[PATCH 00/13] Support CPU frequency scaling on QCS404

From: Jorge Ramirez-Ortiz
Date: Mon Dec 17 2018 - 04:46:40 EST

The following patchset enables CPU frequency scaling support on the

Patch 8 "clk: qcom: hfpll: CLK_IGNORE_UNUSED" is a bit controversial;
in this platform, this PLL provides the clock signal to a CPU
core. But in others it might not.

I opted for the minimal ammount of changes without affecting the
default functionality: simply bypassing the COMMON_CLK_DISABLE_UNUSED
framework and letting the firwmare chose whether to enable or disable
the clock at boot. However maybe a DT property and marking the clock
as critical would be more appropriate for this PLL. I'd appreciate the
maintainer's input on this topic.

Co-developed-by: Niklas Cassel <niklas.cassel@xxxxxxxxxx>
Signed-off-by: Niklas Cassel <niklas.cassel@xxxxxxxxxx>
Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@xxxxxxxxxx>

Jorge Ramirez-Ortiz (13):
clk: qcom: gcc: limit GPLL0_AO_OUT operating frequency
mbox: qcom: add APCS child device for QCS404
mbox: qcom: replace integer with valid macro
dt-bindings: mailbox: qcom: Add clock-name optional property
clk: qcom: apcs-msm8916: get parent clock names from DT
clk: qcom: hfpll: get parent clock names from DT
clk: qcom: hfpll: register as clock provider
clk: qcom: hfpll: CLK_IGNORE_UNUSED
arm64: dts: qcom: qcs404: Add OPP table
arm64: dts: qcom: qcs404: Add HFPLL node
arm64: dts: qcom: qcs404: Add the clocks for APCS mux/divider
arm64: dts: qcom: qcs404: Add cpufreq support
arm64: defconfig: Enable HFPLL

.../bindings/mailbox/qcom,apcs-kpss-global.txt | 21 +++++++++++++
arch/arm64/boot/dts/qcom/qcs404.dtsi | 35 ++++++++++++++++++++++
arch/arm64/configs/defconfig | 1 +
drivers/clk/qcom/apcs-msm8916.c | 33 ++++++++++++++------
drivers/clk/qcom/gcc-qcs404.c | 6 ++++
drivers/clk/qcom/hfpll.c | 19 +++++++++++-
drivers/mailbox/qcom-apcs-ipc-mailbox.c | 21 ++++++++-----
7 files changed, 118 insertions(+), 18 deletions(-)