From: khilman@kernel•org (Kevin Hilman)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v6 1/5] qcom: spm: Add Subsystem Power Manager driver
Date: Fri, 26 Sep 2014 12:04:28 -0700 [thread overview]
Message-ID: <7hwq8q2og3.fsf@deeprootsystems.com> (raw)
In-Reply-To: <20140924184750.GA1004@ilina-mac.local> (Lina Iyer's message of "Wed, 24 Sep 2014 12:47:50 -0600")
Lina Iyer <lina.iyer@linaro•org> writes:
> On Wed, Sep 24 2014 at 12:07 -0600, Kumar Gala wrote:
>>
>>On Sep 23, 2014, at 6:51 PM, Lina Iyer <lina.iyer@linaro•org> wrote:
>>
>>> Based on work by many authors, available at codeaurora.org
>>>
>>> SPM is a hardware block that controls the peripheral logic surrounding
>>> the application cores (cpu/l$). When the core executes WFI instruction,
>>> the SPM takes over the putting the core in low power state as
>>> configured. The wake up for the SPM is an interrupt at the GIC, which
>>> then completes the rest of low power mode sequence and brings the core
>>> out of low power mode.
>>>
>>> The SPM has a set of control registers that configure the SPMs
>>> individually based on the type of the core and the runtime conditions.
>>> SPM is a finite state machine block to which a sequence is provided and
>>> it interprets the bytes and executes them in sequence. Each low power
>>> mode that the core can enter into is provided to the SPM as a sequence.
>>>
>>> Configure the SPM to set the core (cpu or L2) into its low power mode,
>>> the index of the first command in the sequence is set in the SPM_CTL
>>> register. When the core executes ARM wfi instruction, it triggers the
>>> SPM state machine to start executing from that index. The SPM state
>>> machine waits until the interrupt occurs and starts executing the rest
>>> of the sequence until it hits the end of the sequence. The end of the
>>> sequence jumps the core out of its low power mode.
>>>
>>> Signed-off-by: Lina Iyer <lina.iyer@linaro•org>
>>> [lina: simplify the driver for initial submission, clean up and update
>>> commit text]
>>> ---
>>> Documentation/devicetree/bindings/arm/msm/spm.txt | 43 +++
>>> drivers/soc/qcom/Kconfig | 8 +
>>> drivers/soc/qcom/Makefile | 1 +
>>> drivers/soc/qcom/spm.c | 388 ++++++++++++++++++++++
>>> include/soc/qcom/spm.h | 38 +++
>>> 5 files changed, 478 insertions(+)
>>> create mode 100644 Documentation/devicetree/bindings/arm/msm/spm.txt
>>> create mode 100644 drivers/soc/qcom/spm.c
>>> create mode 100644 include/soc/qcom/spm.h
>>
>>General comment, lets use qcom instead of msm for various things.
>>
>>[snip]
>>
> OK, Done. I renamed all msm_ functions to qcom_ functions as well.
>
Does that apply to the other parts of this series too? like the msm-pm
and cpuidle layers?
Kevin
next prev parent reply other threads:[~2014-09-26 19:04 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-23 23:51 [PATCH v6 0/5] QCOM 8074 cpuidle driver Lina Iyer
2014-09-23 23:51 ` [PATCH v6 1/5] qcom: spm: Add Subsystem Power Manager driver Lina Iyer
2014-09-24 1:58 ` Lina Iyer
2014-09-24 16:33 ` Kumar Gala
2014-09-24 17:21 ` Lina Iyer
2014-09-24 17:53 ` Kumar Gala
2014-09-24 19:29 ` Lina Iyer
2014-09-26 14:45 ` Lina Iyer
2014-09-26 14:53 ` Kumar Gala
2014-09-26 15:07 ` Lina Iyer
2014-09-24 17:43 ` Josh Cartwright
2014-09-24 19:01 ` Lina Iyer
2014-09-24 18:07 ` Kumar Gala
2014-09-24 18:47 ` Lina Iyer
2014-09-26 19:04 ` Kevin Hilman [this message]
2014-09-26 19:12 ` Lina Iyer
2014-09-26 19:30 ` Kevin Hilman
2014-09-26 16:59 ` Kevin Hilman
2014-09-26 17:19 ` Lina Iyer
2014-09-23 23:51 ` [PATCH v6 2/5] arm: dts: qcom: Add SPM device bindings for 8974 Lina Iyer
2014-09-24 6:18 ` Pramod Gurav
2014-09-24 13:49 ` Lina Iyer
2014-09-24 14:03 ` Kumar Gala
2014-09-24 14:13 ` Lina Iyer
2014-09-24 17:21 ` Stephen Boyd
2014-09-24 17:23 ` Lina Iyer
2014-09-24 21:46 ` Stephen Boyd
2014-09-23 23:51 ` [PATCH v6 3/5] qcom: msm-pm: Add cpu low power mode functions Lina Iyer
2014-09-23 23:51 ` [PATCH v6 4/5] qcom: cpuidle: Add cpuidle driver for QCOM cpus Lina Iyer
2014-09-23 23:51 ` [PATCH v6 5/5] arm: dts: qcom: Add idle states device nodes for 8974 Lina Iyer
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