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Merge series "Add support for SCMIv3.0 Voltage Domain Protocol and SCMI-Regulator" from Cristian Marussi <cristian.marussi@arm.com>: 

Hi,

this series introduces the support for the new SCMI Voltage Domain Protocol
defined by the upcoming SCMIv3.0 specification, whose BETA release is
available at [1].

Afterwards, a new generic SCMI Regulator driver is developed on top of the
new SCMI VD Protocol.

In V4 Patch 3/5 introduced a needed fix in Regulator framework to cope with
generic named nodes.

The series is currently based on for-next/scmi [2] on top of:

commit b141fca08207 ("firmware: arm_scmi: Fix missing destroy_workqueue()")

Any feedback welcome,

Thanks,

Cristian

---
v5 --> v6
- reordered dt bindings patch
- removed single field struct
- reviewed args to scmi_init_voltage_levels()
- allocating scmi_voltage_info_array contiguously

v4 --> v5
- rebased
- VD Protocol
 - removed inline
 - moved segmented intervals defines
 - fixed some macros complaints by checkpatch

v3 --> v4
- DT bindings
 - using generic node names
 - listing explicitly subset of supported regulators bindings
- SCMI Regulator
 - using of_match_full_name core regulator flag
 - avoid coccinelle false flag complaints
- VD Protocol
 - avoid coccinelle false flag complaints
 - avoiding fixed size typing

v2 --> v3
- DT bindings
  - avoid awkard examples based on _cpu/_gpu regulators
- SCMI Regulator
  - remove multiple linear mappings support
  - removed duplicated voltage name printout
  - added a few comments
  - simplified return path in scmi_reg_set_voltage_sel()
- VD Protocol
  - restrict segmented voltage domain descriptors to one triplet
  - removed unneeded inline
  - free allocated resources for invalid voltage domain
  - added __must_check to info_get voltage operations
  - added a few comments
  - removed fixed size typing from struct voltage_info

v1 --> v2
- rebased on for-next/scmi v5.10
- DT bindings
  - removed any reference to negative voltages
- SCMI Regulator
  - removed duplicate regulator naming
  - removed redundant .get/set_voltage ops: only _sel variants implemented
  - removed condexpr on fail path to increase readability
- VD Protocol
  - fix voltage levels query loop to reload full cmd description
    between iterations as reported by Etienne Carriere
  - ensure transport rx buffer is properly sized calli scmi_reset_rx_to_maxsz
    between transfers

[1]:https://developer.arm.com/documentation/den0056/c/
[2]:https://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git/log/?h=for-next/scmi

Cristian Marussi (5):
  firmware: arm_scmi: Add Voltage Domain Support
  firmware: arm_scmi: add SCMI Voltage Domain devname
  regulator: core: add of_match_full_name boolean flag
  dt-bindings: arm: add support for SCMI Regulators
  regulator: add SCMI driver

 .../devicetree/bindings/arm/arm,scmi.txt      |  43 ++
 drivers/firmware/arm_scmi/Makefile            |   2 +-
 drivers/firmware/arm_scmi/common.h            |   1 +
 drivers/firmware/arm_scmi/driver.c            |   3 +
 drivers/firmware/arm_scmi/voltage.c           | 380 ++++++++++++++++
 drivers/regulator/Kconfig                     |   9 +
 drivers/regulator/Makefile                    |   1 +
 drivers/regulator/of_regulator.c              |   8 +-
 drivers/regulator/scmi-regulator.c            | 409 ++++++++++++++++++
 include/linux/regulator/driver.h              |   3 +
 include/linux/scmi_protocol.h                 |  64 +++
 11 files changed, 920 insertions(+), 3 deletions(-)
 create mode 100644 drivers/firmware/arm_scmi/voltage.c
 create mode 100644 drivers/regulator/scmi-regulator.c

--
2.17.1

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This commit is contained in:
Mark Brown 2020-11-23 20:36:50 +00:00
parent b52b417cca e7095c35ab
commit 5d16a4f954
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GPG Key ID: 24D68B725D5487D0
2 changed files with 9 additions and 2 deletions
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6
drivers/regulator/of_regulator.c
View File

@ -413,8 +413,12 @@ device_node *regulator_of_get_init_node(struct device *dev,
for_each_available_child_of_node(search, child) {
name = of_get_property(child, "regulator-compatible", NULL);
if (!name)
if (!name) {
if (!desc->of_match_full_name)
name = child->name;
else
name = child->full_name;
}
if (!strcmp(desc->of_match, name)) {
of_node_put(search);

3
include/linux/regulator/driver.h
View File

@ -223,6 +223,8 @@ enum regulator_type {
* @name: Identifying name for the regulator.
* @supply_name: Identifying the regulator supply
* @of_match: Name used to identify regulator in DT.
* @of_match_full_name: A flag to indicate that the of_match string, if
* present, should be matched against the node full_name.
* @regulators_node: Name of node containing regulator definitions in DT.
* @of_parse_cb: Optional callback called only if of_match is present.
* Will be called for each regulator parsed from DT, during
@ -314,6 +316,7 @@ struct regulator_desc {
const char *name;
const char *supply_name;
const char *of_match;
bool of_match_full_name;
const char *regulators_node;
int (*of_parse_cb)(struct device_node *,
const struct regulator_desc *,