[v11,0/6] Add support for Qualcomm A53 CPU clock

Message ID 20171205154701.27730-1-georgi.djakov@linaro.org
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  • Add support for Qualcomm A53 CPU clock
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Message

Georgi Djakov Dec. 5, 2017, 3:46 p.m.
This patchset adds support for the A53 CPU clock on MSM8916 platforms
and allows scaling of the CPU frequency on msm8916 based platforms.

Changes since v10 (https://lkml.org/lkml/2017/12/1/577)
* Addressed Bjorn's comments on APCS clock driver.
* Picked Acks from Rob and Bjorn.

Changes since v9 (https://lkml.org/lkml/2017/9/21/511)
* Added the clock properties to the APCS DT node, instead of adding a subnode
and also replaced patch "mailbox: qcom: Populate APCS child platform devices"
with "mailbox: qcom: Create APCS child device for clock controller".
* Dropped patch "mailbox: qcom: Move the apcs struct into a separate header",
and use dev_get_regmap(dev->parent) in the child driver.
* Addressed Bjorn's comments on a53-pll and apcs-clk drivers.
* Added SPDX copyright identifiers.

Changes since v8 (https://lkml.org/lkml/2017/6/23/476)
 * Converted APCS mailbox driver to use regmap and to populate child
 platform devices that will handle the rest of the functionality
 provided by APCS block.
 * Picked Rob's Ack for the PLL binding.
 * Changed the APCS binding and put it into a separate patch.
 * Addressed review comments.
 * Minor changes.

Changes since v7 (https://lkml.org/lkml/2016/10/31/296)
 * Add the APCS clock controller to the APCS driver to expose both the
 mailbox and clock controller functionality as discussed earlier:
 https://lkml.org/lkml/2016/11/14/860
 * Changed the a53pll compatible string as suggested by Rob.

Changes since v6 (https://lkml.org/lkml/2016/9/7/347)
 * Addressed various comments from Stephen Boyd

Changes since v5 (https://lkml.org/lkml/2016/2/1/407)
 * Rebase to clk-next and update according to the recent API changes.

Changes since v4 (https://lkml.org/lkml/2015/12/14/367)
 * Convert to builtin drivers as now __clk_lookup() is used

Changes since v3 (https://lkml.org/lkml/2015/8/12/585)
 * Split driver into two parts - and separate A53 PLL and
   A53 clock controller drivers.
 * Drop the safe switch hook patch. Add a clock notifier in
   the clock provider to handle switching via safe mux and
   divider configuration.

Changes since v2 (https://lkml.org/lkml/2015/7/24/526)
 * Drop gpll0_vote patch.
 * Switch to the new clk_hw_* APIs.
 * Rebase to the current clk-next.

Changes since v1 (https://lkml.org/lkml/2015/6/12/193)
 * Drop SR2 PLL patch, as it is already applied.
 * Add gpll0_vote rate propagation patch.
 * Update/rebase patches to the current clk-next.

Georgi Djakov (6):
  mailbox: qcom: Convert APCS IPC driver to use regmap
  mailbox: qcom: Create APCS child device for clock controller
  clk: qcom: Add A53 PLL support
  clk: qcom: Add regmap mux-div clocks support
  dt-bindings: mailbox: qcom: Document the APCS clock binding
  clk: qcom: Add APCS clock controller support

 .../devicetree/bindings/clock/qcom,a53pll.txt      |  22 ++
 .../bindings/mailbox/qcom,apcs-kpss-global.txt     |  18 ++
 drivers/clk/qcom/Kconfig                           |  21 ++
 drivers/clk/qcom/Makefile                          |   3 +
 drivers/clk/qcom/a53-pll.c                         | 110 ++++++++++
 drivers/clk/qcom/apcs-msm8916.c                    | 149 ++++++++++++++
 drivers/clk/qcom/clk-regmap-mux-div.c              | 229 +++++++++++++++++++++
 drivers/clk/qcom/clk-regmap-mux-div.h              |  46 +++++
 drivers/mailbox/qcom-apcs-ipc-mailbox.c            |  35 +++-
 9 files changed, 628 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/clock/qcom,a53pll.txt
 create mode 100644 drivers/clk/qcom/a53-pll.c
 create mode 100644 drivers/clk/qcom/apcs-msm8916.c
 create mode 100644 drivers/clk/qcom/clk-regmap-mux-div.c
 create mode 100644 drivers/clk/qcom/clk-regmap-mux-div.h

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Comments

Rob Herring Dec. 6, 2017, 9:08 p.m. | #1
On Tue, Dec 05, 2017 at 05:46:55PM +0200, Georgi Djakov wrote:
> This patchset adds support for the A53 CPU clock on MSM8916 platforms

> and allows scaling of the CPU frequency on msm8916 based platforms.

> 

> Changes since v10 (https://lkml.org/lkml/2017/12/1/577)

> * Addressed Bjorn's comments on APCS clock driver.

> * Picked Acks from Rob and Bjorn.


Errr, really?

Rob
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Stephen Boyd Dec. 22, 2017, 12:49 a.m. | #2
On 12/05, Georgi Djakov wrote:
> This patchset adds support for the A53 CPU clock on MSM8916 platforms

> and allows scaling of the CPU frequency on msm8916 based platforms.


Ok. I will apply just the clk ones? Patches 3,4, and 6?

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Georgi Djakov Dec. 22, 2017, 2:52 p.m. | #3
On 22.12.17 г. 2:49, Stephen Boyd wrote:
> On 12/05, Georgi Djakov wrote:

>> This patchset adds support for the A53 CPU clock on MSM8916 platforms

>> and allows scaling of the CPU frequency on msm8916 based platforms.

> 

> Ok. I will apply just the clk ones? Patches 3,4, and 6?

> 


Yes, i think this would be best. The rest should go through the mailbox tree.
Jassi, are you ok with this?

Thanks,
Georgi
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Stephen Boyd Dec. 29, 2017, 12:01 a.m. | #4
On 12/05, Georgi Djakov wrote:
> Add support for hardware that can switch both parent clock and divider

> at the same time. This avoids generating intermediate frequencies from

> either the old parent clock and new divider or new parent clock and

> old divider combinations.

> 

> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>

> ---


Applied to clk-next

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