The System Power Management Interface (SPMI) is a high-speed,
low-latency, bi-directional, two-wire serial bus suitable for real-time
control of voltage and frequency scaled multi-core application
processors and its power management of auxiliary components. SPMI
obsoletes a number of legacy, custom point-to-point interfaces and
provides a low pin count, high-speed control bus for up to 4 Master and
16 Slave devices.
SPMI is specified by the MIPI (Mobile Industry Process Interface)
Alliance [1].
This patchset is intended both to provide a core implementation of SPMI and
also to provide a controller driver implementation.
- Patches 1-2 implement the SPMI core functionality and provide basic
DT binding documentation
- Patches 3-5 provide an implementation of an SPMI controller, the
Qualcomm SPMI PMIC Arbiter, currently used on the 8x74 SoCs.
- Patch 6 rounds out regmap support for SPMI
Changes from v4[2]:
- Fixed a few minor error-handling bugs found with further testing
- Addressed Courtney Cavin's feedback regarding device tree bindings
- Reworked Kconfig options a bit (allow for building PMIC arb when COMPILE_TEST=y)
Changes from v3[3]:
- Dropped the pm8x41 PMIC driver and pm8xxx-rtc changes as part of this patchset.
(will be sent out separately)
- Rebased on v3.13-rc2
- Move to simple_ida_* for controller ID allocation
- Addressed documentation fixes and nits
- Provide pm_runtime implementation, which leverages SPMI's SLEEP and WAKEUP
commands
- Address spmi_controller object lifetime issues
Changes from v2[4]:
- Dropped RFC.
- Add basic regmap support at Mark Brown's suggestion
- Drop debugfs interface. Debugging SPMI accesses can happen via the regmap
debugfs interface if necessary.
- Add second address-cell in SPMI generic device tree binding, encoding the
address type (suggestion by Stephen Warren)
- Implement interrupt handling functionality within the PMIC Arbiter driver
- Provide basic MFD driver for the PMIC8x41 PMICs, demonstrating SPMI regmap
client use
- Adapt existing pm8xxx-rtc driver to work as a child of the PM8x41 mfd device
Changes from v1[5]:
- Adopted patch (1/5) to #define for_each_available_node() shim
in the !CONFIG_OF case
- Moved device tree logic out of drivers/of and into spmi.c core (this
mirrors what SPI is doing, and what i2c will soon be doing)
- Move of_spmi_add_devices() call into spmi_device_add(), so drivers don't
have to call it explicitly
- Unconditionally build in debugfs code (rely on the underlying
CONFIG_DEBUG_FS switch to throw unused code away)
- Change pr_* print functions to their dev_* equivalents
- Fix copy_{to,from}_user error handling
- Renamed "board_lock" to "ctrl_idr_lock" to better describe it's purpose
- Rework device object lifetime management
- Rename PMIC arb binding document, add description of PMIC arb
- Add generic SPMI device tree bindings
[1]: http://www.mipi.org/specifications/system-power-management-interface
[2]: http://lkml.kernel.org/r/cover.1389738151.git.joshc@xxxxxxxxxxxxxx
[3]: http://lkml.kernel.org/r/cover.1382985169.git.joshc@xxxxxxxxxxxxxx
[4]: http://lkml.kernel.org/r/cover.1377202730.git.joshc@xxxxxxxxxxxxxx
[5]: http://lkml.kernel.org/r/cover.1376596224.git.joshc@xxxxxxxxxxxxxx
Josh Cartwright (4):
spmi: add generic SPMI controller binding documentation
spmi: pmic_arb: add support for interrupt handling
spmi: document the PMIC arbiter SPMI bindings
regmap: spmi: support base and extended register spaces
Kenneth Heitke (2):
spmi: Linux driver framework for SPMI
spmi: Add MSM PMIC Arbiter SPMI controller
.../bindings/spmi/qcom,spmi-pmic-arb.txt | 60 ++
Documentation/devicetree/bindings/spmi/spmi.txt | 41 ++
drivers/Kconfig | 2 +
drivers/Makefile | 1 +
drivers/base/regmap/regmap-spmi.c | 228 +++++-
drivers/spmi/Kconfig | 24 +
drivers/spmi/Makefile | 6 +
drivers/spmi/spmi-pmic-arb.c | 778 +++++++++++++++++++++
drivers/spmi/spmi.c | 609 ++++++++++++++++
include/dt-bindings/spmi/spmi.h | 18 +
include/linux/mod_devicetable.h | 8 +
include/linux/regmap.h | 12 +-
include/linux/spmi.h | 191 +++++
13 files changed, 1943 insertions(+), 35 deletions(-)
create mode 100644 Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt
create mode 100644 Documentation/devicetree/bindings/spmi/spmi.txt
create mode 100644 drivers/spmi/Kconfig
create mode 100644 drivers/spmi/Makefile
create mode 100644 drivers/spmi/spmi-pmic-arb.c
create mode 100644 drivers/spmi/spmi.c
create mode 100644 include/dt-bindings/spmi/spmi.h
create mode 100644 include/linux/spmi.h
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