RPM over SMD based Clock Controller"
depends on COMMON_CLK_QCOM && QCOM_SMD_RPM
select QCOM_RPMCC
help
The RPM (Resource Power Manager) is a dedicated hardware engine for
managing the shared SoC resources in order to keep the lowest power
profile. It communicates with other hardware subsystems via shared
memory and accepts clock requests, aggregates the requests and turns
the clocks on/off or scales them on demand.
Say Y if you want to support the clocks exposed by the RPM on
platforms such as apq8016, apq8084, msm8974 etc.
config APQ_GCC_8084
tristate "APQ8084 Global Clock Controller"
select QCOM_GDSC